Abstract:The article presents a comparative assessment of the milk productivity, reproductive qualities and productive longevity of Holstein cows of the black-and-white breed, depending on the first insemination of heifers and their linear affiliation. The optimal age of fertilization was established, taking into account the live weight and the duration of economic use of Holstinized black-and-white cows in the conditions of a peasant farm. A comparative analysis of the exterior of cows found that the optimal age for t… Show more
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