Abstract
Various factors influence the milk productivity of cows. The article presents the results of studies conducted in the APB “Zaozerie” of JSC “Vitebsk Meat Processing Plant” on 326 cows with completed lactation. In the course of scientific and economic
 experiment, it was found that the highest milk yield of 8417 kg was obtained from the cows of the 3rd lactation, with a significant increase in milk fat to the level of 316.4 kg. Gain in the live weight of cows in the herd to 651-700 kg contributes to a significant increase in their milk productivity to the level of 8430 kg of milk with a milk fat yield of 312.1 kg. The highest milk yield was obtained from cows with a dry period of 51-70 days - 9415 kg of milk (p≤0.001) with a milk fat yield of 358.7 kg and with a service period of 61-90 days - 7675 kg of milk with a milk fat yield of 285.5 kg (p≤0.001).
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