| 超富集植物藿香蓟(Ageratum conyzoides L.)对镉污染农田的修复潜力 |
| 摘要点击 2297 全文点击 891 投稿时间：2018-10-15 修订日期：2018-11-25 |
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| 中文关键词 藿香蓟 镉 植物修复 农田修复 |
| 英文关键词 Ageratum conyzoides L. cadmium phytoremediation farmland |
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| 中文摘要 |
| 为探究超富集植物藿香蓟（Ageratum conyzoides L.）对镉（Cd）污染农田土壤的修复潜力，通过野外调查，原土盆栽试验和田间试验，测定藿香蓟及其根系土壤Cd含量，计算藿香蓟的富集系数和去除率.结果表明，野外调查中不同铅锌矿区生长的藿香蓟叶片中Cd含量最大值为77.01mg·kg-1，盆栽试验中，高含量Cd土壤处理（T2）中，地上部Cd积累量达到69.71 mg·kg-1，其地上部Cd富集系数为6.09，在低含量Cd土壤处理（T1）中，藿香蓟对Cd的富集特性与其在高含量条件下对Cd的富集特性一致.藿香蓟对Cd表现出稳定的积累特性.田间试验中，污染区藿香蓟中地上部Cd含量均值为21.13 mg·kg-1，富集系数为6.93，使用藿香蓟修复Cd污染土壤每亩地种植三茬藿香蓟的去除率为13.2%~15.6%.使用超富集植物藿香蓟修复农田Cd污染具有较好的工程应用前景. |
| 英文摘要 |
| To evaluate the remediation potential of Ageratum conyzoides L. on cadmium (Cd) contaminated farmland soil, the Cd-containing plants and root were collected and analyzed by field investigation, original pot experiment, and field experiment. The enrichment factor and removal rate of Ageratum conyzoides L. was calculated. The results showed that the maximum Cd content in the leaves of Ageratum conyzoides L. growing in soil of different lead-zinc mines was 77.01 mg·kg-1. In the high-concentration Cd soil treatment (T2), Cd content of the above-ground of Ageratum conyzoides L. was 69.71mg·kg-1, and Cd enrichment coefficient was 6.09. In the low-concentration Cd soil treatment (T1), the enrichment characteristics of Cd (Ageratum conyzoides L.) are consistent with the enrichment characteristics of Cd under high concentration conditions. Ageratum conyzoides L. exhibits stable accumulation characteristics for Cd. In the field experiment, the average Cd content of Ageratum conyzoides L. was 21.13 mg·kg-1, and the enrichment coefficient was 6.93. The removal rate of the three planting Ageratum conyzoides L. per mu of soil using the Ageratum conyzoides L. to repair Cd contaminated soil was 13.2%-15.6%. The use of Ageratum conyzoides L. to repair Cd pollution in farmland has a good prospect for engineering application. |
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