The objective of this study was to determine the metabolizable energy content in ultra-high protein, low oligosaccharide soybean meal (UHPLO-SBM) compared with conventional SBM (C-SBM). In Experiment 1, a precision-fed rooster assay was conducted using Leghorn roosters with intact ceca to determine nitrogen-corrected true metabolizable energy (TMEn). Birds were fasted for 26 h and then precision-fed (crop intubated) with 25 g of UHPLO or C-SBM. Excreta were then quantitatively collected for 48 h. In Experiments 2 and 3, nitrogen-corrected apparent metabolizable energy (AMEn) was determined using ad libitum-fed male broiler chickens (Experiment 2) and female turkey poults (Experiment 3). Birds were provided a nutritionally complete corn-soybean meal-based starter diet until 5 d-of-age. From 6 to 9 d-of-age, birds were provided 1 of 3 experimental diets ad libitum and excreta were collected during the final 48 h. After excreta collection, birds were placed back on the common starter diet until d 17. From 18 to 21 d-of-age, birds were provided experimental diets ad libitum, and excreta were collected during the last 48 h. Diet 1 was a nutrient-adequate corn-soybean meal-based diet. Diets 2 and 3 were the same as diet 1, except 30% of the basal diet was replaced by UHPLO or C-SBM. The AMEn of the test ingredients were calculated by difference using the basal substitution method. Data from Experiment 1 were analyzed using a 1-way ANOVA for a completely randomized design, whereas data from Experiments 2 and 3 were analyzed using a 2-way ANOVA for a 2 × 2 factorial arrangement of treatments with main effects being age and SBM type. The significance value for all analyses was P < 0.05. The UHPLO-SBM contained 57.2% CP and 0.8% crude fat (DM basis), compared with 50.2% CP and 3.0% crude fat in C-SBM. Furthermore, the oligosaccharide content in UHLPO-SBM was reduced by approximately 80% compared with C-SBM. In Experiment 1 with precision-fed roosters, there was no difference (P > 0.05) in TMEn values between C-SBM and UHPLO-SBM (3057 and 3011 kcal/kg DM, respectively). In Experiment 2 with ad libitum-fed broiler chickens, there was no age × SBM interaction (P > 0.05) and UHPLO-SBM contained a greater AMEn value compared with C-SBM (2688 and 2410 kcal/kg DM, respectively at 21 d-of-age). In Experiment 3 with ad libitum-fed turkey poults, there was no age × SBM interaction (P > 0.05) and UHPLO-SBM contained a greater AMEn value compared with C-SBM (2714 and 2567 kcal/kg DM, respectively at 21 d-of-age). In conclusion, UHPLO-SBM contained a greater AMEn compared with C-SBM in both ad libitum-fed broiler chickens and turkeys, indicating UHPLO-SBM has increased nutritional value compared with C-SBM for poultry.
Matusik, K.A. Forga, S. Hufford, E. Zess, M. Begemann, D. Graham and B. Parsons. 2025. Evaluation of metabolizable energy in ultra-high protein, low oligosaccharide soybean meal compared with conventional soybean meal in precision-fed roosters and ab libitum-fed broilers and turkeys. 2025 Poultry Science Association Annual Meeting, Abstract 155