Assessment of using tissue preparations efficiency in dairy cattle breeding

The aim of the study is to compare the effectiveness of the use of tissue preparations on milk productivity and biochemical blood parameters of cows. The experiment was conducted in 2023 on Simmental cows during the milking period in the conditions of the branch of the Federal State Budgetary Scientific Institution of the Federal Research Center of Cattle Breeding Experimental Station Novotalitskoye of the Charyshsky District of the Altai Region. The experimental cows were administered tissue biostimulants: Experimental Group 1 - biostimulgin at a dose of 30 ml/head, Group 2 - ASD-2 fraction at a dose of 2 ml/head in combination with Eleovit at a dose of 10 ml/head, Group 3 - a tissue preparation at a dosage of 22.5 ml per head per day. The tissue preparations under study were administered subcutaneously in the lower third of the neck 4 times with an interval of 14 days. The experiment showed that the tissue biostimulant had the greatest impact on the milk productivity of the experimental cows. During the first 60 days of lactation, milk yield in animals of experimental group III increased by 4.2 % compared to the control. Milk fat from animals of experimental group III was 4.9 % (p ˂ 0.05) higher than from cows of the control group. According to blood parameters, it was revealed that the amount of total protein increased by 7.4 % (p ˂ 0.05), albumins by 2.0 % (p ˂ 0.01) and AST by 21.5 % (p ˂ 0.01) compared to the control values. The use of tissue preparations in experimental groups I and II was less effective and contributed to an increase in the total protein by 1.6 and 7.8 % (p ˂ 0.05), AST by 2.0 (p ˂ 0.05) and 9.5 % compared to the parameters of the control animals. Animals of the third experimental group generated additional profit of 2,787 rubles.