FERTILITY CHARACTERISTICS OF GOLSHTIN BREED COWS OF DIFFERENT BREEDINGS.

the study of the age of the animals in the experimental groups at first insemination showed that the age of the animals in group II at first insemination was I and They were 5.5 (P>0.99) and 2.1 (P>0.95) days shorter than their peers in groups II, respectively, and the live weight at the first fertilization was 10.0 (P>0.99) and 15.5 (P>0.999) kg higher in group I than in groups II and III, respectively. The gestation period of heifers in group I was 16 days shorter than in group II, while in group III there was no significant difference Also, the age of first calving in cows of group II was on average 20.9 (P>0.999) 16.9 days (P>0.99) shorter than in cows of groups I and III, respectively, and their live weight in cows of group I was 26.7 (P>0.99) and 35.1 (P>0.999) kg higher than in cows of groups II and III, which indicates that the reproductive characteristics of the cows were at the level of biological norms.