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Effect of caustic-treated linseed on the composition of cow's milk

Published online by Cambridge University Press:  05 November 2021

R M Kirkland ,
J.R. Scaife  and
M. Goodwill
R M Kirkland
Affiliation:
Department of Agriculture, University of Aberdeen, 581 King Street, Aberdeen, AB24 5UA, UK
J.R. Scaife
Affiliation:
Department of Agriculture, University of Aberdeen, 581 King Street, Aberdeen, AB24 5UA, UK
M. Goodwill
Affiliation:
Harbro Farm Sales Ltd., Markethill, Turriff, Aberdeenshire, AB53 4PA
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Extract

In ruminant diets, whole oilseeds are potential sources of polyunsaturated fatty acids (PUFA), which, because they are protected by the intact seed pericarp, may escape rumen biohydrogenation (Murphy et. al., 1990). Some seed coats are highly resistant to microbial and enzymic digestion and seed lipids may therefore be poorly degraded. Mild chemical treatment of oilseeds with sodium hydroxide has been suggested as a way to allow only limited ruminal lipid digestion but more extensive intestinal digestion of seed lipids (Aldrich et. al., 1997). Such treatments may allow the manipulation of milk composition by strategic use of selected oilseeds. Linseed is rich in C18:3n-3, an essential component of a healthy human diet which is normally only present at low levels in cows milk. This study evaluated the effect of inclusion of caustic-treated linseed in dairy cow rations on the protein, fat and fatty acid composition of milk

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Information
Proceedings of the British Society of Animal Science , Volume 1998 , 1998 , pp. 220
Copyright
Copyright © The British Society of Animal Science 1998

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References

References:

Aldrich, C.G., Merchen, N.R., Drackley, J.K., Gonzalez, S. S. Fahey, G C. Jnr., and Berger, L.L. (1997) The effects of chemical treatment of whole canola seed on lipid and protein deposition in steers. J. Anim. Sci. 57 502–511.CrossRefGoogle Scholar
Murphy, J. J., McNeill, G. P., Conolly, J. F. and Gleeson, P. (1990) Effects on cow performance and milk fat composition of including full-fat soyabeans and rapeseed in the concentrate mixture for lactating dairy cows. J. Dairy Res. 57 295–306.10.1017/S0022029900026947CrossRefGoogle Scholar