Сельскохозяйственная биология, 2011, № 6, с. 103-109

УДК 636.2:636.018:591.05

METABOLIC STATE AT THE END OF EARLY LACTATION IN HIGH- PRODUCING DAIRY COWS WITH DIFFERENT REPRODUCTIVE ABILITIES

V.B. Leybova¹, I.Sh. Shapiev¹, I.Yu. Lebedeva²

Biochemical blood indexes and metabolic relationships in high-producing dairy Black-and-White cows with different reproductive potential were investigated at the end of early lactation. A rise in the alanine aminotransferase activity in the blood of animals with the increased reproductive ability was found. This index was also negatively related to the length of the calving to conception interval and magnitude of the protein/glucose ratio in the cow blood. The role of integration of protein and carbohydrate metabolism during early lactation as one of the factors determining the reproductive potential of high-producing dairy cows is discussed.

Keywords: cows, metabolism, reproductive ability, glucose, aminotransferases.

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