1990•Journal of Dairy ResearchRequires access

Yield and composition of milk from lactating mares: effect of lactation stage and individual differences

Michel M. Doreau, Sylviane Boulot, Jean-Pierre Barlet, Philippe Patureau-Mirand

Abstract

The yields and composition of milk from nursing mares were studied during the first two months of lactation in 11 mares of heavy breeds (784 kg). Daily yield increased from 21.7 to 24.6 kg between weeks 1 and 8 of lactation. Fat, protein, gross energy and Ca concentrations significantly decreased when lactose content increased during this period. Individual variations were higher for yield than for composition. Casein, whey protein and non-protein N (56, 34 and 10% of crude protein, respectively) and amino acid composition did not vary between weeks 1 and 8 of lactation.

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Key concepts: Lactation, Lactose, Composition (language), Casein, Animal science, Milk protein, Chemistry, Biology