USE OF CROSSBRED RAMS (½KALMYK FAT-TAILED + ½ DORPER) ON EWES OF FINE-WOOLED AND COARSE-WOOLED BREEDS FOR PRODUCTION OF YOUNG LAMB.

Abstract

Currently, there is an acute global problem of providing the population with high-quality
meat products in Russia. Dorper sheep were brought to the Republic of Kalmykia. This breed
has been recently revealed in Russia and there is little open information about crossing it with
other breeds. The purpose of this work is to study the effectiveness of crossing ewes of the
following breeds: Soviet merino and Kalmyk fat-tailed with crossbred rams (½ Kalmyk fattailed × ½ Dorper). The research was carried out on the basis of the breeding factory LLC
"Agrofirma Aduchi", Republic of Kalmykia in 2018 - 2019. It was found that the crossing of
Soviet merino ewes and Kalmyk fat-tailed breed with crossbred rams (50% Kalmyk fat-tailed
× 50% Dorper) had a positive effect on reproductive qualities. The highest fecundity was
observed in ewes from the second group and reached 107.69%, while in the third group it was
105.26%, which is higher than in the first control group by 5.06 and 2.63 abs.%. The produced
crossbred young cattle has increased growing power and superior live weight in comparison to
their purebred herdmates of the Kalmyk fat-tailed breed in terms of all studied periods. In terms
of the average daily gain in live weight at 4 months of age, the animals of the third and second
groups were superior than the control group animals by 12.67 (P> 0.999) and 11 g (P> 0.999),
and in just 6 months of rearing, by 10.45 and 7, respectively. 78g (P> 0.999).