Rice seedings were planted on the soil treated with different amount of cadmium as CdCl2.There were five cadmium treatments in this study,i.e.O (control), 50, 100, 200 and 400 ppm of Cd. The growth and development of the treated plants were inhibited and their spectral reflection properties were changed .In the visible region of spectrum,the reflectance increased,among which in the 500-680 nm waveband,the increase of reflectance was remarkable.The first-and second-spectra showed a chlorophyll absorption edg...