de Wit, Jan; Wagenaar, Jan Paul; de Vries, Anneke and Baars, Ton (2006) Milk fatty acids in relation to feeding practices on Dutch organic farms. Paper at: Joint Organic Congress, Odense, Denmark, May 30-31, 2006.
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Summary
Various recent studies have indicated positive interactions between organic animal production and poly-unsaturated fatty acids, particularly CLA and omega-3. In this paper, we present the monitoring results of 15 organic farms concerning the rela-tionship between feeding practices and fatty acid pattern. The results indicate a strong negative effect of maize and grass silage and concentrate feeding on CLA levels in milk fat. On the other hand, feeding fresh grass has a positive effect. Omega-3 levels in milk fat seem less related to feed characteristics: similar relations to those with CLA seem to exist, but feed composition explains the variation in omega-3 levels only to a limited extent, while there is a large farm influence. This might be related to the energy balance of the cows. A comparison of measured CLA and omega-3 levels in organic milk with common levels in conventional milk shows a small difference during the stable period. Effects of adding oil - as a possibility to improve the level of CLA and omega-3 in a way that is organically acceptable - are explored, but effects remain small.
EPrint Type: | Conference paper, poster, etc. |
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Type of presentation: | Paper |
Subjects: | Food systems > Food security, food quality and human health Animal husbandry > Production systems > Dairy cattle |
Research affiliation: | International Conferences > 2006: Joint Organic Congress > Theme 9: Organic animal products: quality and safety Netherlands > Louis Bolk Institute |
Deposited By: | de Wit, Ir. Jan |
ID Code: | 7320 |
Deposited On: | 10 May 2006 |
Last Modified: | 12 Apr 2010 07:32 |
Document Language: | English |
Status: | Published |
Refereed: | Not peer-reviewed |
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