农业环境科学学报2012，Vol.31Issue(2)：312-317,6.
不同钝化剂配施硫酸锌对石灰性土壤中镉生物有效性的影响研究
Cadmium Phytoavailability to Cowpea Decreased by Rape Straw and Red Mud with Zinc Sulphate in a Calcareous Soil
摘要
Abstract
To reduce Cd phytoavailability in calcareous soils, the effects of soil amendments of red mud, rape straw, corn straw and red mud plus rape straw in combination with zinc fertilization on Cd extractability and phytoavailability to cowpea were investigated in a calcareous soil with added Cd at 1.5 mg·kg-1. The results showed that water soluble and exchangeable Cd in soils was significantly decreased by the a-mendments, which resulted in significant decrease by about 27%(corn straw)~83%(red mud plus rape straw) in Cd concentration in cowpea. Combined with amendments, Zn fertilization further decreased the Cd concentration in cowpea. Compared with amendments only, the concentrations of Cd in the edible parts of cowpea treated with the Zn fertilization plus amendments decreased by 27% on average. Also cruciferous rape straw was more effective than gramineous com straw. In all treatments, rape straw plus red mud combined with Zn fertilization was most effective in decreasing Cd phytoavailability to cowpea in soils, and it is potential to be an efficient, cost-effective and environmentally friendly measure to ensure food safety for crop production in mildly Cd-contaminated and calcareous soils.关键词
镉/石灰性土壤/豇豆/钝化剂/修复Key words
cadmium/ calcareous soil/ cowpea/ amendments/ remediation分类
资源环境引用本文复制引用
丁琼,杨俊兴,华珞,左余宝,马义兵..不同钝化剂配施硫酸锌对石灰性土壤中镉生物有效性的影响研究[J].农业环境科学学报,2012,31(2):312-317,6.基金项目
公益性行业(农业)科研专项(20090315) （农业）
