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Incremental effects of ground rapeseed on digestion in lactating dairy cows

Published online by Cambridge University Press:  20 November 2017

C.K. Reynolds ,
D. J. Humphries ,
J. D. Sutton ,
B. Lupoli  and
D.E. Beever
C.K. Reynolds
Affiliation:
Centre for Dairy Research, Department of Agriculture, University of Reading, Earley Gate, Reading RG6 6AR, UK
D. J. Humphries
Affiliation:
Centre for Dairy Research, Department of Agriculture, University of Reading, Earley Gate, Reading RG6 6AR, UK
J. D. Sutton
Affiliation:
Centre for Dairy Research, Department of Agriculture, University of Reading, Earley Gate, Reading RG6 6AR, UK
B. Lupoli
Affiliation:
Centre for Dairy Research, Department of Agriculture, University of Reading, Earley Gate, Reading RG6 6AR, UK
D.E. Beever
Affiliation:
Centre for Dairy Research, Department of Agriculture, University of Reading, Earley Gate, Reading RG6 6AR, UK
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Extract

Crushed rapeseed and other oil seeds offer an economical source of fat and protein in diets for lactating dairy cows, but the potential inhibitory effects of their unsaturated fatty acids on fibre digestion in the rumen are a concern. Feeding crushed rapeseed in a grass silage-based ration increased milk yield without affecting intake (Reynolds et al., 1998), and had no measurable effects on rumen or total tract digestion (Reynolds et al., 2000). In a companion study, feeding increasing amounts of ground rapeseed in a maize silage-based ration decreased DM intake at higher levels of inclusion (Reynolds et al., 2002). This effect may reflect metabolic effects of rapeseed fatty acid absorption, or negative effects of rapeseed oil on rumen fermentation and fibre digestion. The present study was conducted simultaneously to the production study to determine the incremental effects of ground rapeseed on rumen, post-rumen and total tract digestion in lactating dairy cows fed maize silage-based rations.

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2002 , 2002 , pp. 107
Copyright
Copyright © The British Society of Animal Science 2002

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References

Reynolds, C.K., Phipps, R.H., Jones, A.K. and Beever, D.E. 1998. Milk production response of lactating dairy cows to dietary fat from three sources. Proceedings of the British Society of Animal Science, p. 223 Google Scholar
Reynolds, C. K., Humphries, D. J., Sutton, J. D., Lupoli, B., Phipps, R. H. and Beever, D. E. 2000. Rumen and post-rumen digestion in lactating dairy cows fed fat from three sources. Proceedings of the British Society of Animal Science, p. 91.Google Scholar
Reynolds, C.K., Phipps, R. H., Jones, A. K., Lupoli, B. and Beever, D. E. 2002. Production response of lactating dairy cows fed increasing amounts of ground rapeseed. Proceedings of the British Society of Animal Science, submitted.Google Scholar