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The Influence of Genetic Merit For Milk Production on the Response to Complete Diet Feeding

Published online by Cambridge University Press:  21 November 2017

D.C. Patterson ,
F.J. Gordon  and
C.S. Mayne
D.C. Patterson
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co.Down BT26 6DR
F.J. Gordon
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co.Down BT26 6DR
C.S. Mayne
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co.Down BT26 6DR
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Extract

In two previous studies at this Institute, premixing of the silage and concentrate elements of the diet prior to feeding (complete diet feeding) produced either no increase in intake and milk production (Agnew and Mayne, 1992) or a slight increase in intake with no response in milk production (Agnew and Mayne, 1990). However the maximum proportions of concentrate dry matter intake (DMI) in the diets used in these experiments were 0.54 and 0.51 respectively. With the present rapid increases in cow genetic merit, across the industry, coupled with possible changes in the relative costs of feed grains and ensiled grass, there is a need to explore the response to complete diet feeding with animals of high genetic merit receiving higher proportions of concentrates. The current study therefore examined the response to complete diet feeding and its interaction with genetic merit of the cow, when using high concentrate diets.

Type
Milk Production
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1994 , March 1994 , pp. 41
Copyright
Copyright © The British Society of Animal Production 1994

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References

reference

Agnew, K.W. and Mayne, C.S. (1990). An evaluation of the effect of method of concentrate feeding on yield and composition of milk of dairy cows offered a grass silage based diet. In: Proceedings 2nd British Grassland Society Research Conference, Session VII. Paper 2.Google Scholar
Agnew, K.W. and Mayne, C.S. (1992). An examination of the effect of type of concentrate and method of concentrate feeding on the milk production of British Friesian dairy cows offered grass silage based diets. Animal Production 54, 459 Abstr.Google Scholar