Impact of the microelement complex "Helavit A" on the physiological and biochemical parameters of the Holstein-Frissian breed of cows in the Lower Volga territory

The state of the thyroid gland in young cattle under conditions of iodine, selenium, cobalt, zinc deficiency in the Astrakhan region was studied. A histological analysis was carried out and a description of the state of gland hypofunction was given. We present the results of biochemical studies of blood serum of Holstein-Friesian cows of different age groups, in particular, thyroid hormones. A method for correcting hypothyroidism and hypomicroelementosis of the above elements has been developed and proposed. Our research suggests that in the feed and water of the Astrakhan region there is a low content of iodine, selenium, cobalt, zinc. The obtained data are necessary to create a biogeochemical paradigm of iodine-seleno-zinc-cobalt deficiency in the territory of the Lower Volga, to develop methods and methods for the prevention and treatment of goiter and hypomicroelementosis in Holstein-Friesian breed of cows.