12 months aged heifers' blood serum protein composition on the background of tissue biostimulator different doses application

The aim of the study is to determine the protein composition of blood serum against the background of the use of different doses of a tissue biostimulator. The experiment was carried out in 2020-2021 in the conditions of the farm of AO Uchkhoz Prigorodnoye (joint-stock company) of the Industrial District of Barnaul, of the Altai Region on replacement young cattle. The tissue biostimulator was administered to the animals of the experimental groups from the 1st to the 12th month of rearing monthly with an interval of 30 days in different doses according to the following schemes: Experimental group I from the 1st to the 5th month - 2.0 ml/head, from 6 th to 11th months - 4.0, at 12 months - 8.0 ml/head; Experimental group II from the 1st to the 5th month - 3.0 ml/head, from the 6th to the 11th month. - 6.0, at 12 months - 15.0 ml/head; III experimental group from 1 to 5 months. - 4.0 ml/head, from 6th to 11th months - 8.0, at 12 months. - 16.0 ml/head. Animals of the control group were injected with physiological saline from the 1st to the 5th month at a dose of 3.0 ml/head, from the 6th to the 11th month. - 6.0, at 12 months - 15.0 ml/head. It was found that the optimal dose and scheme of administration of a tissue biostimulant, contributing to an increase in the concentration of total serum protein by 4.3-7.5 % (p ≤ 0.001) and albumin by 17.6-15.5 % (p ≤ 0.01) accordingly is 3.0 ml/head from the 1st to the 5th month, 6.0 ml/head from the 6th to the 11th month and 15.0 ml/head at 12 months of age.