Extruded-Expelled Soybean Meal-Swine

Two experiments were conducted comparing the use of extruded-expelled soybean meal to solvent-extracted soybean meal in swine diets. In a nursery study, they compared solvent-extracted soybean meal with added fat to extruded-expelled soybean meal processed at temperatures ranging from 143.3 to 165.6°C. Results indicated no differences in average daily gain or average daily feed intake for the twenty-day experiment. Based on feed efficiency improvements, they found the optimum processing temperature for the extruded-expelled meal to be 148.9 to 154.4°C. In the growing-finishing experiment they reported that increasing dietary energy density of the diet by using extruded-expelled soybean meal, or feeding soybean meal with added fat, had no effect on average daily gains (P>0.61), while reducing average daily feed intake (P>0.05), and improving feed efficiency (P>0.02). In this experiment, carcass leanness was not affected by dietary treatment.

Webster, M.J., and co-workers. 2005. Evaluating processing temperature and feeding value of extruded-expelled soybean meal on nursery and fishing pig growth performance. J. Animal Sci. 81(8): 2032-2040.