Evaluation of Phytoavailability of Heavy Metals to Chinese Cabbage (Brassica chinensis L.) in Rural Soils
Table 6
Pearson linear correlation coefficients between heavy metal extracted from the soil with different extraction methods and concentrations in the root and shoot of Chinese cabbage ( for Cd and Pb; for Cu, Ni, and Zn).
Cd
Cu
Ni
Pb
Zn
Root
Rhizon
−0.19
−0.25
−0.05
0.05
−0.12
H2O
−0.21
0.69**
0.97**
−0.30
0.50
NaNO3
0.04
0.69**
0.27
−0.14
0.50
CaCl2
−0.28
0.79**
0.19
−0.21
0.53*
HOAc
−0.09
0.71**
0.21
0.55*
0.43
HCl
−0.30
0.68**
0.56*
0.20
0.51
EDTA
−0.28
0.66**
0.80**
−0.33
0.52*
DTPA
−0.24
0.67**
0.64**
−0.20
0.54*
Aqua regia
−0.21
0.69**
0.97**
−0.18
0.45
Shoot
Rhizon
−0.05
−0.13
−0.07
−0.14
−0.06
H2O
0.06
0.89**
0.72**
−0.06
0.65**
NaNO3
0.31
0.69**
0.80**
−0.37
0.74**
CaCl2
0.14
0.93**
0.75**
−0.40
0.73**
HOAc
0.04
0.90**
0.75**
0.27
0.75**
HCl
−0.22
0.91**
0.94**
0.17
0.66**
EDTA
−0.14
0.91**
0.97**
0.21
0.66**
DTPA
−0.04
0.91**
0.96**
−0.13
0.69**
Aqua regia
0.11
0.91**
0.80**
0.12
0.60**
Significant at the 0.01 level, significant at the 0.05 level.
