Realization of heredity potential Holstein breed with the intensive technology

Abstract

Evaluation of the effectiveness Holstein cows was performed according to the combined characteristics of productivity method and reproductive ability. It is established that the cows show a clear pattern that the increase in productivity is accompanied by a prolongation decrease in the coefficient of reproductive capacity. It is determined that the higher the level of productivity of cows is, the greater is its impact on the reproductive capacity of animals. In highly productive cows of Holstein breed of Ukrainian selection of the І generation, the lowest value of the coefficient of reproductive capacity (CRC = 079) was established. In the selection work with dairy cattle of Holstein breed, we should take into account the possibility of improving productivity in animals with lower milk yield without deterioration of reproductive capacity, and for breeding high-yielding cows we should use those that show combined traits which belong to group "1-1".