TY - JOUR AU - I. Tytarenko AU - M. Bushutruk AU - I. Starostenko PY - 1970/01/01 Y2 - 2024/03/29 TI - THE INFLUENCE OF GROWING SYSTEM OF YOUNG ANIMALS IN THE FORMATION OF HIGH PRODUCTIVITY HERD JF - Theoretical and Applied Veterinary Medicine JA - TAVM VL - 4 IS - 1 SE - Animal Science DO - UR - https://bulletin-biosafety.com/index.php/journal/article/view/137 AB - The aim of research was study the system of growing replacement heifers and the impact of growing heifers repair of Ukrainian black–and-white dairy breed for further milk yield and reproductive ability. In the thesis were search the methods of growing of young animal system improving. It was proved, that system of growing of young animals in the analysed herds had direct relations with  feeding level. Intensive growth of heifers and the possibility of early using  for breeding purposes allows  significantly reduce non-productive period and reduce their age of productive insemination. The results proved that for determine the best moment of first insemination is not age, which is more important, but weight and overall development of the animals, because insemination of heifers with low live weight both in the early and in the older leads to a deterioration their economic value. Intensive and purposeful replacement heifers growing provides their development and modeling of high reproductive performance and milk production. It gives possibility for significantly reducing non-productive period and for  reaching of high  results of milk productivity of cows. In the odder to  achieve of optimal reproductive performance of cows, it is necessary to organize purposeful growing of heifers and provide good feeding. ER -