title: Apparent ileal digestibilities of amino acids in newly weaned pigs fed diets with protease-treated soybean meal.
abstract: Apparent ileal digestibilities of amino acids were determined in pigs fed cornstarch-based diets with untreated or protease-treated soybean meal as the protein source. Sixteen pigs were fitted with a modified post valve T-cecum cannula on d 14, 15, and 16 after birth and then returned to their sows until d 20 when they were weaned. Twelve of the pigs were selected for the study, which was conducted according to a two-period balanced change-over design. Treatments consisted of soybean meal that was 1) untreated (SBM), 2) processed by incubation (1:2 wt/vol distilled water adjusted to pH 4.5, for 16 h at 50 degrees C; CI-SBM), 3) sprayed with protease (supplied at 1 microL/g of soybean meal; PS-SBM), and 4) processed by incubation, as for CI-SBM, with protease in the water at the rate of 1 microL/g of soybean meal (PI-SBM). Each period consisted of 5 d of adaptation to diets followed by three 8-h collection periods (total of 24 h) that alternated with 8-h periods in which digesta were not collected. Apparent CP digestibilities were similar (P > .05) at 70.4, 72.4, 65.2, and 70.3% for the SBM, CI-SBM, PS-SBM, and PI-SBM diets, respectively. Corresponding amino acid digestibilities were also similar (P > .05), ranging from 62.5, 67.5, 57.9, and 65.0% for alanine to 83.5, 83.4, 78.7, and 84.7% for arginine. Apparent digestibilities were less (P < .05) for Period 1 (on d 7 after weaning) than for Period 2 (on d 16 after weaning). In conclusion, protease treatment of soybean meal had no effect on ileal digestibilities of CP and amino acids in newly weaned pigs.
authors.affiliation: Wageningen Institute of Animal Sciences, Department of Animal Nutrition, Wageningen Agricultural University, The Netherlands. wcaine@afns.ualberta.ca
authors.forename: W R
authors.initials: WR
authors.lastname: Caine
authors.forename: W C
authors.initials: WC
authors.lastname: Sauer
authors.forename: S
authors.initials: S
authors.lastname: Tamminga
authors.forename: M W
authors.initials: MW
authors.lastname: Verstegen
authors.forename: H
authors.initials: H
authors.lastname: Schulze
mesh_terms: D000287:Administration, Topical; D000375:Aging / Q000378:metabolism / Q000502:physiology; D000409:Alanine / Q000378:metabolism; D000596:Amino Acids / Q000378:metabolism*; D000818:Animals; D001120:Arginine / Q000378:metabolism; D004032:Diet / Q000662:veterinary*; D004044:Dietary Proteins / Q000378:metabolism; D004063:Digestion / Q000502:physiology*; D010450:Endopeptidases / Q000008:administration & dosage / Q000494:pharmacology*; D005260:Female; D006863:Hydrogen-Ion Concentration; D007082:Ileum / Q000378:metabolism* / Q000502:physiology; D008297:Male; D013025:Glycine max / Q000378:metabolism*; D013552:Swine / Q000254:growth & development / Q000502:physiology*; D014886:Weaning
chemical_list: D000596:Amino Acids; D004044:Dietary Proteins; D001120:Arginine; D010450:Endopeptidases; D000409:Alanine