6CACADOR I. Accumulation of Zn, Pb, Cu, Cr and Ni in sedimentsbetween roots of the Tagus Estuany salt marshes, Portugal[J]. Estuafine, Coastal and Shelf Science, 1996, 42: 393-403.
7CHEN N-C AND CHEN H-M. Chemical behavior of cadmium in wheat rhizosphere[J]. Pedosphere J Plant Nutr, 1987,10:1185-1195.
8MENCH M. Metal binding properties of high molecular weight soluble exudates from maize roots[J]. Biol Ferti Soils, 1987, 3:165-169.
9MENCH M. Metal binding with root exudates of low molecular weght[J]. Journal of Soil Science, 1988, 39: 527-527.
10LUO Y-M, CHRISTIE P, BAKER A J M. Soil solution Zn and pH dynamics in non-rhizosphere soil and in the rhizosphere of Thlaspi caerulescens grown in a Zm/Cd contaminated soil[J]. Chemosphere,2000, 41: 161-164.