Effects of Increasing Soybean Meal in Corn-Wheat Midds-Based Diets on Growth Performance and Carcass Characteristics of Late Finishing Pigs

A total of 786 pigs (PIC TR4 × (Fast LW PIC L02); initially 213.2 lb ± 2.37 lb) were used to evaluate the effects increasing soybean meal (SBM) in corn-wheat middsbased diets on growth performance late finishing pigs. Pens blocked by BW and randomly assigned 1 5 treatments with 9 replications per treatment. Experimental corn-based 30% wheat midds. Soybean levels increased from 0 16% replacing added feed grade AA. weighed ADG, ADFI, F/G. Data analyzed GLIMMIX procedure SAS pen was considered as experimental unit. The statistical model fixed dietary treatment, linear, quadratic, cubic contrasts, random block. Overall, final (linear, P < 0.05) SBM increased. Additionally, overall ADG F/G improved (linear cubic; no differences ADFI. Although formulated exceed minimum NRC nutrient requirement estimates, we suspect that Trp:Lys ratio diet may explain responses observed. These results suggest corn-soybean meal-based midds for should contain at least 4% SBM.