The efficiency of breeding of cattle of the Yenisei type of red and motley breed in bf JSC “Solgon”

Specific weight of red and motley breed of intra pedigree Yenisei type in the structure of bred breeds of cattle in Krasnoyarsk Region for the beginning of 2019 makes 70 %. In coming years the livestock of red and motley breed will increase by 11-12 % at the expense of ongoing holsteinization of Simmental cattle and the transfer of hybrids to red-and-white breed, and therefore there is an increased interest of regional animal breeders. The purpose of the researches was to carry out the as- sessment of meat and dairy efficiency of cowsheifers of the Yenisei type of red and motley breed depending on the age of the first insemination and their live weight. Scientific researches were conducted in the conditions of JSC ‘Solgon’ of Uzhur area of Krasnoyarsk Region in the groups of heif-ers, coupled at the age of 13-18 months with a live weight of 382-472 kg and the cows-heifers who calved at the age of 22-27 months with a live weight from 534 to 551 kg. The heifers from birth to calving had the greatest daily live weight gain (752 g), in heifers that calved at 22 months of age, with the increase in age of calving daily live weight gain decreased...