Dairy productivity of Swiss cows of different origin

The article presents the results of a comparative assessment of the dairy productivity of Swiss cows of different origin. The superiority in milk yield of the first heifers of the brown Swiss breed of Austrian breeding in all months of lactation over the peers of other groups has been established. At the same time, the lactation curves of imported heifers and their hybrids with local Shvits indicate that the maximum levels of productivity were observed in earlier periods – for 2-3 months lactation, whereas in individuals of the local population – for 3-4 months. After the peak of the productivity of the experimental livestock, the Austrian and crossbred Swiss heifers, whose lactation curve was relatively equalized, were the best preserved at the achieved milk yield level, while the local Swiss heifers had a sharp decline. The highest level of milk yield was distinguished by the first heifers of imported breeding, which surpassed both half-blooded peers (by 686 kg, P>0,999) and individuals of the local population (by 1656 kg, P>0,999). Imported animals, as well as crossbreeds, exceeded the yield of milk fat by 37,8-62,7 kg (P>0,999) and milk protein by 31,8–54,1 kg (P>0,999) of the peers of the brown Swiss breed of the local population.