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Experiments with the long-term rumen simulation technique (Rusitec); response to supplementation of basal rations

Published online by Cambridge University Press:  09 March 2007

J. W. Czerkawski  and
Grace Breckenridge
J. W. Czerkawski
Affiliation:
The Hannah Research Institute, Ayr, Scotland KA6 5HL
Grace Breckenridge
Affiliation:
The Hannah Research Institute, Ayr, Scotland KA6 5HL
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Abstract

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1. It is shown that a basal roughage diet can be successfully supplemented with glucose, as long as nitrogen is not limiting. Lack of N depresses the digestibility of the basal ration, results in incomplete fermentation and the increased recoveries of N are consistent with fixation of atmospheric N2.

2. Using a complex, but soluble supplement (whey powder) it is shown that reproducible incremental measurements can be made and that the supplement used gives increases in production of characteristic end-products only (carbon dioxide, methane, acetic and butyric acids).

3. The location of the solid dietary components within the reaction vessel is not important and it is possible to measure changes in a particular component in the presence of others. It is shown that there is sequestration of bacteria and protozoa on the solid digesta.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 42 , Issue 2 , September 1979 , pp. 217 - 228
Copyright
Copyright © The Nutrition Society 1979

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