Exterior features of broiler chickens when seleniumcontaining feed additive is included in the diet

. Increasing the efficiency of industrial poultry farming depends on the level of functional activity of poultry organism, conditions of keeping, balanced feeding, timely and qualitative veterinary and sanitary measures. Stress-factors and other unfavorable environmental influences lead to weakening of resistance of poultry organism and, as a consequence, to decrease of productive potential, level of profitability of egg and meat production. To optimize metabolic processes, improve feed conversion, adaptive capabilities of poultry, feed additives with high biological activity are widely used in production. The effect of selenium-containing feed additive selenium on growth, development and exterior features of broiler chickens was studied. Three groups of day-old chickens were formed: control and two experimental groups. Poultry of the I experimental group together with feed received the drug in the amount of 30 g/t feed, broilers of the II experimental group - 50 g/t. Chickens of the control group were not given the preparation. It was found that the use of seleniumcontaining preparation in the diet of broiler chickens promoted a reliable increase in live weight by the end of growing. Indicators of absolute and average daily weight gain were higher in birds of experimental groups by 165.10-181.30 g and by 8.15-8.98 %. Maximum values of measurements were recorded in birds receiving selenium: body length increased by 1.99-2.25 %, keel length - by 2.14-2.31 %, breast girth - by 8.32-8.72 %, breast width - by 1.21-1.87 %, breast depth - by 11.33-11.62 %, pelvic width in maclocks - by 2.96-3.46 %, tibia and tarsal length - by 1.42-2.23 % and 0.87-1.12 %. The broilers of the experimental groups had an advantage in most of the exterior parameters.