Effects of branched-chain amino acids to lysine ratios in corn distillers dried grains with solubles containing diets on growth performance, plasma nitrogen profile, carcass traits, and economic analysis in growing-finishing pigs

Abstract A study was conducted to identify the effects of standardized ileal digestible (SID) branched-chain amino acids (BCAA):lysine (Lys) ratios on growth performance, plasma nitrogen (N) profile, carcass traits, and economic analysis growing–finishing pigs fed diets with high corn distillers dried grains solubles (cDDGS) inclusions. total 1,140 (initial body weight [BW] = 28.7 ± 2.0 kg) were housed in 45 pens 25 or 26 one five a randomized complete block design. Experimental four phases based BW. Dietary treatments corn–soybean meal (SBM) diet (PC), corn–SBM-cDDGS-based (NC) SID BCAA:Lys ratio PIC (2020) recommendation NC targeted for 73% Val:Lys, 60% Ile:Lys, 144% Leu:Lys during growing (25 80 kg, Grow), 78% 70% 160% 170% finishing (80 120 finish), both (Grow–Finish). One pig from each pen bled at end 7 13 wk. After 11-wk-feeding trial, sent commercial abattoir investigate traits. Pigs Finish had greater overall average daily gain (P < 0.05) than other cDDGS diets. did not affect hot weight. However, feeding increased iodine value pork belly samples decreased yield. The urea (PUN) concentration phase concentrations Leu Val compared Feeding different no difference income over feed cost facility costs corn–SBM diet. Therefore, adjusted previously determined (from kg BW) recommendations by SBM inclusion supported performance benefits equal