Abstract: A soil remediation improver was prepared for heavy metal cadmium from contaminated farmland in Jiangxi province. The soil remediation improver is a kind of mixed fertilizer formed by mixing biochar and fertilizer in a certain proportion. Taking early and late rice as materals, seven treatments, including five different soil remediation improver treatments and two control of no fertilizer and conventional fertilization,were set up to test whether the soil remediation improver could reduce the cadmium content of rice seed in cadmium polluted farmland. The results showed that the Cd content in rice decreased with the increase of the amount of soil remediation improver,and the yield was no significant difference between soil remediation improver treatments and the conventional fertilization control.

Key words: cadmium pollution, soil remediation improver, preparation, application