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Increased intake responses from beef steers zero-grazed on Lolium perenne selected for high levels of water soluble carbohydrate

Published online by Cambridge University Press:  20 November 2017

M.R.F. Lee
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, SY23 3EB, Wales, UK
R.T. Evans
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, SY23 3EB, Wales, UK
J.M. Moorby
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, SY23 3EB, Wales, UK
M.O. Humphreys
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, SY23 3EB, Wales, UK
M. K. Theodorou
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, SY23 3EB, Wales, UK
J.C. MacRae
Affiliation:
Rowett Research institute, Greenburn Road, Bucksburn, Aberdeen, AB21 9SB, Scotland, UK
N.D. Scollan
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, SY23 3EB, Wales, UK
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Extract

Fresh forages may result in the loss of up to 40% of dietary nitrogen as rumen ammonia, as the microbial population is unable to utilise all the non-protein nitrogen released from rapidly degradable plant proteins. This may be due to the characteristically low levels of readily available energy released in the rumen, primarily as a result of the low levels of water soluble carbohydrate (WSC) in traditional forages. In a previous experiment Lee et al, (1999) found an increase in liveweight gain of pre-weaned lambs grazing Lolium perenne selected for high WSC concentrations. This study examined whether the enhanced performance on high WSC grass may be related to increased supply of nitrogen to the small intestine.

Type
Poster Presentations
Copyright
Copyright © The British Society of Animal Science 2001

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References

Lee, M.R.F., Jones, E. L., Humphreys, M. O., Moorby, J. M., Dhanoa, M. S., Theodorou, M. K., MacRae, J. C., Scollan, N. D., 1999, Increased live weight gain from preweaned lambs grazing Lolium perenne selected for high water soluble carbohydrate concentrations, South African Journal of Animal Science, Vol. 29, pp. 321322.Google Scholar
Lawes Agricultural Trust, 1997, Genstat 5, Rothamstead Experimental Station, Harpendon, Hertfordshire, UK.Google Scholar

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