Chygryn A. Productivity, egg quality and layer metabolism at different levels of vitamin E and selenium in a ration

Research object are layers of 38th line of Rod-island breed. The zootechnical, biochemical and biophysical metods of researches are used. The processing of experimental data was carried out biometric metod. The novelty consist in the obtaining of research data with the selenium additives and their influence on productivity, physiological and biochemical date of an organism of layers and biological value of table eggs. The optimum levels of the used additives which provide increase of the contents of a a-tocopherol in a eggs yolk and do not influence negatively their quality and physiological condition of an hen organism are determined. The introduction is carried out at the poultry farm "Ukraine" of the Kiev s region. Agriculture, feeding of animals