MILK PRODUCTIVITY AND HEMATOLOGICAL INDICATORS OF IMPORTED HOLSTEIN COWS
DOI:
https://doi.org/10.51452/kazatu.2022.1(112).923Keywords:
milk productivity; milk fat content; milk protein; milk coefficient; hematological indicators; hemoglobin, red blood cells.Abstract
This article presents the results of studies of milk productivity and hematological indicators of imported and local Holstein cows at the dairy farm of «Kamyshenka» LLP. The data obtained showed that the productivity of imported cows is higher compared to local cows. In addition, studies of the chemical composition of milk of dairy cows by fat content and protein were carried out. The data obtained indicate that the adaptation of imported cows is successful. At the same time, the results of the study of the hematological composition of the blood of imported and local cows are presented. The amount of formal elements in the blood was within the threshold of physiological norms. Thus, the volume of erythrocytes in the blood of imported Holstein cows is 12.6% higher than that of local Holstein cows. The number of leukocytes and lymphocytes in imported cows was at the upper limit of the norm and exceeded the number of leukocytes and lymphocytes of local cows by 24.4% and 10%, respectively, which most likely indicates the activation of immune protection in the body of animals.
