Ileal digestibility and urinary excretion of D-xylose and L-arabinose in ileostomized adult roosters.

J. B. Schutte,P. van Leeuwen,W. Lichtendonk

Published 1991 in Poultry Science

ABSTRACT

An experiment with ileostomized adult roosters was conducted to determine the ileal digestibility and urinary excretion of D-xylose and L-arabinose. As a reference, D-glucose was included in the experiment. The sugars were tested at graded dietary levels of 2.5, 5.0, 7.5, and 10.0%. Mean ileal digestibility of D-glucose and D-xylose was nearly 100%. Ileal digestibility of L-arabinose decreased linearly (P less than .05) with increasing dose level. The corresponding ileal digestibilities for L-arabinose at dietary levels of 2.5, 5.0, 7.5, and 10.0% were 95.5, 93.6, 80.3, and 74.6%. Both pentose sugars were partly excreted in the urine. The extent of this urinary excretion in percentage of intake increased linearly (P less than .05) as the dietary level increased. In roosters fed the 2.5% D-xylose diet, 7.2% of the D-xylose consumed appeared in the urine. This level increased to 20.2% when roosters were fed a diet containing 10.0% D-xylose. Corresponding values for L-arabinose at these dietary inclusion levels were 8.7 and 16.6%.

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