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Microbial activity in grass-fed in-vitro continuous cultures in response to infusion of graded levels of soluble sugars

Published online by Cambridge University Press:  20 November 2017

M.R.F. Lee ,
D.K. Leemans ,
D.R. Davies ,
R.J. Merry ,
J. M. Moorby ,
M.O. Humphreys ,
M.K. Theodorou ,
J.C. MacRae  and
N. D. Scollan
M.R.F. Lee
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, SY23 3EB, Wales, UK
D.K. Leemans
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, SY23 3EB, Wales, UK
D.R. Davies
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, SY23 3EB, Wales, UK
R.J. Merry
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

Novel lines of high sugar ryegrass have been shown to increase the efficiency of N use and milk production in zero-grazed cattle (Miller et al., 1999). An experiment was carried out to determine whether this was in part due to an increase in the efficiency of microbial protein synthesis in response to the amount and availability of water soluble carbohydrate (WSC) increasing the balance between energy and nitrogen supply to the rumen microbial population.

Type
Threatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2001 , 2001 , pp. 29
Copyright
Copyright © The British Society of Animal Science 2001

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References

Carro, M.D., Miller, E.L., 1999, Effect of supplementing a fibre basal diet with different nitrogen forms on ruminal fermentation and microbial growth in an in-vitro semi-continuous culture system (RUSITEC), British Journal of Nutrition, Vol. 82, pp. 149.Google Scholar
Czerkawski, J.W., Breckenridge, G., 1977, Design and development of a long-term rumen simulation technique (RUSITEC), British Journal of Nutrition, Vol. 38, pp. 371.Google Scholar
Lawes Agricultural Trust, 1997, Gentstat 5, Rothamstead Experimental Station, Harpendon, Hertfordshire, UK.Google Scholar
Miller, L.A., Neville, M.A., Baker, D.H., Evans, R.T., Theodorou, M. K., MacRae, J. C., Humphreys, M. O., Moorby, J. M., 1999, Milk production from dairy cows offered perennial ryegrass selected for high water soluble carbohydrate concentrations compared to a control grass, Proceedings of the British Society of Animal Science 1999, pp. 208.Google Scholar