title: Amino acid digestibility in canola, cottonseed, and sunflower products fed to finishing pigs.
abstract: Our objective was to determine the standardized ileal digestibility (SID) of CP and AA in soybean meal (SBM) and canola, cotton, and sunflower products fed to finishing pigs. Each of 8 barrows (average initial BW = 106.6 ± 5.5 kg) were surgically fitted with a T-cannula in the distal ileum. Pigs were allotted to an 8 × 8 Latin square design with 8 diets and 8 periods. The 7 protein ingredients were canola seeds (CS), canola meal (CM), cottonseed meal (CSM), sunflower seeds (SFS), sunflower meal (SFM), dehulled sunflower meal (SFM-DH), and SBM, with each ingredient included as the sole source of AA in the diet. A N-free diet was used to estimate basal endogenous losses of AA. Among tested ingredients, SBM had the greatest (P < 0.05) SID of Lys, and CS had the least (P < 0.05) SID of Phe, Thr, and Tyr. The SID of all indispensable AA except Trp was less (P < 0.05) in CS than SBM, and CM had a greater (P < 0.05) SID of all indispensable AA except Arg, His, Lys, and Trp than CS. However, the SID of all indispensable AA except Arg and Trp were less (P < 0.05) in CM than in SBM. The SID of all indispensable AA except Arg and Trp also were less (P < 0.05) in CSM than in SBM, and the SID of Met was less (P < 0.05) in CSM than in all other ingredients. Among sunflower products, the SID of His, Leu, Phe, and Thr were less (P < 0.05) in SFM-DH than in SFS and SFM, and the SID of Ile, Met, and Val were less (P < 0.05) in SFM-DH than in SFS; however, for CP, Arg, Lys, and Trp, no differences among SFS, SFM, and SFM-DH were observed. The SID of all indispensable AA except Trp were less (P < 0.05) in SFM-DH than SBM, and the SID of His, Ile, Lys, Thr, and Val in SFM were also less (P < 0.05) than in SBM. Except for Lys, no differences between SBM and SFS were observed. In conclusion, the SID of most AA in CS, CM, CSM, SFM, and SFM-DH are less than in SBM.
authors.affiliation: Department of Animal Sciences, University of Illinois at Urbana-Champagne, Urbana 61801, USA.
authors.forename: J C
authors.initials: JC
authors.lastname: González-Vega
authors.forename: H H
authors.initials: HH
authors.lastname: Stein
mesh_terms: D000596:Amino Acids / Q000737:chemistry / Q000378:metabolism*; D000821:Animal Feed / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001937:Brassica / Q000737:chemistry* / Q000378:metabolism; D003369:Cottonseed Oil / Q000737:chemistry* / Q000378:metabolism; D018592:Cross-Over Studies; D004032:Diet / Q000662:veterinary; D006368:Helianthus / Q000737:chemistry* / Q000378:metabolism; D008297:Male; D013552:Swine / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D003369:Cottonseed Oil