HYSIOLOGICAL CONDITION OF LACTATION HOLSTEIN COWS IN SIBERIA

The authors found out the differentiation of animals according to hematological and biochemical indicators in the herd ofHolsteincows in spring and summer. Variability of characteristics varied from 7.6 to 36.9%; it was the lowest one according to the number of erythrocytes, hemoglobulin and blood serum crude protein. All the indicators varied more in autumn whereas quantitative characteristics of hematological status didn’t vary significantly in autumn except the growing number of erythrocytes. The authors observed the following tendency in respect to biochemical indicators of protein, fat and carbohydrate metabolism. The authors found out that slight reducing of features variability in autumn, the concentration of total protein and glucose in blood serum rose. That was explained by seasonal peculiarities of animal feeding. Population analysis found out the features that mostly have deviations from the norm. About 93% of animals had lower concentration hemoglobin in spring and about 84% of cows had lower number of erythrocytes. The authors observed higher concentration of cholesterol in half herd of cows in spring and autumn. Favourable changes in concentration of total protein occurred in autumn. The most part of animals had less active glutamyl pyruvic transaminase (GPT) in all the seasons of the year. In spring glutamyl pyruvic transaminase, effect and alkaline phosphatase effect was stringer effect was stronger and exceeded the norm in 57 and 20% of animals. The analysis of hematological and biochemical indicators has shown that their level and variation in blood depends on a season at different degrees. This occurs due to feeding factors and overall health. The issue on parameters of physiological status and their confirmation to the standards must be clarified depending upon a breed, productivity and physiological status

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