The use of biologically active substances of natural origin to increase the productivity of animals

The article presents the results of scientific research on the effect of biologically active substances of natural origin on milk productivity and milk quality, determined from 2018 to 2021 on the basis of livestock complexes of the Orell region: Limited Liability Company (LLC) Maslovo (v. Maslovo, Orel district) and Joint-Stock Company (JSC) Potato Field of the Orell region (v. Saburovo, Orel district) during the winter stall period. The object of the research was high-yielding cows of Holstein and Holstein black-and-white breeds to identify violations in physiological and biochemical homeostasis when keeping animals in stressful conditions of industrial complexes. Milk productivity and milk quality can be considered an objective indicator of the quality of feeding lactating cows and the course of physiological and biochemical processes in them. In the experimental groups of cows of the LLC Maslovo farm, which received additional plant compositions on the 30th day of the experiment, an increase in the average daily milk yield by 0.9 kg (4 %) was established in groups № 2 and № 3 - 1.2 kg. (5.5%); protein - by 0.15% and 0.23%; fat - by 0.15% and 0.26%, respectively. In the experimental groups of cows of the farm of JSC Potato Field of the Orel region, which received additional plant compositions on the 30th day of the experiment, an increase in the average daily milk yield by 2 kg (8%) was established in groups № 2 and № 3 - 2.6 kg. (11%); protein - by 0.15% and 0.24%; fat - by 0.22% and 0.32%, respectively. The experimentally obtained results on the study of the effect of the plant compositions "buckthorn buckthorn + blood-red hawthorn + lecithin" and "purple basil + garden spinach + lecithin" on the oxidant-antioxidant status of cows, milk productivity and milk quality allow us to recommend them for the normalization of adaptive processes in cows in the industrial technology.