Special Solvent Cottonseed Meal with and without a Vitamin B12 Supplement and Streptomycin as a Source of Protein for Pigs1

Abstract

As high as 35% of the total ration was fed as “detoxified” cotton seed meal to weanling pigs. No typical symptoms of gossypol toxicity occurred. However, dermatitis, depigmentation of the hair coat of the Duroc pigs, a slow rate of growth as well as a reduction in feed efficiency were encountered. These deficiency symptoms suggest that this “detoxified” cottonseed meal is deficient in factors essential for optimum growth and physiological well-being of the pig. Results of this test indicate that neither vitamin B₁₂ nor streptomycin are the first limiting factors. When cottonseed meal and solvent soybean oil meal were fed together (each comprising 50% of the protein supplement), the soybean oil meal apparently supplied some factor(s) in which cottonseed meal was deficient. Copyright © . .