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

Published online by Cambridge University Press:  01 June 2009

Michel Doreau
Affiliation:
Laboratoire de la Lactation, Institut National de la Recherche Agronomique, Theix, 63122 – Saint-Genès-Champanelle, France
Sylviane Boulot
Affiliation:
Laboratoire de la Lactation, Institut National de la Recherche Agronomique, Theix, 63122 – Saint-Genès-Champanelle, France
Jean-Pierre Barlet
Affiliation:
Laboratoire des Maladies métaboliques, Institut National de la Recherche Agronomique, Theix, 63122 - Saint-Genès-Champanelle, France
Philippe Patureau-Mirand
Affiliation:
Laboratoire du Métabolisme azoté, Institut National de la Recherche Agronomique, Theix, 63122 - Saint-Genès-Champanelle, France

Summary

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.

Type
Original Articles
Copyright
Copyright © Proprietors of Journal of Dairy Research 1990

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