TY JOUR TI DEVELOPMENT AND RESEARCH OF PROBIOTIC PREPARATION FOR FARM ANIMALS KW probiotic preparation KW farm animals KW lactobacilli KW propionic acid bacteria KW vitamin b12 KW physicochemical parameters KW microbiological parameters KW microflora JO Vestnik of Omsk SAU AU AFANASEVA, Y.G. AU KOLODINA, E.V. PY 2024 IS PB FSBEI HE Omsk SAU