The Use of Unextracted Soybeans for Chicks

Abstract

SOYBEAN meal has long been used as a primary protein source in poultry diets. However, a great deal of interest has developed in recent years in the use of unextracted soybeans to take advantage of the energy contribution of the oil and eliminate the cost of extraction. Studies to date have been concerned with heating conditions (Stephenson and Tollett, 1959; Renner and Hill, 1960) and the use of mechanical pressure or flaking to maximize performance of chicks fed unextracted soybeans (Carew et al., 1959, 1961; Renner and Hill, 1963; Carew and Nesheim, 1962). More recently, infra-red cooking has been evaluated as a means of processing unextracted soybeans for poultry (Featherston and Rogler, 1966). Chicks fed infrared heated beans grew as rapidly as those fed a cornsoybean meal diet. However, when soybean oil was added to the cornsoybean meal diet to maintain diets isocaloric, the heated beans did not support a . . .