USE OF COMPLEX ADDITIVES ON THE BASIS OF NATURAL SORBENTS IN FEEDING CALVES
We studied parameters of nitrogen metabolism in the blood of young cattle. Studies were conducted on calves from birth to three months old, selected in the group on the principle of analogues. The difference in animal feeding was the fact that the zeolite containing marl Siuch-Ushansky field of Ulyanovsk region was added to the diets of calves of group II, III - marl in the complex with citric acid, and group IV - marl complex with lactic acid. The first control group received no supplements. The results showed that the introduction of complex organic acids and zeolite containing marl in the diets of calves leads to positive changes in indicators of nitrogen metabolism in their blood (within physiological norms): total protein and its fractions, urea, residual nitrogen, creatinine, aminotransferases (AST and ALT). The introduction of natural sorbents in combination with organic acids in the diet of calves enhances nitrogen metabolism in their body. To improve the palatability of feed the animals and improve the quality of mixing of the developed model of the mixer feed.