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The article examining the implication for the microelements’ salts – cobalt and copper – to milk production, vitamin A and trivitamin (vitamin A, D3, E) to the cows’ reproductive function in mountainous areas. The study is relevant due to the fact that when organizing cattle feeding, first of all, we care about the balance of rations for the main nutrients and only then for vitamins, minerals and micro minerals. That is why it becomes more important to provide the breeding stock with vitamins and increase the metabolism of the main substrate of life - protein, change its biological function. It is noteworthy that it is necessary to clarify the way that fat-soluble vitamins on cells act, so that their biological spectrum of action is wider than we realize. The purpose of this research is the further study of the biological role of trace elements and vitamins used in cattle breeding, considering the soil and climatic zones of mountainous areas. In our research, the mountainous farms cows’ feeding with microelements favorably affected their milk pr76nv hghhjhhnhghjuo9huyoduction. So, in animals from the second group, milk yield was higher compared to the control by 0.95 kg of milk, the third – by 1.28 kg and the fourth – by 1.45 kg. Calves from cows that received vitamin A and trivitamin developed better during the embryonic period and their birth weight was 2.8–3.0 kg more compared to the control group. Within 90 days after calving, 87.5–92 % of cows from the experimental groups became enceinte, while in the control group it was only 75 %.

Ecological Aspects of microelements’ and Vitamins’ Salts Impact on Dairy Cows’ Productivity and Reproductive Function in Mountain Territories of KBR