The effect of the duration of service period on milk productivity of cow’s heifers
The level of reproduction of the herd plays an important role as a factor determining the milk productivity of cows. This article presents the milk productivity of cows heifers depending on the duration of the service period. The study found that, with a service period of more than 180 days, productivity begins to decline, the optimal period from calving to fruitful insemination can be recommended for a period of 90 to 120 days after calving, but no more.