Sewage Sludge Amendment Combined with Green Manuring to a Coastal Mudflat Salt-Soil in Eastern China: Effects on Soil Physicochemical Properties and Maize Yield
Table 2
Effects of sewage sludge amendment (SSA) combined with green manuring on the size composition of soil water-stable aggregates at 0–20 cm and 20–40 cm depths of coastal mudflat salt-soil.
Year
SSA (t ha−1)
Water-stable aggregates (%)
0–20 cm depth
20–40 cm depth
>0.25 mm
0.106–0.25 mm
<0.106 mm
>0.25 mm
0.106–0.25 mm
<0.106 mm
2013
0
3.33 ± 1.42
0.98 ± 0.16
95.71 ± 1.92
0.61 ± 0.35
0.59 ± 0.06
98.80 ± 0.29
30
3.58 ± 1.50
1.33 ± 0.60
95.11 ± 3.09
2.98 ± 2.81
0.77 ± 0.32
96.25 ± 3.13
75
4.32 ± 2.35
1.09 ± 0.45
94.60 ± 2.80
1.02 ± 0.61
0.52 ± 0.03
98.46 ± 0.58
150
7.38 ± 2.58
1.75 ± 0.47
90.87 ± 3.04
2.31 ± 0.96
0.81 ± 0.19
96.88 ± 1.15
300
11.58 ± 2.69
2.97 ± 0.98
85.46 ± 4.17
1.20 ± 0.10
0.50 ± 0.06
98.30 ± 0.16
-value
7.77
5.59
5.80
1.44
1.07
1.05
2014
0
13.00 ± 2.17
3.18 ± 0.95
83.83 ± 1.46
0.99 ± 0.19
0.50 ± 0.06
98.51 ± 0.13
30
16.26 ± 7.23
3.41 ± 0.38
80.34 ± 7.57
0.68 ± 0.45
0.59 ± 0.06
98.73 ± 0.38
75
25.49 ± 7.58
5.11 ± 2.08
69.40 ± 9.62
1.97 ± 1.95
0.77 ± 0.32
97.26 ± 2.27
150
26.72 ± 2.43
5.12 ± 0.46
68.16 ± 2.41
2.22 ± 1.09
0.72 ± 0.32
97.06 ± 1.41
300
31.65 ± 2.93
6.84 ± 4.45
61.51 ± 7.27
1.45 ± 0.26
0.61 ± 0.10
97.94 ± 0.35
-value
6.98
5.72
6.04
0.78
0.541
0.73
Values are mean ± SD of three replicates. Different letters in each column indicate significant difference at by LSD’s multiple range test. Values of are the test in ANOVA; ;;.
