Feasibility of phosphate fertilizer to immobilize cadmium in a field conditions

摘要：

Contrary to our expectations, soil Cd extractability and Cd concentrations in radish dry matter increased significantly with increasing fused and superphosphate (FSP) application in the field. To determine the effect of FSP on Cd immobilization, FSP was mixed with the selected soil at a rate of 0, 200, 400, 800, and 1600mg (P)·kg<-1> and then incubated for 8 weeks. As observed in the field study, exchangeable Cd concentrations increased slightly with a FSP addition of 400mg (P)· kg<-1> and thereafter significantly decreased with higher application rates. Soil pH and negative charge decreased with 400mg (P)·kg<- 1> FSP addition and then significantly increased with further increasing application. Based on these results, FSP might be applied at a very high rate (>800mg (P)·kg<-1>) to decrease Cd extractability in the selected field. The feasibility of FSP to reduce Cd extractability in the field is very low.

关键词： Cadmium Cd immobilization fused and superphosphate radish upland soil

作者: C. O. Hong P. J. Kim

作者单位: Division of Applied Life Science, Graduate School, Gyeongsang National University, 900, Kaswa-dong, Division of Applied Life Science, Graduate School, Gyeongsang National University, 900, Kaswa-dong,

会议类型: 国际会议

会议名称: 第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)

会议地点: 北京

会议语种:英文

页码: 178-179

在线出版日期: 2007-07-15（万方平台首次上网日期，不代表论文的发表时间）