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The Value of Soybean Oil Meal, Low Gossypol (Degossypolized) Solvent Processed Cottonseed Meal, Low Gossypol Expeller Processed Cottonseed Meal, and Various Blends Thereof in the Ration of Growing-Fattening Swine¹

Florida Agricultural Experiment Station²

Abstract

Using 72 weanling pigs fed in drylot, an experiment has been conducted to study the feeding value of two low gossypol cottonseed meals as compared to a good quality soybean oil meal. It was also possible to compare the growth stimulating value of procaine penicillin with a combination of procaine penicillin and erythromycin.

The results conclusively demonstrated that a degossypolized solvent extracted cottonseed meal (free gossypol content of 0.01% and nitrogen solubility 89.0%) was superior to an expeller cottonseed meal (free gossypol content of 0.01%, and nitrogen solubility of 42.2%). When either of the cottonseed meals was partially replaced (25, SO or 75%) with soybean oil meal the gains were significantly improved. In the case of the degossypolized solvent cottonseed meal it was observed that the combinations were equal or superior to soybean oil meal only.

The feeding of erythromycin in combination with procaine penicillin as an antibiotic fortification produced faster gains with all nine rations than did the feeding of procaine penicillin alone.

The results of this study indicate that low gossypol cottonseed meal can be used to good advantage as a protein supplement for weanling pigs, either as the sole source of supplementary protein or in combination with soybean oil meal. The most efficient rations in this study were those containing mixtures of the degossypolized solvent meal and soybean oil meal.

¹ Florida Agricultural Experiment Station Journal Series No. 508.

² Department of Animal Husbandry and Nutrition, Gainesville. This study was supported in part by a grant from the Eli Lily Company, Indianapolis, Indiana.