MARINA G. KOKAEVA, OLEG K. GOGAEV, BORIS G. CUGKIEV, FATIMA F. KOKAEVA AND MARIYA S. GALICHEVA
Abstract
The research is aimed at the development of the method of enhancement of the metabolism in the lactating cows, and the improvement of the consumer properties of milk through elimination of nitrates and nitrites in the organisms of the animals via supplementation with Toxy-Nil adsorbent and vitamin C. This is one of the approaches to decrease the risks of nitrate-nitrite poisoning in cows and transfer of these toxic agents to milk. Thirty cows were clustered in groups of 3 matching animals, according to their biological characteristics, and cows from each cluster were assigned to three groups, each including 10 animals. The content of nitrates and nitrites was measured according to the conventional protocols. The numerical data were used for the statistical analysis by Studentâs test. Our experiments have shown that the improvement of the economical and biological characteristics of cows requires supplementation of the forage, containing subtoxic doses of nitrates, with vitamin C (0.04% of the dry weight of the ration) and Toxy-Nil (2 g per kg of the concentrates). The cows of the 2nd experimental group had higher numbers of erythrocytes and hemoglobin levels in blood, whereas the content of methemoglobin was decreased. The levels of ammonia in blood were 29.3% higher with a simultaneous decrease in the content of nitrates by a factor of 2.47 and nitrites by a factor of 3.15, as compared to the control values. The supplementation with the mixture of the examined substances for denitrification promoted the improvement of the physical and chemical properties of milk and the decrease in the concentrations of nitrates in milk by 52.4%, nitrites - by 52.6%, and ammonia -by 29.2%.