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Effect of lipid supplementation on digestion of nutrients in steers

Published online by Cambridge University Press:  05 November 2021

N.J. Choi ,
M. Enser ,
J.D. Wood  and
N.D. Scollan
N.J. Choi
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth SY23 3EB, UK Division of Food Animal Science, University of Bristol, Longford, Bristol, BS18 7DY, UK
M. Enser
Affiliation:
Division of Food Animal Science, University of Bristol, Longford, Bristol, BS18 7DY, UK
J.D. Wood
Affiliation:
Division of Food Animal Science, University of Bristol, Longford, Bristol, BS18 7DY, UK
N.D. Scollan
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth SY23 3EB, UK
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Extract

Lipids are commonly used in ruminant diets to increase the energy density of the ration and increasingly to manipulate the fatty acid (FA) composition of the final product (meat or milk). However, lipids may have negative effects on rumen function and in particular on the extent of carbohydrate digestion, which is accompanied by alterations in volatile fatty acid proportions, towards less acetate and more propionate. These alternations are more pronounced for lipids high in polyunsaturated fatty acids particularly linolenic acid (18:3n-3; found in linseed). However, there is some evidence to suggest that the opposite is true for longer chain C20 FAs, found in fish oil (Doreau and Chilliard, 1996). This experiment has examined the impact of lipid sources differing in their FA composition (saturated compared polyunsaturated FA) on digestion of nutrients in the rumen and small intestine.

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Programme
Information
Proceedings of the British Society of Animal Science , Volume 1998 , 1998 , pp. 222
Copyright
Copyright © The British Society of Animal Science 1998

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References

Doreau, M & Chilliard, Y. 1996. Fat digestion and metabolism in domestic animals. In Fats in the Diet of Animals and Man. pp. 41 [Givens, D.I., editor]. Birmingham: Proceedings of ADAS Conference.Google Scholar
Scollan, N.D., Fisher, W J., Davies, D.W.R., Fisher, A.V., Enser, M. and Wood, J.W. 1997. Manipulating the fatty acid composition of muscle in beef cattle. Proceedings of the British Society of Animal Science, 20.Google Scholar