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Degradation of dietary oligofructose and inulin in the gastro-intestinal tract of the rabbit and the effects on caecal pH and volatile fatty acids

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Degradation of dietary oligofructose and inulin in the gastro-intestinal tract of the rabbit and the effects on caecal pH and volatile fatty acids

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dc.contributor.author Maertens, L.
dc.contributor.author Aerts, J.M.
dc.contributor.author De Boever, J.
dc.date.accessioned 2011-02-14T10:26:35Z
dc.date.available 2011-02-14T10:26:35Z
dc.date.issued 2004
dc.identifier.issn 1257-5011
dc.identifier.uri http://hdl.handle.net/10251/9766
dc.description.abstract [EN] Three experimental fattening diets were each fed ad libitum to 12 animals of 8-9 weeks of age (initial weight 2,257 ± 87 g). The diets contained 0% (Control), 2% oligofructose (OF) (Raftifeed(R) OPS) or 2% inulin (Raftifeed(R) IPS). After an adaptation period of 10 days, the individually caged rabbits received the same diets with Cr2O3 as a marker. For the 24 h before they were euthanised (between 08:30 and 09:00), rabbits wore a plastic collar to prevent caecotrophy. Dietary treatment affected gut acidity only in the caecum where a tendency to a reduced pH in the inulin-fed rabbits was observed. The total caecal concentration of volatile fatty acids was similar among dietary treatments but a significant (P<0.05) change occurred in inulin-fed rabbits with an increase of butyrate proportion (17.6, 20.2 and 22.6% for control, OF and inulin rabbits, respectively) at the expense of acetate (75.0, 72.3 and 70.1%, respectively). Fructans were not detected in the ileum, caecum or faeces of control rabbits, indicating that both types of oligosaccharides originating from the raw materials were degraded quickly. Significant amounts of the b(2-1)-fructans were still present in the ileum content of both OF and inulin fed rabbits (1.78 and 1.63% DM). Apparent ileal digestibility of fructans was 100% in control rabbits but significantly lower (P<0.01) in OF (35.3%) and inulin (49.2%) fed rabbits. The absence of fructans from caecal and faecal samples confirms their complete fermentation by the caecal microbial flora. However, with the methodology used (which increased variability) and the limited number of replicates (4 pooled samples/diet), no significant difference in the degradation due to the chain length of the inuline-type fructans was detected. es_ES
dc.description.sponsorship The authors are grateful to the Orafti company (Tienen, Belgium) for their financial and analytical support. They acknowledge the skilled technical support of A. Vermeulen and J. M. Vanacker.
dc.language Inglés es_ES
dc.publisher World Rabbit Science. ICTA. UPV es_ES
dc.relation.ispartof World Rabbit Science
dc.rights Reserva de todos los derechos es_ES
dc.subject Inulin es_ES
dc.subject Oligofructose es_ES
dc.subject Degradation es_ES
dc.subject Fermentation es_ES
dc.subject Rabbit es_ES
dc.title Degradation of dietary oligofructose and inulin in the gastro-intestinal tract of the rabbit and the effects on caecal pH and volatile fatty acids es_ES
dc.type Artículo es_ES
dc.date.updated 2011-02-14T10:16:16Z
dc.identifier.doi 10.4995/wrs.2004.569
dc.rights.accessRights Abierto es_ES
dc.description.bibliographicCitation Maertens, L.; Aerts, J.; De Boever, J. (2004). Degradation of dietary oligofructose and inulin in the gastro-intestinal tract of the rabbit and the effects on caecal pH and volatile fatty acids. World Rabbit Science. 12(4):235-246. https://doi.org/10.4995/wrs.2004.569 es_ES
dc.description.accrualMethod SWORD es_ES
dc.relation.publisherversion https://doi.org/10.4995/wrs.2004.569
dc.description.upvformatpinicio 235
dc.description.upvformatpfin 246
dc.description.volume 12
dc.description.issue 4
dc.identifier.eissn 1989-8886 es_ES
dc.contributor.funder Beneo-Orafti, S.A.


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