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A multicompartmental model to describe marker excretion patterns in ruminant faeces

Published online by Cambridge University Press:  24 July 2007

M. S. Dhanoa ,
R. C. Siddons ,
J. France  and
D. L. Gale
M. S. Dhanoa
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead, Berkshire SL6 5LR
R. C. Siddons
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead, Berkshire SL6 5LR
J. France
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead, Berkshire SL6 5LR
D. L. Gale
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead, Berkshire SL6 5LR
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Abstract

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1. A multicornpartmental model, which assumes first-order kinetics, is proposed to describe digesta flow along the gastrointestinal tract of ruminants.

2. Solution of the model yields a multiplicative equation, containing a single-exponential term and a double-exponential term, for describing faecal outflow rate.

3. The logarithmic transformation of the equation was fitted to eighty-two excretion curves obtained after the administration of marker into the rumen of cattle and sheep, and compared with other published models.

4. It was found to be superior to the other models in that it fitted all the data sets successfully.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 53 , Issue 3 , May 1985 , pp. 663 - 671
Copyright
Copyright © The Nutrition Society 1985

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