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A comparison between in situ and in vitro measurement of rumen degradability of Brazilian feeds

Published online by Cambridge University Press:  20 November 2017

I.C.S. Bueno
Affiliation:
Animal Nutrition Lab, CENA/USP, Caixa Postal 96, CEP 13400-970, Piracicaba, São Paulo, Brazil
S.P. Gobbo
Affiliation:
Animal Nutrition Lab, CENA/USP, Caixa Postal 96, CEP 13400-970, Piracicaba, São Paulo, Brazil
A.L. Abdalla
Affiliation:
Animal Nutrition Lab, CENA/USP, Caixa Postal 96, CEP 13400-970, Piracicaba, São Paulo, Brazil
S.L.S. Cabral Filho
Affiliation:
Animal Nutrition Lab, CENA/USP, Caixa Postal 96, CEP 13400-970, Piracicaba, São Paulo, Brazil
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Extract

The in situ measurement of rumen degradability explains properly the disappearance of rumen feeds by solubilization. However, this methodology does not assure wheather the material in the rumen indeed suffered microbial degradation, or if the loss of material occurred by other reasons. The in vitro gas production technique, on other hand, measures a product of the fermentation process. If the remains of the gas production is recovered at pre-determined intervals, we could also determine the rate and extent of the degradation occurred in the process. Thus, the aim of this work was to compare the rate and extent of the degradation obtained from these two methodologies.

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Theatre Presentations
Copyright
Copyright © The British Society of Animal Science 2000

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References

Ørskov, E.R. & McDonald, I., 1979. The estimation of protein degradability in the rumen from incubation measurements weighted according to the rate of passage. Journal of American Science. 92: 449-53.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: 185-97.CrossRefGoogle Scholar
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