Abstract:

To find out whether the improved phosphogypsum matrix can be used as farmland or not, chinese cabbage, Brassicachinensis, Brassica juncea Cosson and spinach were chosen to be planted on the improved phosphogypsum matrix. The characteristics of enrichment and migration of Cd and Zn in different parts of 4 vegetables were analyzed. The results showed that the contents of Cd and Zn in 4 vegetables were 0.004-0.039 mg/kg and 45.56-361.89 mg/kg, respectively. Cd could meet safety qualification for agricultural product-safety requirements for non-environmental pollution vegetable, however, Zn could not meet this standards. The rule of Cd and Zn distributed in different parts was ranked as root>stem>leaf. The enrichment coefficients of Cd and Zn were 0.23-0.47 and 0.90-3.19, respectively, moreover, Zn＞Cd, showing enrichment ability of Zn was stronger than Cd and Zn could be easily absorbed by vegetables. The migration rate of Cd and Zn in vegetable showed as underground parts＞ground parts.