Metabolism and Nutrition III: Nutrition

higher NDF content than samples from C with samples from A being intermediate (12.0 vs. 8.4 vs. 9.3%; P ≤ 0.001). The Ca (0.43 vs. 0.31 and 0.40%) and K (2.52 vs. 2.11 and 2.21%) content were higher in A samples than in B samples, with C samples being intermediate (P ≤ 0.01). The C samples had higher PDI (22.6 vs. 15.2 vs. 20.1%) and TI content (3.9 vs. 2.8 and 3.4 g/kg) than B samples with A samples being intermediate (P ≤ 0.001). In addition, C samples had higher KOH (87.6 vs. 83.9 and 84.8%; P ≤ 0.001) than A and B samples. The TI content was positively correlated with PDI (r = 0.67; P ≤ 0.001) and KOH (r = 0.75; P ≤ 0.001). In addition, PDI was positively correlated with KOH (r = 0.52; P ≤ 0.001). Finally, lysine (r = 0.31) and methionine (r = 0.40) were lower in those samples with lower KOH (P ≤ 0.001). In summary, the origin of the soybean meal influences nutrient content and the value of the parameters used to evaluate protein quality.