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

Table 8

Coefficients of determination () obtained by multiple linear regression ( for Cd and Pb; for Cu, Ni, and Zn).

	Rhizon	H2O	NaNO3	CaCl2	HOAc	HCl	EDTA	DTPA
Cd	0.29	0.40	0.37	0.27	0.27	0.30	0.28	0.27
Cu	0.86**	0.86**	0.86**	0.89**	0.88**	0.90**	0.89**	0.90**
Ni	0.72**	0.95**	0.95**	0.95**	0.95**	0.96**	0.96**	0.96**
Pb	0.58**	0.50*	0.52*	0.53*	0.49*	0.49*	0.49*	0.53*
Zn	0.43	0.45*	0.61**	0.67**	0.58**	0.56*	0.54*	0.62**

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