Effect of probiotic supplement on biochemical status and calves’ body weight

To increase the production efficiency and competitiveness of livestock products, the rearing of young calves is important, one of the main conditions of which is a full-fledged feeding.An indispensable task is to create conditions in the rumen of ruminants in which feed mixtures are maximally digested and assimilated, and also serve as preventive measures against diseases.For these purposes, on the basis of two farms of the Vologda Oblast (Ltd "Zazerkal'e" and SPK "Kolkhoz Andoga") we conducted a scientific-economic experience of using the probiotic preparation "Rumit" in feeding the Russian Black Pied calves during dairy rearing period.For this purpose, we formed two groups of animals at the age of 2 months in experimental farms by paired-analogy method; each group contained 10 animals.The experimental group was fed Rumit supplement in addition to the basic diet at the rate of 15 g per day per head.The duration of feeding the probiotic was 90 days.We found that the calves of Ltd "Zazerkal'e", which received the biological preparation in addition to the basic ration, in comparison with the control group showed the increase in the total blood protein content by 5.3% (p>0.95) and decrease in the urea and creatinine concentration by 8.2 and 8.1% respectively.In SPK "Kolkhoz Andoga", we noted an increase of total protein content in blood by 7.8% (p>0.95), glucose by 21.5% (p>0.95).We established that blood urea decreased by 12.5% (p>0.95), bilirubin and cholesterol by 5.5 and 11.8% (p>0.95) respectively.When analyzing the calf growth dynamics during the dairy rearing period, the calves of the experimental groups were characterized the higher absolute and average daily growth.Calves in SPK "Kolkhoz Andoga" had a difference of 3.8 and 4.6% compared to the control group, in Ltd "Zazerkal'e" -4.8 and 4.5% respectively.Consequently, the use of the probiotic based on cellulolytic bacteria in calf feeding had a positive effect on the level of metabolic processes and growth rate of young animals.