Plantain-Tree Rubber Intercropping Systems Improved Productivity in the Tropical Humid Zone of Ghana, West Africa
Table 1
Stem girth and height growth of rubber tree at Ellembelle and Jomoro.
Treatments
Girth (mm) Ellembelle
4 MAP
5 MAP
6 MAP
7 MAP
8 MAP
9 MAP
11 MAP
R
5.25
6.08
6.99
8.64
10.27
11.73
14.76
PR
5.78
6.88
8.00
9.32
10.56
12.57
16.24
PPR
6.33
7.36
8.53
10.18
11.07
12.92
17.49
PPPR
6.93
8.00
9.17
11.30
13.21
14.39
18.22
SED (5%)
0.19
0.13
0.21
0.55
0.60
0.44
0.42
CV (%)
3.90
2.30
3.10
6.80
6.50
6.90
3.10
Treatments
Girth (mm) Jomoro
4 MAP
5 MAP
6 MAP
7 MAP
8 MAP
9 MAP
10 MAP
11 MAP
12 MAP
13 MAP
15 MAP
R
12.30
19.77
23.63
25.57
27.95
32.40
35.54
38.59
41.96
45.34
54.88
PR
14.28
21.22
25.12
28.73
32.85
35.50
38.42
41.10
44.40
47.39
55.67
PPR
16.32
22.57
28.94
31.89
36.40
39.34
43.48
44.64
47.43
50.72
61.33
PPPR
17.72
25.58
32.05
36.08
39.66
41.88
45.08
47.71
50.16
52.41
64.33
SED (5%)
0.50
0.59
0.21
0.31
0.65
0.47
0.78
0.28
0.45
0.41
0.47
CV (%)
4.10
3.20
1.00
1.20
2.30
1.50
2.40
0.80
1.20
1.00
1.00
Treatments
Height (cm) Ellembelle
4 MAP
5 MAP
6 MAP
7 MAP
8 MAP
9 MAP
11 MAP
R
27.60
32.30
34.60
40.80
54.00
61.40
81.90
PR
26.60
29.40
36.70
38.70
54.60
65.30
98.10
PPR
28.20
32.80
38.80
49.10
57.90
67.80
103.60
PPPR
41.20
48.20
45.00
56.40
69.20
83.60
120.50
SED (5%)
5.76
NS
NS
NS
NS
NS
3.55
CV (%)
22.90
26.70
14.60
20.30
15.90
13.40
4.30
Treatments
Height (cm) Jomoro
4 MAP
5 MAP
6 MAP
7 MAP
8 MAP
9 MAP
10 MAP
11 MAP
12 MAP
13 MAP
15 MAP
R
37.78
42.78
58.84
72.19
81.91
115.30
138.50
161.67
203.67
236.80
305.90
PR
42.65
47.65
60.52
79.67
87.56
129.44
150.49
176.78
227.06
252.60
335.40
PPR
48.67
56.08
66.50
86.50
95.89
139.06
161.29
197.44
242.57
282.60
351.80
PPPR
52.78
61.33
69.30
100.11
109.43
154.72
181.33
207.54
259.41
317.90
371.70
SED (5%)
0.53
0.43
0.56
1.01
1.47
1.20
1.11
1.48
1.82
3.24
3.73
CV (%)
1.40
1.00
1.10
1.50
1.90
1.10
1.00
1.00
1.00
1.50
1.30
MAP = months after planting; R = sole rubber; PR = low-density plantain; PPR = medium-density plantain; PPPR = high-density plantain; NS = not significant; SED = standard error of the difference; CV = coefficient of variation.