DMITRY BORISOVICH MANDZHIEV*, DJUNAIDI SHARAMAZANOVICH GAYIRBEGOV AND GENNADY ALEXANDROVICH SIMONOV
National Research Ogarev Mordovia State University, Bolshevistskaya Street 68, Saransk, 43005, Republic of Mordovia, Russia
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(Received : March 20, 2019; Accepted : May 22, 2019)
Based on a detailed study of cobalt contents in the organs and tissues of pregnant ewes and their fetuses, the degree of utilization of this element from rations and accounting for endogenous losses, the standard need of the Kalmyk pregnant ewes in cobalt has been determined, which during early pregnancy amounts to 0.90 mg per head a day, in the middle of pregnancy to 1.05 mg, and during late pregnancy to 1.20 mg per head a day.
Key words :Cobalt, ewes, norm, organs and tissues, concentration, element