Reproductive capacity of Swiss cows depending on paratypic factors

The Swiss cattle breed is being improved by the method of intra-breed selection using the gene pool of the best representatives of domestic and foreign selection with simultaneous improvement of feeding and housing conditions. Breeding herds of Swiss cattle are distinguished by a high genetic productivity potential, which indicates the competitiveness of the breed. Research on the age-related variability of the reproductive qualities of the Swiss breed, conducted in three breeding farms of the KBR, showed that all zooveterinary measures should be aimed at realizing the biological potential of the productive longevity of Swiss cattle, paying attention to the need for targeted cultivation of replacement young animals and the annual introduction of 25-35% or more of proven first-calf heifers into the herds. The feeding and housing conditions created at all stages of rearing and lactation contribute to the implementation of the reproductive capacity potential of Swiss cattle, as evidenced by the close to optimal values of the reproductive capacity coefficient, which varied within the range of 0.96-0.97. The main reasons for the withdrawal of animals from farms are disorders of the reproductive organs (gynecological diseases, infertility), diseases of the limbs and injuries associated with the technology of keeping, diseases of the udder and low productivity. The average age of cows leaving the herds of Swiss cattle varies within 3.6-5.5 calvings.