Breed and seasonal-age features of the semen quality of bull-manufacturers in SUE UR "Mozhgaplem"

Studies were conducted on bulls Holstein, black-and-white and Limousine cattle. Bulls Holstein breed have a higher volume of semen, bulls black-motley breed showed higher rates of survival of spermatozoa within 1 and 5 hours after thawing, the bulls Limousine cattle had higher values of concentration of sperm. Observed statistical regularity of the influence of the age of the bull and the time of year on the quality of Spermproduction.