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The prediction of digestible and metabolisable energy concentrations in grass-based diets of producing cattle using data tested with sheep trials at maintenance feeding level

Published online by Cambridge University Press:  20 November 2017

T. Yan ,
R. E. Agnew  and
F. J. Gordon
T. Yan
Affiliation:
The Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down, Northern Ireland BT26 6DR, UK
R. E. Agnew
Affiliation:
The Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down, Northern Ireland BT26 6DR, UK
F. J. Gordon
Affiliation:
The Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down, Northern Ireland BT26 6DR, UK
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Extract

In the UK metabolisable energy (ME) system (AFRC, 1993) it is recommended that dietary ME concentration is reduced by proportionately 0.018 per unit increase in feeding level (FL) above maintenance. This factor was reported by Van Es (1975) two decades ago. At this Institute a total of 33 silages have been offered to sheep as a sole diet at maintenance for measurements of energy intake and outputs in faeces and urine. These silages were also fed to cattle, together with concentrates, at production level for determination of energy metabolism data in calorimetric chambers. The objective of the present study was to use these data to evaluate the combined effects of animal species and level of feeding on ME and digestible energy (DE) concentrations in diets.

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Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2001 , 2001 , pp. 92
Copyright
Copyright © The British Society of Animal Science 2001

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References

Agricultural and Food Research Council. 1993. Energy and protein requirements of ruminants. CAB International, Wallingford, Oxon, UK.Google Scholar
Van Es, A. J. H. 1975. Feed evaluation for dairy cows. Livestock Production Science 2:95–107.CrossRefGoogle Scholar