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Supplementation of barley straw with starch in sheep: Effect on microbial protein supply estimated from urinary purine derivative excretion

Published online by Cambridge University Press:  24 November 2017

M J. Gomes ,
X.B. Chen ,
FD.DeB. Hovell ,
D. Fickremariam  and
E.M. Nengomasha
M J. Gomes
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB.
X.B. Chen
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB.
FD.DeB. Hovell
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB.
D. Fickremariam
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB.
E.M. Nengomasha
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB.
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Extract

Utilization of cereal straws by ruminants is limited by low digestibility and intake. One solution is to supplement with rapidly fermentable carbohydrates (RFC), usually as starchy cereal grains. In restricted feeding experiments with roughages supplemented with RFC in the form of cereal grain concentrates, a slight increase in ruminal microbial protein (MP) synthetic efficiency has been observed with low, but a decline in efficiency at higher levels of supplementation (eg. Chen et al. 1992b). Huque (1991) noted that supplementation with low levels of starch improved straw intake and rumen digesta outflow rate. We have observed increased digesta flow rates to be associated with greater MP synthesis and yield per unit of digestible organic matter (DOM) (Chen et al. 1992a).

Type
Ruminant Metabolism
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1993: Winter meeting , March 1993 , pp. 178
Copyright
Copyright © The British Society of Animal Production 1993

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References

Agricultural Research Council 1984. The Nutrient Requirements of Ruminant Livestock (Suppl 1). Commonwealth Agricultural Bureaux, Slough.Google Scholar
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