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Assessment of fermentation in growing pigs given unmolassed sugar-beet pulp: a stoichiometric approach

Published online by Cambridge University Press:  09 March 2007

J. Q. Zhu ,
V. R. Fowler  and
M. F. Fuller
J. Q. Zhu
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
V. R. Fowler
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
M. F. Fuller
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
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Abstract

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In four experiments growing pigs were given a cereal-based diet alone or supplemented with unmolassed sugar-beet pulp (SBP), used as a model substrate for fermentation. The rates of production of methane and gaseous hydrogen were measured and, together with the molar proportions of volatile fatty acids (VFA) in the digesta, used in stoichiometric calculations of fermentation. The resulting estimates were only one-sixth of the observed extent of digestion of SBP. Bacteriostatic levels of antibiotics reduced fermentation by more than half, as judged from the digestion of non-starch polysaccharides: allowing for the incomplete suppression of fermentation it was estimated that the production of methane and VFA could account completely for the digested SBP. The potential contribution of various routes of hydrogen disposal to the error of the stoichiometric calculations is discussed.

Keywords

FermentationUnmolassed sugar-beet pulpPig
Type
Stoichiometry fo Large Intestinal Fermentation
Information
British Journal of Nutrition , Volume 69 , Issue 2 , March 1993 , pp. 511 - 525
Copyright
Copyright © The Nutrition Society 1993

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