The Cd concentration in shoot of giant reed increased with the increasing of CA and EDTA addition, of which CA was proved to be more effective (Fig. 2). When CA was applied at level of 1.25, 2.5 and 5.0 mmol/kg soil, Cd concentration in giant reed was 3.26, 3.52 and 3.91 times as much as that in the control, respectively (P