Comparative evaluation of russian black pied and holstein cattle breeds of foreign breeding

A related Holstein breed has recently been used to improve domestic dairy cattle and create highly productive herds by purchasing semen from breeding bulls, as well a large number of heifers calves foreign breeding. The purpose the work is comparative assessment qualities Black Pied cows Purebred differ animals in milk yield per lactation 1064 kg or 15.2% (P≤0.01, favor cows). In terms quality indicators milk, that are content fat protein superiority remained with cows. difference was significant at P≤0.05 for P≤0.001 content. Both groups exceeded standard lactation, mass fraction milk. Russian contains more essential amino acids. both breeds can be considered complete, since amount limited acids purebred over 95% their ideal protein.