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Estimation of efficiency of microbial growth in rumen fluid with the gas production technique

Published online by Cambridge University Press:  20 November 2017

J.W. Cone  and
A.H. van Gelder
J.W. Cone
Affiliation:
DLO-Institute for Animal Science and Health (ID-DLO), Department of Ruminant Nutrition, P.O.box 65, NL-8200 AB Lelystad, The Netherlands
A.H. van Gelder
Affiliation:
DLO-Institute for Animal Science and Health (ID-DLO), Department of Ruminant Nutrition, P.O.box 65, NL-8200 AB Lelystad, The Netherlands
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Extract

In the Dutch feed evaluation system for ruminants, it is assumed that each 1000 g of rumen fermented organic matter (FOM) produces 150 g of microbial protein. However, this is a simplification of the real in vivo processes. Demeyer and Van Nevel (1986) concluded that the efficiency of microbial growth depends on several factors, such as chemical and physical properties and intake. They concluded that feeding low quality roughage would show lowest efficiency and feeding highly degradable starch would show highest efficiency. We investigated the possibilities to estimate differences in efficiency of microbial growth in rumen fluid with the gas production technique.

Type
Programme
Information
Proceedings of the British Society of Animal Science , Volume 1999 , 1999 , pp. 39
Copyright
Copyright © The British Society of Animal Science 1999

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References

Cone, J.W., Van Gelder, A.H., Visscher, G.J.W. and Oudshoorn, L. 1996. Influence of rumen fluid and substrate concentration on fermentation kinetics measured with a fully automated time related gas production apparatus. Animal Feed Science and Technology 61: 113–128.Google Scholar
Cone, J.W., Van Gelder, A.H. and Driehuis, F. 1997. Description of gas production profiles with a three phasic model. Animal Feed Science and Technology 66: 31–45.Google Scholar
Demeyer, D. and Van Nevel, C. 1986. Influence on substrate and microbial interaction on efficiency of rumen microbial growth. Reproduction and Nutrition Developments 26: 161–179.Google Scholar
Zinn, R.A. and Owens, F.N. 1986. A rapid procedure for purine measurements and its use for estimating net ruminal protein synthesis. Canadian Journal of Animal Nutrition 66: 157–166.Google Scholar