539 results on '"Šefer, Dragan"'
Search Results
2. Effects of dietary supplementation with benzoic acid and chelated copper, zinc and manganese sources on production performance in piglets
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Perić Dejan, Barea Roberto, Nešić Sladjan, Makivić Lazar, Janjić Jelena, Šefer Dragan, and Marković Radmila
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benzoic acid ,chelates ,dietary supplementation ,piglets ,production results ,Veterinary medicine ,SF600-1100 - Abstract
The aim of this experiment was to investigate the effects of benzoic acid and chelates in which copper (Cu), zinc (Zn) and manganese (Mn) were bound to methionine hydroxy analogue on growth performance, intestinal morphology, intestinal microbiota and digesta pH value of post-weaning piglets at 28 days of age. The experiment was conducted on 96 piglets randomly assigned to one of four treatments (6 replicate pens of 4 piglets each): 1) control (C) – microminerals were provided as sulfates of Cu, Zn and Mn at 130 (80 at second phase), 100, 120 mg/kg in the first phase, respectively; 2) chelates (CTM), microelements were provided as chelates of Cu, Zn and Mn at 130 (80 in second phase), 60, 60 mg/kg in the first phase, respectively; 3) benzoic acid (BA), with the addition of 2500 mg/kg during both periods; 4) chelates + benzoic acid (CTM + BA), microelements were provided as chelates of Cu, Zn and Mn at 130 (80 in second phase), 60, 60 mg/kg in the first phase, respectively, and 2500 mg/kg of benzoic acid during both periods. Results showed that chelates and benzoic acid supplementation not only improved the final body weight (p
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- 2023
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3. The Influence of Zinc and Heavy Metals in Feed and Water on the Quality of Cryopreserved Bull Semen
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Jakovljević Goran, Lazarević Miodrag, Mirilović Milorad, Milovanović Aleksandar, Apić Jelena, Šefer Dragan, Nedić Svetlana, and Vakanjac Slobodanka
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cadmium ,casa ,cryopreserved bull semen ,lead ,mercury ,zinc ,Veterinary medicine ,SF600-1100 - Abstract
This study aimed to assess the influence of different concentrations of zinc (Zn), lead (Pb), mercury (Hg) and cadmium (Cd) found in the feed and water provided to bulls on the concentrations of these metals in cryopreserved bull semen, and to determine their influence onto semen quality parameters. Correlations between heavy metal concentrations in the semen and the quality parameters of semen as estimated by computer-assisted sperm analysis (CASA) and flow cytometry (FC) methods were determined.
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- 2021
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4. Efekti upotrebe organskih formi mikroelemenata na proizvodne performanse i morfometrijske parametre creva kod prasadi
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Perić, Dejan, Šefer, Dragan, Barea, Roberto, Radulović, Stamen, Nešić, Slađan, Jovanović, Dragoljub, Marković, Radmila, Perić, Dejan, Šefer, Dragan, Barea, Roberto, Radulović, Stamen, Nešić, Slađan, Jovanović, Dragoljub, and Marković, Radmila
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Nakon odlučenja, prasad su obično pod stresom zbog nutritivnih, psiholoških, ekoloških, fizioloških i socioloških faktora. U ovom periodu, prasad moraju naglo da se prilagode promeni vrste hrane koju konzumiraju, od tečnog mleka krmače koje je dobro svarljivo, ukusno i ravnomerno raspoređeno tokom dana, na čvrstu suvu hranu koja je manje svarljiva i ukusna. Kao posledica toga, konzumacija hrane se obično smanjuje u prvim danima nakon odlučenja i prasad postaju neuhranjena sa smanjenom stopom rasta, ulazeći u energetski i proteinski deficit. Odlučenje prasadi kao faza u odgoju sa svim stresogenim faktorima koje podrazumeva, izaziva akutne i hronične strukturne i funkcionalne promene u tankom crevu, uključujući skraćivanje crevnih resica i povećanje dubine crevnih kripti. Atrofija resica i prateća hiperplazija kripti, pored već oslabljene crevne funkcije, dodatno narušavaju digestivni i apsorpcioni kapacitet, kao i performanse odlučene prasadi. Ograničena sposobnost i aktivnost digestivnog trakta prasadi u procesu odlučenja zahteva maksimalno prilagođavanje strukture obroka specifičnim potrebama. Pri formulisanju smeša za ishranu prasadi, važno je voditi računa o nivou, izvoru i kvalitetu hranljivih materija. Sa ciljem ispunjenja zahteva konzumerizma, potrošačkog lobija, kao i novih zakonskih regulativa, sa motivom boljeg iskorišćavanja i duže održivosti hrane, a sa konačnim ciljem povećanja proizvodnje i poboljšanja kvaliteta namirnica animalnog porekla, pored osnovnih hraniva u smeše za ishranu svinja dodaje se veliki broj aditiva koji imaju različite namene. Katedra za ishranu i botaniku organizovala je grupno-kontrolni ogled sa ciljem ispitivanja opravdanosti upotrebe organskih formi mikroelemenata (Cu - bakar, Mn - mangan, Zn - cink) u ishrani na zdravstveno stanje, proizvodne performanse prasadi, kao i morfometrijske karakteristike pojedinih segmenata creva prasadi. Ogled je sproveden na 48 odlučenih prasadi istog porekla podeljenih u dve jednake grupe. Na osnov
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- 2024
5. Ukrasne kućne biljke, moguća opasnost za kućne ljubimce
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Grdović, Svetlana, Perić, Dejan, Marković, Radmila, Šefer, Dragan, Grdović, Svetlana, Perić, Dejan, Marković, Radmila, and Šefer, Dragan
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Ukrasne kućne biljke su potencijalna opasnost za zdravlje kućnih ljubimaca. Značajan broj ukrasnih vrsta biljaka je otrovan i njihova konzumacija može dovesti do trovanja kućnih ljubimaca. Kućne biljke sintetišu sekundarne metabolite kojima se štite od insekata i različitih parazita. Ti metaboliti, po hemijskom sastavu, najčešće pripadaju alkaloidima, glikozidima, saponinima, fenolima ili terpenima. Većina ovih metabolita je otrovna za ljude i životinje. Toksični efekti zavise od vrste biljke, njene faze razvića, dela biljke unesenog u organizam i unete količine. Neke ukrasne biljke deluju na kućne ljubimce samo iritirajuće i prouzrokuju pojačano lučenje pljuvačke, povraćanje i dijareju, dok druge imaju jako toksično dejstvo. Najčešći simptomi trovanja ukrasnim biljkama su salivacija, povraćanje, otok jezika i grla, dijareja i slabost. Poznavanje sobnih biljaka i načina na koji njihove supstance mogu izazvati trovanje ljubimaca je veoma korisno jer omogućava lakše uspostavljanje dijagnoze i proces lečenja. Rad ima za cilj da upozori vlasnike kućnih ljubimaca i upozna veterinare sa najčešćim ukrasnim kućnim biljkama koje mogu izazvati epizode trovanje ljubimaca, sa ciljem da se smanji njihova učestalost.
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- 2024
6. Influence of chelated microelements on production results and histological parameters of weaned piglets
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Perić, Dejan, Šefer, Dragan, Barea, Roberto, Radulović, Stamen, Jovanović, Dragoljub, Marković, Radmila, Perić, Dejan, Šefer, Dragan, Barea, Roberto, Radulović, Stamen, Jovanović, Dragoljub, and Marković, Radmila
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- 2024
7. The use of different fat sources in broiler feed and the effect on production performance and meat quality
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Marković, Radmila, Milanković, Branko, Perić, Dejan, Starčević, Marija, Jovanović, Dragoljub, Krstić, Milena, Šefer, Dragan, Marković, Radmila, Milanković, Branko, Perić, Dejan, Starčević, Marija, Jovanović, Dragoljub, Krstić, Milena, and Šefer, Dragan
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- 2024
8. Superior way of human health promotion – selenium enriched table egg
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Šefer, Dragan, Radulović, Stamen, Grdović, Svetlana, Perić, Dejan, Marković, Radmila, Šefer, Dragan, Radulović, Stamen, Grdović, Svetlana, Perić, Dejan, and Marković, Radmila
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Eggs have an important role in human nutrition and are an important source of protein, fat and trace elements. The production and consumption of eggs in the world has been increasing in recent decades. The consumption of eggs has long been associated with negative effects on human health, mainly due to their cholesterol content. However, it is now known that the level of cholesterol in the serum is influenced by several other factors such as genetic predisposition, hormonal status and eating habits, and not only cholesterol from eggs. In recent years, the foods that are used daily in people’s diet are not only intended to satisfy the needs in basic nutrients, but food is expected to prevent food-related diseases and acquire a better immune status. By using specific nutritional strategies, it is possible to produce functional food that, in addition to basic nutrients, also contains components that participate in preserving health and reducing the risk of disease. A low concentration of selenium in the soil, and consequently in the nutrients used in feed, can cause a deficiency of this microelement in animals. Deficiency symptoms also occur in humans through foods of animal origin, which significantly weakens the system of antioxidant protection in the body. The utilization of selenium in animals depends on the chemical form in which it is found in the meal. Selenium, which is used as an additive in vitamin-mineral premixes in feed for laying hens, is present in one of two basic forms: organically bound to amino acids (selenocysteine and selenomethionine) or in the form of an inorganic salt (most often sodium selenite). After entering the body through a meal, selenium is incorporated into tissue proteins, which creates its reserve. Deposited selenium in the body is in an inactive state and in cases of oxidative stress or selenium deficiency in feed, it changes to an active form. The source of selenium in feed mixtures for laying hens has an effect on the selenium cont
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- 2024
9. Presence of natural radionuclides and toxic elements in monocalcium phosphate, complete feed and pig manure
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Vranješ, Borjana, Milićević, Dragan, Šefer, Dragan, Stefanović, Srđan, Ajtić, Jelena, and Mitrović, Branislava M.
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- 2020
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10. The effects of dietary Selenium-yeast level on glutathione peroxidase activity, tissue Selenium content, growth performance, and carcass and meat quality of broilers
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Marković, Radmila, Ćirić, Jelena, Drljačić, Aleksandar, Šefer, Dragan, Jovanović, Ivan, Jovanović, Dragoljub, Milanović, Svetlana, Trbović, Dejana, Radulović, Stamen, Baltić, Milan Ž, and Starčević, Marija
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- 2018
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11. The content of ten elements in pig feed and manure and its relationship with element concentration in earthworms on swine farms
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Mitrović, Branislava, Stefanović, Srđan, Šefer, Dragan, Jovanović, Dragoljub, and Ajtić, Jelena
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manure ,ICP-MS ,earthworms ,Elements ,Toxicology ,environment ,pig feedstuffs - Abstract
The aim of this investigation is to determine the content of ten elements, Cr, Mn, Co, Ni, Fe, Zn, As, Cu, Se, and Cd, in pig feed, manure and earthworms (Lumbricus terrestris). Samples were collected during 2015 and 2017, on four pig farms in Serbia, and analyzed for elements by inductively coupled plasma mass spectrometry. According to the mean concentrations, the elements show the following trends: Fe > Mn > Zn > Cr > Ni > Cu > Cd > Se > As > Co in monocalcium phosphate, Zn > Mn > Fe > Cu > Co > Cr > Ni > Se > As > Cd in vitamin-mineral premixes, Fe > Zn > Mn > Cu > Ni > Cr > Se > Co > As > Cd in complete feed, and Fe > Zn > Mn > Cu > Ni > Cr > Co > Se > Cd > As in pig manure. The obtained results show that monocalcium phosphate and vitamin-mineral premixes are the main source of Mn, Zn, and Fe in complete feed mixtures. The Cd concentration in one sample of monocalcium phosphate exceeds the maximum permissible level. Only one out of six investigated complete feed mixtures was in accordance with the national and EU regulations. The presence of Fe, Zn, and Mn in earthworms reflects their concentration in pig manure, but this is not noticed for Cr, Cu, Se, As, Ni, Co, and Cd.
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- 2023
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12. Aflatoxins in feed
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Jovanović Dragoljub, Marković Radmila, Radulović Stamen, Grdović Svetlana, Krstić Milena, and Šefer Dragan
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Aflatoxins ,climate change ,feed ,preventive measures ,Veterinary medicine ,SF600-1100 - Abstract
Background. Mycotoxins are toxic secondary metabolites, which are synthesized from a large number of intermediates from the primary metabolism of saprophytic molds. Aflatoxins, due to their genotoxic and carcinogenic effects, are the most important group of mycotoxins from the aspect of their impact on human and animal health. Of all known aflatoxins, AFB1 is the most frequent, with the most harmful impact on human and animal health. Scope and Approach. Due to their prevalence and toxicity, monitoring the presence of aflatoxins in the food chain is required. The scope of this paper is to provide information on the presence of aflatoxins in animal feed and in milk. This paper describes temperature increases in Europe that are contributing to the increased presence of aflatoxins in food, as well as aflatoxin prevention and protection measures. Key Findings and Conclusions. During the last decade, serious contamination of corn with aflatoxins was recorded in southern Europe. In the summer of 2012, Serbia recorded high concentrations of aflatoxins in corn and milk. Based on climate change data, it is expected that aflatoxin contamination in corn will become more frequent. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 31034]
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- 2018
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13. Značaj izbora hraniva na masnokiselinski sastav mesa svinja
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Marković, Radmila, Baltić, Milan Ž., Šefer, Dragan, Perić, Dejan, Grdović, Svetlana, Todorović-Laudanović, Milica, Marković, Radmila, Baltić, Milan Ž., Šefer, Dragan, Perić, Dejan, Grdović, Svetlana, and Todorović-Laudanović, Milica
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Veliki broj istraživanja potvrđuje povezanost učestalosti hroničnih masovnih nezaraznih bolesti sa ishranom ljudi. Pri tom se u poseban značaj pridaje upotrebi masti u ishrani ljudi, naročito n-3 i n-6 masnih kiselina i njihovom međusobnom odnosu. Na sadržaj i odnos masnih kiselina mesa svinja može da se utiče izborom hraniva za ishranu svinja. Cilj naših istraživanja bio je ispitivanje uticaja komercijalnog preparata lana, dodatog u hranu za svinje na masnokiselinski sastav mesa svinja. Masnokiselinski sastav hrane za svinje i mesa svinja određen je gasnom hromatografijom. Upotreba lana, u ishrani svinja značajno utiče na sadržaj zasićenih, mononezasićenih i polinezasićenih masnih kiselina u mesu svinja. Meso svinja hranjenih sa ovim dodatkom imalo je značajno povoljniji odnos n-6/ n-3 masnih kiselina, u odnosu na meso svinja hranjenih bez dodatka preparat lana. Dodavanjem preparata lana, u hranu za svinje poboljšava se nutritivna vrednost mesa svinja.
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- 2023
14. Jaje obogaćeno selenom – superioran vid promocije zdravlja ljudi
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Šefer, Dragan, Perić, Dejan, Radulović, Stamen, Grdović, Svetlana, Jovanović, Dragoljub, Marković, Radmila, Šefer, Dragan, Perić, Dejan, Radulović, Stamen, Grdović, Svetlana, Jovanović, Dragoljub, and Marković, Radmila
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Jaja imaju značajnu ulogu u ishrani ljudi i predstavljaju važan izvor proteina, masti i mikroelemenata. Proizvodnja i potrošnja jaja u svetu poslednjih decenija je u porastu. Konzumacija jaja dugo vremena bila je vezana za negativne efekte na zdravlje ljudi, uglavnom zbog sadržaja holesterola. Međutim, danas je poznato da na nivo holesterola u serumu utiče više drugih faktora kao što su genetska predispozicija, hormonski status i hranidbene navike, a ne isključivo holesterol iz jaja. Poslednjih godina, namirnice koje se svakodnevno koriste u ishrani ljudi nisu namenjene samo zadovoljenju potreba u osnovnim hranljivim materijama nego se od hrane očekuje prevencija bolesti povezanih sa hranom i sticanje boljeg imunološkog statusa. Upotrebom specifičnih nutritivnih strategija moguće je proizvesti funkcionalnu hranu koja pored osnovnih hranljivih materija sadrži i komponente koje učestvuju u očuvanju zdravlja i smanjenju rizika u nastanku bolesti. Niska koncentracija selena u zemljištu, a posledično i u hranivima koja se koriste u hrani za životinje, može prouzrokovati deficit ovog mikroelementa kod životinja. Putem namirnica animalnog porekla simptomi deficita javljaju se i kod ljudi, čime se značajno slabi sistem antioksidativne zaštite u organizmu. Iskorišćavanje selena kod životinja zavisi od hemijskog oblika u kome se nalazi u obroku. Selen koji se koristi kao dodatak u vitaminsko mineralnim predsmešama u hrani za koke nosilje prisutan je u jednom od dva osnovna oblika: organski vezan za aminokiseline (selenocistein i selenometionin) ili u formi neorganske soli (najčešće natrijum selenit). Nakon unošenja u organizam putem obroka, selen se ugrađuje u tkivne proteine čime se stvara njegova rezerva. Deponovani selen u organizmu nalazi se u neaktivnom stanju i u slučajevima oksidativnog stresa ili deficita selena u hrani, prelazi u aktivan oblik. Izvor selena u smešama za ishranu koka nosilja ostvaruje uticaj na sadržaj selena u jajima. Dodatkom organskog se
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- 2023
15. Mikroalge kao izvor omega-3 masnih kiselina u ishrani životinja
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Grdović, Svetlana, Perić, Dejan, Marković, Radmila, Jovanović, Dragoljub, Šefer, Dragan, Grdović, Svetlana, Perić, Dejan, Marković, Radmila, Jovanović, Dragoljub, and Šefer, Dragan
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Mnoge mikroalge su važni izvori polinezasićenih masnih kiselina, uglavnom eikozapentaenske kiseline (EPA) i dokozaheksaenske kiseline (DHA). Ove masne kiseline životinje slabo sintetišu, pa ih treba dodavati u ishranu, Takođe, većina mikroalgi sadrži i esencijalne aminokiseline koje ljudi i životinje ne mogu sintetisati. Sadržaj aminokiselina kao što su lizin, metionin, triptofan, treonin, valin, histidin i izoleucin u nekim mikroalgama je uporediv sa onima iz jaja ili soje. Mikroalge su izvor svih važnih vitamina kao što su tokoferoli, askorbinska kiselina, vitamini B1, B2, B6, B12, folna kiselina, nikotinska kiselina, biotin i dr. Pored toga, one su bogat izvor svih važnih minerala, kako makroelemenata (Na, K, Ca i Mg) tako i mikroelemenata (Fe, Zn, Mn i Cu). Isto tako, mikroalge sadrže širok spektar pigmenata (hlorofili, karotenoidi, fikobiliproteini i ksantofili). Upotreba malih količina biomase mikroalgi u hrani za životinje može biti od koristi za fiziologiju životinja, poboljšanje imunog odgovora, otpornosti na bolesti i poboljšane funkcije creva. Dodavanje mikroalgi u ishranu životinja poboljšava njihovo ukupno zdravlje, produktivnost, kvalitet i stabilnost dobijenih animalnih proizvoda. Od ukupne svetske proizvodnje algi, 30% je namenjeno za primenu u hrani za životinje. Preovlađujuće vrste su: Schizochytrium sp., Chlorella sp., Arthrospira sp., Isochrysis sp. i Porphyridium sp. Prema literaturnim podacima sprovedena su istraživanja na različitim vrstama životinja: živina, svinje, krave, ovce, koze, psi, mačke i ribe, Upotreba mikroalgi u ishrani životinja je interesantan predmet istraživanja i u budućnosti je potrebno mnogo više studija koje bi se bavile ovom problematikom.
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- 2023
16. Uticaj dodavanja CLA u ishrani brojlera na vrednosti lipidnih indeksa u mesu
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Perić, Dejan, Šefer, Dragan, Baltić, Milan Ž., Branković, Ivana, Janjić, Jelena, Radulović, Stamen, Marković, Radmila, Perić, Dejan, Šefer, Dragan, Baltić, Milan Ž., Branković, Ivana, Janjić, Jelena, Radulović, Stamen, and Marković, Radmila
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Ishrana životinja prošla je u svom razvoju kroz nekoliko faza, počev od potpune empirije do savremenog koncepta ishrane koji počiva na vrlo preciznim istraživanjima metaboličkih i biohemijskih promena na nivou ćelije. Cilj tova brojlera je da se korišćenjem pretežno biljnih hraniva, uz manji dodatak animalnih, poveća telesna masa životinje. Razvojem svesti potrošača, imperativ u stočarstvu postala je ne samo količina proizvedene namirnice, nego i kvalitet proizvedene namirnice. Kod monogastričnih životinja masne kiseline prisutne u hrani apsorbuju se u gastrointestinalnom traktu uglavnom nepromenjene, što znači da profil masnih kiselina tkiva direktno odražava profil masnih kiselina prisutnih u obroku životinja. Esencijalne masne kiseline služe kao gradivne jedinice brojnih hormona i veoma su važna komponenta ćelijskih membrane, a njihov nedostatak ili neadekvatan odnos u hrani može da dovede do negativnih efekata po zdravlje ljudi. Konjugovana linolna kiselina (CLA) predstavlja grupu izomera linolne kiseline (C18:2), a najzanimljivija je njena uloga u prevenciji tumoroznih oboljenja, areteroskleroze i dijabetesa. Nalaze se u mesu i mleku preživara, a s obzirom da živina nema sposobnost sinteze CLA, biotehnološkim rešenjima moguće ih je dodati u smeše. Naučna javnost nameće savremene parametre određivanja nutritivne vrednosti masnih kiselina u kome se izdvajaju AI – aterogeni indeks, TI – trombogeni indeks i h/H hipoholesterolemični/hiperholesterolemični indeks. Cilj ovog istraživanja bio je da se utvrdi efekat dodatka CLA u ishranu brojlera na lipidne indekse pojedinih kategorija mesa, sa aspekta zdravstvenih potreba potrošača. Utvrđen je značajan uticaj korekcije masnokiselinskog sastava hrane na vrednosti lipidnih indeksa.
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- 2023
17. Fitogeni aditivi u hrani za brojlere
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Marković, Radmila, Šefer, Dragan, Perić, Dejan, Grdović, Svetlana, Savić, Kristina, Marković, Radmila, Šefer, Dragan, Perić, Dejan, Grdović, Svetlana, and Savić, Kristina
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- 2023
18. Eterična ulja u hranidbi preživača- manja proizvodnja metana
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Grdović, Svetlana, Perić, Dejan, Marković, Radmila, Šefer, Dragan, Grdović, Svetlana, Perić, Dejan, Marković, Radmila, and Šefer, Dragan
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- 2023
19. Proizvodnja jaja obogaćenih selenom primenom biotehnoloških rešenja u ishrani koka nosilja
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Šefer, Dragan, Perić, Dejan, Jakić-Dimić, Dobrila, Šefer, Dragan, Perić, Dejan, and Jakić-Dimić, Dobrila
- Abstract
Jaja predstavljaju važan izvor proteina, masti i mikroelemenata koji imaju značajnu ulogu u ishrani ljudi. Proizvodnja i potrosnja jaja u svetu poslednjih decenija je u porastu. Konzumacija jaja dugo vremena bila je vezana za negativne efekte na zdravlje ljudi, uglavnom zbog sadržaja holesterola. Međutim, danas je poznato da na nivo holesterola u serumu utiče vise drugih faktora kao sto su genetska predispozicija, hormonski status i hranidbene navike, a ne isključivo holesterol iz jaja. Poslednjih godina, namirnice koje se svakodnevno koriste u ishrani ljudi nisu namenjene samo zadovoljenju potreba u osnovnim hranljivim materijama nego se od hrane očekuje prevencija bolesti povezanih sa hranom i sticanje boljeg imunoloskog statusa. Upotrebom specifičnih nutritivnih strategija moguće je proizvesti funkcionalnu hranu koja pored osnovnih hranljivih materija sadrži i komponente koje učestvuju u očuvanju zdravlja i smanjenju rizika u nastanku bolesti. Niska koncentracija selena u zemljistu, a posledično i u hranivima koja se koriste u hrani za životinje, može prouzrokovati deficit ovog mikroelementa kod životinja. Putem namirnica animalnog porekla simptomi deficita javljaju se i kod ljudi, čime se značajno slabi sistem antioksidativne zastite u organizmu. Iskorisćavanje selena kod životinja zavisi od hemijskog oblika u kome se nalazi u obroku. Selen koji se koristi kao dodatak u vitaminsko mineralnim predsmesama u hrani za koke nosilje prisutan je u jednom od dva osnovna oblika: organski vezan za aminokiseline (selenocistein i selenometionin) ili u formi neorganske soli (najčesće natrijum selenit). Nakon unosenja u organizam putem obroka, selen se ugrađuje u tkivne proteine čime se stvara njegova rezerva. Deponovani selen u organizmu nalazi se u neaktivnom stanju i u slučajevima oksidativnog stresa ili deficita selena u hrani, prelazi u aktivan oblik. Izvor selena u smesama za ishranu koka nosilja ostvaruje uticaj na sadržaj selena u jajima. Dodatkom organskog selena nos
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- 2023
20. Učinak živih stanica kvasca na proizvodne pokazatelje brojlera
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Marković, Radmila, Šefer, Dragan, Perić, Dejan, Mirilović, Milorad, Maksimović, Željko, Marković, Radmila, Šefer, Dragan, Perić, Dejan, Mirilović, Milorad, and Maksimović, Željko
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- 2023
21. Značaj adekvatnog nivoa celuloze u ishrani krmača
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Perić, Dejan, Marković, Radmila, Radulović, Stamen, Grdović, Svetlana, Kureljušić, Branislav, Jovanović, Dragoljub, Šefer, Dragan, Perić, Dejan, Marković, Radmila, Radulović, Stamen, Grdović, Svetlana, Kureljušić, Branislav, Jovanović, Dragoljub, and Šefer, Dragan
- Abstract
U ishrani svinja, vlakna oduvek predstavljaju energetski razređivač potpunih smeša. U novije vreme, dijetalna vlakna se definišu kao deo ugljenih hidrata koji je nesvarljiv za enzime koji se luče u gastrointestinalnom traktu sisara. Savremeni način koncipiranja smeša za suprasne i dojne krmače podrazumeva korišćenje jedne od kategorija nesvarljivih dijetalnih vlakana - celuloze iz različitih hraniva sa ciljem ublažavanja osećaja gladi i sprečavanja konstipacije tokom graviditeta sa ograničenom energetskom vrednošću obroka u svrhu povećanja broja živorođenih prasadi po leglu. Međutim, dijetalna vlakna su grupa ugljenih hidrata sa svojstvima koja variraju u zavisnosti od botaničkog porekla vlakana, tehnike obrade i drugih faktora koji zavise od krmače kao što su starost, fiziološko stanje, količina unesene hrane i sastav gastrointestinalne mikrobiote. Ipak, upotrebom savremene analitike i preciznim formulacijama, moguće je upotrebom dijetalnih vlakana ostvariti pozitivne efekte sa aspekta reproduktivnih performansi, ali i dobrobiti krmača. Pored već utvrđenih efekata korišćenja vlakana, potrebno je utvrditi koja svojstva dijetalna vlakna su najefikasnija kod izazivanja promena u endokrinom sistemu i folikularne tečnosti jajnika, kako bi se ostvario krajnji cilj preživljavanja embriona i otpornosti potomstva. Naučna istraživanja su usmerena na temu korišćenja naprednih tehnika za karakterizaciju komponenti dijetalnih vlakana, a rezultate ovakvih istraživanja treba implementirati u savremene nutritivne strategije.
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- 2023
22. Effet des oligo-elements chelates sur performances zootechniques et la sante intestinale des porcelets sevres
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Barea, Roberto, Huard, Mireille, Perić, Dejan, Marković, Radmila, Šefer, Dragan, Barea, Roberto, Huard, Mireille, Perić, Dejan, Marković, Radmila, and Šefer, Dragan
- Abstract
Utiliser une source d’oligo-éléments chélatés dans l’aliment permet de fournir plus efficacement les minéraux aux tissus de l’animal, améliorant ses fonctions métaboliques et, par conséquent, ses performances productives.
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- 2023
23. Prevencija metaboličkih bolesti visokoproizvodnih krava pravilnom strategijom ishrane u peripartalnom periodu
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Šefer, Dragan, Perić, Dejan, Radulović, Stamen, Grdović, Svetlana, Marković, Radmila, Šefer, Dragan, Perić, Dejan, Radulović, Stamen, Grdović, Svetlana, and Marković, Radmila
- Abstract
Pojava metaboličkih bolesti visoko-mlečnih krava u peripartalnom periodu (hipokalcemija, dislokacija sirišta, acidoza buraga, kompleks ketoza/masna jetra) etiološki je tesno povezana sa ishranom životinja. Ključni faktori u nastanku metaboličkih bolesti su deficit ili suficit energije u određenim periodima proizvodno- reproduktivnog ciklusa, kao i poremećaji bilansa mineralnih materija ili vitamina. Veoma često nastanak jedne metaboličke bolesti značajno povećava rizik za nastanak drugih metaboličkih bolesti. Veća učestalost određenih infekcija u peripartalnom periodu takođe se može povezati sa metaboličkim bolestima preživara. Nova znanja iz oblasti fiziologije varenja i iskorišćavanja hrane, proizvodnje i pripremanja hrane i tehnologija ishrane, uz znatno bolje poznavanje specifičnih osobina i hranljive vrednosti svakog hraniva ponaosob, kao i interakcija koje nastaju među hranivima u obroku neophodan su preduslov za uspešnu prevenciju metaboličkih bolesti.
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- 2023
24. Utvrđivanje sastojaka animalnog porekla u hrani za životinje - zašto i kako?
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Perić, Dejan, Jovanović, Dragoljub, Marković, Radmila, Šefer, Dragan, Grdović, Svetlana, Nešić, Ksenija, Perić, Dejan, Jovanović, Dragoljub, Marković, Radmila, Šefer, Dragan, Grdović, Svetlana, and Nešić, Ksenija
- Abstract
Sastojci životinjskog porekla u hrani za životinje predstavljaju idealan izvor esencijalnih aminokiselina. Međutim, sa izbijanjem bovine spongiformne encefalopatije, njihova upotreba se u ishrani farmskih životinja zabranjuje ili stavlja pod strogu kontrolu. U Srbiji 2006. godine počinje redovan monitoring hrane za životinje metodom klasične svetlosne mikroskopije propisan Pravilnikom o utvrđivanju Programa mera zdravstvene zaštite životinja. Prema trenutno važećem Pravilniku o utvrđivanju mera ranog otkrivanja i dijagnostike zarazne bolesti transmisivnih spongioformnih encefalopatija (Sl.glasnik 96/10, 33/16,54/19), kod farmskih životinja je dozvoljena upotreba ribljeg brašna u ishrani svinja i živine, kao i u zamenama mleka za telad. U akvakulturi se koriste i hraniva poreklom od kopnenih vrsta životinja, izuzev od preživara, a za određivanje vrste životinja primenjuje se real time PCR metoda. Jedno od najracionalnijih rešenja za korišćenje sporednih proizvoda animalnog porekla je njihovo ponovno uključivanje u lanac ishrane. Zato je u Evropskoj uniji od 2021. godine dozvoljena upotreba sastojaka poreklom od svinja u obrocima za živinu i poreklom od živine u obrocima za svinje. Insekti kao izvor proteina postaju takođe sve aktuelnija tema. Sve protokole i metode kontrole propisuje EU Referentna laboratorija za animalne proteine u hrani za životinje, sa ciljem zadovoljenja zahteva bezbednosti, ali i ispitivanja autentičnosti i deklaracija i otkrivanja prevarnih radnji., Ingredients of animal origin in feed represent an ideal source of essential amino acids. However, with the outbreak of bovine spongiform encephalopathy, their use is prohibited, or placed under strict control. In Serbia, regular monitoring of animal feed began in 2006, using the method of classical light microscopy. It is prescribed by the regulation on the “Program of Animal Health Protection Measures.” According to the current regulation on the “Measures for Early Detection and Diagnosis of the Infectious Disease of Transmissible Spongiform Encephalopathies” (Official Gazette 96/10, 33/16, 54/19), the use of fish meal for farm animals is allowed in the diet of pigs and poultry, as well as in milk substitutes, for calves. In aquaculture, feeds originating from terrestrial animal species are also used, except from ruminants, and the real time PCR method is used to detect the animal species. One of the most rational solutions for using by-products of animal origin is their re-inclusion in the food chain. That’s why in the European Union, from 2021, the use of ingredients of pig origin in poultry rations and of poultry origin in pig rations is allowed. Insects as a source of protein are also becoming an increasing topic. All protocols and control methods are prescribed by the EU Reference Laboratory for Animal Proteins in Feedingstuffs, with the aim of meeting safety requirements, but also testing the authenticity and declarations and detecting fraudulent actions.
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- 2023
25. Entomophagy — a novel option in animal and human nutrition
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Nešić, Ksenija, Marković, Radmila, Šefer, Dragan, Nešić, Ksenija, Marković, Radmila, and Šefer, Dragan
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Entomophagy is not a new phenomenon in the world. Moreover, it is a traditional diet in a large part of the planet. However, in the European framework it belongs to the category of novel food and although the topic is often debated, it represents a growing choice in human and animal nutrition. Edible insects have the potential to serve as a healthy, sustainable alternative to animal protein sources due to their valuable nutritional composition. They may have superior health benefits based on high levels of essential amino acids, omega-3 and omega-6 fatty acids, vitamin B12, iron, zinc, fibre and antioxidants. They could offer a myriad of environmental benefits, including overall reductions in greenhouse gas emissions and reduced use of agricultural land and water. Future research should aim to understand the beneficial effects of whole insects or insect isolates compared to traditional foods of animal and plant origin. Although insects have the potential to be used as meat substitutes or dietary supplements, leading to benefits for human health and the environment, this paper does not aim to ultimately propagate their use, but to point out their advantages and qualities, as well as potential dangers and risks, and finally to present ways of placing insects on the European market.
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- 2023
26. Effects of spent mushroom substrate on growth performance and meat characteristics of animals
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Grdović, Svetlana, Marković, Radmila, Perić, Dejan, Šefer, Dragan, Grdović, Svetlana, Marković, Radmila, Perić, Dejan, and Šefer, Dragan
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After the production of mushrooms for human consumption, the used substrate remains (SMS — spent mushroom substrate). As much as five kilograms of spent substrate result from the production of one kilogram of mushrooms. Considering that the global production of mushrooms in the world has increased in recent decades, the amount of spent substrate has also increased sharply, which can lead to an unfavourable impact on the environment. The assumptions are that the amount of consumed substrate will exceed the value of 6 tonnes of SMS per km2 of global land surface. This data points to the need for thinking and scientific research on how to reuse SMS. Various studies have established that SMS can first be used as a material from which to extract enzymes that remain after the production of mushrooms. Then, SMS can be used to grow one or two more production batches of mushrooms. Finally, SMS can be used as raw material for feed, as compost for plant growth and as biofuel. Research into the use of SMS as feed is particularly interesting, where its effect in the diet of various ruminant and non‑ruminant species was examined.
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- 2023
27. Effects of dietary supplementation with benzoic acid and chelated copper, zinc and manganese sources on production performance in piglets
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Perić, Dejan, Barea, Roberto, Nešić, Slađan, Makivić, Lazar, Janjić, Jelena, Šefer, Dragan, Marković, Radmila, Perić, Dejan, Barea, Roberto, Nešić, Slađan, Makivić, Lazar, Janjić, Jelena, Šefer, Dragan, and Marković, Radmila
- Abstract
The aim of this experiment was to investigate the effects of benzoic acid and chelates in which copper (Cu), zinc (Zn) and manganese (Mn) were bound to methionine hydroxy analogue on growth performance, intestinal morphology, intestinal microbiota and digesta pH value of post-weaning piglets at 28 days of age. The experiment was conducted on 96 piglets randomly assigned to one of four treatments (6 replicate pens of 4 piglets each): 1) control (C) – microminerals were provided as sulfates of Cu, Zn and Mn at 130 (80 at second phase), 100, 120 mg/kg in the first phase, respectively; 2) chelates (CTM), microelements were provided as chelates of Cu, Zn and Mn at 130 (80 in second phase), 60, 60 mg/kg in the first phase, respectively; 3) benzoic acid (BA), with the addition of 2500 mg/kg during both periods; 4) chelates + benzoic acid (CTM + BA), microelements were provided as chelates of Cu, Zn and Mn at 130 (80 in second phase), 60, 60 mg/kg in the first phase, respectively, and 2500 mg/kg of benzoic acid during both periods. Results showed that chelates and benzoic acid supplementation not only improved the final body weight (p<0.05), average daily gain (p<0.05) and feed conversion ratio (p<0.05), but also increased the morphology performance and decreased the number of E. coli in the jejunum and ileum in the treated groups (p<0.05). This study provides the evidence that dietary supplementation has beneficial effects on the intestinal morphology and microflora of weaned pigs, which can partly explain why growth performance of the piglets was improved.
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- 2023
28. Važnost optimalne razine vlakana u prehrani visokoproduktivnih krmača
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Perić, Dejan, Marković, Radmila, Radulović, Stamen, Kovač, Ana Marija, Šefer, Dragan, Perić, Dejan, Marković, Radmila, Radulović, Stamen, Kovač, Ana Marija, and Šefer, Dragan
- Abstract
Vlakna u hranidbi svinja tradicionalno se smatraju energetskim razrjeđivačem za potpune smjese. U novije vrijeme se vlakna iz različitih krmiva koriste u hranidbi suprasnih i dojnih krmača s ciljem ublažavanja osjećaja gladi i sprječavanja konstipacije tijekom graviditeta uz ograničenu energetsku vrijednost obroka kako bi se povećao broj živorođene prasadi po leglu. Međutim, dijetalna vlakna su skupina ugljikohidrata sa svojstvima koja variraju ovisno o botaničkom podrijetlu vlakana, tehnici prerade i drugim čimbenicima koji ovise o krmači kao što su dob, fiziološko stanje, količina unosa hrane i sastav probavne mikrobiote. Međutim, korištenjem suvremene analitike i preciznih formulacija, moguće je dijetalnim vlaknima postići pozitivne učinke s aspekta reproduktivne sposobnosti, ali i dobrobiti krmača. Uz već utvrđene učinke upotrebe vlakana, potrebno je utvrditi koja su svojstva dijetalnih vlakana najučinkovitija u izazivanju promjena u endokrinom sustavu i folikularnoj tekućini jajnika, kako bi se postigao krajnji cilj preživljavanja embrija i otpornosti potomstva. Znanstveno istraživanje usmjereno je na temu korištenja naprednih tehnika za karakterizaciju komponenti dijetalnih vlakana.
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- 2023
29. Prevention of mycotoxins’ effects — from field to table
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Perić, Dejan, Marković, Radmila, Radulović, Stamen, Grdović, Svetlana, Jovanović, Dragoljub, Šefer, Dragan, Perić, Dejan, Marković, Radmila, Radulović, Stamen, Grdović, Svetlana, Jovanović, Dragoljub, and Šefer, Dragan
- Abstract
It is assumed that mycotoxins have been present in feed and food since the beginning of eukaryotic fungi’s life on Earth. With the recognition of the symptoms of the first intoxications, the so‑called mycotoxicosis, there was a desire to find strategies in the fight against secondary metabolites of different types of fungi. The mycotoxins that most commonly contaminate feed are aflatoxin B1 (AFB1), deoxynivalenol (DON), zearalenone (ZEN) and fumonisin B1 (FB1). These mycotoxins can primarily cause hepatotoxicity, immunotoxicity, neurotoxicity and nephrotoxicity, and consequently cause adverse effects on animal health and performance. Today, in the 21st century, the need to find a multidisciplinary and integrated plan in the fight against mycotoxins has grown with the realization that mycotoxins cause large‑scale damage in livestock. Physical, chemical, biological and nutritional strategies have been developed to combat mycotoxins in the feed industry. Meanwhile, the use of each of these strategies achieves benefits, but also has drawbacks, including being expensive or impractical to apply on a large scale.
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- 2023
30. Efekti dodavanja različitih koncentracija Saccharomices cerevisiae u ishranu brojlera na parametre ekonomske efikasnosti tova
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Janjić, Jelena, Marković, Radmila, Šefer, Dragan, Perić, Dejan, Mirilović, Milorad, Baltić, Milan Ž., Maksimović, Željko, Janjić, Jelena, Marković, Radmila, Šefer, Dragan, Perić, Dejan, Mirilović, Milorad, Baltić, Milan Ž., and Maksimović, Željko
- Abstract
Cilj ovog istraživanja bio je da se ispita uticaj dodavanja različitih količina Saccharomyces cerevisiae u ishrani brojlera na pokazatelje ekonomske isplativosti tova. Ispitivanje je sprovedeno na 270 jednodnevnih pilića (Ross 308) u intenzivnom uzgoju u periodu od 42 dana. Brojleri su nasumično raspoređeni na jedan od tri dijetetska tretmana koji su se razlikovali u sadržaju dodatog kvasca: bez dodatnog kvasca (kontrolna grupa K); sa 0,25 g/kg dodatog kvasca (O-I grupa); i sa 0,65 g/kg dodatog kvasca (O-II grupa). Svaka eksperimentalna grupa je sadržala po 90 brojlera. Za potrebe ovog eksperimenta mereni su brojleri i utrošena hrana, a zatim je izračunata završna telesna masa, prosečan dnevni prirast i konverzija. Zdravstveno stanje brojlera u tovu je svakodnevno praćeno, a mortaliteta nije bilo. Ekonomska efikasnost proizvodnje brojlera u tovu (EPEF-European Production Efficiency Factor i EBI-European Broiler Index) izračunata je na osnovu formula. Dodavanje Saccharomyces cerevisiae u različitim količinama uticalo je na masu, prirast, potrošnju hrane i konverziju brojlera. Rezultati ovog istraživanja su pokazali da je ishrana sa dodatkom 0,25 g/kg kvasca (O-I grupa) rezultirala statistički značajno boljim (p<0,05) proizvodnim rezltatima (body weight, average daily gain, food coversion ratio) brojlera nego u grupi hranjenoj samo osnovnom ishranom, odnosno grupi hranjenoj sa 0,65 g/kg kvasca. Statistički značajno veće (p<0,05) vrednosti EPEF i EBI zabeležene su u grupi brojlera koje su hranjene uz dodatak 0,25 g/kg kvasca (O-I grupa) u odnosu na kontrolnu grupu i grupu koja je u hrani dobijala 0,65 g/kg kvasca (O-II grupa). Stoga je adekvatna doza S. cerevisiae u ishrani iznosila 0,25 g/kg kvasca, dok veća doza živog kvasca u ishrani brojlera (0,65 g/kg) nije postigla bolje rezultate.
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- 2023
31. Restriktivna ishrana brojlera- uticaj na proizvodne rezultate i kvalitet mesa
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Radulović, Stamen, Jokić, Živan, Šefer, Dragan, Marković, Radmila, Petrujkić, Branko, Perić, Dejan, Ivetić, Aleksandra, Radulović, Stamen, Jokić, Živan, Šefer, Dragan, Marković, Radmila, Petrujkić, Branko, Perić, Dejan, and Ivetić, Aleksandra
- Abstract
U savremenoj živinarskoj proizvodnji koriste se brojni programi kojima se “namerno” izaziva ograničavanje rasta u određenom periodu, nakon čega životinja ispoljava ubrzani rast. Pored poboljšanja intenziteta porasta, na ovaj način mogu se ostvariti i drugi efekti, poput poboljšanja konverzije hrane, manjeg deponovanja masnog tkiva u telu životinje i smanjenja ukupnih troškova proizvodnje. Novija istraživanja potvrdila su i njihov pozitivan uticaj u kontroli nastanka pojedinih metaboličkih poremećaja (ascites, sindrom iznenadne smrti i tibijalna dishondroplazija). Najčešća tehnika za ograničavanje rasta brojlera predstavlja kontrolisano smanjenje unosa hrane tokom ranog perioda tova. To se postiže primenom različitih programa kvantitativne i kvalitativne restrikcije unosa hrane, odnosno hranljivih materija. Bez obzira na vrstu primenjenog programa uvek treba biti veoma oprezan, s obzirom da veliki broj faktora utiče na sposobnost jedinke da ispolji kompenzatorni rast i ostvari dobre proizvodne rezultate. Pri tome je posebno važno pronaći optimalan odnos između intenziteta i dužine trajanja ograničenog unosa hrane. Takođe, treba uzeti u obzir da, ukoliko se primenom određenog programa restrikcije ne ostvare uvek zadovoljavajući efekti u pogledu ostvarenih proizvodnih rezultata, ne treba ih odmah odbaciti kao neefikasne. Naime, potrebno je razmotriti njihovu ekonomsku isplativost, odnosno utvrditi da li tržišna cena dobijenog proizvoda (živinskog mesa) sa smanjenim sadržajem masti opravdava nižu telesnu masu brojlera ostvarenu na kraju tova.
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- 2023
32. Kvasac u ishrani monogastričnih životinja
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Marković, Radmila, Perić, Dejan, Maksimović, Željko, Grdović, Svetlana, Šefer, Dragan, Marković, Radmila, Perić, Dejan, Maksimović, Željko, Grdović, Svetlana, and Šefer, Dragan
- Abstract
Kvasac predstavlja nutritivno vredno hranivo koje je bogat izvor proteina visoke biološke vrednosti, kompleksa vitamina B, minerala u tragovima i mnogih drugih korisnih materija. Uglavnom je u upotrebi stočni i pivski kvasac. Suvi stočni kvasac dobija se gajenjem gljivica kvasca (Torula utilisili Saccharomyces species) na različitim podlogama (melasa, celuloza). Ovakav kvasac sadrži 40-60% sirovih proteina visoke biološke vrednosti i svarljivosti. Od esencijalnih aminokiselina bogat je lizinom (3,47%), a sumpornih aminokiselina ima samo 1,14%, što ga razlikuje od animalnih i nekih biljnih proteinskih hraniva. Najbogatiji je izvor vitamina B kompleksa od svih hraniva. Energetska vrednost suvog stočnog kvasca je 10,1 MJ/kg hrane. Obično se koristi u ishrani svinja i živine u količini od 1-7% u smeši. Suvi pivski kvasac se dobija sušenjem svežeg pivskog kvasca nakon filtracije pivske čorbe fermentisane kvaščevim gljivicama (Saccharomyces species). Ovakav kvasac sadrži 40-50% proteina visoke biološke vrednosti i svarljivosti. Energetska vrednost suvog pivskog kvasca je 7,7 MJ/kg hrane. Pored ovoga, u hranu za životinje mogu se dodati i žive ćelije kvasca (Saccharomices cerevisiae) (Live Yeast Cells-LYC) i njihov značaj je višestruk. Žive ćelije kvasca spadaju u grupu potentnih mikroorganizama koji se koriste kao dodatak u hrani za životinje i predstavljaju alternativu za antibiotike koji su se donedavno učestalo koristili u ishrani životinja kao stimulatori rasta. Za ulogu kvasca kao promotera rasta najzaslužniji je mananoligosaharid, izolovan iz spoljašnjeg ćelijskog zida kvasca (S. cerevisiae). Dokazano je da se suplementacijom obroka celim kvascem ili ćelijskim zidom kvasca u količini 1,0- 1,5 g/kg mogu poboljšati performanse rasta i prirasta mesa kod brojlera. Žive ćelije kvasca poseduju velike količine polisaharida, zajedno sa manozom i glukanima, a poznata je njihova uloga i u modulaciji imunološkog odgovora organizma u interakciji sa različitim imunokompetentnim, Yeast is a nutritionally valuable feed that is a rich source of proteins of high biological value, vitamin B complex, trace minerals and many other useful substances. Livestock and brewer's yeast are mainly used. Dry yeast as feed is obtained by growing yeast fungi (Torula utilis or Saccharomyces species) on different substrates (molasses, cellulose). This type of yeast contains 40-60% raw proteins of high biological value and digestibility. It is rich in lysine (3.47%) of essential amino acids, and only 1.14% of sulfur amino acids, which distinguishes it from animal and some vegetable protein nutrients. It is the richest source of vitamin B complex of all nutrients. The energy value of dry animal yeast is 10.1 MJ/kg of feed. It is usually used in the nutrition of pigs and poultry in the amount of 1-7% in the mixture. Dry brewer's yeast is obtained by drying fresh brewer's yeast after filtering beer broth fermented with yeast fungi (Saccharomyces species). This type of yeast contains 40-50% protein of high biological value and digestibility. The energy value of dry brewer's yeast is 7.7 MJ/kg. In addition to this, live yeast cells (Saccharomyces cerevisiae) (Live Yeast Cells-LYC) can be added to animal feed and their importance is multiple. Live yeast cells belong to a group of potent microorganisms that are used as an additive in animal feed and represent an alternative to antibiotics, which until recently were often used in animal nutrition as growth stimulators. The most important role of yeast as a growth promoter is mannanoligosaccharide, isolated from the outer cell wall of yeast (S. cerevisiae). It has been proven that supplementing the meal with whole yeast or yeast cell wall in the amount of 1.0-1.5 g/kg can improve growth and meat gain performance in broilers. Living yeast cells possess large amounts of polysaccharides, together with mannose and glucans, and their role in modulating the immune response of the organism in interaction with various immunocomp
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- 2023
33. Savremene nutritivne strategije u primeni organskih formi mikroelementa kod neprežvara
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Marković, Radmila, Perić, Dejan, Jovanović, Dragoljub, Šefer, Dragan, Marković, Radmila, Perić, Dejan, Jovanović, Dragoljub, and Šefer, Dragan
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Zbog važne uloge koju mikroelementi imaju u gotovo svim biohemijskim reakcijama u organizmu životinja u intenzivnoj proizvodnji njihovo dodavanje je obavezno, jer samo tako mogu da se obezbede u dovoljnim količinama neophodnim za optimalno zdravstveno stanje i ispoljavanje genetskog potencijala zivotinja. Upotreba mikroelemenata u ishran i životinja i in tenzivnom uzgoju danas je uglavnom bazirana na korišćenju helatnih formi mikroelemenata za razliku od do nedavno korišćenih neorganskih formi (cink oksid, bakar sulfat, itd). Poznato je da je izvor, odnosno oblik u kome se dodaje mikroelement od esencijalnog značaja i presudno utiče na iskristivost mikroelemenata, a samim tim i na proizvodne rezultate životinje. U praksi su relativno česti u industrijskoj proizvodnji, granični deficiti, koji proticu bez jasno izražene kliničke manifestacije, ali predstavljaju značajan ekonomski gubitak (loši proizvodni rezultati). Poseban problem sui uslovni deficiti, koji su česti i teže se dijagnostikuju, a izazvani su disbalansima i nepravilnim odnosima sa pojedinim hranljivim materijama, iako je mikroelement prisutan u dovoljnim količinama u hrani. Sa tehnološkim napretkom, nafročito sa razvojem biotehnologije kao nauke i njenih rešenja, nekoliko različitih oblika organskih izvora mikroelemenata ja razvijeno i godinama se uspešno koriste, uključujući komplekse microelement - aminokiselina, mikroelement – polisaharid, mikroelement – proteinat i mikroelement – metionin hidroksi analogni helat (MHAC)., Due to the critical role that microelements play in almost all biochemical reactions in the organism of animals in intensive production, their addition is mandatory, Only in this way can they be provided in sufficient quantities necessary for optimal health and the manifestation of the genetic potential of animals. The use of microelements in animal nutrition in intensive breeding today is mainly based on chelated microelements, in contrast to the inorganic forms used until recently (zinc oxide, copper sulfate, etc.). lt is known that the form in which the microelement is added is of essential importance lt has a decisive influence on the utilization of microelements and, thus, on the production results of the animal. In practice, marginal deficits are relatively common in industrial production, which occur without clearly expressed clinical manifestations, but represent a significant economic loss (poor production results). Conditional deficits are a particular problem that is frequent and difficult to diagnose. They are caused by imbalances and improper relationships with specific nutrients, even though microelements are present in sufficient quantities in feed. With technological progress, especially with the development of biotechnology as a science and its solutions, several different forms of organic sources of microelements have been developed. They have been successfully used for years, including microelement - amino acid complexes, microelement - polysaccharide, microelement - proteinate, and microelement - methionine hydroxy analog chelate (MHAC).
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- 2023
34. The content of ten elements in pig feed and manure and its relationshipwith element concentration in earthworms on swine farms
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Mitrović, Branislava, Stefanović, Srđan, Šefer, Dragan, Jovanović, Dragoljub, Ajtić, Jelena, Mitrović, Branislava, Stefanović, Srđan, Šefer, Dragan, Jovanović, Dragoljub, and Ajtić, Jelena
- Abstract
The aim of this investigation is to determine the content of ten elements, Cr, Mn, Co, Ni, Fe, Zn, As, Cu, Se, and Cd, in pig feed, manure and earthworms (Lumbricus terrestris). Samples were collected during 2015 and 2017, on four pig farms in Serbia, and analyzed for elements by inductively coupled plasma mass spectrometry. According to the mean concentrations, the elements show the following trends: Fe > Mn > Zn > Cr > Ni > Cu > Cd > Se > As > Co in monocalcium phosphate, Zn > Mn > Fe > Cu > Co > Cr > Ni > Se > As > Cd in vitamin-mineral premixes, Fe > Zn > Mn > Cu > Ni > Cr > Se > Co > As > Cd in complete feed, and Fe > Zn > Mn > Cu > Ni > Cr > Co > Se > Cd > As in pig manure. The obtained results show that monocalcium phosphate and vitamin-mineral premixes are the main source of Mn, Zn, and Fe in complete feed mixtures. The Cd concentration in one sample of monocalcium phosphate exceeds the maximum permissible level. Only one out of six investigated complete feed mixtures was in accordance with the national and EU regulations. The presence of Fe, Zn, and Mn in earthworms reflects their concentration in pig manure, but this is not noticed for Cr, Cu, Se, As, Ni, Co, and Cd.
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- 2023
35. Enrichment of Table Eggs with Selenium Through Designed Feed for Laying Hens
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Šefer, Dragan, primary, Perić, Dejan, additional, and Marković, Radmila, additional
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- 2023
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36. Live Yeast Cells in Nutrition of Monogastric Animals
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Marković, Radmila, primary, Perić, Dejan, additional, Grdović, Svetlana, additional, Jovanović, Dragoljub, additional, Šefer, Dragan, additional, Janjić, Jelena, additional, and Maksimović, Željko, additional
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- 2023
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37. Entomophagy — A Novel Option in Animal and Human Nutrition
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Nešić, Ksenija, primary, Marković, Radmila, additional, and Šefer, Dragan, additional
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- 2023
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38. Effects of Spent Mushroom Substrate on Growth Performance and Meat Characteristics of Animals
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Grdović, Svetlana, primary, Marković, Radmila, additional, Perić, Dejan, additional, and Šefer, Dragan, additional
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- 2023
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39. Prevention of Mycotoxins’ Effects — From Field to Table
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Perić, Dejan, primary, Marković, Radmila, additional, Radulović, Stamen, additional, Grdović, Svetlana, additional, Jovanović, Dragoljub, additional, and Šefer, Dragan, additional
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- 2023
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40. Isoflavones - from Biotechnology to Functional Foods
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Markovic, Radmila, Baltic, Milan Z., Pavlovic, Marija, Glisic, Milica, Radulovic, Stamen, Djordjevic, Vesna, and Sefer, Dragan
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- 2015
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41. Etarska ulja lekovitih biljaka u ishrani preživara
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Grdović, Svetlana, Perić, Dejan, Marković, Radmila, and Šefer, Dragan
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ruminants ,medicinal herbs ,methane ,etarska ulja ,methanogenesis ,metanogeneza ,metan ,essential oils ,preživari ,lekovite biljke - Abstract
Преживари доприносе повећаној емисији гасова у атмосфери што доводи до увећаног ефекта стаклене баште. Метан, кога емитују преживари, утиче на глобално загревање чак 28 пута више од угљен-диоксида. Због тога у свету влада велико интересовање за фитоадитивима који би могли да својим хемијским саставом делују на бактерије у бурагу преживара и успешно смање продукцију метана. Танини, сапонини, флавоноиди и етарска уља су секундарни метаболити биљака за које је доказано да имају потенцијал за ублажавање емисије ентеричног метана. Они делују на липидну мембрану бактерија у бурагу, повећавајући њену пермеабилност, стварајући тиме дисбаланс и лизу ћелије. Смањена концентрација метаногених бактерија омогућила би смањену метаногенезу и мању продукцију метана. Етарска уља имају повољан ефекат на организам преживара као добри антиоксиданти, антиинфламаторна једињења и антибактеријска једињења са широким спектром дејства на микроорганизме. До данас је испитан ефекат етарских уља неколико стотина ароматичних биљака на смањење продукције ентеричног метана код различитих преживара: краве, говеда, овце и козе. Најбоље ефекте показала су етарска уља ароматичних биљака које се и иначе користе у народној медицини за лечење различитих здравствених проблема код људи и животиња: бели лук (Allium sativum), тимијан (Thymus vulgaris), еукалиптус (Eucaliptus spp.), оригано (Origanum vulgare), цимет (Cinnamomum zeylanicum), нана (Mentha piperita), босиљак (Ocimum basilicum), мирта (Mirtus communis), пелин (Artemisia annua), рузмарин (Salvia rosmarinus), анис (Illicium verum), ловор (Laurus nobilis) и многе друге. Испитивања су показала да етарска уља имају важан потенцијал као регулатори ин витро ферментације бурага, минимизирајући метаногенезу и емисију метана у атмосферу. Одговарајућа доза и врста етарског уља смањили су продукцију метана и укупну производњу гасова и до 50%. Потребна су даља in vitro, али и in vivo истраживања примене етарских уља у исхрани преживара. Ruminants contribute to the increased emission of gases in the atmosphere, which leads to an increased greenhouse effect. Methane, which is emitted by ruminants, affects global warming as much as 28 times more than carbon dioxide. That is why there is great interest in the world for phytoadditives that could, with their chemical composition, act on the bacteria in the rumen's rumen and successfully reduce methane production. Tannins, saponins, flavonoids, and essential oils are secondary plant metabolites that have been shown to have the potential to mitigate enteric methane emissions. They act on the lipid membrane of bacteria in the rumen, increasing its permeability, thus creating imbalance and cell lysis. A reduced concentration of methanogenic bacteria would enable reduced methanogenesis and lower methane production. Essential oils have a beneficial effect on the ruminant organism as good antioxidants, anti-inflammatory compounds and antibacterial compounds with a wide range of effects on microorganisms. To date, the effect of essential oils of several hundred aromatic plants on the reduction of enteric methane production in various ruminants has been examined: cows, cattle, sheep and goats. The best effects were shown by the essential oils of aromatic plants that are also used in folk medicine for the treatment of various health problems in humans and animals: garlic (Allium sativum), thyme (Thymus vulgaris), eucalyptus (Eucaliptus spp.), oregano (Origanum vulgare), cinnamon (Cinnamomum zeylanicum), mint (Mentha piperita), basil (Ocimum basilicum), myrtle (Mirtus communis), wormwood (Artemisia annua), rosemary (Salvia rosmarinus), anise (Illicium verum), laurel (Laurus nobilis) and many others. Tests have shown that essential oils have important potential as regulators of in vitro rumen fermentation, minimizing methanogenesis and methane emission into the atmosphere. The appropriate dose and type of essential oil reduced methane production and total gas production by up to 50%. Further in vitro and in vivo studies of the use of essential oils in ruminant nutrition are needed Zbornik radova i kratkih sadržaja
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- 2023
42. Effects of Fish Meal Replacement by Red Earthworm (Lumbricus Rubellus) Meal on Broilers’ Performance and Health / Uticaj Supstitucije Ribljeg Brašna Brašnom Kalifornijske Gliste (Lumbricus Rubellus) Na Proizvodne Rezultate I Zdravstveno Stanje Brojlera
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Janković Ljiljana, Radenković-Damnjanović Brana, Vučinić Marijana, Šefer Dragan, Teodorović Radislava, Đorđević Milutin, and Radisavljević Katarina
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broilers ,earthworm meal ,nutrition ,performance ,Veterinary medicine ,SF600-1100 - Abstract
Ispitivana je hranljiva vrednost glista (Lumbricus rubellus) i brašna dobijenog od njih, kao i uticaj ishrane smešama u kojima je izvršena zamena ribljeg brašna brašnom od glista ili svežim glistama, na zdravstveno stanje i proizvodne rezultate brojlera. Ogled izveden na četiri grupe brojlera Hybro G provenijence trajao je 42 dana. Brojleri kontrolne grupe dobijali su hranu standardnog sirovinskog i hemijskog sastava. U prvoj i drugoj eksperimentalnoj grupi riblje brašno u smeši za ishranu bilo je zamenjeno brašnom od glista, i to u količini od 50% u prvoj i 100% u drugoj. Treća grupa hranjena je smešama iz kojih je potpuno isključeno riblje brašno, uz dodatak svežih glista ad libitum. Rezultati hemijskih analiza pokazali su da brašno od glista sadrži 41,42% proteina (računato na SM) i zadovoljavajuću količinu amino kiselina. Na osnovu ispitivanja sadržaja teških metala i bakterioloških analiza, utvrđeno je da brašno dehidrovanih glista i sveže gliste predstavljaju higijenski ispravno hranivo i da ne sadrži teške metale i štetne mikroorganizme. Analizom proizvodnih rezultata dobijenih u ogledu kao celini nije utvrđena statistički značajna razlika između grupa (p>0.05). Dobijeni rezultati su pokazali da zamena ribljeg brašna u ishrani brojlera brašnom dobijenim od dehidrovanih glista predstavlja realnu mogućnost
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- 2015
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43. The application of biotechnology in animal nutrition
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Šefer Dragan, Marković Radmila, Nedeljković-Trailović Jelena, Petrujkić Branko, Radulović Stamen, and Grdović Svetlana
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biotechnology ,intensive farming ,nutrition ,Veterinary medicine ,SF600-1100 - Abstract
Animal food has to incorporate multiple objectives, ie. it should provide good animal health, good production and reproductive performance, reduce pollution of the environment as well as have the impact on food of animal origin, by supplying it, in addition to basic nutrients, with certain useful substances that can act preventively on the occurrence of various diseases in humans in modern living conditions. This complex task implies the application of scientific knowledge concerning biotechnology in the field of animal feed production, and also includes the use of specific nutrients that are the result of the latest developments in specific disciplines such as molecular biology and genetic engineering. As a result of researches in these areas there were created some varieties of cereals and legumes with improved nutritional properties. On the other hand, obtaining a safe food of animal origin product imposes the use of substances of natural origin (such as probiotics, prebiotics, phytobiotics, enzymes, chelating forms ..), which provide better digestibility and more complete utilization of certain nutrients from the feedstuff. In this way, the quantity of undigested substances are significantly reduced as well as soil and the atmosphere pollution. The use of specific additives in animal nutrition resulting from biotechnological research is most frequent when a problem concerning certain level of production or animal health has to be overcome. This implies a group of non-nutritional ingredients which are aimed to regulate the digestive tract microflora, pH, weight gain, as well as to modify metabolic processes etc.
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- 2015
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44. The use of phytobiotics in growth stimulation of weaned pigs
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Radulović Stamen, Marković Radmila, Jakić-Dimić Dobrila, and Šefer Dragan
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phytobiotics ,pigs ,growth promoters ,Veterinary medicine ,SF600-1100 - Abstract
Phytogene feed additives (phytobiotics) are plant origin compounds used in animal nutrition in order to improve their productivity by improving the production performance of animals, feed properties and the quality of food of animal origin. These additives stimulate animal growth by using their natural and physiological potentials and mechanisms providing conditions for the realization of the genetically projected production volumes. Data on the use of phytobiotics as growth stimulators are incomplete and often very contradictory, especially those related to their impact on the health and performance of weaned pigs. Given the relevance and importance of these issues the feeding trial was organized by the group-control system. The experiment lasted for 40 days and it was divided into two phases of 20 days each. Trial was conducted on 24 piglets, F1 generation of Swedish Landrace and Pietrain, weaned from sows at the age of 35 days. Tests were carried out on piglets, with an average body weight of 8.61±1.59 kg, which were subjected to one of the two feeding treatments immediately after weaning. The control group was fed with a mixture without growth promoters, while the experimental group received a diet containing preparation of phytobiotic (Enviva EO 101, Danisco Animal Nutrition) in the amount recommended by the manufacturer (0.1 kg/t). The mixtures for piglets nutrition were formulated in accordance with the recommendations of the NRC (1998), and AEC (1993) and they met the nutritional requirements completely. During the experiment, there was no disturbance of health and/or the manifestation of clinical signs of disease. The control group, fed with the diet without added growth stimulators, achieved body weight (25.32±6.31 kg), average daily gain (0.42±0.12 kg), consumption (0.89 kg) and feed conversion (2.119 ) normal for a given race, age and housing conditions. The use of preparation of phytobiotics as growth promoters, led to better production results in regard to the control group, which was based on higher body weight (27.19±4.77 kg), higher average daily gain (0.46±0.09 kg) and better feed conversion (2.043). The use of phytobiotic, as an alternative option in growth stimulation of weaned pigs, has its nutritive, medical and economic justification.
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- 2015
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45. Effects of Adding Different Dosages of Saccharomyces cerevisiae in Diet on Growth Performance, Carcass Characteristics, Intestinal Morphology, and Gut Microflora of Broilers
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Maksimović, Željko, Starčević, Marija, Šefer, Dragan, Janjić, Jelena, Radovanović, Anita, Radulović, Stamen, Perić, Dejan, Marković, Radmila, Maksimović, Željko, Starčević, Marija, Šefer, Dragan, Janjić, Jelena, Radovanović, Anita, Radulović, Stamen, Perić, Dejan, and Marković, Radmila
- Abstract
Th e aim of this study was to evaluate the eff ect of adding diff erent dosages of live yeast (Saccharomyces cerevisiae) in diet on growth performance, carcass characteristics, intestinal morphology, and gut microfl ora of broilers. Th e study was conducted on 270 oneday old chickens (Ross 308) during a 42-day period. Broilers were randomly allocated to one of three dietary treatments that diff ered in the content of added yeast: no additional yeast; with 0.25 g/kg; and with 0.65 g/kg of added yeast. Each experimental group contained 90 animals. Th e results from our study showed that diet supplemented with 0.25 g/kg of yeast resulted in better growth performance and carcass quality (P<0.05), improved intestinal morphology (P<0.001), higher development of beneficial microfl ora (Lactobacillus spp.) (P<0.01), and reduction of pathogenic bacteria (Escherichia coli) in guts of broilers than in the group fed only with the basic diet (P<0.05). On the other hand, the group with the highest inclusion of yeast in diet (0.65 g/kg) achieved similar results for the examined parameters as did the group with no added yeast. Th erefore, the adequate dose of S. cerevisiae in diet was 0.25 g/kg of yeast, while higher dose of live yeast in broiler diet (0.65 g/kg) did not achieve better results.
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- 2022
46. Upotreba enzima u povećanju svarljivosti hrane i zaštiti životne sredine
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Perić, Dejan, Marković, Radmila, Radulović, Stamen, Grdović, Svetlana, Jovanović, Dragoljub, Šefer, Dragan, Perić, Dejan, Marković, Radmila, Radulović, Stamen, Grdović, Svetlana, Jovanović, Dragoljub, and Šefer, Dragan
- Abstract
Potražnja za proteinima animalnog porekla nastavlja da raste sa povećanjem broja ljudi na planeti. Zbog toga je pred naučnu i stručnu javnost postavljen jasan zadatak, a to je kontinuirana dostupnost mesa, mleka, jaja i ribe. Rast sektora intenzivnog stočarstva postavlja ogromne zahteve za svetske prirodne resurse i kao što se na- široko izveštava, dovešće do povećanja emisije gasova i efekta staklene bašte, kao i do većeg uticaja na životnu sredinu, odvodeći naše sisteme ishrane daleko izvan granica planete. Primarni kritični ekološki faktori su: zapremina stajnjaka, sadržaj azota i fosfora u stajnjaku, proizvodnja metana i miris. Održivost proizvodnje animalnih proteina je sada glavni i centralni zadatak nametnut čovečanstvu, a pozivi na promene su široko rasprostranjeni. Postoje raličiti načini ublažavanja štetnih efekata stočarstva na životnu sredinu, a jedan od najsavremenijih je industrijska primena enzima u hrani za životinje. Enzimi, koji se svrstavaju u biološke katalizatore su proteini sposobni da ubrzaju brzinu hemijskih reakcija neophodnih za pravilno funkcionisanje svih ćelija. Zbog svoje raznolikosti, specifičnosti i katalitičkog kapaciteta, oni su široko prihvaćeni od strane naučne i industrijske zajednice. Mada su odavno poznati u nauci, enzimi se. kao funkcionalni dodaci, u industriji hrane za životinje koriste tek poslednjih nekoliko decenija. Razlikujemo endogene enzime, koji se stvaraju u digestivnom sistemu, biljne enzime iz različitih biljnih hraniva i egzogene enzime koje proizvode različite bakterije i plesni. Cilj dodavanja enzima je dopuna aktivnosti endogenih enzima životinja, otklanjanje antinutritivnih materija (glukani, fitati) iz pojedinih hraniva, povećanje energetske i hranljive vrednost hraniva na osnovu veće dostupnosti pojedinih hranljivih materija za resorpciju, kao i smanjivanje izlučivanja neiskorišćenih hranljivih materija u spoljašnju sredinu što se uklapa u koncept očuvanja životne sredine. Potraga za novim izvorima dobijanj
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- 2022
47. Upotreba nutritivnog dodatka „Eubiotik“ u kontroli emisije amonijaka i ugljen dioksida na komercijalnim živinarskim farmama za tov brojlera
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Šefer, Dragan, Marković, Radmila, Grdović, Svetlana, Radulović, Stamen, Jovanović, Dragoljub, Makivić, Lazar, Perić, Dejan, Šefer, Dragan, Marković, Radmila, Grdović, Svetlana, Radulović, Stamen, Jovanović, Dragoljub, Makivić, Lazar, and Perić, Dejan
- Abstract
Živinarska proizvodnja je primer masovne stočarske proizvodnje, tako da intenzivna proizvodnja tovnih brojlera podrazumeva uzgajanje brojlera na farmama kapaciteta od 5 000 pa do 50 000 jedinki ili više, pri gustini od 0,06 m2 po ptici. Moderne živinarske farme konstruisane su sa zadatkom smanjenja gubitka toplote, odnosno poboljšanja energetske efikasnosti, što vrlo često, u kombinaciji sa smanjenim nivoom ventilacije može dovesti do povišenog nivoa amonijaka (NH3), ugljen dioksida (CO2), ali i drugih zagađivača vazduha i na taj način negativno uticati na zdravlje i produktivnost životinja. Na brzinu emisije gasova utiču mnogi faktori, kao što su: sastav hrane i efikasnost korišćenja hrane (konverzjia), kvalitet prostirke i mikroklimatski uslovi na farmi. Prostirka na intenzivnim živinarskim farmama obično sadrži 4 do 6 procenata azota, od čega je veći deo u NH3 ili NH4+ obliku. Mešavina prostirke i stajnjaka predstavlja skladište azota koji se pod odgovarajućim uslovima oslobađa u vidu amonijaka. Sa druge strane, glavni izvor ugljen-dioksida u stočarstvu je disanje životinja tako da postoji povezanost između nivoa metabolizma životinja i proizvodnje CO2 na farmama. Proizvodnja ugljen-dioksida kod ptica je proporcionalna njihovoj metaboličkoj proizvodnji toplote, a time i metaboličkoj telesnoj masi ptice, na koju utiču temperatura i aktivnost. Cilj istraživanja sprovedenog na 17 000 brojlera u tovu je bio da se ispita uticaj nutritivnog dodatka Eubiotika dodatog u hranu za brojlere na emisiju NH3 i CO2. Vrednosti emisije NH3 i CO2 u objektu za uzgoj tovnih brojlera koji su u hrani dobijali Eubiotik su numerički manje, što se može objasniti boljom svarljivošću osnovnih hranljivih materija, pre svega proteina prisutnih u hrani
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- 2022
48. Advantages of sodium butyrate in weaned piglet diet
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Đorđević, Jasna, Baltić, Branislav, Glišić, Milica, Bošković, Marija, Šefer, Dragan, Radulović, Stamen, Radovanović, Anita, Perić, Dejan, Peurača, Mile, Marković, Radmila, Đorđević, Jasna, Baltić, Branislav, Glišić, Milica, Bošković, Marija, Šefer, Dragan, Radulović, Stamen, Radovanović, Anita, Perić, Dejan, Peurača, Mile, and Marković, Radmila
- Abstract
The aim was to examine production performance, carcass characteristics, and intestinal histomorphology of weaned piglets (28-to 54-day-old) fed diet with 3 or 5 g of sodium butyrate per kg of diet (group II and III). Groups II and III had higher final live weight and total weight gain. The feed to gain ratio was the best in group I. The highest carcass yield was of group III. Significant differences (P<0.05) were observed in Escherischia coli counts in small intestine between control (I) and experimental groups (II and III), and in cecum between control (I) and experimental group II. There were significant differences (P<0.05) between all groups for the intestine length, intestine weight, and both height and width of the ileal villus. The highest villus height/crypt depth ratio of jejunum occurred in group II piglets, while the highest villus height/crypt depth ratio of ileum was in piglets from group III. The significant correlations were determined between amount of sodium butyrate and final live weight, intestinal length, intestinal weight, jejunal and ileal crypt depth, and ileal villus widths.
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- 2022
49. Upotreba etarskih ulja u ishrani preživara sa ciljem zaštite životne sredine
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Grdović, Svetlana, Marković, Radmila, Radulović, Stamen, Perić, Dejan, Šefer, Dragan, Grdović, Svetlana, Marković, Radmila, Radulović, Stamen, Perić, Dejan, and Šefer, Dragan
- Abstract
Poslednjih godina, u svetu vlada veliko interesovanje za smenjenjem emisije metana nastalog metanogenezom u rumenu preživara. Zbog toga su dodaci hrani, koji mogu da modifikuju fermentaciju u buragu od velikog interesa. Antibiotici, kao dodaci hrani za životinje, su se pokazali kao veoma efikasni u smanjenju proizvodnje metana, ali je pojava otpornih mikroorganizama i rezidua u animalnim proizvodima, dovela do zabrane njihove primene. Postoji izuzetno veliko interesovanje za istraživanjima različitih sekundarnih metabolita biljaka, kao što su etarska ulja, tanini, saponini i flavonoidi, koji se mogu koristiti kao prirodni modifikatori aktivnosti mikroorganizama buraga. Kao bezbedni dodaci u hrani za životinje, sa ciljem smanjenja emisije metana, prepoznata su etarska ulja i na tu činjenicu ukazuje veliki broj saopštenja i naučnih radova. Ovde ćemo prikazati rezultate nekoliko istraživanja te vrste., In recent years, there has been a great interest in the world for changing the emission of methane produced by the process of methanogenesis in the rumen of ruminants. Therefore, feed additives that can modify fermentation in the rumen are of great interest. Antibiotics, as additives to animal feed, have proven to be very effective in reducing methane production, but the appearance of resistant microorganisms and residues in animal products has led to their ban. Therefore, there is a great interest in the research of various secondary metabolites of plants, such as essential oils, tannins, saponins and flavonoids, which can be used as natural modifiers of rumen microorganisms. Essential oils are recognized as safe additives in animal feed with the aim of reducing methane emissions, as indicated by a large number of announcements and scientific works. Here we will present some research.
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- 2022
50. Addition of live yeast cells in broiler nutrition
- Author
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Marković, Radmila, Perić, Dejan, Drljačić, Aleksandar, Šefer, Dragan, Shivani, Katoch, Maksimović, Željko, Marković, Radmila, Perić, Dejan, Drljačić, Aleksandar, Šefer, Dragan, Shivani, Katoch, and Maksimović, Željko
- Published
- 2022
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