A.S. Series 70-32
Recent research with growing pigs has shown that vitamin E may be deficient in some corn-soybean meal diets. Some possible reasons why vitamin E deficiencies are being experienced today are that fewer pigs are fed on pasture, which is a good source of vitamin E; more corn is being picked wet and then artificially dried, which can destroy vitamin E; and the presence of a low selenium content of corn.
Copper has been shown to produce a growth response similar to antibiotics when it is fed at levels of 125 to 250 ppm. the study reported herein was conducted during the winter of 1969-70 to study the effects on growing-finishing swine of supplementing diets with vitamin E, copper, tylosin and combinations of these ingredients.
Number of Pages
Agricultural Experiment Station, South Dakota State College
Libal, George E. and Wahlstrom, Richard C., "Vitamin E, Copper, and Tylosin in the Diets of Growing-Finishing Swine" (1970). South Dakota Swine Field Day Proceedings and Research Reports, 1970. 5.