Recent evidence indicates that the net energy (NE) value of soybean meal (SBM) is higher than previously recognized, with data from commercial environments suggesting that its energy value is comparable to, and in some cases may exceed, that of corn. Currently, based on an industry survey it is estimated that half of the U.S. swine industry is now utilizing a SBM NE value that is approximately 97% of corn. This improved understanding of SBM’s energy contribution necessitates corresponding adjustments to the lysine-to-energy and phosphorus-to-energy ratios in swine diet formulations. Thus, industry tools have been developed to facilitate these nutrient adjustments and have been made available to swine nutritionists. In contrast, the value of dried distiller’s grains with solubles (DDGS) have declined in recent years due to oil extraction practices that have reduced its energy content, coupled with growing evidence of reduced pig performance with high DDGS inclusion. Given these trends, soybean meal should be prioritized as the primary supplemental amino acid source, particularly during summer months, to mitigate seasonal declines in growth rate and capitalize on typically higher market hog prices during this period. Furthermore, research suggests a minimum inclusion level of soybean meal is required to optimize growth performance and feed efficiency, with performance penalties for inadequate SBM levels being most pronounced in late-finishing pigs. Collectively, these findings underscore the evolving nutritional and economic importance of soybean meal in modern swine feeding programs.

View the presentation of this abstract here and the interview with Drs. Boyd and Gaines by The Pig Site here.

Gaines, A. and R. Boyd. 2026. New Knowledge on Soybean Meal and Practical Implications to Feed Formulation. ASAS Midwest Section Meeting. Abstract 176. https://doi.org/10.1093/jas/skag107.213