Propionate precursors and other metabolic intermediates as possible alternative electron acceptors to methanogenesis in ruminal fermentation in vitro

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dc.contributor.author Newbold, C. James
dc.contributor.author Ouda, J. O.
dc.contributor.author Moss, A. R.
dc.contributor.author Lopez, S.
dc.contributor.author Wallace, R. John
dc.contributor.author Nelson, Nancy
dc.date.accessioned 2008-12-11T11:37:54Z
dc.date.available 2008-12-11T11:37:54Z
dc.date.issued 2008-12-11
dc.identifier.citation Newbold , C J , Ouda , J O , Moss , A R , Lopez , S , Wallace , R J & Nelson , N 2008 , ' Propionate precursors and other metabolic intermediates as possible alternative electron acceptors to methanogenesis in ruminal fermentation in vitro ' British Journal of Nutrition , pp. 27-35 . en
dc.identifier.other PURE: 100759
dc.identifier.other dspace: 2160/1523
dc.identifier.uri http://hdl.handle.net/2160/1523
dc.identifier.uri http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=919996 en
dc.description C. J. Newbold, S. Lópeza, N. Nelson, J. O. Ouda, R. J. Wallace and A. R. Moss (2005). Propionate precursors and other metabolic intermediates as possible alternative electron acceptors to methanogenesis in ruminal fermentation in vitro. British Journal of Nutrition, 94 (1), 27-35. en
dc.description.abstract Fifteen potential precursors of propionate were tested for their ability to decrease CH4 production by ruminal fluid in vitro. Sodium acrylate and sodium fumarate produced the most consistent effects in batch cultures, with 50 % of the added precursors being fermented to propionate and CH4 production decreasing by between 8 and 17 %, respectively. Additives were more effective when added as free acids, but this also decreased the pH and may have inhibited fibre digestion. Changing the dietary substrate from predominantly grass hay to predominantly concentrate had no influence on the effectiveness of acrylate and fumarate. In an in vitro fermentor (the rumen simulating technique, Rusitec) with a grass hay¿concentrate (50:50, w/w) diet as substrate, both compounds were again fermented to propionate (33 and 44 % conversion to propionate, respectively). However, fumarate appeared more effective as a H2 sink compound. It was calculated to capture 44 % of the H2 previously used for CH4 formation compared with a 22 % capture of H2 with acrylate. Fumarate also caused a stimulation in fibre digestion. Thus, sodium fumarate was the preferred propionate precursor for use as a feed ingredient to decrease CH4 emissions from ruminants. en
dc.format.extent 9 en
dc.language.iso eng
dc.relation.ispartof British Journal of Nutrition en
dc.title Propionate precursors and other metabolic intermediates as possible alternative electron acceptors to methanogenesis in ruminal fermentation in vitro en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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