Hostname: page-component-76fb5796d-r6qrq Total loading time: 0 Render date: 2024-04-26T03:44:12.182Z Has data issue: false hasContentIssue false

Effect of non-uniform distribution of particle-associated markers on the measurement of duodenal digesta flow by the double-marker technique

Published online by Cambridge University Press:  27 March 2009

G. J. Faichney
Affiliation:
CSIRO, Division of Animal Production, PO Box 239, Blacktown, NSW, Australia

Summary

Simulating changes in the distribution of the particle marker between particle-phase and fluid-phase dry matter by ±40% resulted in calculated flows of dry matter to the duodenum that differed from the ideal of uniform distribution by 1 to 2%; true digesta flow values were virtually unaffected. These errors are small and can probably be ignored.

Type
Animals
Copyright
Copyright © Cambridge University Press 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Faichney, G. J. (1975). The use of markers to partition digestion within the gastro-intestinal tract of ruminants. In Digestion and Metabolism in the Ruminant (Eds McDonald, I. W.Warner, A. C. I.), pp. 227291. Armidale, NSW: University of New England Publishing Unit.Google Scholar
Faichney, G. J. (1980). Measurement in sheep of the quantity and composition of rumen digesta and of the fractional outflow rates of digesta constituents. Australian Journal of Agricultural Research 31, 11291137.CrossRefGoogle Scholar
Faichney, G. J. (1986). Kinetics of particulate matter in the rumen. In Control of Digestion and Metabolism in Ruminants (Eds Milligan, L. P., Grovum, W. L.Dobson, A.), pp. 173195. Englewood Cliffs, NJ: Prentice- Hall.Google Scholar
Faichney, G. J., Poncet, C.Boston, R. C. (1989 a). Passage of internal and external markers of particulate matter through the rumen of sheep. Reproduction Nutrition Development 29, 325337.CrossRefGoogle Scholar
Faichney, G. J., Tagari, H., Teleki, E.Boston, R. C. (1989 b). Contribution of bacterial-N to rumen protozoal- N in sheep supplemented with untreated or HCHO treated sunflower seed meal. In The Roles of Protozoa and Fungi in Ruminant Digestion (Eds Nolan, J. V., Leng, R. A.Demeyer, D. I.), pp. 301304. Armidale, NSW: Penambul Books.Google Scholar
Ortigues, I., Oldham, J. D., Smith, T., De Courtenay, M. B.Siviter, J. W. (1990). A comparison between ytterbium acetate, ruthenium phenanthroline and indigestible acid detergent fibre in a double-marker system for intestinal flow measurements in steers. Journal of Agricultural Science, Cambridge 114, 6977.CrossRefGoogle Scholar
Warner, A. C. I. (1969). Binding of the 51Cr complex of ethylenediamine tetraacetic acid to particulate matter in the rumen. Veterinary Record 84, 441442.CrossRefGoogle ScholarPubMed