12 / 55
10
J
ournal of
the
A
merican
P
omological
S
ociety
Table 2:
Effects of shoot thinning (ST) and no shoot thinning (NST) and cluster thinning with one (CP1), two (CP2) or three (CP3) clusters per shoot on vegetative
growth, yield parameters and fruit quality of ‘Blanc Du Boisʼ vines in 2013 and 2014.
z
LAI: Leaf area index
y
Pn: Photosynthesis rate
x
TA: Titratable acidity
w
Means followed by different letters within a column indicate significant differences as determined by Tukey's HSD at =0.05.
Table 2. Effects of shoot thinning (ST) and no shoot thinning (NST) and cluster thinning with one (CP1), two (CP2) or three (CP3)
clusters per shoot on vegetative growth, yield parameters and fruit quality of ‘Blanc Du Bois’ vines in 2013 and 2014.
Year
Treatments
Leaf
area
(cm
2
)
Shoot
length
(cm)
LAI
z
Pn
y
before
harvest
(µmol·m
-2
·s-
1
)
Pn after
harvest
(µmol·m
-2
·s
-1
)
Clusters
/vine
Yield
(Kg)/
vine
Cluster
weight
(g)
Berries/
cluster
Berry
weight
(g)
Soluble
Solids
(°Brix)
TA
x
(%)
pH
2013 NST
CP1
27.00
35.28
3.58
12.75 a
w
6.06
10.14
0.48
50.66
25.97
1.82
14.18
0.69
3.71
CP2
24.21
32.80
3.36
11.84 ab
6.64
13.53
0.89
53.41
35.44
1.61
13.18
0.69
3.57
CP3
30.53
38.04
3.55
11.60 ab
6.25
23.95
1.22
51.01
30.86
1.68
12.57
0.75
3.59
ST
CP1
27.40
34.69
2.75
7.89 b
5.99
6.74
0.30
36.33
24.62
1.50
14.73
0.71
3.47
CP2
30.00
31.21
3.19
10.18 ab
6.38
11.52
0.65
47.13
29.45
1.62
13.44
0.88
3.40
CP3
29.79
40.50
2.42
12.00 ab
6.37
11.77
0.87
48.54
29.45
1.47
12.93
0.74
3.40
2014 NST
CP1
67.90
45.00
3.44
8.27
7.27
16.16
0.95
72.62
43.25
1.83
13.83
0.69
3.32
CP2
75.51
45.23
3.92
8.51
6.87
27.10
1.73
69.88
39.67
1.86
13.68
0.69
3.23
CP3
76.76
57.52
2.23
8.17
7.82
14.46
1.00
79.20
48.11
1.83
14.19
0.68
3.24
ST
CP1
72.99
50.17
2.48
8.69
6.12
15.54
1.15
97.81
55.49
2.18
14.60
0.69
3.35
CP2
98.46
43.09
2.48
8.04
7.80
20.74
1.39
85.89
46.30
1.91
13.49
0.70
3.27
CP3
76.67
30.49
2.44
7.50
5.90
18.96
1.28
59.25
37.97
1.68
11.85
0.79
3.18
z
LAI: Leaf area index
y
Pn: Photosynthesis rate
x
TA: Titratable acidity