Amino acid digestibility and energy concentration in a novel source of high-protein distillers dried grains and their effects on growth performance of pigs

Abstract

Three experiments were conducted to evaluate a novel source of high-protein distillers dried grains produced by Buhler Inc. (HP-DDG(Buhler)) and fed to growing pigs. The standardized ileal digestibility (SID) of AA in HP-DDG(Buhler) and in soybean meal (SBM) was determined in Exp. 1. Nine pigs (109.8 +/- 2.78 kg of BW) were fitted with a T-cannula in the distal ileum and allotted to a triplicated 3 x 3 Latin square design with 3 diets and 3 periods per square. Diets containing HP-DDG(Buhler) or SBM as the only source of AA and an N-free diet were formulated. The SID of indispensable AA was less (P < 0.01) in HP-DDG(Buhler) than in SBM (Arg, 87.5 vs. 93.9%; His, 76.7 vs. 88.7%; Ile, 76.4 vs. 87.5%; Leu, 77.8 vs. 86.8%; Lys, 75.4 vs. 88.4%; Met, 82.8 vs. 88.4%; Phe, 77.9 vs. 87.3%; Thr, 72.5 vs. 83.5%; Trp, 85.1 vs. 91.0%; Val, 73.3 vs. 84.3%). The DE and ME in HP-DDG(Buhler) and in corn were measured in Exp. 2 using 16 growing barrows (24.6 +/- 1.66 kg of BW). A corn-based diet and a diet containing 50% corn and 48.2% HP-DDG(Buhler) were formulated. The total collection method and the difference procedures were used. The concentrations of DE and ME in HP-DDG(Buhler) were greater (P < 0.001) than in corn (5,043 vs. 4,002 kcal/kg of DM and 4,690 vs. 3,921 kcal/kg of DM, respectively). Experiment 3 was a 9-wk growth assay using 40 pigs (initial BW: 58.2 +/- 2.28 kg) allotted to 5 dietary treatments, with 8 replicates of individually housed pigs per treatment. Treatments included a control diet based on corn and SBM and 4 diets in which HP-DDG(Buhler) replaced 33, 66, 66, or 100% of the SBM in the control diet. All HP-DDG(Buhler) diets contained supplemental Lys and Thr to provide similar concentrations of SID Lys and Thr in all diets; one of the diets in which HP-DDG(Buhler) replaced 66% of the SBM and the diet in which HP-DDG(Buhler) replaced 100% of the SBM also contained crystalline Trp. Dietary treatments had no effect on ADG (1.15, 1.13, 1.16, 1.12, and 1.14 kg), ADFI (3.33, 3.35, 3.39, 3.30, and 3.33 kg), or G:F (0.35, 0.34, 0.34, 0.34, and 0.34 kg/kg). Carcass traits of pigs fed the diet in which HP-DDG(Buhler) replaced 100% of the SBM were not different from those of pigs fed the control diet. In conclusion, HP-DDG(Buhler) contains more DE and ME than corn, but has decreased SID values for AA compared with SBM. Soybean meal can be replaced by HP-DDG(Buhler) in diets fed to finishing pigs without any effect on growth performance or carcass characteristics, provided that diets are adequate in indispensable AA.

Low-protein diets affect ileal amino acid digestibility and gene expression of digestive enzymes in growing and finishing pigs

“…Groups A and B were supplemented with l-lysine, l-methionine, l-threonine, and l-tryptophan (see Table 1 Group A = 10 % CP (very low CP level); Group B = 13 % CP (low CP level); Group C = 16 % CP (normal CP level). Groups A and B were supplemented with l-lysine, l-methionine, l-threonine, and l-tryptophan (see Table 1 Kim et al 2009). However, maximal growth performance and feed efficiency of pigs depend on adequate provision of AA that can be synthesized by animals (Hou et al 2013(Hou et al , 2015Wu et al 2013).…”

Energy content and amino acid digestibility of extruded and dehulled-extruded corn by pigs and its effect on the performance of weaned pigs

“…Liener (1972) and Kim et al (2009) also reported that overheating made lysine unavailable due to its interaction with the reducing groups of sugars, called Maillard reactions, and thus it was no longer susceptible to tryptic cleavages making it unavailable to the pig. In the current study, the AID and SID of isoleucine, leucine, lysine, threonine, and valine in diets and corn were reduced by dehulled-extrusion processing, but not in extruded corn or extruded corn diet.…”

Impacts of Macronutrients on Gene Expression: Recent Evidence to Understand Productive and Reproductive Performance of Livestock

“…Amino acids (AA) have enormous physiological importance and considered as structural units for tissue proteins and essential substrates for many low molecular weight substances (Kim et al, 2009;Wu et al, 2014). Increasing interest in AA nutrition research reflects their importance to enhance animal production in a global context .…”