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The effect of feed intake on ileal rate of passage and apparent amino acid digestibility determined with or without correction factors in pigs.

Journal of animal science (2001-05-26)
D M Albin, J E Wubben, M R Smiricky, V M Gabert
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.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Ytterbium(III) chloride, AnhydroBeads, −10 mesh, 99.99% trace metals basis
Sigma-Aldrich
Ytterbium(III) chloride, anhydrous, powder, 99.9%

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