EXTERIOR AND DAIRY PRODUCTIVITY OF GOLSHTINSKY COWS OF DIFFERENT GENERATIONS IN LLP "DAIRY FARM" AINA "

Abstract

The study showed that linear measurements of cows of different generations have certain differences. Heifers 2nd generation outnumbered the girls by measurements: the height at the withers – 1.9 cm peers 1st generation and 1.4 cm – 3 of the second generation, the width of the chest – 0.12-2,27 cm , oblique body length – 1.27 - 6,34 see In terms of width in makloks, they exceeded by 0.23-0.58 cm the peers of the 3^rd generation, but were inferior to the peers of the 1st generation by 0.46 cm. The girth of the pastern in the first heifers of the 3rd generation was 0.41 cm larger than in the first heifers of the 1st generation and 0.37-0.45 cm smaller than in the peers of the 2nd generation. According to the physique indices, it can be concluded that Holstein cows of all 3 generations have a proportional physique, corresponding to cows of the dairy direction of productivity. Milk productivity of first-generation heifers was 5253 kg, milk fat content 3.22%, protein content 3.19%, lactose content 4.81%, second generation heifers 5230 kg, milk fat content 3.2%, protein content 3.11%, lactose content 4.96%, third-generation heifers 5378 kg, milk fat content 3.38%, protein content 3.22%, lactose 4.91%.