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The influence of cow genetic merit for milk production on response to level of concentrate supplementation in a grass based system

Published online by Cambridge University Press:  20 November 2017

P. Dillon ,
J. Kennedy ,
P. Faverdin ,
L. Delaby ,
F. Buckley  and
M. Rath
P. Dillon
Affiliation:
Teagasc, Moorepark Production Research Centre, Fermoy, Co. Cork, Ireland;
J. Kennedy
Affiliation:
Teagasc, Moorepark Production Research Centre, Fermoy, Co. Cork, Ireland;
P. Faverdin
Affiliation:
INRA, UMRPL, 33590, St Gilles, France
L. Delaby
Affiliation:
INRA, UMRPL, 33590, St Gilles, France
F. Buckley
Affiliation:
Teagasc, Moorepark Production Research Centre, Fermoy, Co. Cork, Ireland;
M. Rath
Affiliation:
Department of Animal Science and Production, Faculty of Agriculture, U. C. D. Belfield, Dublin 4, Ireland
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Extract

Pre-1990 published responses to supplementation at pasture ranged from 0.4 to 0.6kg milk/kg concentrate fed. However since 1990 higher responses to concentrate supplementation at pasture have been published (Delaby 2001). The objective of this study was to determine if milk production responses of Holstein-Friesian dairy cows to concentrate supplementation at pasture are influenced by genetic merit (milk yield potential) in a spring calving grass based system of milk production.

Type
ISAE/BSAS
Information
Proceedings of the British Society of Animal Science , Volume 2003 , 2003 , pp. 57
Copyright
Copyright © The British Society of Animal Science 2003

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References

Delaby, L., Peyraud, J. L. and Delagarde, R. 2001. Effect of the level of concentrates supplementation, herbage allowance and milk yield at turn out on the performance of dairy cows in mid lactation at grazing. Animal Science 73: 171–181.Google Scholar
Tyrell, H. F. and Reid, J. T. 1965. Prediction of the energy value of cow’s milk. Journal of Dairy Science 48: 1215–1223.CrossRefGoogle Scholar