Features of age changes in selenium content in the dietary tract departments

The concentration of selenium and its content in the walls and chyme of the stomach and intestine sections of bulls 6-18 months of age during haylage feeding was studied experimentally. Three groups of bulls of the black-and-white breed, taking into account sex, age and body weight, on the principle of group analogs, were formed. Rations for experimental animals were according to detailed norms of the RAAS, taking into account the chemical composition of local feeds. The feed consisted of: corn, wheat, barley, sunflower meal, salt, chalk. Feeding was carried out twice according to the daily routine adopted by the farm. Daily doses of mineral supplements were mixed with concentrates, which ensured their full palatability. It was found that selenium was found in all parts of the digestive tract and it is unevenly distributed. In the walls of the abomasum, selenium concentration is the highest and more pronounced in bulls at 18 months of age (0.653 mg / kg). The lowest concentration of the element was observed in the walls of the small intestine (0...