The interrelation of the Russian Black Pied breed productive qualities of the Ural type depending on live weight

Holsteinized Russian Black Pied cattle of the Ural type are bred in Sverdlovsk region, which is represented by large, highly productive animals with a high genetic potential for productivity. The purpose work was to study effect first heifers’ live weight on their productivity and interrelation between milk yield quality indicators. It found that there positive tendency an increase cows’ from less than 550 kg 624 kg. most significant cows range 574 599 difference these groups 692 or 8.1% favor 575-599 An over 625 leads decrease yield, amounted 2.3%. Changes correlation observed negative average value more In heifers 575 kg, very low per lactation recorded (0.04).