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Department of Poultry Husbandry, University of California, Davis
The secretion of endogenous phosphorus into the digestive tract of turkeys was studied following intravenous injection of labeled phosphate (P32). The duodenum receives most of the secretion, as is the case with mammals having a simple stomach (e.g., swine). Very little phosphorus secretion was indicated in the ceca, although their contents have the highest phosphorus concentration of any part of the digestive tract. Appearance of endogenous phosphorus in the colon is associated with entry of urine into that organ.
Manuscript received 18 September 1956.