Impact of Na2SiO3 on rice cadmium absorption from soil polluted by cadmium.

Sodium silicate's impact on rice yield and Cd content in brown rice in contaminated soil was studied. When the amounts of cadmium of 7.6g·kg-1 and 8mg·kg-1 were applied, the cadmium content in brown rice was relatively high. When the sodium silicate of 2.23g·kg-1 and the amount of cadmium of 2.4g·kg-1 were applied, cadmium accumulation was low and grain yield was high. Serious Cd polluted soil produce low rice yield and high Cd content in brown rice. Application of sodium silicate could increase rice yield and reduce the Cd content in brown rice. The more amounts the sodium silicate were added, the lower Cd content would be in the brown rice.