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Effects of starch level and forage particle length on the performance, milk fatty acid profile and production of trans-10, cis-12 conjugated linoleic acid in dairy ewes

Published online by Cambridge University Press:  23 November 2017

W.M.P.B Weerasinghe ,
R.G Wilkinson  and
L.A Sinclair
W.M.P.B Weerasinghe*
Affiliation:
Harper Adams University College, Newport, Shropshire, TF10 8NB, United Kingdom
R.G Wilkinson
Affiliation:
Harper Adams University College, Newport, Shropshire, TF10 8NB, United Kingdom
L.A Sinclair
Affiliation:
Harper Adams University College, Newport, Shropshire, TF10 8NB, United Kingdom
*
Email:tweerasinghe@harper-adams.ac.uk
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Extract

Feeding high starch, low fibre diets to ruminants has been shown to decrease milk fat content (Choi et al. 2005). This effect may be due to the production of trans-10, cis-12 CLA in the rumen, which is a known inhibitor of milk fat synthesis in ruminants. Forage particle length may also have an influence on milk fat synthesis by altering ruminal pH (Beauchemin et al., 2003) and subsequently the production of trans-10, cis-12 CLA. The objectives of the current study were to evaluate the effects of starch content and forage particle length on the performance and production of trans-10, cis-12 CLA in dairy ewes.

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2008 , 2008 , pp. 122
Copyright
Copyright © The British Society of Animal Science 2008

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References

Beam, T.M., Jenkins, T.C., Moate, P.J., Kohn, R.A. and Palmquist, D. L. 2000. Effects of amount and source of fat on the rates of lipolysis and biohydrogenation of fatty acids in ruminal contents. Journal of Dairy Science 83: 2564–2573.CrossRefGoogle ScholarPubMed
Choi, N.J., Imm, J.Y., Oh, S., Kim, B.C., Hwang, H.J. and Kim, Y.J. 2005. Effect of pH and oxygen on conjugated linoleic acid (CLA) production by mixed rumen bacteria from cows fed high concentrate and high forage diets. Animal Feed Science and Technology 124: 643–653.Google Scholar