Enzyme additives are widely used in animal husbandry. They can improve the microbiome of the rumen of animals, increase the assimilation of feed, neutralize toxins, eliminate pathogenic and conditionally pathogenic microflora, positively affect the immune system, and as a result, increase the dairy productivity of cows. The aim of the study was to investigate the effect of the inclusion of an enzyme feed additive during the period of increasing the milk yield (120 days) on the milk productivity and physical and chemical parameters of the ruminal fluid of Holstein cows in tethered housing conditions. The study was conducted at Naro-Osanovsky breeding farm of Odintsovsky District of the Moscow Oblast. Four groups of cows consisting of 10 animals each were formed. The control group did not receive the additive. Kormomiks ENZIM feed additive was introduced into the diet of cows of the experimental groups at 25, 50 and 75 g per head per day, respectively. The gross yield of milk, protein and fat in experimental cereals exceeds similar indicators in the control group. The gross yield of milk of 4% fat content in the experimental groups is higher. The total amount of VFA and the concentration of ammonia in all groups are within the normal range. However, in the second experimental group, the indicators were better in relation to the control group. The question of replacing imported raw materials with domestic ones still remains open. Scientists note the effectiveness of the use of imported enzyme additives, but we have proved that the domestic enzyme preparation shows similar results. We plan to continue research and evaluate the effectiveness of the use of Kormomiks ENZIM feed additive for the entire lactation; we also plan to conduct similar studies on cows of meat and meat-and-dairy breeds and on other ruminants
Keywords
microorganisms, Enzyme activity, gross milk yield, gross protein yield, gross fat yield, digestion, rumen, ammonia