A.S. Series 73-22
Previous studies have shown that adding copper, as copper sulfate, to raise the copper level to 120 ppm in low and high protein diets resulted in Increased weight gains and reduced incidence of aortic ruptures. Without copper additives the diets contain 8 to 12 ppm Cu. In all previous studies, 4-nitrophenylarsonic acid was used as a blackhead preventative. It is acknowledged that "4-nitro" depressed growth. Also sulfate ions, from various sources, have shown a sparing effect on the sulfur amino acids, thereby promoting growth. These facts raised several questions. Does the added copper promote growth by suppressing toxicity of "4-nitro" or by adding sulfate ions to the diet? Also, does the added copper increase the amount of copper stored in the liver?
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Department of Animal Science, Agricultural Experiment Station, South Dakota State University
Guenther, E. and Carlson, C. W., "Some Effects of Copper Sulfate, Copper Oxide and 4-Nitrophenylarsonic Acid on Aortic Rupture and Growth of Turkeys" (1973). South Dakota Poultry Field Day Proceedings and Research Reports, 1973. 11.