Evaluation of Processed Soybeans and Grains in Diets for Young Pigs

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Abstract
Three feeding trials were conducted to evaluate the performance of pigs fed soybeans and grains processed by various methods. No difference was shown in the performance of 8-kg pigs fed either soybean meal, dry-cooked soybeans or extruded soybeans as the primary protein source. Metabolizable energy of the dry-cooked soybean diet was less than for the diet containing extruded soybeans. In a second trial no improvement was obtained in rate of gain or feed efficiency from extruding sorghum grain (brown seed coat). In a digestion study a significant improvement in the digestibility of energy and nitrogen was obtained in the diets containing extruded sorghum grain as contrasted to the ground form of this grain. Digestibility of energy was not improved in the diets containing extruded soybeans as compared to those diets with soybean meal. All diets containing sorghum grain had lower digestibility of energy and nitrogen than the diet containing corn. Flaked, dehulled soybeans cooked either 12 or 24 min produced significantly faster gains than diets containing flakes cooked 8 or 36 min or soybean meal. Urease content of the soybean flakes which produced the most rapid gains varied from .03 to .05 pH units. Maximum energy and nitrogen digestibility was with the diet containing soybean flakes cooked for 12 minutes. Copyright © 1976. American Society of Animal Science . Copyright 1976 by American Society of Animal Science

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