摘要
[Objective] To explore a high efficient phytoremediation technology for soil pollution. [Method] Foliage application and root irrigation were carried out to study the influence on amaranth repair efficiency by using combined treatments of phytohor- mones （IAA, GA3 SA） and chelating agents （EDTA）. [Result] The combined treatment increased the biomass of amaranth under 133Cs, 88Sr, Cr stress The 133Cs, 88Sr, Cr enrich- ment in amaranth by root irrigation were obviously higher than that by foliage appli- cation. The phytoextraction efficiency of phytohormones and chelating agents from best to poor was as following： 100 mg/L SA＋1.5 mg/kg EDTA, 500 mg/L GA3＋1.5 mg/kg EDTA, 100 mg/L IAA＋1.5 mg/kg EDTA. [Conclusion] The most appropriate treatment was the combined treatment of 100 mg/L SA＋l.5mg/kg EDTA by soil irri- gation, which could make the total absorption doses of 133Cs, 88Sr, Cr per plant achieve the maximum.
【目的】探寻一种高效的土壤污染植物修复技术。【方法】采用植物激素（IAA、GA3、SA）和螫合剂（EDTA）复合处理分别进行叶面喷施和土壤浇灌．研究其对红苋菜修复效率的影响。[结果]复合处理可增加红苋菜在133Cs、88Sr、Cd胁迫下的生物量，对于133C8、88Sr、Cd的吸收量、转移系数和富集系数，土壤浇灌相比于叶面喷施显著提高了133Cs、88Sr、Cd在红苋菜植株内的富集：3种激素和螯合剂的复合处理效果从好到差依次为100mg／LSA＋1．5mg／kgEDTA、500mg/L GA3＋1．5mg／kg EDTA、100mg／L IAA＋1．5mg／kgEDTA。【结论】土壤浇灌100mg／L SA＋1．5mg／kgEDTA为最适宜处理。使单株红苋菜对133Cs、88Sr、Cd的富集总量达到最大。
基金
Supported by the Plan for the National Defense Basic Scientific Research of the State Administration of Science
Technology and Industry for National Defense of China(b312011)~~
