MEAT PRODUCTIVITY OF SHEEP OF DIFFERENT GENOTYPES
The article presents the results of studying the8 main indicators of meat productivity of crossbred young animals obtained as a result of crossing fine-fleeced queens with rams of the Dzhalginsky and Stavropol breeds. The effectiveness of the use of sheep-producers of the Dzhalginsky merino breed on sheep of the Soviet Merino breed has been experimentally proven, in order to increase the slaughter qualities, morphological and varietal composition of carcasses in the resulting offspring. Introduction. The economic priorities of the sheep industry have changed. Animals with a combined nature of productivity have become more in demand due to their higher competitiveness and thus provide the necessary level of efficiency of sheep breeding. Subsidies paid for the wool produced do not fully cover the costs of merino wool production, but contribute to the formation of the overall profitability of sheep farming. From this we can conclude that in this segment of sheep breeding it is important, without losing the level and quality of wool productivity, to increase meat productivity. The purpose of the scientific experiment was to compare the productive qualities of the crossbreeds obtained from crossing the breeds Soviet merino, Dzhalginskaya and Stavropol. Object. The object of research was crossbred sheep of 6 months of age. Material and methods. To study the issue, 3 groups of sheep with 70 heads aged from 3.5 to 4.5 years were formed according to the 1 principle of analog groups. In all three groups, sheep of the Soviet Merino breed acted as the mother base. Soviet Merino sheep (control group), as well as Dzhalginsky merino and Stavropol breeds were selected for insemination of ewes. Experimental groups of sheep with genotypes were formed from the resulting lambing of young animals: Soviet Merino; 1/2 Stavropol + 1/2 Soviet Merino, 1/2 Dzhalginsky merino +1 /2 Soviet Merino. At the end of the planned growing period, a control slaughter of sheep was carried out. A comprehensive assessment of the meat productivity of sheep was carried out by assessing the live weight before slaughter and post-slaughter determination of carcass mass, internal fat mass, ratio in carcass pulp and bones, meat yield by grade. Results and conclusions. The young animals of the experimental groups had superiority over the control in terms of lifetime indicators of meat productivity. Differences remained in the post-slaughter characteristics. Animals 2 and 3 groups were distinguished by the highest yield of cuts of the first grade. This indicator it turned out to be higher than in the control group by 4.5% (half-blooded lambs of the Dzhalginsky breed) and 1.9% (half-blooded lambs of the Stavropol breed). The consequence of the established superiority was a smaller yield of bones from the carcass in these experimental groups of animals. As a result, according to the meat content coefficient, which shows the degree of the ratio of pulp and bones in the carcass, we recorded the superiority of 4 crossbred young animals in the experimental groups. This gives reason to assert that the qualitative characteristics of meat productivity were expressed to a greater extent in the sheep of the 2 experimental group. Thus, the effectiveness of the use of sheep-producers of the Dzhalginsky merino breed has been experimentally proven on sheep of the Soviet merino breed in order to increase the slaughter qualities, morphological and varietal composition of carcasses in offspring.