Characteristics of biological and economic qualities Holstein cattle

In the presented article, the milk productivity of cows of the Black Pied breed of different genotypes in the 1st lactation is considered. The biological indicators of cows in the base farms and farms of comparison are analyzed. Features of the shape of the udder of cows in the early period of childbirth, the size and functional characteristics of the udder of heifers, as well as quantitative differences in the protein content in the milk of Holsteinized and reference cows.