Ufa, Ufa, Russian Federation
The purpose of research is scientifically and practically prove the possibility of increasing the level of meat productivity purebred for young calves at the crossing of Black-motley cows with bulls of the breed Obrac. Research objects are the bulls of Black-motley breed and their hybrids I generation with Obrac breed. For the experience 4 groups of animals were formed: I and III – Black and white breed, II and IV – gobies Оbrac crossbreeds ½ x ½ black-and-white. Bulls of groups III and IV in the 2 months of age were castrated by open way. All experimental animals identical conditions of detention and feed have been established. To monitor the physiological state of an organism of young animals in the winter and in the blood of the summer, blood was taken from the jugular vein before feeding and watering, measured hemoglobin, alkaline reserve, the number of white blood cells, red blood cells, serum – total protein, protein fractions, calcium, phosphorus, , the activity of AST and ALT. Deviations from the physiological norm morphological parameters of blood in the experimental groups of calves during the experiment was not set. Total protein content in serum was higher in summer compared to winter. Increasing the total protein content have purebred calves was 4.1 g/l (5.3%), crossbred steers 3.3 g/l (4.2%), respectively castrates at 4.2 g/l (5.6%) and 4.9 g/l (6.5%). There is a trend increase of enzyme activity in the summer, due to a more active course of metabolism in the body during this season of the year. Purebred and crossbred young are characterized by high adaptive plasticity, as evidenced by morphological and biochemical indices of blood. All quantitative and qualitative changes in the blood were largely seasonal in nature and due to the influence of environmental conditions. Thus all interior change indicators do not go beyond the limits of the physiological norm.
bulls, castrates, hybrids, hematology
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