Relationship between cow milk yield and milk quality indicators

Abstract In the Sverdlovsk region, purebred bull producers of Holstein breed German, Danish and Canadian selection breeding stock domestic black-and-white Ural offspring were used for improvement. The was distinguished by high milk yield fat mass fraction protein in milk. 2002, type cattle officially registered region. This has significant differences from original rocks. purpose article is to study relationship between quality indicators cows-daughters different bulls. It established that depends on belonging a particular producer. However, it can be noted there positive with an average level correlation first lactation milk, groups daughters Emen Reverse. For group Jesmen, negative found per low Correlation coefficients change age. second lactation, differed those lactation. So, they went all evaluated bulls, remained same, but decreased. coefficient bull’s changed negative. Selection cows will allow you get increase full-age