Search

The research was carried out in the alpaca production unit of the Tomas Peasant Community, of the Lima Region, with the aim of identifying the floristic component of the pasture of a wetland area in the dry season of the year and the species that were most consumed by alpacas. Previously, the floristic inventory of 5 hectares of pasture was carried out and 10 mother alpacas and 10 tuis alpacas were assigned. During the study period, stool samples were taken to evaluate the diet by the microhistological method. The chemical components of the six main species of grasses most consumed were analyzed. In the initial inventory 36 species were found, of which the most consumed were 10 that made up approximately 80% of the diet. Chemical analysis shows a crude fiber content in a range between 66,23 to 77,24%, crude protein between 2.49 to 5,21% and vitamin A between 0,08 to 0,37 mg / 100g. The contribution of the present is to identify the species of pasture most consumed by alpacas tuis and mothers, in order to take care in their conservation.

Se evaluó el efecto del uso de compost de guano de pollos (CGP) en niveles de (T1) 0, (T2) 10 y (T3) 20 t/ha sobre el rendimiento de forraje verde (FV), materia seca (MS), altura de planta (AP) y proteína total (PT) de la alfalfa en una pradera de Huancayo (Junín, Perú). El abonamiento se hizo al primer día del estudio y al inicio de la semana 6. El primer corte se hizo a los 42 días del primer abonamiento y el segundo corte a los 35 días del segundo abonamiento. Los rendimientos al segundo corte de FV en T1, T2 y T3 fueron de 18.6, 23.5 y 26.8 t/ha (p, The effect of using chicken manure compost (CGP) at levels of (T1) 0, (T2) 10 and (T3) 20 t/ha, on green forage yield (GF), dry matter (DM), plant height (PH) and total protein (TP) of alfalfa, in a pasture area of Huancayo (Junín, Peru) was evaluated. The fertilization was done on the first day of the study and at the beginning of week 6. The first cut was done at 42 days of the first fertilization and the second at 35 days of the second fertilization. The yields at the second cut of GF in T1, T2 and T3 were 18.6, 23.5 and 26.8 t/ha (p

La investigación se realizó en una granja ubicada en la sierra central del Perú, a 3270 msnm, para determinar el efecto del uso de niveles de líquido ruminal en el agua de bebida de pollos broilers. Se utilizaron 200 pollos Cobb desde el primer día de edad. Las aves fueron distribuidas en cuatro grupos de 50, en iguales proporciones de machos y hembras. Los tratamientos fueron: T1: Agua de bebida sola (control); T2: 87.5% de agua de bebida + 12.5% de líquido ruminal; T3: 75% de agua de bebida + 25% de líquido ruminal; T4: 62.5% de agua de bebida + 37.5% de líquido ruminal. Los pollos fueron alimentados con un concentrado de ‘inicio’ durante tres semanas. La inclusión de líquido ruminal en el agua de bebida mejoró la ganancia de peso y la conversión alimenticia (p, The study was carried out in a farm located in the central highlands of Peru, at 3270 m above the sea level, to determine the effect of the use of three ruminal fluid levels in the drinking water of broilers. Two hundred Cobb chickens were used from the first day of age. The chicks were distributed in four groups of 50, in equal proportions of males and females. The treatments were: T1: drinking water alone (control); T2: 87.5% drinking water + 12.5% ruminal fluid; T3: 75% drinking water + 25% ruminal fluid; T4: 62.5% drinking water + 37.5% ruminal fluid. The chicks were fed with a starter diet for three weeks. The inclusion of ruminal fluid in drinking water improved weight gain and feed conversion (p

Con el objetivo de evaluar la calidad nutricional del rastrojo de maca (Lepidium peruvianum Chacón) proveniente de la trilla para la colección de la semilla botánica, en la provincia de Junín (4000 msnm), Perú, se determinó la composición química proximal, los coeficientes de digestibilidad, el contenido de nutrientes digestibles totales, el consumo voluntario y la ingesta proteica del rastrojo picado de maca. Se utilizaron 4 cuyes machos de 4 meses de edad de la raza Wanka dispuestos en jaulas metabólicas que permiten colectar heces libres de orina. Los contenidos de humedad (H), materia seca (MS), proteína total (PT), extracto etéreo (EE), fibra cruda (FC), extracto libre de nitrógeno (ELN) y ceniza del rastrojo de maca fueron 11.30, 88.70, 6.97, 3.58, 36.35, 44.53 y8.58%, respectivamente; los coeficientes de digestibilidad de la MS, PT, EE, FC, ELN, materia orgánica (MO) y nutrientes digestibles totales (NDT) del rastrojo de la maca fueron 74.79, 68.00, 75.27, 71.78, 77.08, 74.21 y 71.21%, respectivamente. Los consumos promedio de rastrojo fresco de maca por cuy/día y como porcentaje del peso vivo fueron 21.46 g y 3.25%, respectivamente; mientras que el consumo de MS como porcentaje del peso vivo y en gramos por kilogramo de peso metabólico fue de 2.89% y 146.11 g, respectivamente. La ingesta promedio diaria de proteína por kilogramo de cuy vivo fue de 2 g. The objective of this study was to evaluate the nutritional quality of maca stubbles (Lepidium peruvianum Chacon) from threshing for the collection of botanical seed, in the province of Junín (4000 mabove the sea level), Peru. The proximal chemical composition and the digestibility coefficients, the total digestible nutrient contents, the voluntary consumption, and the protein intake of the maca stubbles were determined. Four 4month-old male Wanka guinea pigs were placed in metabolic cages to collect urine-free faeces. The contents of moisture (H), dry matter (DM), total protein (TP), ether extract (EE), crude fibre (CF), nitrogen-free extract (NFE) and ash of maca stubbles were 11.30, 88.70, 6.97, 3.58, 36.35, 44.53 and 8.58%, respectively; the digestibility coefficients of the DM, PT, EE, EC, ELN, organic matter (OM) and total digestible nutrients of maca stubbles were 74.79, 68.00, 75.27, 71.78, 77.08, 74.21 and 71.21%, respectively. The average consumptions of fresh maca stubbles per guinea pig/day and as a percentage of live weight were 21.46 g and 3.25%, respectively; while the consumption of DM as a percentage of live weight and in grams per kilogram of metabolic weight was 2.89% and 146.11 g, respectively. The average daily protein intake per kilogram of live guinea pig was 2 g.

Se comparó la calidad del semen refrigerado de carneros Assaf y Blackbelly utilizados en inseminación artificial y criados en la costa central del Perú. El semen fue colectado con vagina artificial y diluido en Tris-fructosa-yema de huevo. Se determinó la motilidad individual progresiva, la integridad de membrana mediante la prueba hipoosmótica (HOST) y la concentración espermática a través de la cámara de Neubauer a las dos horas de la refrigeración. Los valores porcentuales fueron transformados a ArcSeno %. Se realizaron pruebas de «t» Student para determinar diferencias de medias independientes entre las variables determinadas, según la raza. La motilidad individual progresiva fue de 82.36 ± 6.66 y 83.30 ± 4.92% (p>0.05) ylamotilidadmasalfuede4.28±0.45y4.06± 0.33 (p%. The Student «t» test for independent means differences between breeds was performed. Progressive individual motility was 82.36 ± 6.66 and 83.30 ± 4.92% (p>0.05) and the mass motility was 4.28 ± 0.45 and 4.06 ± 0.33 (p

Objective. The aim is to compare the three references used for the classification of the nutritional status of 36 to 60 month-old children in Huancayo province (Peru). For a long time, NCHS-1977 reference has been used for child growth monitoring, recently the new WHO-2006 Child Growth Standards is being used, and CDC-2000 reference usage has been restricted. Methods. Data collected from 2640 children over the period 1992 to 2007 served as basis for determining the nutritional children status using Anthro V.3.0 and EpiInfo 6.04. Internationally cutoff points used in every assessed reference system helped to determine the nutritional status and to calculate the Z-scores of height-for-age, weight-for-age, weight-for-height and body mass index differentiated by sex. Results. The underweight, stunting and wasting percentages (period 992-2007), determined with NCHS-1977 reference were 8.4%, 28.8% and 0.9%; with CDC-2000 reference were 10.2%; 19.1% and 3.3%, and with WHO-2006 standard were 6.6%, 33.9% and 1.4% respectively. The overweight and obesity percentages determined with CDC-2000 standard were 11.4% and 4.20%, and with WHO-2006 standard were 8.0% and 0.9%, respectively. Conclusions. A more realistic and accurate detection of malnutrition prevalence in 36-to-60 month-old children from Huancayo province was carried out using the new WHO Child Growth Standard. Using the CDC-2000 standard is recommended in overweight monitoring cases.

Con el objetivo de evaluar el estado de los principales parámetros reproductivos del ganado vacuno Nellore criado en una zona de la selva central del Perú, se evaluó la información reproductiva de 63 vacas que tuvieron tres partos consecutivos entre 2000 a 2007. Se evaluó la edad a la primera concepción, edad al primer parto, intervalo entre el primer, segundo y tercer parto, días vacíos entre el segundo y tercer parto y el peso al nacimiento de los cuatro primeros partos. La edad a la primera concepción fue de 30.7 ± 6.0 meses (rango: 17.7-42.9 meses), edad al primer parto de 40.2 ± 6.0 meses (rango: 27.2 52.4 meses), intervalo entre partos de 434.1 ± 58.6 días (rango: 317-540 días), días vacíos de 179.8 ± 55.5 días (rango: 90-292 días) y peso de las crías al nacimiento de 27.0 ± 4.9 kg (rango: 20-40 kg). The aim of this study was to assess the status of major reproductive parameters of Nellore cattle reared in the central tropics of Peru. Reproductive data of 63 cows that had three consecutive calvings between 2000 to 2007 was used. The variables were age at first conception, age at first calving, interval between the first, second and third calving, open days between second and third calving, and calf birth weight in the first four parturitions. Age at first conception was 30.7 ± 6.0 months (range: 17.7 to 42.9 months), age at first calving was 40.2 ± 6.0 months (range: 27.2 to 52.4 months), calving interval was 434.1 ± 58.6 days (range: 317 to 540 days), open days was 179.8 ± 55.5 days (range: 90-292 days) and body weight at birth was 27.0 ± 4.9 kg (range: 20-40 kg).

El estudio tuvo como objetivo determinar la edad de alpacas Huacaya en el aprendizaje temprano a la ingesta de concentrado con influencia materna previa, sustentado en la susceptibilidad de las alpacas jóvenes de no ingerir concentrados a causa de la neofobia. El estudio se llevó a cabo en la sierra central del Perú, con 30 crías de alpaca (y sus madres), distribuidas en tres grupos de 10 animales de 2, 3 y 4 meses de edad por cada grupo. Se les ofreció un concentrado por 15 días a base de subproducto de trigo, cebada molida, pasta de algodón, melaza y sales minerales, y se evaluó la aceptación diaria. El 80% de las crías de cuatro meses aceptaron el concentrado a los 8.8 ± 0.5 días (p

El estudio se realizó en la sala de digestibilidad de la granja de cuyes de la Universidad Nacional de Huancavelica, con el objetivo de evaluar el efecto del tratamiento alcalino de la totora (Scirpus californicus), forraje existente en centros experimentales de Lachoc, Tucumachay y Paturpampa, empleando hidróxido de sodio (NaOH) al 2, 3 y 4% en base seca, sobre la digestibilidad de materia seca y proteína en cuyes. Luego del tratamiento alcalino de la totora se realizaron pruebas de digestibilidad en 16 cuyes machos de 4 meses de edad de la Línea Inti, empleándose 4 animales por tratamiento: (T1): Totora sin tratamiento alcalino, (T2) Tratamiento de totora con NaOH al 2%, (T3) Tratamiento de totora con NaOH al 3% y (T4) Tratamiento de totora con NaOH al 4%. Los coeficientes de digestibilidad (%) para la materia seca da la totora sin tratamiento y tratada con 2, 3 y 4% de NaOH, fueron 63,46b, 65,27b, 69,88a y 70,86a (P, The study aimed to evaluate the effect of alkaline treatment of the California bulrush (Scirpus californicus) treated with sodium hydroxide (NaOH) at 2, 3 and 4% on a dry basis, on dry matter and protein digestibility in guinea pigs (Cavia porcellus). The digestibility tests were conducted on 16 adult male guinea pigs of the Inti genetic line. Four animals were used per treatment: (T1): California bulrush without alkaline treatment, (T2) with 2% NaOH, (T3) with 3% NaOH, and (T4) with 4% NaOH. The digestibility coefficients of dry matter in T1 to T4 were 63.46, 65.27, 69.88 and 70.86% respectively, where T1 and T2 were significantly different from T3 and T4 (p