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Title: Increased small intestinal fermentation is partly responsible for the anti-nutritive activity of non-starch polysaccharides in chickens
Contributor(s): Choct, Mingan  (author)orcid ; Hughes, Robert J (author); Wang, J (author); Bedford, M R (author); Morgan, A J (author); Annison, Geoffrey (author)
Publication Date: 1996
DOI: 10.1080/00071669608417891
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Abstract: 1. The mechanism of the anti-nutritive activities of soluble non-starch polysaccharides (NSPs) in broiler diets was investigated with emphasis on the interrelationship between viscosity and fermentation along the gut. Isolated soluble NSP were added to a control diet to effect high gut viscosity, and in vivo depolymerisation of the NSP was achieved using a commercial glycanase. 2. Addition of soluble NSPs significantly (P<0.01) increased gut viscosity, reduced the AME of the diet and depressed the growth and FCE of the birds. Enzyme supplementation of the NSP-enriched diet reversed the adverse effects, increasing (P<0.01) weight gain, FCE and AME. Comparisons of the viscosities (mPa) in birds fed on the NSP-enriched diet and the same diet supplemented with enzyme were respectively: 11-9 v. 2-3 in the duodenum; 78-3 v. 4-4 in the jejunum and 409-3 v. 10-8 in the ileum. 3. Caecal volatile fatty acid concentration was markedly (P<0.01) elevated by enzyme supplementation, whereas ileal fermentation was inhibited. 4. Microscopic examination revealed that, among birds fed on the NSP-enriched diet, there had been extensive small intestinal fermentation, which was eliminated by the enzyme supplementation. 5. Addition of a synthetic antibiotic (Amoxil) had no beneficial effects. 6. The current study demonstrated that increased fermentation occurs in the small intestine when a large amount of viscous NSPs is present in the diet and this is detrimental to the performance and well-being of poultry.
Publication Type: Journal Article
Source of Publication: British Poultry Science, 37(3), p. 609-621
Publisher: Taylor & Francis
Place of Publication: United Kingdom
ISSN: 1466-1799
Fields of Research (FoR) 2008: 070204 Animal Nutrition
Socio-Economic Objective (SEO) 2008: 830309 Poultry
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article

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