Quantitative Relation of EDTA to Availability of Zinc for Turkey Poults.

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Abstract
Summary Various levels of EDTA and zinc were added to the poult diet containing isolated soybean protein. One hundred mg of EDTA/kg were equivalent to approximately 8 mg/kg zinc in supplementing the basal diet. When 7 or 10 mg of zinc/kg were added to the diet, 100 mg of EDTA/kg were equivalent to approximately 19 mg of zinc/kg. The data indicate that EDTA improves the effectiveness of added zinc as well as increasing the utilization of zinc already present in the basal diet. Perosis increased as the zinc level of the diet increased to approximately 30 mg/kg and decreased as zinc was added above this level.