Influencia del número ordinal del parto en la composición láctea en cabras criollas de la zona central de Chile
2010; Volume: 8; Issue: 2 Linguagem: Inglês
10.5354/acv.v8i2.6129
ISSN0719-5273
AutoresM Patricio Pérez, R Germán Ferrando, Soledad Alvear, D Pamela Berti,
Tópico(s)Agricultural and Food Production Studies
ResumoLa composicion quimica y las caracteristicas fisicas de la leche determinan en forma importante su valor nutritivo y adaptabilidad a los distintos procesamiento para la obtencion de subproductos. Es por lo tanto fundamental en todo tipo de cabra conocer la composicion lactea a traves de todo el periodo lactaciones y la capacidad de la hembra para mantenerla estable a lo largo de partos sucesivos. Con este proposito un total de 41 hembras, distribuidas en grupos de 12, 19 y 10 de segundo, tercero y cuarto parto, respectivamente, fueron sometidas a muestreo individual lacteo cada tres semanas a partir de la 7a y hasta la 28a semana de lactancia. Los componentes lacteos analizados fueron solidos totales (ST) materia grasa (MG), proteinas totales (PT) y cenizas (CN). Los animales permanecieron en una pradera anual mediterranea. El numero ordinal de parto influyo significativamente sobre el porcentaje de ST y PT (P Palabras claves: cabras, gestacion, composicion de leche. Abstract Chemical composition and physical properties of milk influence its nutritive value and the process to obtain by products, so it is important to know these characteristics through different sucesive lactations. In orden to determine the possible variations in milk composition in relation with the number of parturition a total of 41 creole chilean does divided in 12,19 and 10 animals in their 2 nd , 3 nd and 4 th parturition were sampled each 3 weeks from the 7 th up to the 28 th week of lactation. The milk components analized were: dry matter (DM); fat (F); total proteins (TP) and ashes (A). The animals were kept under field conditions in a natural mediterranean pasture. The number of parturition, influence statistically the percentage of DM y TP (P 0.05). The average milk composition for the herd was: 15,4% (DM); 6.1% (F); 4.4% (TP) and 0.9% (A). Positive and significant correlations were founded between: DM–F, DM–TP; F–TP; TP–A (P 0.05). The variable values of some milk components in relation with the parturition number should indicated a limited biosynthetic capacity, of the mammary gland due to a poor genetical selection. Key Words : Goats, pregnancy, mil composition.
Referência(s)