Inter-relationship of microbial activity, digestion and gut health in the rabbit: effect of substituting fibre by starch in diets having a high proportion of rapidly fermentable polysaccharides

The British Journal of Nutrition
T GidenneMuriel Segura

Abstract

Caecal microbial activity, digestion and gut health were analysed in the young rabbit, in response to fibre substitution by starch, in diets with high proportions of rapidly fermentable polysaccharides (pectins+hemicelluloses:acid-detergent fibre (ADF) ratio of 1.7). A range of five diets corresponding to a 60 % linear reduction of the ADF level (230 to 92 g ADF/kg) without changes in the fibre quality, and to a corresponding linear increase in dietary starch, was given ad libitum to young rabbits from 18 d until 70 d of age. A one half reduction of the ADF level resulted in a sharp increase in energy digestibility (+25 units), associated with a lower feed intake (-35 %) and to an increase of the mean retention time (+6 h) in the whole digestive tract. Despite large variations in the fibre intake (20 to 59 g ADF/d), the fibre digestive efficiency remained similar among the five diets. Starch ileal concentrations were low after 4 weeks of age (<5 %), and variations with age were significant when the dietary starch level was over 19 %. A 65 % lower biomass production was measured when the ADF level progressed from 230 to 165 g/kg, and no precise relationship was found with fermentative activity. Reducing the fibre intake led to a...Continue Reading

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Citations

Oct 4, 2012·Animal : an International Journal of Animal Bioscience·J C De Blas
Jun 19, 2013·Animal : an International Journal of Animal Bioscience·S CombesT Gidenne
Feb 26, 2015·Journal of Pharmaceutical Sciences·Grace B HattonHamid A Merchant
Sep 13, 2015·Canadian Journal of Microbiology·Yanli ZhuFuchang Li
Apr 1, 2014·Journal of Proteomics·Yanli ZhuFuchang Li
Nov 14, 2014·Animal : an International Journal of Animal Bioscience·T Gidenne
Dec 4, 2008·FEMS Microbiology Ecology·Valérie MonteilsThierry Gidenne
Aug 27, 2016·Journal of Animal Physiology and Animal Nutrition·Y ZhuF Li
Mar 8, 2017·The Journal of Small Animal Practice·A L Meredith, J L Prebble
Mar 1, 2007·Animal : an International Journal of Animal Bioscience·A Lavrenčič
Dec 8, 2017·Animals : an Open Access Journal From MDPI·Isabella Corsato AlvarengaMicah Kohles
Aug 10, 2021·The Veterinary Clinics of North America. Exotic Animal Practice·Kim Le, Joanne Sheen

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