title: The effect of feed intake on ileal rate of passage and apparent amino acid digestibility determined with or without correction factors in pigs.
abstract: The apparent ileal digestibilities of amino acids and rate of passage were evaluated in pigs (BW = 78.3 +/- 7.4 kg) fed a semipurified diet. The pigs were fed 1.82, 2.73, or 3.65 kg DMI/d. The highest level of feed intake was considered to be ad libitum feeding. The pigs were fed according to a 3 x 3 Latin square design and were allowed to adapt to each experimental diet for 5 d. This was followed by 1 d of continuous collection of ileal digesta and a 2nd d of continuous collection separated into six 2-h postprandial time blocks. Ytterbium chloride hexahydrate was used to determine rate of passage. The ileal digestibilities of amino acids and rate of passage were unaffected (P > 0.05) by level of feed intake. The use of correction factors to more accurately express amino acid concentrations in the diet and digesta affected (P < 0.05) the apparent ileal digestibility coefficients of some amino acids.
authors.affiliation: Department of Animal Sciences, University of Illinois, Urbana 61801, USA. albin@uiuc.edu
authors.forename: D M
authors.initials: DM
authors.lastname: Albin
authors.forename: J E
authors.initials: JE
authors.lastname: Wubben
authors.forename: M R
authors.initials: MR
authors.lastname: Smiricky
authors.forename: V M
authors.initials: VM
authors.lastname: Gabert
mesh_terms: D000596:Amino Acids / Q000378:metabolism*; D000818:Animals; D002712:Chlorides / Q000378:metabolism; D004032:Diet / Q000662:veterinary*; D004063:Digestion; D002149:Energy Intake; D005260:Female; D007082:Ileum / Q000378:metabolism*; D008297:Male; D019518:Postprandial Period; D013552:Swine / Q000378:metabolism*; D015018:Ytterbium / Q000378:metabolism
chemical_list: D000596:Amino Acids; D002712:Chlorides; C044841:ytterbium trichloride; D015018:Ytterbium