张春慧;呼世斌;贾婵;韩玉婕;

• 1:西北农林科技大学资源环境学院

摘要(Abstract)：

采用盆栽模拟试验,研究了在强化剂乙二胺四乙酸钠(EDTA)、柠檬酸(CA)和钝化剂石灰存在的条件下,土壤存在单一Cd、Cr及复合Cd、Cr污染时,甘蓝型油菜"甘杂1号"(Brassica napus L.)对Cd、Cr的吸收富集效应。结果表明:1)1.6 mg/kg的Cd和170mg/kg的Cr单一及复合污染能够促进油菜的生长;2)当Cd为1.6mg/kg、Cr为170 mg/kg时,10 mmol/kg的EDTA和CA能够有效促进油菜对Cd、Cr的吸收富集,相比对照,无论是单一还是复合污染,其Cd、Cr累积量都有显著增加,但10 mmol/kg的EDTA和CA均抑制了油菜的生长,植株的叶面出现了不同程度的失绿、发黄、脱水、脱落等症状;3)当向污染土壤中添加1.5 g/kg钝化剂石灰时,油菜各部分Cd、Cr的质量比相比对照显著下降,但对油菜的正常生长没有显著影响;4)各部分Cd、Cr质量比随添加强化剂、钝化剂的不同,有明显的变化。研究表明,"甘杂1号"油菜对低浓度Cd、Cr单一及复合污染表现出一定的耐性和吸收能力。

关键词(KeyWords)： 环境学;植物修复;镉、铬污染土壤;油菜;EDTA;柠檬酸;石灰

Abstract:

Keywords:

基金项目(Foundation): 国家863项目(2012AA101404-4)

作者(Authors): 张春慧;呼世斌;贾婵;韩玉婕;

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