EXTERIOR FEATURES OF HOLSTEIN HEIFERS OF VARIOUS GENOTYPES IN THE CONDITIONS OF LLP «BEK+»

Abstract

The article presents the results of a study of the exterior features of the physique of Holstein heifers of various genotypes aged from 6 to 14 months in the conditions of "Bek+" LLP in the Fedorovsky district of Kostanay region. The purpose of the presented work was to evaluate Holstein heifers of different genotypes by exterior characteristics. The objective of the study is to evaluate Holstein heifers of different genotypes by measurements and body indices from 6 months to 14 months. It was found that the heifers of the experimental groups grew intensively and evenly, but the animals of the II group of the Reflection Sovering line slightly surpassed their peers from the I group of the Vis Beck Ideal line in such indices as elongation – 93.7 cm, pelvic-thoracic – 85.3 cm, overgrowth – 98.6 cm, bony – 13.3 cm at the age of 6 months and similarly at the age of 12 months. According to the research results, it was found that both lines correspond to the type of dairy cattle, which is confirmed by their proportional body shape, the development of the middle part of the trunk and strong bone structure. The evaluation of body measurements allowed us to establish the uniformity of the development of animals, this indicates that the animals of the two lines are well developed.