%0 Journal Article %T PROTEIN-NITROGEN METABOLISM PARAMETERS IN HIGH-PRODUCING COWS OF DIFFERENT PHYSIOLOGICAL STATES WHEN FEEDING A TANIN-CONTAINING ADDITIVE %A Omelchuk, A.I. %A Semenyutin, V.V. %A Lavrinova, E.V. %A Kramareva, I.A. %K cows, blood proteins, urea, creatinine, AST, ALT %J SCIENTIFIC NOTES KAZAN BAUMAN ACADEMY OF VETERINARY MEDICINE %D 2026 %N 262 %P 5 %I Kazan state agrarian University