Use of domestic enzyme feed additive during the milking period of cows

The paper considers the need for a scientific approach to the organization of feeding of high-yielding cows. The aim of the research is to investigate the effect of inclusion of enzymatic feed additive during the milking period (120 days) on milk productivity, biochemical and hematological parameters under conditions of tethered housing of cows. The study was conducted in the breeding farm “Naro-Osanovsky”, Odintsovsky district of the Moscow Oblast. We formed 4 groups of cows with 10 animals in each group. The control group did not receive the supplement. In the diet of cows of the experimental groups the feed additive “Kormomix® ENZIM” was introduced at 25, 50 and 75 g per 1 head per day, respectively. The average daily milk yield of natural fat milk increased by 1.87 kg in relation to the control, the result was achieved by the introduction of 75 g of enzyme supplement. When 50 g of enzyme supplement was fed, the average daily milk yield increased by 1.33 kg, when 25 g was fed - by 0.95 kg. Gross yield of milk of natural fat content in relation to the control group increased. A similar trend was recorded in terms of average daily milk yield. Gross yield of milk of 4% fat content increases with the use of enzyme feed additive “Kormomix® ENZIM”: in the third group - by 214.37 kg, in the second group - by 200.97 kg, in the first group - by 120.90 kg. The enzyme supplement does not have a negative effect on hematological parameters. In turn, the biochemical analysis of blood confirms that metabolism in the body of experimental animals proceeds more intensively.