Migration and Transformation of Heavy Metals in the Soil of the Water-Level Fluctuation Zone in the Three Gorges Reservoir under Simulated Nitrogen Deposition
Table 1
Physicochemical properties of the original WFLZ soil in the TGR area.
Soil indexes
Content
Background values of WFLZ in the TGRa
Pollution degreeb
pH
8.16 ± 0.13
7.84
n.d
OM (g/kg)
13.92 ± 0.47
n.d
n.d
Bulk density (g/cm3)
1.4 ± 0.14
n.d
n.d
NO3−-N (mg/kg)
2.13 ± 0.007
n.d
n.d
NH4+-N (mg/kg)
179.49 ± 6.47
n.d
n.d
Al (%)
3.98 ± 0.38
n.d
n.d
Fe (%)
4.88 ± 0.49
n.d
n.d
Mn (mg/kg)
1018.66 ± 149.05
n.d
n.d
Cd (mg/kg)
2.63 ± 0.67
0.321
High
Cr (mg/kg)
76.82 ± 5.89
55.5
Clean
Cu (mg/kg)
37.17 ± 5.13
37
Clean
Ni (mg/kg)
48.46 ± 0.95
29.5
Clean
Pb (mg/kg)
65.80 ± 7.64
29.3
Clean
Zn (mg/kg)
166.82 ± 21.89
72.7
Clean
aBackground values of WFLZ in the TGR [13]. bEvaluation by single factor index method [12]. n.d. means no data.
