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Relationships between organic-matter digestibility, dry-matter intake and solute mean retention times in sheep given a ground and pelleted diet

Published online by Cambridge University Press:  27 March 2009

G. J. Faichney  and
S. G. Gherardi
G. J. Faichney
Affiliation:
CSIRO, Division of Animal Production, P.O. Box 239, Blacktowm 2148, New South Wales, Australia
S. G. Gherardi
Affiliation:
CSIRO, Division of Animal Production, P.O. Box 239, Blacktowm 2148, New South Wales, Australia
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Summary

The relationships between organic-matter digestibility (OMD), dry-matter intake (DMI) and the mean retention time (MRT) of unabsorbed solutes in the gastrointestinal tract were examined using six fistulated, cross-bred, castrate male sheep. Measurements were made on each sheep at two different DMIs within the range 28–81 g D.m./(day. kg0·75). There were negative, curvilinear relationships between MRTs (both rumen and total) and DMI and positive, curvilinear relationships between OMD and MRTs. As a consequence, there was a negative, rectilinear relationship between OMD and DMI. OMD declined by 0·022 when DMI increased from calculated maintenance to twice maintenance. The proportion of the total MRT accounted for by rumen MRT did not change significantly; the mean value was 0·364 ( ± S.e. 0·010).

Type
Research Article
Information
The Journal of Agricultural Science , Volume 106 , Issue 2 , April 1986 , pp. 219 - 222
Copyright
Copyright © Cambridge University Press 1986

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References

REFERENCES

Agricultural Research Council (1980). The Nutrient Requirements of Ruminant Livestock. Technical Review by an Agricultural Research Council Working Party. Farnham Royal, England: Commonwealth Agricultural Bureaux.Google Scholar
Blaxter, K. L., Graham, N. McC. & Wainman, F. W. (1956). Some observations on the digestibility of food by sheep, and on related problems. British Journal of Nutrition 10, 69–91.Google Scholar
Downes, A. M. & McDonald, I. W. (1964). The chromium-51 complex of ethylene-diamine tetra acetic acid as a soluble rumen marker. British Journal of Nutrition 18, 153–162.Google Scholar
Faichney, G. J. (1975). The use of markers to partition digestion within the gastrointestinal tract of ruminants. In Digestion and Metabolism in the Ruminant (ed. McDonald, I. W. and Warner, A. C. I.), pp. 277–291. Armidale, N.S.W.: University of New England.Google Scholar
Faichney, G. J. (1983). The effect of physical form of lucerne hay on the passage of markers through the rumen of sheep. Proceedings of the Nutrition Society of Australia 8, 186.Google Scholar
Faichney, G. J. (1985). The kinetics of particulate matter in the rumen. In Control of Digestion and Metabolism in Ruminants (ed. Milligan, L. P., Grovum, W. L. and Dobson, A.) (in the Press). Reston, Va., U.S.A.: Reston Publishing Co.Google Scholar
Faichney, G. J. & Boston, R. C. (1983). Interpretation of the faecal excretion patterns of solute and particle markers introduced into the rumen of sheep. Journal of Agricultural Science, Cambridge 101, 575–581.Google Scholar
Faichney, G. J. & Gherardi, S. G. (1985). Correction of [51Cr]EDTA mean retention times to obtain those for unabsorbed solutes in continuously fed sheep. Proceedings of the Nutrition Society of Australia 10 (in the Press).Google Scholar
Faichney, G. J. & White, G. A. (1983). Methods for the Analysis of Feeds Eaten by Ruminants. Melbourne, Vic.: CSIRO.Google Scholar
Graham, N. McC. (1980). Variation in energy and nitrogen utilization by sheep between weaning and maturity. Australian Journal of Agricultural Research 31, 335–345.Google Scholar
Schneider, B. H. & Flatt, W. P. (1975). The Evaluation of Feeds through Digestibility Experiments. Athens, Georgia: University of Georgia Press.Google Scholar