SOME BIOLOGICAL CHARACTERISTICS OF SHEEP OF VARIOUS ORIGINS
The article presents experimental data characterizing the natural resistance and hematological parameters of the blood of merino sheep obtained in various mating variants. Introduction. The basis of the development of the organism is not only quantitative, but also qualitative characteristics (morphological composition of blood, metabolism, resistance, etc.), which determines the productivity of the animal. Materials and methods. Scientific and production experiments were conducted on the basis of the Limited Liability Company «Belozernoye» of the Salsky district of the Rostov region. 4 bright groups were formed: 1 - control, purebred animals of the Salsk breed (SA); 2 - two-breed bright (1/2 C x 1/2 C); 3 - two-breed bright (1/2 C x 1/2 C); 4 - three-breed bright (1/4 C +1/4 C+1/2 C). Hematological parameters were determined in females at the age of 4 months, using generally accepted methods of analysis. Results and conclusion. When examining the blood, it was found that all hematological parameters were within the normal range, which indicates the clinical health of the experimental young. A comparative study of the indicators of humoral protection factors showed that the serum of crossbred yarok obtained with the use of sheep-producers of the Dzhalginsky merino breed had higher bactericidal, lysozyme and phagocytic activity, compared with purebred peers. At the same time, in the studied groups, an increased number of red blood cells in the blood and their maximum saturation with hemoglobin were noted, respectively, the body's resistance is better and the high potential of productive qualities of animals are also higher.