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Net mesenteric and portal absorption and rumen metabolism of volatile fatty acids in forage-fed steers receiving intraruminal propionic acid

Published online by Cambridge University Press:  24 November 2017

C.J. Seal  and
D.S. Parker
C.J. Seal
Affiliation:
Department of Biological and Nutritional Sciences, Faculty of Agriculture and Biological Sciences, University of Newcastle upon Tyne, Newcastle upon Tyne NE1 7RU
D.S. Parker
Affiliation:
Department of Biological and Nutritional Sciences, Faculty of Agriculture and Biological Sciences, University of Newcastle upon Tyne, Newcastle upon Tyne NE1 7RU
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Extract

The ability of the gut tissues to absorb nutrients and the extent to which these are then metabolised within the gastrointestinal tract plays a central role in regulating the supply of metabolites to the liver and consequently influences the availability of nutrients for hepatic and peripheral tissue use. Energy consumption by the portal drained viscera is extensive and may account for 25% of total body oxygen consumption (Huntington and Reynolds, 1987). Substrates available for oxidative metabolism include volatile fatty acids (VFA) produced in the rumen and large intestine as addition to arterial supply of these nutrients. The aim of this experiment was to investigate the influence of increased propionate availability on metabolism of VFA in the rumen and the gastrointestinal tract.

Type
Ruminant Metabolism
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1993: Winter meeting , March 1993 , pp. 54
Copyright
Copyright © The British Society of Animal Production 1993

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References

Conway, E.J. (1947). Microdiffusion Analysis and Volumetric Error. pp l89–200. London, Crosby Lockwood & Son Ltd.Google Scholar
Huntington, G.B. & Reynolds, C.K. (1987). J. Nutr. 117, 1167–1173.Google Scholar
Seal, C.J., Parker, D.S. & Avery, P.J. (1992). Br. J. Nutr. 67, 355–370.Google Scholar