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The development of maintenance energy requirement and energetic efficiency for lactation from production data of lactating dairy cows

Published online by Cambridge University Press:  20 November 2017

R. E. Agnew ,
T. Yan ,
J. J. Murphy ,
C. P. Ferris  and
F. J. Gordon
R. E. Agnew
Affiliation:
The Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down, Northern Ireland BT26 6DR, UK
T. Yan
Affiliation:
The Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down, Northern Ireland BT26 6DR, UK
J. J. Murphy
Affiliation:
Teagasc, Moorepark Research Centre, Fermoy, Co. Cork, Ireland
C. P. Ferris
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

The energy feeding systems currently adopted for dairy cows in Western Europe and North America were developed from calorimetric data published 30 years ago. However, the calorimetric measurements were usually undertaken with a small number of trained animals, housed for a short period in respiration chambers. The objective of the present study was to use production data to develop the metabolisable energy (ME) requirement for maintenance (MEm) and the efficiency of ME use for lactation (kl) for dairy cows.

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2002 , 2002 , pp. 39
Copyright
Copyright © The British Society of Animal Science 2002

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References

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