INFLUENCE OF VITAMIN E AND ANTIOXIDANT ON THE RESPONSE OF DIETARY SELENIUM BY THE CHICK AND THE BIOLOGICAL ACTIVITY OF SELENIUM IN FEED GRAIN

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Abstract
Broiler chicks were used to determine the influence of dietary selenium, vitamin E, and antioxidant on the incidence of exudative diathesis, and the activity of selenium present in feed grain in two experiments. Chicks were depleted of selenium by feeding a selenium-deficient diet for 10 days. Following the depletion period, chicks were fed different levels of selenium with and without vitamin E and antioxidant in the first experiment. Results showed that the incidence of exudative diathesis decreased as selenium was increased in the diet. The addition of vitamin E, or antioxidant, or both, reduced the incidence of exudative diathesis at each level of dietary selenium. The second experiment was an evaluation of selenium supplied by feed grain compared with dietary sodium selenite supplied at various dietary levels on the response of exudative diathesis and other response measurements in the chick. Results indicated that grain samples grown in a specific locality showed a similar selenium content irrespective of variety. Samples grown in different areas showed a wide range in the selenium content. Biological activity of selenium as measured by the incidence of exudative diathesis indicates that 100% of the mineral was biologically active in six samples, two samples showed 62 and 69% activity, and two showed 144 and 178% activity values.

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