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Information × Registration Number 0221U102433, 0119U001182 , R & D reports Title Optimize reproduction methods for high-yield dairy cows popup.stage_title Head Registration Date 02-02-2021 Organization Institute of Animal Breeding and Genetics nd. a. M.V.Zubets of NAAS popup.description2  Heifers were inseminated at the age of 12–22 months when they reached a live weight of 350–380 kg. In scientific and practical experiments, cows were under control. According to personal research and zooveterinary accounting of SE "Chaika" (branches Dudarkiv, Chemer, Lisne) physiologically normal calving occurred in 72% of heifers and cows, and in 19% of cases maternity care was provided by 1–2 people. In 9% of animals, births were difficult and required qualified veterinary care. During the normal course of labor and the postpartum period, the recovery period in first-born cows lasted an average of 95.0 days, the service period – 120.3 days, and in sick cows – 120 and 212 days, respectively. 28% of cows were culled for limb, udder and reproductive diseases. Based on the results of scientific and practical experiments and analysis of economic indicators, we can conclude that the optimal age of insemination of heifers should be considered 14–18 months. With normal development and live weight of 360–380 kg at the first fertilization, the duration of the service period is 100-120 days, milk productivity of Holstein cows 8-10 thousand kg of milk, UBaWDB – 8–9 thousand kg, URaWDB – 7.5 – 8 thousand kg. Product Description popup.authors Boiko Olena V Demchuk Stepan Yu Sharapa Hryhorii S Shykova Nataliia V popup.nrat_date 2021-02-02 Close