Response of Fractal Analysis to Soil Quality Succession in Long-Term Compound Soil Improvement of Mu Us Sandy Land, China
Table 1
Particle composition of the compound soil samples with volume mixing ratios of 1 : 1, 1 : 2, and 1 : 5 in the 0–30 cm layer of the experimental field from before planting and 2010–2016.
Soft rock : sand
Particle composition
Before planting
2010
2011
2012
2013
2014
2015
2016
1 : 1
Sand% (0.05–2 mm)
82.59 ± 0.33
76.30 ± 0.60
68.46 ± 0.60
69.20 ± 0.52
67.34 ± 1.05
63.49 ± 0.81
42.83 ± 0.29
40.73 ± 1.04
Silty% (0.002–0.05 mm)
14.57 ± 0.28
18.20 ± 0.66
24.02 ± 0.76
27.36 ± 0.73
29.02 ± 1.06
30.54 ± 0.87
50.67 ± 0.53
49.68 ± 0.73
Clay% (<0.002 mm)
2.84 ± 0.12
5.51 ± 0.32
7.52 ± 0.38
3.44 ± 0.31
3.64 ± 0.27
5.96 ± 0.32
6.50 ± 0.29
9.59 ± 0.50
Texture
Loamy sand
Loamy sand
Sandy loam
Sandy loam
Sandy loam
Sandy loam
Silt loam
Silt loam
D
2.44 ± 0.01a
2.54 ± 0.01c
2.59 ± 0.01e
2.47 ± 0.01b
2.48 ± 0.01b
2.56 ± 0.01d
2.58 ± 0.01e
2.64 ± 0.01f
1 : 2
Sand% (0.05–2 mm)
85.40 ± 0.74
84.18 ± 0.92
82.78 ± 0.07
74.20 ± 0.76
72.51 ± 0.72
67.38 ± 0.82
63.88 ± 0.30
61.58 ± 0.15
Silty% (0.002–0.05 mm)
12.53 ± 0.45
13.17 ± 0.94
13.58 ± 0.05
21.40 ± 0.36
23.03 ± 0.62
27.58 ± 0.93
30.45 ± 0.26
30.81 ± 0.13
Clay% (<0.002 mm)
2.07 ± 0.29
2.65 ± 0.02
3.64 ± 0.05
4.40 ± 0.58
4.46 ± 0.17
5.04 ± 0.11
5.66 ± 0.14
7.61 ± 0.15
Texture
Loamy sand
Loamy sand
Loamy sand
Sandy loam
Sandy loam
Sandy loam
Sandy loam
Sandy loam
D
2.38 ± 0.02a
2.42 ± 0.00b
2.47 ± 0.00c
2.51 ± 0.02d
2.51 ± 0.01d
2.53 ± 0.00e
2.55 ± 0.00e
2.60 ± 0.00f
1 : 5
Sand% (0.05–2 mm)
88.37 ± 0.16
84.34 ± 0.44
82.70 ± 0.21
70.52 ± 0.59
77.18 ± 0.83
76.91 ± 0.47
68.70 ± 0.83
68.23 ± 0.49
Silty% (0.002–0.05 mm)
10.37 ± 0.41
11.79 ± 0.57
14.48 ± 0.17
25.84 ± 0.57
19.30 ± 0.82
19.67 ± 0.47
27.74 ± 0.53
27.42 ± 0.59
Clay% (<0.002 mm)
1.26 ± 0.29
3.87 ± 0.14
2.82 ± 0.04
3.64 ± 0.03
3.52 ± 0.05
3.42 ± 0.02
3.55 ± 0.35
4.35 ± 0.13
Texture
Loamy sand
Loamy sand
Loamy sand
Sandy loam
Loamy sand
Loamy sand
Sandy loam
Sandy loam
D
2.30 ± 0.03a
2.48 ± 0.00c
2.43 ± 0.00b
2.48 ± 0.00c
2.47 ± 0.00c
2.47 ± 0.00c
2.48 ± 0.01c
2.51 ± 0.01d
1Mean values in the table, and different letters within particle FD (D) rows mean significant difference (at 0.05 level) between different planting years in the compound soil of the same proportion in different years and with the same letters are not significantly different at according to a protected LSD test.
