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The effect of level of feeding on persistency of milk yield of Ayrshire cows

Published online by Cambridge University Press:  02 September 2010

D. G. Filmer ,
P. Roberts ,
K. A. Mines  and
H. M. Clarkson
D. G. Filmer
Affiliation:
Crosfields and Calthrop Ltd, Vauxhall Road, Liverpool
P. Roberts
Affiliation:
BOCM Silcock Ltd, Basing View, Basingstoke, Hampshire
K. A. Mines
Affiliation:
Bridge Cottage, Bettisfield, Whitchurch, Shropshire
H. M. Clarkson
Affiliation:
Agricultural Development and Advisory Service, Ministry of Agriculture, Fisheries and Foods, Elvet House, Hallgarth Street, Durham
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Summary

1. Twenty-four Ayrshire cows were used in a changeover experiment to investigate the effects on milk yield of offering concentrates at three rates of feeding (220, 250 and 290 g SE/kg milk) and two nutrient densities (63·5 and 72·5 SE). Nutrient density had no effect on milk yield but there was a positive relationship between rate of feeding and persistency.

2. A regression equation relating log10 (—log10 persistency) to the rate of feeding (g SE/kg milk) was fitted to the data and accounted for 92·3 % of the variation between treatments.

Type
Research Article
Information
Animal Production , Volume 14 , Issue 3 , June 1972 , pp. 309 - 315
Copyright
Copyright © British Society of Animal Science 1972

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References

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