Phytoremediation of Cadmium Pollution and Enzyme Activity in Soil

The absorption, concentration and phytoremediation of cadmium in soil, relationship between concentration of cadmium and enzyme activity in soil, and the effect of phytoremediation on enzyme activity in soil over time by pot-planting method were studied. Our results show that ①plants have capacity of absorption, concentration and remediation on cadmium pollution in soil, but the capacity varies with different plant species; ②urease activity in soil decreases with the increase of cadmium concentration in soil;③urease activity in soil is found to be closely correlative with concentration of cadmium in soil by regression analysis so that the urease activity can be used to indicate the degree of cadmium pollution in soil; ④the urease activity in soil polluted by cadmium is recovered by phytoremediation,and the degree of phytoremediation can be judged according to the degree of recovery of the urease activity in the soil.