СОВЕРШЕНСТВОВАНИЕ СКОТА КРАСНОЙ СТЕПНОЙ ПОРОДЫ ГОЛШТИНСКИМИ БЫКАМИ В УСЛОВИЯХ ЦЕНТРАЛЬНОГО ПРЕДКАВКАЗЬЯ
In the conditions of Kabardino-Balkaria Republic, experience has been gained in improving the cows of the red steppe breed by Holstein bulls and at present there is a large mass of cross-breed offspring of different blood levels for the improving breed, but their main economically useful traits are still poorly understood. In the article, that crossbred animals obtained by crossing red steppe cows with Holstein bulls red and white suit increases the intensity of growth of heifers, milk yield
... fers, milk yield and feed milk compared to purebred peers. For the entire period of cultivation from birth to 18-month-old hybrids by 5.0% or 29.4 kg on average superior to purebred. Milk yield of crossbred animals was 465 kg or 10.9 % higher than that of purebred animals. When crossing red steppe cows with Holstein bulls, the number of cows with the most desirable forms of udder increases. Crossing with Holstein has no significant effect on the density and acidity of milk of crossbred heifers. More uniform development of the udder differed crossbred heifers, whose milking intensity was 1.43 kg/min, which is 3.6 % higher than that of purebred peers. The first ones were characterized by higher indices of the udder index. It is established that cross-bred animals differed in the best payment of a forage milk. Thus, cows of the experimental group spent 1.10 EKE on the production of 1 kg of milk, which is 0.15 EKE less than the first-calf heifers of the control group.