Features of the pro-and antioxidant system of cattle in postnatal ontogenesis in the biogeochemical conditions of the astrakhan region

The article presents the results of research on the peculiarities of the functioning of the pro-and antioxidant system of cattle in postnatal ontogenesis in the biogeochemical conditions of the Astrakhan region. The territory of the Astrakhan region is considered to be deficient in the content of selenium in the soil, water and feed, which is confirmed by our research. This is displayed on the body of animals. It was found that the content of selenium in the blood serum is 0.58 mcg/k, which is lower than the physiological value, which leads to the inhibition of the processes of lipid peroxidation in the body of cattle. In the age aspect, the level of diene conjugates and malondialdehyde increases by 7.4-11.4 % and 11.3-16.1 %, respectively. A correlation was established between catalase activity and age (by 19.6% by the 5th year of life). The correlation coefficient is 0.95.