TECHNOLOGICAL AND ENVIRONMENTAL ASPECTS OF BEEF PRODUCTION
The article presents the results of studies carried out in the conditions of the Republic of Tatarstan, aimed at studying the effectiveness of the use of a mineral additive when feeding bulls of the Hereford breed. Scientific and economic experience was carried out in LLC "Druzhba" of Buinsky district of the Republic of Tatarstan. The object of study was the Hereford bulls. The cultivation of experimental bulls from 8 to 18 months of age in identical conditions was organized in accordance with the requirements of GOST R 56508-2015. The fattening of gobies in the spring and summer period was carried out on pastures. Laboratory studies have shown that the mineral supplement belongs to the fourth class of chemicals and is a low-toxic compound. The assessment of the toxicity of the mineral supplement and its biological testing on rabbits and white mice did not reveal the presence of acute oral toxicity, allergic effects on the skin and conjunctiva in animals. During the scientific and economic experiment, it was found that in the experimental group of bulls, their live weight at the age of 18 months was 547.4 kg, which turned out to be higher than the live weight of bulls in the control group by 9.2% (p<0.01) ... The introduction of a mineral supplement into the diet of bull calves contributed to an increase in the average daily gain by 10.8% and slaughter weight by 11.3% (p <0.05). In the experimental group, the slaughter yield was within 61.4%. In the beef of the control and experimental groups, the content of heavy metals was within the permissible limits. In the beef obtained from the bulls of th