Milk Fatty Acid Profile of Holstein Cows When Changed from a Mixed System to a Confinement System or Mixed System with Overnight Grazing
Table 1
Chemical composition and fatty acid profile of total mixed ration (TMR) and pasture in two moments (M1 and M3) of the experiment.
M1
M3
Component
TMR
Pasture
TMR
Pasture
DM (%)
66.8
26.7
57.8
21.3
CP (% DM)
16.8
13.6
16.6
10.4
NDF (% DM)
40.4
48.9
35.7
62.0
ADF (% DM)
22.3
24.0
20.5
32.2
Ash (% DM)
6.5
10.1
6.0
10.9
FAs (g/100 g)
C10 : 0
0.06
nd
nd
nd
C12 : 0
0.09
0.22
nd
nd
C14 : 0
0.41
0.63
0.14
0.55
C15 : 0
0.07
nd
0.05
nd
C16 : 0
14.1
25.2
13.5
29.1
C16 : 1 cis
0.41
0.26
0.63
nd
C16 : 1 trans
0.06
1.98
0.1
1.92
C16 : 2
0.04
nd
nd
nd
C17 : 0
0.15
0.85
nd
0.65
C17 : 1 cis
0.07
nd
0.11
nd
C18 : 0
5.6
13.0
5.6
10.3
C18 : 1 cis
37.3
10.6
41.6
9.3
C18 : 1 trans
0.34
0.09
0.37
nd
C18 : 2 cis (n-6)
36.8
14.7
32.6
17.9
C18 : 2 trans
0.42
0.25
0.43
0.22
C18 : 2 (CLA)
0.05
nd
nd
nd
C18 : 3 (n-3)
2.3
25.0
2.2
23.8
C18 : 3 (n-6)
0.03
0.31
nd
0.34
C20 : 0
0.53
1.12
0.77
1.19
C20 : 1 cis
0.55
0.68
0.54
0.75
C20 : 1 trans
0.05
nd
nd
nd
C20 : 2 cis (n-6)
0.15
nd
0.15
nd
C21 : 0
0.04
0.18
0.05
0.18
C22 : 0
0.29
1.73
0.46
1.55
C23 : 0
0.14
0.22
0.1
0.47
C24 : 0
0.36
1.32
0.45
1.82
C25 : 0
0.07
0.27
0.09
0.11
C26 : 0
0.09
1.51
0.08
nd
C28 : 0
0.03
nd
nd
nd
n-3
2.27
25.0
2.17
23.8
n-6
37.0
15.0
37.1
18.2
Ether extract (g/100)
3.48
2.29
3.14
1.91
M1: one month after calving; M3: three months after calving; CP: crude protein; NDF: neutral detergent fiber; ADF: acid detergent fiber; nd: not detected.
