EFFICIENCY OF TISSUE BIOSTIMULATOR APPLICATION IN THE GROWING REPLACEMENT HEIFERS’ TECHNOLOGY

The purpose of research is to study the effectiveness of using a tissue biostimulator in the technology of raising replacement heifers for their reproductive qualities. The experiment was carried out in the conditions of the Altai Region on 4 groups of heifers of the Priob type of black-and-white breed, each of them had 10 heads. The duration of the experiment was 18 months. Animals of the control group were injected subcutaneously with physiological saline every month: from the 1st to the 5th month – at a dose of 3.0 ml/head, from the 6th to the 11th month – 6 ml/head, from the 12th on the 15th month – 12.0 ml/head and from the 16th to the 18th month – 15.0 ml/head. The heifers of the experimental groups were injected with a tissue biostimulator according to the following schemes: in group I – from the 1st to the 5th month – at a dose of 2.0 ml/head, from the 6th to the 11th month – 4 ml/head, from the 12th to the 15th month – 8.0 ml/head and from the 16th to the 18th month – 10.0 ml/bird; in II – from the 1st to the 5th month – at a dose of 3.0 ml/head, from the 6th to the 11th month – 6 ml/head, from the 12th to the 15th month – 12.0 ml/ head and from the 16th to the 18th month – 15.0 ml/head; in the III experimental group – from the 1st to the 5th month – at a dose of 4.0 ml/head, from the 6th to the 11th month – 8.0 ml/head, from the 12th to the 15th the month – 16.0 ml/head, and from the 16th to the 18th month – 20.0 ml/head. The biostimulator is made from slaughterhouse waste and by-products of antler deer. The scheme of its use, used in the II experimental group of animals, turned out to be the most effective and contributed to reducing the age of first insemination by 13.9 % (p < 0.001), the age of fertile insemination occurred earlier by 13.4 % (p < 0.01), index insemination decreased by 16.7 % compared to similar indicators in the control.