Impact of probiotics “Rumit” and “Rumit-V” on rumen activity and productivity of dairy cows

In case of violation of technology of feeding and keeping of animals, unbalanced and deficient diets, working stresses, livestock crowding, all metabolic processes in the organism are disturbed, in connection with which there is a violation of intestinal microflora and reduction of milk productivity, which provokes susceptibility to infectious agents and disorders of digestive functions. Therefore, probiotic preparations have recently become widespread to normalize the digestive system and metabolic processes. The scientific and economic experience was conducted in Zazerkalye LLC, Gryazovetsky District, Vologda Region. Two groups of 30 cows each, selected by the miniature herd method, were involved in the industrial trials. Animals of the control group received the basic diet, cows of the 1st experimental group were additionally fed 50 g per 1 head per day of feed additive “Rumit” based on cellulosolytic bacteria of reindeer rumen, and the 2nd experimental group - the same amount of additive “Rumit-V” based on cellulosolytic bacteria of reindeer rumen of a new strain of Bacillus velezensis. Duration of feed additives feeding was 90 days. Inclusion of feed additives in the diets of animals of experimental groups contributed to the increase in the density of their infusor fauna, compared with the control group, in the first experimental group by 67.7% (by 43.3 thousand ops/ml), and in the second experimental group by 3 times (by 126.8 thousand ops/ml) (P ≥ 0.95). When studying the activity of rumen microflora in the experimental groups, we observed a decrease in the time of discoloration of rumen contents by 83 and 59 seconds, which may indirectly indicate a positive effect of probiotic on the digestive processes in the rumen. According to the research results in the experimental groups, additionally received probiotic additives average daily milk yield in cows of the experimental groups that received in addition to the basic diet feed supplements “Rumit” and “Rumit-V” compared to the control, was higher by 7.3 and 8.6%.