J. Anim Sci.
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J. Anim Sci. 1957. 16:364-369.
© 1957 American Society of Animal Science
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Effect of Protein Level in the Ration on Gossypol Tolerance in Growing-Fattening Pigs

Fred Hale and Carl M. Lyman1

Departments of Animal Husbandry and Biochemistry and Nutrition Texas Agricultural Experiment Station,2

Abstract

Restriction of the free gossypol content of the ration to 0.01% or less provided a safe level for feeding cottonseed oil meal to growing-fattening pigs. Such rations may be self-fed in self-feeders with good results.

Although levels of free gossypol above 0.01% resulted in toxicity symptoms and death of some of the pigs in each group, none of the pigs receiving the 30% protein ration showed any symptoms of toxicity whatsoever.

Animals which died on the 15% protein ration consumed up to 39.6 gm. of free gossypol. Every pig in the groups fed 30% crude protein ration (and with either 0.02% or 0.03% free gossypol in the ration) consumed more free gossypol than did any of the pigs which died on the 15% crude protein ration.

When the low free gossypol cottonseed oil meal was fed, the pigs gained as well on the half cottonseed oil meal-half soybean oil meal supplement as did the pigs on the soybean oil meal alone supplement.

Footnotes

1 Post mortem examinations of pigs which died during the experiments were conducted by Harold E. Redmond. The authors wish to express their appreciation to Dr. Philip D. Aines and the Buckeye Cotton Oil Division of the Buckeye Cellulose Corporation for the pilot plant preparation of solvent extracted cottonseed oil meal of high free-gossypol content.

2 Texas A. & M. College System, College Station.






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Copyright © 1957 by the American Society of Animal Science.