ISSUE FOCUS FEED & ADDITIVE MAGAZINE April 2025 45 EAA ratios to SID Lys are not well established especially for 7th, 8th limiting amino acids and minimum nitrogen requirements for non-essential amino acid de novo synthesis. CE is a useful tool to examine dietary energy conversion to live weight or carcass. However, we must be cautious as total dietary NE is based on the sum of the individual ingredients which can be misleading. Results of this study support the idea that SBM NE is indeed higher than current NRC (2012) estimate. However, it does not suggest SBM NE is equal to or higher than corn. References 1. Cemin, H., H.E. Williams, M.D. Tokach, S.S. Dritz, J.C. Woodward, J.M. DeRouchey, R.D. Goodband, K.F. Coble, B.A. Carrender and M.J. Gerhart. 2020. Estimate of the energy value of soybean 2. Meal relative to corn based on growth performance of nursery pigs. Journal of Animal Science and Biotechnology (2020) 11:70 https://doi.org/10.1186/ s40104-020-00474-x 3. Holen, J.P., R.D. Goodband, M.D. Tokach, J.C. Woodward, J.M. DeRouchey and J.T. Gebhardt. 2022. Effects of increasing soybean meal in corn-based diets on the performance of late finishing pigs. Trans. Anim Sci. 7, 1-8. https://doi.org/10.1093/tas/txac165 4. NRC. 2012. Nutrient Requirements of Swine. 11th rev. ed. Natl. Acad. Press, Washington, DC. 5. Noblet, J and J. van Milgen. 2004. Energy value of pig feeds: Effect of pig body weight on energy evaluation system. J. Anim. Sci.82 (E Suppl.): E229-E238. 6. Stein, H.H Determination of net energy in U.S. soybean meal fed to group-housed pigs. https://nutrition.ansci.illinois.edu/node/1717 7. Stein, H.H. 2024. Net energy of soybean meal. J. Anim. Sci. Vol. 102, Suppl. S2 P184. Doi. org/10.1093/jas/skae102.205 8. Williams, H.R., M.D. Tokach, J.C. Woodward, J.M. DeRouchey, R.D. Goodband, J.T. Gebhart, C.W. Hastad, Z.B. Post and K.D. Haydon. 2021. Influence of feed grade amino acids level in late nursery and early grower diets fed to pigs from21 to 75 lb. Kansas Agricultural Experiment Station Research Reports: Vol. 7: Iss. 11. https://doi.org/10.4148/2378-5977.8218
RkJQdWJsaXNoZXIy MTUxNjkxNQ==