Biosolids Application on Banana Production: Soil Chemical Properties and Plant Nutrition
Table 4
Boron and DTPA-extractable metals from SS-treated soil after the first crop cycle at three sampling depths.
Treatment(1)
B(5)
Cu(6)
Fe(6)
Mn(6)
Zn(6)
Cd(6)
Cr(6)
Ni(6)
Pb(6)
mg dm−3
0–20 cm
T0
0.21 b(2)
0.2 c
142 a
1.4 d
0.6 d
0.08 b
0.08 a
0.12 b
0.44 a
TL1
0.21 b
1.3 b
173 a
4.3 c
4.9 c
0.11 ab
<0.01 b
0.17 b
0.49 a
TL2
0.21 b
1.9 b
150 a
6.7 b
8.0 b
0.11 ab
0.04 ab
0.21 ab
0.75 a
TL3
0.27 a
3.0 a
177 a
8.4 a
12.0 a
0.15 a
0.02 ab
0.34 a
0.68 a
TM1
0.20 b
0.1 c
143 a
0.9 d
1.1 d
0.09 b
0.04 ab
0.09 b
0.47 a
TM2
0.22 b
0.2 c
160 a
0.8 d
0.5 d
0.08 b
<0.01 b
0.15 b
0.50 a
VC (%)(3)
18.4
45.6
22.5
27.5
43.2
33.0
154.2
55.2
54.7
Initial(4)
0.36
0.3
182
1.8
0.6
0.09
0.05
0.07
0.09
20–40 cm
T0
0.17 a
0.2 cd
85 c
0.8 d
0.6 d
0.05 ab
<0.01b
0.08 a
0.46 a
TL1
0.18 a
0.6 bc
134 a
2.1 c
2.3 c
0.08 ab
0.03 ab
0.12 a
0.75 a
TL2
0.16 a
0.9 b
114 abc
3.0 b
3.8 b
0.05 ab
0.03 ab
0.14 a
0.52 a
TL3
0.18 a
1.4 a
127 ab
3.9 a
5.9 a
0.09 a
0.05 a
0.18 a
0.62 a
TM1
0.17 a
0.2 d
96 c
0.9 d
0.6 d
0.07 ab
0.04 ab
0.11 a
0.61 a
TM2
0.22 a
0.2 d
99 bc
0.7 d
0.9 d
0.05 b
0.02 ab
0.11 a
0.40 a
VC (%)(3)
22.5
58.5
21.5
33.9
43.6
47.7
97.5
65.9
55.7
Initial(4)
0.32
0.2
127
1.2
0.6
0.07
0.03
0.06
0.08
40–60 cm
T0
0.17 ab
0.2 c
68 c
0.7 c
0.8 c
0.05 bc
<0.01 a
0.12 ab
0.76 a
TL1
0.20 a
0.5 bc
110 a
1.8 b
2.2 c
0.07 abc
0.03 a
0.09 ab
0.63 a
TL2
0.15 b
0.9 b
100 ab
2.8 b
4.1 b
0.08 ab
0.04 a
0.15 ab
0.53 ab
TL3
0.17 ab
1.4 a
120 a
4.4 a
6.5 a
0.10 a
0.02 a
0.19 a
0.62 a
TM1
0.17 ab
0.1 c
80 bc
0.8 c
0.9 c
0.05 bc
<0.01 a
0.07 b
0.61 a
TM2
0.18 ab
0.1 c
78 c
0.7 c
1.5 c
0.04 c
0.02 a
0.07 b
0.31 b
VC (%)(3)
15.8
66.7
16.6
39.9
47.7
48.0
179.7
67.5
37.9
(1)See Section 2. (2)Averages followed by the same letters in columns and soil layer do not differ statistically by the Student’s t-test (). (3)Variation coefficient. (4)Soil sampling prior to the experiment startup (September/01). (5)Hot water extract. (6)DTPA method.
