Influence of parturition number on milk composition in Chilean creole goats
1993
Perez M, Patricio | Ferrando R, German | Alvear S, Carlos | Berti D, Pamela (Universidad de Chile, Santiago (Chile). Fac. de Ciencias Veterinarias y Pecuarias)
Chemical composition and physical properties of milk influence its nutritive value and the process to obtain byproducts, so, it is important to know these characteristics through different successive lactation. In order 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 2nd, 3rd and 4th parturition were sampled each 3 weeks from the 7th up to the 28th week of lactation. The milk components analyzed 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 indicated a limited biosynthetic capacity of the mammary gland due to a poor genetical selection
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