Trusted information & resources for animal nutrition.

Effect of Excessive Heat on Soybean Meal Quality

Mathai, John K. and co-workers
June 2018

Collaborative research conducted at the University of Illinois and with a commercial company in Germany studied the effects of excessive heat on digestible energy (DE) and metabolizable (ME) and standardized ileal digestibility (SID) of amino acids (AA) in a heat-treated soybean meal (SBM) fed to growing pigs. Nine treatments were prepared using a conventional SBM that was either not autoclaved or autoclaved following one of 8 treatments: 110°С for 15 or 30 min or 150°С for 3, 6, 9, 12, 15 or 18 min. In the first experiment, 20 barrows weighing about 44 kg were assigned to the 10 treatments. A corn-based basal diet and 9 diets containing corn and one of each SBM treatment were formulated. Urine and feces were collected for 5 day. In the second experiment, 10 ileal-cannulated barrows were allotted to the 10 treatments (one N-free diet and nine SBM treatments). Ileal digesta were collected. Results indicated no effects of autoclaving at 110°С on ME or on SID of AA in SBM, but both ME and SID of AA in SBM were less (P ‹ 0.01) if SBM was autoclaved at 150°С compared with 110°С as shown in the following table. At 150°С, there were linear decreases (P ‹ 0.01) in both ME and SID of AA in SBM as heating time increased.

Table 1. Effect of Heat on Metabolizable energy and Standardized Ileal Digestibility of Amino Acids in Soybean Meal

Effect of Heat on Metabolizable energy and Standardized Ileal Digestibility of Amino Acids in Soybean Meal - June 2018