Influence of extruded soybean meal with varying fat and oleic acid content on nitrogen-corrected apparent metabolizable energy in broilers

Authors: ALI, MUHAMMAD - North Carolina State University; JOSEPH, MICHAEL - North Carolina State University; ALFARO-WISAQUILLO, MARIA CAMILA - North Carolina State University; QUINTANA-OSPINA, GUSTAVO ADOLFO - North Carolina State University; PEÑUELA-SIERRA, LINA-MARIA - North Carolina State University; PATINO, DANNY - North Carolina State University; Vu, Thien; Mian, Rouf; Toomer, Ondulla; OVIEDO-RONDON, EDGAR ORLANDO - North Carolina State University

Submitted to: Poultry Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/22/2023
Publication Date: 3/1/2024
Citation: Ali, M., Joseph, M., Alfaro-Wisaquillo, M., Quintana-Ospina, G., Peñuela-Sierra, L., Patino, D., Vu, T.C., Mian, R.M., Toomer, O.T., Oviedo-Rondon, E. 2024. Influence of extruded soybean meal with varying fat and oleic acid content on nitrogen-corrected apparent metabolizable energy in broilers. Poultry Science. 103(3):103408. https://doi.org/10.1016/j.psj.2023.103408.
DOI: https://doi.org/10.1016/j.psj.2023.103408

Interpretive Summary: New high oleic soybean cultivars may serve as a value-added feed ingredient for broiler chickens as a means to enhance poultry growth performance. Therefore, we aimed to conduct a 23-day broiler feeding trial to determine the nutrient digestibility of full-fat soybean meal prepared with high oleic soybeans. Broilers fed the full-fat high oleic soybean meal and full-fat conventional soybean meal diets had greater apparent metabolizable energy as compared to broilers fed conventional defatted soybean meal. This study implies that full-fat soybean meal prepared with high oleic soybeans could potentially serve as a valuable alternative poultry feed ingredient to conventional defatted soybean meals in broiler diets providing higher levels of dietary energy.

Technical Abstract: High oleic (HO) soybeans may serve as a value-added feed ingredient; providing amino acids and estimating their dietary energy value for broilers is essential. In this study, we determined the apparent metabolizable energy (AME), AME corrected for zero nitrogen retention (AMEn), digestibility, and nitrogen (N) retention of HO full-fat (HO-FF) soybean as compared to solvent-extracted soybean meal (SE-SBM), normal oleic full-fat (NO-FF) and extruded expeller (NO-EE) soybean. A total of 240 Ross-708 male broilers were selected, with 8 replicates per treatment and 6 chicks per cage. The AME and AMEn were estimated using the difference method with a 30% inclusion of test ingredients using a corn-soy reference diet with partial and total excreta collection. The index method with partial excreta collection used titanium dioxide as an inert marker. The same starter diet was provided for all birds for 14 d, followed by the reference and assay diets for the next 6 adaptation days. Total excreta were collected twice a day for 3 d. The AME and AMEn values determined for the HO-FF and NO-FF were higher (P < 0.001) than the NO-EE and SE-SBM. The AME of SE-SBM and NO-EE were similar with both methods, but the AMEn of SE-SBM was lower than the NO-EE only with the partial collection method. The agreement between AME and AMEn values determined by partial and total excreta collection analysis was 98%. Data from the total excreta collection method yielded higher AME and AMEn values (P < 0.001) than those from the partial collection method. In summary, HO-FF and NO-FF soybean meals had similar AME and AMEn values. The HO-FF soybean had 39 and 24% higher AME and AMEn than SE-SBM. Hence, high oleic full-fat soybean meal could serve as a valuable alternative feed ingredient to conventional SE-SBM meals in broiler diets, providing additional energy while providing amino acids and more oleic acid to enrich poultry meat products.