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The use of the gas-test technique for predicting the feeding value of forage plants

Published online by Cambridge University Press:  27 February 2018

M. Chenost ,
F. Deverre ,
J. Aufrère  and
C. Demarquilly
M. Chenost
Affiliation:
INRA, Station de Recherches sur la Nutrition des Herbivores, 63122 St Genès-Champanelle, France
F. Deverre
Affiliation:
INRA, Station de Recherches sur la Nutrition des Herbivores, 63122 St Genès-Champanelle, France
J. Aufrère
Affiliation:
INRA, Station de Recherches sur la Nutrition des Herbivores, 63122 St Genès-Champanelle, France
C. Demarquilly
Affiliation:
INRA, Station de Recherches sur la Nutrition des Herbivores, 63122 St Genès-Champanelle, France
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Extract

The ‘gas test’ technique (Menke and Steingass, 1988) is becoming popular for predicting the feeding value of forages. However the relationships observed by Khazaal et al. (1995) between in vivo data and prediction measurements on grasses and legume hays were less good with the gas test technique than with the in situ technique. The present results are part of the work undertaken at the laboratory with the aim of improving the accuracy of the technique on various types of foods (Chenost et al., 1997).

Seventy-nine forages (24 green (G) grasses, 38 grass hays (H), five G lucernes and 12 lucerne H) of known in vivo organic matter apparent digestibility (OMD) out of which 45 (17 G grasses, 16 grass H, five G lucernes and seven lucerne H) of known voluntary dry-matter intake (DMI), both measured with sheep, were chosen based on the range of variation of their OMD (from 0-490 to 0-808) and of their crude protein content (CP from 48 to 253 g/kg DM).

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Information
BSAP Occasional Publication , Volume 22: In vitro techniques for measuring nutrient supply to ruminants , 1998 , pp. 255 - 258
Copyright
Copyright © British Society of Animal Science 1998

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References

Chenost, M., Andrieu, J., Aufrère, J., Demarquilly, C. 1997. Some methodological aspects for predicting whole plant maize digestibility from the ‘gas-test’ technique. Options Méditerranéennes In press.Google Scholar
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