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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

Published online by Cambridge University Press:  27 February 2018

D. L. Romney ,
F. C. Cadario ,
E. Owen  and
A .H. Murray
D. L. Romney
Affiliation:
Natural Resources Institute, Chatham Maritime, Chatham, Kent ME4 4T
F. C. Cadario
Affiliation:
Mision Britannica FEDEPLE, Proyecto de Nutricion de Ganado Lechero Barber, Santa Cruz, Bolivia
E. Owen
Affiliation:
Department of Agriculture, University of Reading, Earley Gate, Reading RG6 AT
A .H. Murray
Affiliation:
Natural Resources Institute, Chatham Maritime, Chatham, Kent ME4 4T
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Extract

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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Posters
Information
BSAP Occasional Publication , Volume 22: In vitro techniques for measuring nutrient supply to ruminants , 1998 , pp. 172 - 174
Copyright
Copyright © British Society of Animal Science 1998

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References

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 93:217–222.Google Scholar
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 48:185–197.Google Scholar