The Scientific World Journal

Research Article

Evaluation of Phytoavailability of Heavy Metals to Chinese Cabbage (Brassica chinensis L.) in Rural Soils

Table 7

Pearson linear correlation coefficients between extractable heavy metal concentrations and soil properties .


	pH					OC
Extraction	Cd	Cu	Ni	Pb	Zn	Cd	Cu	Ni	Pb	Zn

Rhizon	−0.43*	0.11	−0.08	−0.30	−0.09	−0.08	−0.07	−0.07	−0.11	−0.07
H₂O	−0.24	0.21	−0.01	−0.41*	−0.19	−0.20	−0.02	0.05	−0.08	0.01
NaNO₃	−0.41*	−0.35	−0.11	−0.45*	−0.27	−0.08	0.53**	0.12	−0.06	0.34
CaCl₂	−0.41*	−0.26	−0.06	−0.42*	−0.14	−0.08	0.18	0.06	−0.07	0.16
HOAc	−0.37	−0.20	−0.32	−0.41*	−0.38	−0.11	0.13	0.93**	−0.08	0.31
HCl	−0.36	0.25	0.34	0.23	0.27	−0.09	−0.08	−0.07	−0.14	−0.09
EDTA	−0.35	0.37	0.13	0.27	0.36	−0.09	−0.09	0.01	−0.13	−0.10
DTPA	−0.39	0.35	−0.04	−0.12	0.24	−0.09	−0.08	0.07	−0.14	−0.03
Aqua regia	−0.26	0.38	0.20	0.27	0.36	−0.10	−0.09	−0.04	−0.13	−0.10

	CEC					EC
Extraction	Cd	Cu	Ni	Pb	Zn	Cd	Cu	Ni	Pb	Zn

Rhizon	−0.16	−0.10	−0.03	−0.10	−0.03	−0.12	0.15	−0.07	−0.14	−0.09
H₂O	−0.22	0.01	0.47*	−0.15	0.04	−0.02	0.27	−0.12	−0.11	−0.16
NaNO₃	−0.15	0.41	0.27	−0.13	0.36	−0.10	0.20	−0.12	−0.12	0.00
CaCl₂	−0.15	0.21	0.19	−0.14	0.18	−0.10	−0.13	−0.09	−0.11	−0.02
HOAc	−0.17	0.14	0.86**	−0.14	0.30	−0.07	−0.12	−0.13	−0.10	−0.24
HCl	−0.17	−0.11	−0.04	−0.25	−0.12	−0.07	−0.10	0.50	0.37	−0.04
EDTA	−0.17	−0.17	0.32	−0.23	−0.16	−0.02	0.43	0.01	0.39	0.34
DTPA	−0.16	−0.15	0.37	−0.24	−0.07	−0.07	0.55	−0.11	0.00	0.36
Aqua regia	−0.21	−0.17	0.29	−0.24	−0.16	0.13	0.59	0.15	0.41*	0.34

						Clay
Extraction	Cd	Cu	Ni	Pb	Zn	Cd	Cu	Ni	Pb	Zn

Rhizon	−0.12	0.00	−0.07	−0.38	0.03	0.52**	−0.17	0.03	0.37	0.07
H₂O	−0.11	0.32	−0.20	−0.12	0.36	0.44*	0.05	0.21	0.52**	0.37
NaNO₃	−0.13	0.05	0.25	−0.14	0.22	0.50**	0.20	0.32	0.51**	0.38
CaCl₂	−0.13	0.29	0.29	−0.14	0.33	0.51**	0.42*	0.30	0.51**	0.32
HOAc	−0.18	0.37	−0.10	−0.12	0.30	0.48**	0.31	0.26	0.51**	0.46*
HCl	−0.09	0.37	0.22	0.16	0.36	0.47*	−0.24	−0.16	−0.18	−0.25
EDTA	−0.10	0.28	0.14	0.18	0.32	0.46*	−0.29	0.16	−0.22	−0.27
DTPA	−0.12	0.27	0.13	0.07	0.37	0.50**	−0.22	0.35	0.19	−0.05
Aqua regia	−0.07	0.20	−0.04	0.16	0.32	0.40	−0.29	0.04	−0.21	−0.27

Significant at the 0.01 level, significant at the 0.05 level.