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Comparison of parameters from the Theodorou gas production technique using nitrogen-free and nitrogen-rich media as predictors of dry-matter intake and digestibility

  • D. L. Romney (a1), F. C. Cadario (a2), E. Owen (a3) and A .H. Murray (a1)

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Parameters from in vitro gas production techniques could have potential as predictors of dry-matter intake (DMI) and digestibility. Fermentation is usually carried out under conditions where nitrogen (N) is not limiting. Therefore where N supply is a constraint to intake and digestibility, prediction equations may be inaccurate. This study compared the use of N-free and N-rich media in an in vitro fermentation method (Theodorou et al., 1994) and studied the relationships between in vitro and in vivo parameters obtained using both media.

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Menke, K. H., Raab, L., Salewski, A., Steingass, H., Fritz, D. and Schneider, W. 1979. The estimation of the digestibility and metabolizable energy content of ruminant feedingstuffs from the gas production when they are incubated with rumen liquor in vitro . Journal of Agricultural Science, Cambridge 93:217222.
Theodorou, M. K., Williams, B. A., Dhanoa, M. S., McAllan, A. B. and France, J. 1994. A simple gas production method using a pressure transducer to determine the fermentation kinetics of ruminant feeds. Animal Feed Science and Technology 48:185197.

Comparison of parameters from the Theodorou gas production technique using nitrogen-free and nitrogen-rich media as predictors of dry-matter intake and digestibility

  • D. L. Romney (a1), F. C. Cadario (a2), E. Owen (a3) and A .H. Murray (a1)

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