Gland-Free Cottonseed Meal as a Protein Supplement for Chickens

Abstract

Boatner and Hall (1946) described a method for removing from cottonseed the pigment glands containing gossypol gossypurpurin. Two samples of solvent-extracted, raw, gland-free meal and one sample of hexane-extracted raw meal containing glands were furnished by the Southern Regional Research Laboratory, Bureau of Agricultural and Industrial Chemistry, New Orleans, La., for feeding experiments. The extracted raw meal contained 0.80 percent of gossypol, 52.0 of protein and 9.33 of moisture. Samples 1 and 2 of the gland-free meal contained respectively 0.007 and 0.018 percent of gossypol, 58.1 and 59.9 of protein, and 1.93 and 1.56 of moisture. These meals were compared with commercial cottonseed and soybean meals using the diets for chicks and for hens described by Rubin et al. (1946) except that choline was omitted from the diet of the chicks. The dietary variants are indicated in Tables 1 and 2. Supplements of dried cow manure and a growth-factor concentrate . . .