NITROGEN PRODUCTION ACTIVITY OF THE RUMEN MICROBIOTA IN LACTATING EWES AFTER USE OF ADDITIVE PROBIOTIC ENZYMACTYV IN FEEDING DIET

Abstract

The article presents the results of experimental studies on the dose-dependent effect of the use of domestically produced probiotic Enzymactiv (EA), made on the basis of bread baker yeasts Saccharomyces cerevisiae in the diet of lactating ewes on the production of nitrogenous compounds by the symbiotic microflora of the rumen and the productive qualities of animals. It was established that the introduction of EA probiotic supplements to the combined feed of ewes in doses of 0.4; 0.8 and 1.2% of its mass increases the level of total, residual and protein nitrogen in the ruminal fluid by 0.8-11.1%; 0.1-10.2% and 0.1-16.9% respectively, compared to animals that did not receive bio-additives in the diet. The use of prebiotic EA in the such amounts in the diet of ewes increases the average daily weight gain of lambs by 1.0-9.4% during the period from birth to weaning, and increases wool shearing in ewes by 0.5-2.0% compared to animals of control group. Based on the stimulating effect on the nitrogen-producing activity of the rumen microbiota and the productive qualities of the animals, the most optimal dose of the Enzymactive probiotic for compound feed of lactating ewes is 0.8% of its weight