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This Article Full Text (PDF) All Versions of this Article: jas.2009-2060v1 87/12/4013    most recent Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Google Scholar Articles by Kim, B. G. Articles by Stein, H. H. PubMed PubMed Citation Articles by Kim, B. G. Articles by Stein, H. H.

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

B. G. Kim^*, G. I. Petersen^*, R. B. Hinson, G. L. Allee and H. H. Stein^*

^* Department of Animal Sciences, University of Illinois, Urbana 61801 Department of Animal Sciences, University of Missouri, Columbia 65211

hstein{at}uiuc.edu

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 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 a 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. 84.3%; Phe, 77.9 vs. 87.3%; Thr, 72.5 vs. 83.5%; Trp, 85.1 vs. 91.0%; Val, 73.3 vs. 88.1%). 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 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 DM and 4,690 vs. 3,921 kcal/kg DM, respectively). Experiment 3 was a 9-wk growth assay using 40 pigs (initial BW: 58.2 ± 2.28 kg) that were 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 where 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 fed the control diet. In conclusion, HP-DDG_Buhler contains more DE and ME than corn, but has lower SID values for AA than 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.

Key Words: amino acid digestibility • energy • growth performance • carcass characteristics • high-protein distillers dried grains • pigs