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Comparison of rumen liquor and faeces, in UK and Brazil, as sources of microorganisms for in vitro gas production for assessing twelve forages

  • R. M. Mauricio (a1), E. Owen (a1), A.L Abdalla (a2), I.C.S. Bueno (a2), F. L. Mould (a1), S. Gilmour (a3) and M.K. Theodorou (a4)...

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In a previous study in Reading (altitude 66 m) (Mauricio et al., 1997) the lag phase was greater when cow faeces was used as a source of microorganisms in the in vitro gas production technique instead of rumen liquor when twelve temperate forages were fermented for 96 h. In the Reading study faeces and rumen liquor were obtained from a cow fed grass silage and concentrate (60:40). The present study was done in Piracicaba, Brazil-BR (altitude 780 m) which has a tropical climate. Using the same forages as in Mauricio et al. (1998), the study examined whether the same differences between faeces and rumen liquor would occur in a tropical environment. In addition, the opportunity was taken to develop an equation relating pressure and volume for the semi-automated pressure transducer technique and compare it with the equation developed in UK by Mauricio et al. (1998).

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France, J., Dhanoa, M.S., Theodorou, M.K., Lister, S.J., Davies, S.J. and Isac, D. 1993. A model to interpret gas accumulation profiles with in vitro degradation of ruminant feeds. Journal of Theoretical Biology 163:99111.
Mauricio, R.M., Owen, E., Dhanoa, M.S., Theodorou, M.K. Comparison of rumen liquor and faeces from cows as sources of microorganisms for the in vitro gas production technique, Proceedings of occasional meeting of British Society of Animal Science, 8-10 July 1997, University of Reading, UK.
Mauricio, R.M., Dhanoa, M.S., Owen, E., Channa, K.S., Mould, F.L., Theodorou, M.K. 1998. Semi-automation of in vitro gas production technique using a pressure transducer. Proceedings of the British Society of Animal Science, 23-25th March 1998.
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 rumen liquor and faeces, in UK and Brazil, as sources of microorganisms for in vitro gas production for assessing twelve forages

  • R. M. Mauricio (a1), E. Owen (a1), A.L Abdalla (a2), I.C.S. Bueno (a2), F. L. Mould (a1), S. Gilmour (a3) and M.K. Theodorou (a4)...

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