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Journal of Nutrition Vol. 43 No. 2 February 1951, pp. 223-233
Copyright © 1951 by American Society for Nutrition
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The Tryptophan Requirement of Young Turkey Poults

Three Figures

F. H. Kratzer, D. E. Williams and Blanche Marshall

Division of Poultry Husbandry, University of California, Davis

The tryptophan requirement of young turkey poults for growth was found to be approximately 0.26% of the ration when the basal ration contained gelatin and casein or oxidized casein. When corn gluten feed, meat scrap and gelatin, or corn gluten feed and gelatin were used, the requirement was approximately 0.23% and 0.19%, respectively. D-tryptophan was approximately 30% as active as L-tryptophan in promoting growth in poults.

Manuscript received 18 September 1950.




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