No abstract

The calves breeding during the first weeks of life is one of the most important factors affecting to their productivity at further growth, which can be affected by diseases, especially gastro-intestinal infections. The use of probiotic drugs is an instrument that can maintain the balance of intestinal microorganisms, prevent diarrhea and improve the further development of calves. The aim of this study was probiotic preparation BК-T influence to the calves growth and health estimation. The functional additive BК-T based on lactobacter bifidobacteria. BК-T-is a polycomponent composition contains four highly active strains of Bifidobacterium infantis, Vifidobacterium animalis, Lactobacillus acidophilus, Lactobacillus paracasei ssp. paracasei, isolated from clinically healthy calves 1-2 months old. The amount of lactic acid bacteria is 1x10 9 CFU/cm 3 , bifidobacterium-3x10 9 CFU/cm 3. Such strainsnatural microorganisms without any genetic modification, actively synthesize various enzymes that contribute to digestion improving. This helped to combine different probiotic properties in one preparation: a wide range of antagonistic activity relative to conditionally pathogenic and pathogenic microorganisms, adhesive properties, vitamin synthesis ability, etc. Enrichment of the main ration of calves with the new functional additive BК-T makes it possible to achieve maximum preservation of calves. In addition, the use of the additive BК-T significantly increased an average daily increments of calves live weight. The calves live weight increasing up to 19 % was established at the BК-T addition to the main diet.