Implementation of the productive traits of dairy cattle in farms of the Orel region

The research was carried out in Streletskaya OS, Agrofirma Mtsenskaya JSC and Yupiter LLC, all the three farms being located in the Oryol Region. 2,130 dairy cows were covered by the analysis. Animals of the W.B. Ideal, M. Chieftain and R. Sovereign lines were studied. In Streletskaya OS, 717 Black-and-White Holsteinized cows (HF=76.8±0.7%) surpassed their mothers in terms of milk, fat, milk fat and fat protein by 1,031 kg, 0.08%, 45.1 kg and 31.2 kg, respectively. In terms of milk yield for 305 days of first lactation, the superiority over mothers was 942 to 1,200 kg of milk and 0.01 to 0.19 percent of fat in milk (all lines). In Agrofirma Mtsenskaya JSC, 522 cows (HF = 85.1 ± 0.4%) surpassed their mothers in terms of milk, fat, milk fat and milk protein by 455 kg, 0.05%, 20.9 kg and 12.4 kg, respectively. In terms of milk yield for 305 days of first lactation, the superiority over mother was 940 kg of milk (M. Chieftain line) and 497 kg of milk (R. Sovereign line). In Yupiter LLC, the overall superiority of Holstein daughters over their mothers was 1,209 kg of milk for 305 days of first lactation (p