Influence of breed on longevity and lifetime productivity of cows

Abstract

That article presents studies of the influence of breed affiliation (Black-and-White and Brown Swiss) on longevity and lifetime productivity of cows in pedigree farm Radishevo in Smolensk region. In sum general, we can say about the productive advantage of Black-and-White cows over Brown Swiss. But when comparing the productivity of an equal level of milking (6000 kg) between the breed groups, there is an advantage of Brown Swiss cows over Black-and-White cows for life milk yield and duration of use, respectively, at - 1242 kg, 0.62 lactation. The progress of the breed in the conditions of this farm for Black-and-White cows stops at the level of productivity of their mothers - 6000-8000 kg, for Brown Swiss 6000 kg, as a further increase in productivity offspring does not occur. The best economic traits are characterized by animals of the phylon of S. T. Rokit 25280 and Azot-Plovets 196 line. The results obtained, confirmed by the calculation of correlations and one-way ANOVA test, allow conducting targeted breeding work with each of the breeds to increase the important economic trait - productive longevity.