Economically useful traits of cattle, introduced into the Republic of Tyva

This article presents the results of monitoring changes in live weight and measurements of Kalmyk cattle introduced into the Republic Tuva and provides comparative indicators with the Hereford breed. It was found out that in Kalmyk cows, after feeding, the live weight increased by 45 kg, in producer bulls by 47 kg, in bulls by 49 kg, respectively. Oblique length of the trunk increased by 12 cm, chest girth behind the shoulder blades – by 5 cm, height at the withers – by 3 cm. Comparative analysis showed that Herefords were superior to Kalmyk cows in such measurements as chest girth behind the shoulder blades, and oblique trunk length by 18 and 8,9 cm, respectively. For the most complete analysis, physique indices were calculated. When comparing them, Herefords also had higher indices of elongation (8 %), blockiness (4.4 %) and boniness (2.5 %).