Comparative assessment of growth and development of the heifers of different genotypes to fruitful insemination in LLC “EPF Sayanskoe”

Successful development of dairy cattle breeding largely depends on the organization of repairing young growth. The main task of repairing young growth is to create optimal conditions for the maximum manifestation of breed, productive and individual characteristics of animals. Proper care, feeding, keeping and purposeful breeding of young animals are separate links of a single process of reproduction of the herd and preservation of animals. The main purpose of all mentioned above is to obtain well-prepared heifers, which will reach the age of 23-24 months by calving and will be able to compensate the costs of their breeding and keeping thanks to the milk production. The results of studying the growth and development of heifers of different genotypes from birth to fruitful insemination were given in the study. As a result of the research it was established that compared heifers from birth to 12 months of age grew and developed almost at the same rate. However, in the period of fruitful insemination as at the age of 16-17 and 18-19 months the highest live weight was recorded in the heifers of the Yenisei type, which weight was 389...