This article presents a comparative characteristic of the blood parameters of Kuibyshevskaya breed rams and Kuibyshevskaya ? Dorper crossbreed rams at the age of one and four months. According to the results of the studies, the amount of formed elements and the level of metabolites in the blood of animals corresponded to the physiological norm. At the same time, there were differences between the study groups. It was found out  that crossbred rams had superiority in some blood parameters over purebred animals, which indicates a more intensive metabolism, and, presumably, a higher level of meat productivity in the future.

Представлены данные мясной продуктивности баранчиков эдильбаевской породы одинцового и двойневого типа рождения. Исследования проводились в СПО «Камышинское» Камышинского района Волгоградской области. У животных опытных групп были изучены следующие показатели: живая масса, масса туши и внутреннего жира, масса курдюка, убойная масса, содержание мякоти, убойный выход и коэффициент мясности. Установлено, что производство баранины в убойной массе в расчете на одну овцематку при рождении баранчиков двойневого типа рождения возрастает до 33,54 кг, или на 52,66 % больше, чем при рождении баранчиков-одинцов.

The dynamics of live weight and slaughter indicators of Kazakh white-headed bulls were studied when the vitamin and mineral premix was introduced into the diet. Animals that were fed with a premix in a concentration of 1% along with the main diet exceeded their peers in live weight at the age of eight months by 4.38 kg (2.03 %), and at 18 months, at the end of the experiment, by 20.4 kg (3.89%). Control slaughters showed that the slaughter weight of the bulls of the experimental group was better than the control by 25.27 kg (7.64 %), and the superiority in slaughter yield was 2.49 %.

The article presents data on the characteristics of growth and development, as well as on the formation of meat productivity of rams of the Edilbay breed of different types of birth. The studies were carried out in the SPA “Kamyshinskoye” of the Kamyshin district of the Volgograd region on the Edilbay rams of single and double birth types. During the experiment, the indicators of live weight, basic measurements of the physique were determined, and the physique indices of the experimental rams at the age of 4 and 7 months were calculated, after which control slaughter was carried out.

Hematological and biochemical parameters of the blood of bulls of the Kazakh white-headed breed were studied after the introduction of the vitamin-mineral premix "SulfVita" into the diet. Animals that received the premix "SulfVita" along with the main diet, at a concentration of 1%, surpassed their peers in terms of hemoglobin and erythrocyte levels, and the intensity of protein metabolism.