Всероссийский научно-исследовательский институт физиологии, биохимии и питания животных – филиал Федерального государственного бюджетного научного учреждения «Федеральный научный центр животноводства – ВИЖ имени академика Л.К. Эрнста»
ABSTRACT. The aim was the study of efficiency of lyophilized form of probiotic being developed on the basis of four strains of lactobacilli (TLB). The experiment was carried out from the 1st to 20th day on two groups of calves, 10 bulls and 10 heifers each, the calves of control groups fed the basic diet (BD) and calves of test group fed BD + 1 g of a dry preparation of TLB with titre of viable cells 5×1010 CFU/g during 5 days in a week. Probiotic supplement to the diet influenced the formation of the microbiocenosis in digestive tract, which resulted in a significant increase in the number of lactobacilli (P<0.05) and a decrease in the amount of Escherichia coli. In animals of the test group, the indices of nonspecific resistance (phagocytic and bactericidal activity of the blood serum, lysozyme content) were higher than in the control (P<0.05). In calves that received TLB supplement, the urea content was higher than in control animals (P<0.05), which indicates an increased metabolism of nitrogenous compounds. The higher glucose level in blood serum in these calves (P<0.05), in comparison with control group, was probably due to a more intensive fermentation of carbohydrate feeds due to the colonization of the digestive tract by lactobacilli, which are part of TLB. The revealed physiological effects determined the increase in the mean daily live weight gain of calves in the test group over 50 days of observations by 13%, in comparison with the control group.
REFERENCES