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The reduction of nutrient digestibility and energy concentration from maintenance feeding (sheep) to production feeding (lactating dairy cows) in grass silage-based diets

Published online by Cambridge University Press:  20 November 2017

T. Yan ,
C. P. Ferris ,
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
C. P. Ferris
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

AFRC (1993) recommends a reduction of proportionately 0.018 in dietary metabolisble energy (ME) concentration with each unit increase in feeding level above maintenance in dairy cows (feeding level is calculated as total ME intake divided by ME requirement for maintenance). A similar value (0.016) was reported recently by Yan et al. (2001) using a number of linear and multiple regression techniques with lactating dairy cows offered grass silage-based diets. The objectives of the present study were to validate these two values and also to evaluate the effects of feeding level on nutrient digestibility and ME concentration in the mixed diets.

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2002 , 2002 , pp. 113
Copyright
Copyright © The British Society of Animal Science 2002

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References

Agricultural and Food Research Council. 1993. Energy and protein requirements of ruminants. CAB International, Wallingford, Oxon, UK.Google Scholar
Yan, T. and Agnew, R. E. and Gordon, F. J. 2001. The prediction of digestible and metabolisable energy concentrations in grass-based diets of producing cattle using data determined through sheep at maintenance feeding level. In: The Proceedings of Annual Meeting of British Society of Animal Science, p. 92, York, England.Google Scholar