Variability of apparent ileal amino acid digestibilityin high-protein wheat samples for growing-finishingpigs

TL;DRAbstract

An experiment was conducted to investigate factors responsible for the variability of apparent ileal digestibility values of amino acids (AA) in high-protein wheat samples. Six barrows, average initial body weight 30.5 kg, fitted with a simple T-cannula at the distal ileum, were fed six diets according to a 6 x 6 Latin square design. The six diets included 970 g kg" 1 of different samples of wheat. Chromic oxide was used as the digestibility marker. The barrows were fed twice daily, at 08:00 and 20:00 h. The dietary allowance was 1,600 g d" 1 . Each experimental period consisted of 8 d. Ileal digesta were collected for a total of 24 h, at 2-h intervals, from 08:00 on d 6 to 08:00 h on d 8. There were differences (P<0.05) in the apparent ileal digestibility values of all amino acids (AA) among the wheat samples. Of the indispensable (+semi-) amino acids (AA), within each sample, the digestibility values of lysine and threonine, the first-and second-limiting AA, were lowest and ranged fr

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