In vitro Assessment of Ruminal Fermentation Characteristics of Tropical Browse Mixtures Supplemented with Yeast
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Date
2012-03
Authors
Wambui, C. C.
Ando, S.
Abdulrazak, S. A.
Osuga, Isaac M.
Ichinohe, T.
Journal Title
Journal ISSN
Volume Title
Publisher
Japanese Society of Grassland Science
Abstract
An in vitro ruminal gas production study was conducted to assess the effect of yeast supplementation on rumen fermentation of tanniniferous tropical browse mixtures prepared by mixing Berchemia discolor with Acacia brevispica, Acacia elatior, Acacia mellifera, Balanites aegyptiaca, Grewia bicolor or Zizyphus mucronata in a 1:1 dry weight ratio. The six browse mixtures were incubated with buffered rumen fluid alone or supplemented with dried Japanese Sake yeast (JSY) or polyethylene glycol (PEG). Ruminal gas production characteristics were evaluated using the Gompertz equation. The JSY addition increased gas production volume (P < 0.05) and numerically increased the maximum gas production rate constant. Time to reach the maximum gas production rate was shortened by PEG addition as compared to the JSY and control treatments. It is possible that JSY promoted the rumen microbial activity in addition to forming complexes with tannins thereby upgrading the in vitro ruminal digestion of tropical browse mixtures.
Description
DOI: 10.1111/j.1744-697X.2011.00236.x
Keywords
Browse mixtures, in vitro digestion, yeast supplementation
Citation
DOI: 10.1111/j.1744-697X.2011.00236.x