TY JOUR TI INFLUENCE OF BIOLOGICALLY ACTIVE SUBSTANCES OF PROPOLIS ON BIOCHEMICAL INDICATORS OF BLOOD AND MORPHOMETRIC INDICATORS OF INTESTINE OF YOUNG PIGS KW biochemical parameters KW propolis KW morphometric parameters KW intestines KW young pigs KW physiology KW diet JO Adaptive Fodder Production AU Gaponov, N.V. PY 2021 IS 2021 PB Federal Williams Research Center of Forage Production and Agroecology