USE OF UNEXTRACTED SOYBEANS FOR CHICKS .1. COMPARISON OF INFRA-RED COOKED AUTOCLAVED AND EXTRUDED SOYBEANS

Several soybean products were prepared from the same sample of beans. These materials included soybean meal, soybean flakes, autoclaved flake soybeans, ground soybeans which had been extruded, and soybeans which had been processed by cooking with IR heat. These were incorporated in practical-type chick diets and fed in both pelleted and mash form. The 3 feeding trials conducted utilized chicks during the age periods of 1-18 days, 28-56 days, and 1-51 days. The data relative to growth rate and feed conversion indicated that the extrusion process produced a product which was capable of supporting chick growth (especially when the diets were pelleted) at least equal and possibly superior to that obtained when soybean meal was used as a source of protein. The IR cooked product was satisfactory in some cases, but appeared to be more variable than the extruded material.