Effect of type of fiber, site of fermentation, and method of analysis on digestibility of soluble and insoluble fiber in rabbits

Abad Guamán, Rodrigo Medardo and Carabaño Luengo, Rosa Maria and Goméz Conde, María Soledad and Garcia Alonso, Javier (2015). Effect of type of fiber, site of fermentation, and method of analysis on digestibility of soluble and insoluble fiber in rabbits. "Journal of Animal Science", v. 93 (n. 6); pp. 2860-2871. ISSN 0021-8812. https://doi.org/10.2527/jas.2014-8767.

Description

Title: Effect of type of fiber, site of fermentation, and method of analysis on digestibility of soluble and insoluble fiber in rabbits
Author/s:
  • Abad Guamán, Rodrigo Medardo
  • Carabaño Luengo, Rosa Maria
  • Goméz Conde, María Soledad
  • Garcia Alonso, Javier
Item Type: Article
Título de Revista/Publicación: Journal of Animal Science
Date: June 2015
ISSN: 0021-8812
Volume: 93
Subjects:
Freetext Keywords: digestibility; insoluble dietary fiber; intestinal mucin; rabbit; soluble dietary fiber
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Producción Animal [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The effect of type of fiber, site of fermetation, method for quantifying insoluble and soluble dietary fiber, and their correction for intestinal mucin on fiber digestibility were examined in rabbits. Three diets differing in soluble fiber were formulated (8.5% soluble fiber, on DM basis, in the low soluble fiber [LSF] diet; 10.2% in the medium soluble fiber [MSF] diet; and 14.5% in the high soluble fiber [HSF] diet). They were obtained by replacing half of the dehydrated alfalfa in the MSF diet with a mixture of beet and apple pulp (HSF diet) or with a mix of oat hulls and soybean protein (LSF diet). Thirty rabbits with ileal T-cannulas were used to determine ileal and fecal digestibility. Cecal digestibility was determined by difference between fecal and ileal digestibility. Insoluble fiber was measured as NDF, insoluble dietary fiber (IDF), and in vitro insoluble fiber, whereas soluble fiber was calculated as the difference between total dietary fiber (TDF) and NDF (TDF_NDF), IDF (TDF-IDF), and in vitro insoluble fiber (TDF-in vitro insoluble fiber). The intestinal mucin content was used to correct the TDF and soluble fiber digestibility. Ileal and fecal concentration of mucin increased from the LSF to the HSF diet group (P < 0.01). Once corrected for intestinal mucin, ileal and fecal digestibility of TDF and soluble fiber increased whereas cecal digestibility decreased (P < 0.01). Ileal digestibility of TDF increased from the LSF to the HSF diet group (12.0 vs. 28.1%; P < 0.01), with no difference in the cecum (26.4%), resulting in a higher fecal digestibility from the LSF to the HSF diet group (P < 0.01). Ileal digestibility of insoluble fiber increased from the LSF to the HSF diet group (11.3 vs. 21.0%; P < 0.01), with no difference in the cecum (13.9%) and no effect of fiber method, resulting in a higher fecal digestibility for rabbits fed the HSF diet compared with the MSF and LSF diets groups (P < 0.01).Fecal digestibility of NDF was higher compared with IDF or in vitro insoluble fiber (P < 0.01). Ileal soluble fiber digestibility was higher for the HSF than for the LSF diet group (43.6 vs. 14.5%; P < 0.01) and fiber method did not affect it. Cecal soluble fiber digestibility decreased from the LSF to the HSF diet group (72.1 vs. 49.2%; P < 0.05). The lowest cecal and fecal soluble fiber digestibility was measured using TDF-NDF (P < 0.01). In conclusion, a correction for intestinal mucin is necessary for ileal TDF and soluble fiber digestibility whereas the selection of the fiber method has a minor relevance. The inclusion of sugar beet and apple pulp increased the amount of TDF fermented in the small intestine.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAGL2008-00627UnspecifiedUnspecifiedDesarrollo de nuevas estrategias nutricionales para promover la salud intestinal y la seguridad de la carne en conejos
Government of SpainAGL2001-2796UnspecifiedUnspecifiedUnspecified
Madrid Regional GovernmentS2009/AGR-1704NEWGANUnspecifiedNuevos sistemas de producción ganadera para maximizar la calidad de los productos cárnicos y el bienestar animal

More information

Item ID: 40307
DC Identifier: http://oa.upm.es/40307/
OAI Identifier: oai:oa.upm.es:40307
DOI: 10.2527/jas.2014-8767
Official URL: https://academic.oup.com/jas/article-abstract/93/6/2860/4703597?redirectedFrom=fulltext
Deposited by: Memoria Investigacion
Deposited on: 10 May 2016 16:44
Last Modified: 04 Jun 2019 16:31
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