Relationship between the levels of soluble nonstarch polysaccharides and the apparent metabolizable energy of wheats assayed in broiler chickens
1991
Annison, G.
The total arabinoxylan contents of 13 wheats grown in different regions of New South Wales, Australia, were determined. In addition, the wheats were sequentially extracted with cold 0.01 M NaCl, hot 0.01 M NaCl with a thermostable alpha-amylase, and cold 0.1 M NaOH. The nonstarch polysaccharide (NSP) content of each of the extracted fractions was determined. The nutritive quality of the wheats for broiler chickens was assessed by using a classical apparent metabolizable energy (AME) assay. The wheats ranged from 11.25 to 13.59 MJ/kg of dry matter. A highly significant negative correlation (r = -0.91, P < 0.0001) was found between AME values and the total NSP (which consisted mainly of arabinoxylan) removed from the wheats in the first two extractions. AME was not correlated with the alkaline-extracted NSP or total arabinoxylan levels. It was concluded that water-soluble NSP of wheat possesses antinutritive activity, while the water-insoluble NSP is probably biologically inert in the broiler chicken.
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