The article contains information on the state of the processes of lipid peroxidation (LPO) in fresh cows under the influence of stress reaction caused by labor and the beginning of the lactation period. To reduce oxidative stress in the body of fresh cows, antioxidants were used in the form of preparations “E-selenium” and “Butofan”. The aim of the research was to determine the effect of vitamin-containing preparations “E-selenium” and “Butofan” on the productivity of fresh cows, the quality of milk and butter, made from it. The studies were carried out during the winter-stall period on one of the farms of Ryazan district of Ryazan region and involved 12 fresh black-and-white cows aged 4 years. The control group of animals was intact. As a result of the investigations, it was found that due to the action of the above preparations, which have antioxidant properties, the productivity parameters in the experimental groups of animals were higher compared to the control group, because they had an inhibiting effect on lipid peroxidation processes in the organism and activated the work of its own antioxidant system.

The article discusses the method of heart rate variability as a test for early forecast of the potential of animal milk productivity. The correlation dependence of the milk productivity of cows of the Jersey breed with a stress index is provided. The article discusses the reduction of milk productivity of cows with the autonomic regulation of sympathicotonia in the process of economic use. The paper analyzes parameters of milk productivity of the experimental group of animals for different periods of time and the significant difference in milk productivity for different years is indicated.

For several years, strengthened state support caused a situation, when domestic livestock has reached the European level on many qualitative and quantitative parameters. At the same time, dairy cattle breeding remains one of the most problematic branches. Intense loads during economic use lead to a decrease in vital energy and functional and physiological reserves of the body. The problem of reducing the economic characteristics of cows with age is relevant. In this regard, many questions related to the need to preserve these functional reserves arise and the latter can be studied using non-invasive methods. One of such methods is cardiointervalometry of heart rate variability. The method allows evaluating the physiological state of the animal, which can be influenced by both exogenous and endogenous factors.

The article presents the results of experimental studies on the use of nanosized iron powder in the third trimester of gestation on the reproduction processes of sows. The studies were carried out in the conditions of the farm. The physiological state of pregnant sows was determined by hematological parameters. It was found that iron NRP contributed to an increase in the number of red blood cells and hemoglobin in the blood of sows, compared with the control 20 days before farrowing, the content of red blood cells in the blood of experimental sows was 6.3% significantly higher compared to the control, and hemoglobin by 3.8 %. For 10 days, before farrowing, respectively, by 6.9 % and 5.2% higher. The indicators that characterize the reproductive ability of sows are: multiplicity, large fertility, the number of piglets in the nest and their average live weight. The use of ultrafine iron powder in the diets of pregnant sows in the third trimester of gestation contributed to the improvement of the overall physiological state, confirmed by the improvement of hematological parameters and had a positive effect on reproductive ability. The weight of the nest in the experimental group of sows on the day of farrowing was 4.1 % higher, the large-fruiting rate was 3.1 %, compared to the control animals.

The article presents the results of experimental studies to establish the effect of the preparation prepared from the infusion of berries on the hematological parameters of rabbits. The influence of different volumes of the preparation on some hematological parameters and nonspecific immunity of rabbits was determined. The experiment was carried out in the vivarium of the Faculty of Veterinary Medicine and Biotechnology of the Ryazan State Agrotechnological University named after P.A. Kostychev. The experiment involved male rabbits of the Californian breed in the amount of 50 heads, divided into 5 groups: control and 4 experimental. The animals of the control group were intact, the experimental ones received an orally infusion of raspberries of the same concentration, but as a result of the research it was found that the volume of the infusion of berries of berries is of decisive importance for the processes of hematopoiesis in the body of rabbits. Application of dosages of 15 and 20 ml per head per day. It has been proven that this is the best drug that promotes the activation of erythropoiesis and an increase in the formation of hemoglobin in the body of rabbits in a shorter time compared with the use of infusion of smaller volumes. The same volumes are administered to rabbits for 30 years. Days had a positive effect on the increase in leukocytes in the blood, which indicated an increase in the immune status of rabbits, since these cells performed a protective function.