THE INFLUENCE OF LONG-LIVED COWS ON THE PRODUCTIVE LONGEVITY OF THEIR DAUGHTERS
Journal Title: Науковий вісник Національного університету біоресурсів і природокористування України. Серія : Технологія виробництва і переробки продукції тваринництва - Year 2017, Vol 1, Issue 271
Abstract
The productive longevity of dairy cattle is influenced by many genetic factors, in particular the origin of long-lived mothers. The aim of the research was to study the effect of long-lived cows on the productive longevity of their daughters: longevity, productive use and lactation, lifetime milk yield, lifetime average fat content in milk, lifetime milk fat, lactation per life, milk yield for one day of life, productive use and lactation, economic use coefficient and lactation coefficient. The research was carried out on animals of Holstein, Ukrainian Black and Red-and-White dairy breeds. By most indicators of productive longevity, the descendants of long-lived cows of the Holstein breed were inferior not only to their mothers, but also in average to the whole herd. The daughters of long-lived cows of Ukrainian Black- and Red-and-White dairy breeds were characterized by slightly higher productive longevity than the average in the herd: their lifetime milk yield was higher by 10,4 and 28,9 % respectively, and the number of lactations per lifetime was 6, 4 and 22,7 % respectively. In the control livestock of long-lived cows of Ukrainian Black and Red-and-White dairy breeds from bulls of Ukrainian selection were got respectively 55,8 and 57,9 % animals. Therefore, in the future, in order to increase indices of the productive longevity of dairy breed cows, it is better to use domestic bulls.
Authors and Affiliations
N. P. Babik, Ye. I. Fedorovych
Keywords
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