438.

Vohra P, Kratzer FH. Zinc, copper, and manganese toxicities in turkey poults and their alleviation by EDTA. Poultry Sci. 1968; 47(3):699-704. (CA69) [Turkey poults can tolerate dietary levels of 4080, 2000, and 676 ppm. of Mn, Zn, and Cu, resp. A growth depression caused by 4000 but not by 8000 ppm. Zn was overcome by 15.4 to 30.8 millimoles EDTA/kg. diet. No mortality was observed even at 10,000 ppm. Zn. Copper caused growth depression at about 900 ppm., increased mortality at 1620 ppm. and was lethal at 3240 ppm. Survival was increased but Cu toxicity was not overcome entirely by EDTA. A growth depression was observed at 4800 ppm. Mn.]

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