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Production of organic, biologically valuable food is a trend in the World today, and in our country it can be successfully realized in production of meat and milk from small ruminants, sheep and goats in hilly-mountainous region. Namely, grasslands in these regions are well preserved from the utilization of mineral fertilizers and chemical preparations for plant protection, therefore production of healthy food is still possible with minimum investments. The quality of plant mass is very important, i.e. presence of high quality plant species in the grassland, as well as possibility for increase of their percentage in the grassland. For this purpose, research was carried out and plant associations most present on Stara Planina Mountain on altitude of 650 to 1200 m were analyzed from the aspect of phytocenology. On these locations recordings were made and samples were taken for analysis in the period 2002-2005 and in year 2008. Total of 8 associations were analyzed, and two of them Agrostietum vulgarae Z. Pavl. 1955. sensu lato. and Festucetum vallesiacae Borisavljević 1956. occurred repeatedly on several location and different time interval of analysis. Beside mentioned two associations the following were also analyzed: Arrhenatheretum elatioris Br.-Bl. 1925.senso lato, Festuco-Chrysopogonetum grylli Ranđ. 1977., Danthonietum calycinae Cinc. et Kojić 1958., Medicago falcata-Festucetum rubrae, Trifolio campestre- Agrostietum vulgaris i Festuco vallesiacae-Agrostieutum vulgaris Danon et Blaž.1978 on 17 locations. Number of species in analyzed associations was from 34 to 77. Beside number of plant species also their share categorized in categories of high qualiity grasses, high quality leguminous plants and useful species from other families, as well as harmful i.e. weed species. Main quality parameters were established in samples from all associations. Objective of analyses of natural grasslands was to establish share of high quality plant species, which is reflected directly through production and quality of plant mass grazed by small ruminants, sheep and goats. Proizvodnja organske, biološki vredne hrane je danas svetski trend, a koja se u našoj zemlji uspešno može ostvariti u proizvodnji mesa i mleka sitnih preživara, ovaca i koza u brdsko-planinskom području. Naime, travnjaci u ovim područjima su još uvek sačuvani od upotrebe mineralnih đubriva i hemijskih sredstava za zaštitu bilja pa je proizvodnja zdrave hrane još uvek moguća uz minimalna ulaganja. Zbog toga, izuzetno je značajan kvalitet biljne mase, odnosno zastupljenost kvalitetnih biljnih vrsta u travnjaku, kao i mogućnosti za povećanje njihovog procentualnog učešća u travnjaku. U tom cilju obavljena su istraživanja i analizirane, s aspekta fitocenologije, najrasprostranjenije biljne zajednice na Staroj planini na nadmorskoj visini od 650-1200 m. Na ovim lokalitetima snimci su pravljeni i uzimani uzorci za analizu 2002-2005 i 2008. godine. Analizirano je 8 asocijacija, s tim što su se dve asocijacije, Agrostietum vulgarae Z. Pavl. 1955. sensu lato. i Festucetum vallesiacae Borisavljević 1956. ponavljale kako na različitim lokalitetima tako i u vremenskom intervalu analiziranja. Pored ovih analizirane su i asocijacije: Arrhenatheretum elatioris Br.-Bl. 1925.senso lato, Festuco-Chrysopogonetum grylli Ranđ. 1977., Danthonietum calycinae Cinc. et Kojić 1958., Medicago falcata-Festucetum rubrae, Trifolio campestre-Agrostietum vulgaris i Festuco vallesiacae-Agrostieutum vulgaris Danon et Blaž. 1978. na 17 lokaliteta. Broj vrsta u analiziranim zajednicama je 34-77. Analizirano je pored brojnosti i pokrovnosti biljnih vrsta i njihovo učešće svrstanih u kategorije kvalitetnih trava, kvalitetnih leguminoza i korisnih vrsta drugih familija, kao i štetnih, odnosno korovskih vrsta. U uzorcima iz svih zajednica utvrđeni su osnovni parametri kvaliteta. Cilj ovih analiza prirodnih travnjaka je utvrđivanje učešća kvalitetnih vrsta biljaka, koje se direktno odražavaju kroz produkciju i kvalitet biljne mase koju ispasaju sitni preživari, koze i ovce.

Investigation was carried out on the territory of Stara Planina mountain, Pirot mnucipality, in villages: Dojkinci, Brlog, Jelovica, Visočka Ržana and Rsovci, from 700-1200 m above sea level, on farms with greater number of sheep (over 100 heads) which in regard to the breeds structure were mainly Pirot pramenka breed, and insignificant number of heads were crosses of Pirot Pramenka and Württemberg. Research included analysis of pasture from the aspect of floristic and chemical composition. In regard to botanical composition it was concluded that grasses were present with approx. 50%, leguminous plants with 15% , and herbaceous plants with 35%. Share of crude protein in investigated samples varied from 4,81 to 13,57%, and of crude fibre from 20,67 to 37,17%. Yield of forage on pastures was from 0,6 to 2,0 t/ha. Low yield as well as unsatisfactory floristic composition of pastures resulted from poor care, especially lack of fertilization and their unplanned and inefficient use which was reflected on milk yield of sheep, in lactation of 180 days it was from 69,16-70,40 kg. Improvement of botanical composition can be achieved by application of fertilizers since in this way the share of useful grasses (Poaceae) and leguminous plants (Fabaceae) is increased, and share of herbaceous plants in total mass of pasture is reduced, which represents one of our goals in research on the Pirot territory of Stara Planina mountain. In order to preserve the quality and phytodiversity of plant species we suggested as optimal way of pasture utilization, combination of pasture and cutting system. In winter nutrition period, on investigated locations, introduction of haylage in nutrition of sheep used for production of milk is recommended, because of its higher nutritive value compared to hay. U radu je analizirano sadašnje stanje u proizvodnji ovčijeg mleka (sa aspekta proizvodnje stočne hrane i ishrane) na području pirotskog dela Stare planine. Rezultati ispitivanja su pokazali da je postojeći sistem proizvodnje ekstenzivan i nezadovoljavajući obzirom na agrarno-geografski potencijal. U cilju prevazilaženja takvog stanja, naše aktivnosti su bile usmerene na uvođenje novih tehnoloških postupaka u ishrani ovaca kao što su: promena florističkog sastava pašnjaka pod uticajem đubrenja, planska eksploatacija pašnjaka i korišćenje senaže u ishrani ovaca za proizvodnju mleka.

Meadows and pastures are important resource of livestock feeds in mountain regions and all plant species on them don’t have same value as livestock feeds. From aspect of food value for livestock all species fundamentally can distribute as useful and harmful plants. In paper are represent two plant associations of Stara Planina Mountain Festucetum vallesiacae and Agrostietum vulgarae. In this associations, besides useful plants, are defined, harmful plant species, there present in associations and all of it in aim of ascertainment measures for their removal or reduction from sward. Group of harmful plants is segmented on three subcategory: bed and worthless plants, harmful and poorly poisons and very poisons plants. Association Festucetum vallesiacae count 75 plant species and of that, category bed and worthless plants belong 26 plants or 34.7 g kg-1, category harmful and poorly poisons belong 8 or 10.6 g kg-1, while category very poisons plants default. Association Agrostietum vulgare count 47 plant species and of that category bed and worthless plants belong 17 or 36.17 g kg-1, category harmful and poorly poisons just one plant or 2.13 g kg-1 and category very poisons plants default too. Livade i pašnjaci su bitni izvori stočne hrane u planinskim predelima. Odlikuju se velikom raznolikošću biljnih vrsta i zajednica. Međutim sve biljne vrste na travnjacima nisu podjednake vrednosti za ishranu stoke. Sa aspekta hranljive vrednosti sve vrste u osnovi se mogu podeliti na korisne i štetne. U radu su prikazane dve biljne zajednice Stare planine Festucetum vallesiacae i Agrostietum vulgare. U njim su definisane štetne biljne vrste, njihovo procentualno učešće, sa ciljem iznalaženja mera za njihovo procentualno smanjenje ili uklanjanje sa travnjaka. Grupa štetnih biljaka podeljena je na tri podkategorije: loše i bezvredne biljne vrste, škodljive i slabo otrovne i vrlo otrovne. Asocijacija Festicetum vallesiacae broji ukupno 77 biljnih vrsta od toga kategoriji lošim i bezvrednim pripada 25 biljaka odnosno 32,46%, škodljivim i slabo otrovnim 8 odnosno 10,38%, dok su vrlo otrovne izostale. Asocijacija Agrostietum vulgare broji ukupno 47 biljnih vrsta od toga 17 ili 36,17 % pripada lošim i bezvrednim, od škodljivih i slabo otrovnih utvrđena je samo jedna ili 2,13 % dok vrlo otrovnih nije bilo.