7320
2
archive
4471
disk0/00/00/73/20
2006-05-10
2009-09-09 13:39:37
2009-08-20 14:30:30
conference_item
show
0
en
- int_conf_joint2006_9
- bolk
May 30-31, 2006
Joint Organic Congress
Odense, Denmark
never
0
TRUE
paper
-
de Wit
Jan
-
Wagenaar
Jan Paul
-
de Vries
Anneke
-
Baars
Ton
Milk fatty acids in relation to feeding practices on Dutch organic farms
pub
- 2security
- 1dairy
fatty acids, omega-3, CLA, distinguisable organic product quality
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.
2006
published
public
5596
1
7320
1
application/pdf
en
public
jan_de_witodense_papermilkdef.pdf
jan_de_witodense_papermilkdef.pdf
102643
http://orgprints.org/7320/1/jan_de_witodense_papermilkdef.pdf
5597
1
7320
2
application/pdf
en
public
7320_Wit.pdf
7320_Wit.pdf
1321091
http://orgprints.org/7320/2/7320_Wit.pdf