Yenisei type red-mottled breed cows' reproductive qualities

Research studies the reproductive qualities of cows of the Yenisei intrabreed type of red-and-white breed in some farms of the Krasnoyarsk Region. Highest milk yield in 305 days. amounted to 7007 kg, the best mass fraction of fat in milk is 4.27 %, mass fraction of protein is 3.11 %. The age of first calving varied from 26.1 to 26.4 months. First lactation cows had a long service period of 120–205 days. The output of calves to this lactation was from 79.3 to 93.3 %. During the second lactation, the service period was reduced to 108–172 days, the intercalving period was 405–469 days. The highest coefficient of reproductive capacity of cows in the second lactation is 0.93 with an optimal value of 1.5. The fertility index (Doha) ranged from 44.2 to 56.8. This indicates a high fertility of cows. The output of calves was 83.9–95.6 %. The service period in the third lactation lasted 120–147 days, which is less than in the first and second lactations. The intercalving period decreased slightly – to 401–445 days. The reproductive capacity coefficient was 0.86–0.94, the fertility index was 45.4–57.0. The output of calves to the third lactation was 87.9–93 %. The dry-stable period for all lactations was approximately the same – 53–55.9 days. Farm specialists need to take measures to reduce the duration of the service period, which will lead to a decrease in the intercalving period, as well as an increase in the reproductive capacity and fertility index.