A.S. Series 76-9
Previous experiments at this station have shown that we can expect a growth response of approximately 500 grams at maturity when extra copper (120 ppm of the diet) is fed to growing turkeys. This response is usually manifested during the later part of the growing period. Liver tissue analyses indicate that this level of dietary copper does not increase the amount of tissue copper. Since the extra copper apparently is not absorbed by the animal, perhaps part of the beneficial response comes from the effect of copper on the feed itself, i.e., by preventing growth of undesirable organisms. However, concern has been voiced that the extra copper in the manure of turkeys thus fed constitutes a pollutant and an environmental hazard. For this reason a fungicidin (Nystatin) was evaluated as a possible alternative for copper.
Department of Animal Science, Agricultural Experiment Station, South Dakota State University
Guenthner, E. and Carlson, C. W., "Copper and Nystatin for Growing Turkeys" (1976). South Dakota Poultry Field Day Proceedings and Research Reports, 1976. 10.