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The effect of roughage quality on intake, digestion and rumen function in sheep

Published online by Cambridge University Press:  22 November 2017

F.D.DeB. Hovell ,
S.M. Masvaure ,
P.C. Gregory  and
D.J. Kyle
F.D.DeB. Hovell
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen and School of Agriculture
S.M. Masvaure
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen and School of Agriculture Rowett Research Institute, Bucksburn, Aberdeen and School of Agriculture, University of Aberdeen
P.C. Gregory
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen and School of Agriculture
D.J. Kyle
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen and School of Agriculture
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Extract

In a previous experiment (Hovell et al. (1987)) it was found that with two roughages, one of good (hay) and the other of poor (straw) degradability, both ground and pelleted, that the voluntary intake of the hay was (60% greater than that of the straw. This was despite the fact that rumen DM pool sizes were very similar. The outflow of undegraded material from the rumen was much greater with the hay although particle size should not have been a constraint to outflow with either roughage (Poppi et al. (1980)), and indeed their particle size distributions were very similar. It was suggested that there might have been an effect of roughage quality on rumen outflow rate, possibly mediated through an effect on reticulo-rumen contractions.

The objective of the experiment reported here was to examine the effect of roughages with different degradabilities on voluntary intake, rumen volume, rumen outflow rate, and on reticulo-ruminal contractions.

Type
General
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1988 , March 1988 , pp. 77
Copyright
Copyright © The British Society of Animal Production 1988

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References

Agricultural Research Council (1984). The Nutrient Requirements of Ruminant Livestock, Supplement No. 1. Commonwealth Agricultural Bureaux, Farnham Royal, Slough.Google Scholar
Hovell, F.D.DeB., Campos-Arceu, R. and Kyle, D.J. (1987). Anim. Prod. 44: 476, Abst. 57.Google Scholar
Poppi, D.P., Norton, B.W., Minson, D.J. and Hendrickson, R.E. (1980). J. Agric. Sci. Camb. 94: 275–280.CrossRefGoogle Scholar