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Effects of lucerne hay and barley grain particle sizes on chewing activity, rumen pH and milk composition of Holstein dairy cows

Published online by Cambridge University Press:  23 November 2017

A.R. Bayat ,
R. Valizadeh  and
A.A. Nasserian
A.R. Bayat*
Affiliation:
Ferdowsi University, Mashhad, Iran
R. Valizadeh
Affiliation:
Ferdowsi University, Mashhad, Iran
A.A. Nasserian
Affiliation:
Ferdowsi University, Mashhad, Iran
*
Email:[email protected]
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Extract

NRC (2001) recommended 250 g/kg dietary neutral detergent fibre (NDF) with a minimum of 190 g/kg dietary forage NDF to prevent milk fat depression. This recommendation does not account for the differences in forage particle size. The forage particle size requirements of dairy cows fed barley grain-based diets can differ from those fed maize grain-based diets (Yang and Beauchemin, 2006). The objective of this experiment was to evaluate the effects of lucerne hay and barley grain particle sizes on chewing activity, rumen pH, milk yield and milk composition using barley grain-based diets.

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2007 , April 2007 , pp. 130
Copyright
Copyright © The British Society of Animal Science 2007

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References

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National Research Council. 2001. Nutrient requirements of dairy cattle. 7th Ed. National Academy Press. Washington, DC.Google Scholar
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