TY JOUR TI JUSTIFICATION FOR THE LEVEL OF PRODUCTIVITY OF LACTATING COWS WHEN APPLYING BIOLOGICALLY ACTIVE SUPPLEMENT ‘FERROURTIKAVIT’ IN THEIR DIET KW biologically active supplements KW ‘Ferrourtikavit’ KW milk productivity KW hematological pa-rameters JO Bulletin of KSAU AU Zaitseva, T.N. AU Dolmatova, I.A. AU Baryshnikova, N.I. PY 2017 IS PB Krasnoyarsk State Agrarian University