view - Department of Reproduction, Obstetrics and Herd Health

FAME (g/100g)
FAME (g/100g)
FEEDING OMEGA-6 AND OMEGA-3 FATTY ACIDS IN EARLY LACTATION
focused on the effect of dietary 22:6n-3 on BP or FF composition but comparability to FO
studies, at least for MF, has been suggested (AbuGhazaleh et al., 2009). In a study
observing the FA composition in FF collected in the abattoir from crossbred heifers,
higher 20:5n-3 and 22:6n-3 was found when supplementing FO at 2.08 and 41.5 g/kg
DM of the diet (Childs et al., 2008). Zeron et al. (2002) found an enrichment of 18:2n-6
and 22:6n-3 in the PL fraction of FF when feeding FO to ewes. Whereas CE and PL in
HDL seem to be a very poor substrate for the mammary lipoprotein lipase, the HDL
fraction is the largest lipoprotein class in BP (Bauchart, 1993) and FF (Brantmeier et al.,
1987; Wehrman et al., 1991), therefore allowing substantial enrichment in 22:6n-3 as
proven the current and aforementioned studies.
0.25
Cholesterol Esters
0.6
Non Esterified Fatty Acids
0.20
0.15
0.10
0.05
0.00
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
a
b
Phospholipids
a
a
b
b
b
b
Triacylglycerols
-7 14 46 -7 14 46
DIM
DIM
Figure 6. The 22:6n-3 content in g/100g fatty acid methyl esters (FAME) of separated blood plasma lipid
classes of cows fed palm prills (CON:■), sequential short chain n-6 and n-3 fatty acids (SHORT:▲) or
sequential long chain n-6 and n-3 fatty acids (LONG:●) during the transition (n-6) and early breeding (n-3)
period. Differences between diets within the same day are indicated by different labels.
0.5
0.4
0.3
0.2
0.1
0.0
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
a
b
b
a
b
185