Supplementation of a Corn-Meat and Bone Scrap Ration for Weanling Pigs

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Abstract
A corn-meat and bone scrap ration supplemented with minerals and vitamins was found to be inadequate for the growth of pigs fed in drylot. Addition of 0.06% of DL-tryptophan to this ration allowed growth to proceed at the same rate as that observed on a corn-soybean oil meal diet. When half of the meat and bone scrap protein was replaced with soybean oil meal protein, growth equaled that obtained in the corn-soybean oil meal lot. Aureomycin was not effective in counteracting the tryptophan deficiency of the basal ration.