Utilization of Unextracted Soybeans by Broiler Chicks

Abstract

NUMEROUS workers have reported on various ways to utilize unextracted soybeans in chick diets. These methods, which have included autoclaving, cooking, extruding, infra red cooking, and mechanical flaking and pelleting, have been extensively reviewed by Featherston and Rogler (1966) and White et al. (1967). The latter report was largely concerned with two processes for preparing unextracted soybeans, namely, infra red cooking and extruding. They found that these two methods of preparation supported maximum chick growth when compared to those fed diets containing solvent extracted soybean meal. The experiments reported herein were conducted to further evaluate these two methods of processing unextracted soybeans for broiler diets and to determine the influence of pelleting and regrinding on the nutritive value of diets containing various soybean preparations. MATERIALS AND METHODS Experiment 1. In this and the subsequent experiment in this report, solvent extracted soybean meal and raw whole soybeans were obtained from the