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中国农学通报

中国农学通报 ›› 2018, Vol. 34 ›› Issue (5): 74-77.doi: 10.11924/j.issn.1000-6850.casb17020021

所属专题： 土壤重金属污染； 园艺

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

低镉铅污染土壤黑麦草与蒜苗套种与单种吸收重金属镉铅的比较

肖伟,唐俊杰,席江   

  1. 西南科技大学生命科学与工程学院,西南科技大学生命科学与工程学院,农业部沼气科学研究所
  • 收稿日期:2017-02-08 修回日期:2017-03-10 接受日期:2017-03-22 出版日期:2018-02-26 发布日期:2018-02-26
  • 通讯作者: 肖伟
  • 基金资助:
    校企合作技术开发项目“土壤水污染监测与修复信息中心共建”(16ZH019103)；校博士基金项目“可视化重金属（铀）污染微生物预警体系 的构建与应用”(16ZX7113)；校企合作技术开发项目“土壤污染治理与修复技术”(17ZH0015)。

Absorbing Cadmium and Lead by Perennial Ryegrass: Under Single Planting and Intercropping with Garlic

  • Received:2017-02-08 Revised:2017-03-10 Accepted:2017-03-22 Online:2018-02-26 Published:2018-02-26

摘要： 研究利用作物（低富集特性作物）促进富集植物对重金属吸收的可行性与效果，旨在为农用耕地的重金属镉铅污染修复提供一定的参考。实验选择大蒜与黑麦草进行套种，设计了黑麦草单种和与大蒜套种2种种植模式，对不同模式下黑麦草地上部分中镉铅含量进行了测定。结果表明，大蒜套种富集植物黑麦草有效地降低黑麦草对重金属镉的吸收，降低率为23.92%，但较强地提高黑麦草对重金属铅的吸收，增加率为133.15%。本实验中，黑麦草单独种植时具有最大的地上部分镉富集系数(0.75)；黑麦草套种大蒜时其具有最大的地上部分富集系数(0.54)。从研究的结果看一定的套种方式能有效地提高富集植物对某些重金属的吸收，该研究为农用耕地的重金属污染修复提供了一定的参考。

关键词: 浑善达克, 浑善达克, 沙化土地, 土地利用类型, 景观类型, 破碎度

Abstract: The feasibility and effect of low-enrichment-characteristic crops in promoting hyperaccumulators’ absorbing of heavy metals were studied in order to provide a basis for remediation of agricultural land polluted by heavy metal cadmium and lead. Single planting of perennial ryegrass and its intercropping with garlic were designed in this experiment. The lead and cadmium contents in the aerial parts of perennial ryegrass were determined in different models. Results showed that intercropping with garlic effectively reduced the cadmium absorption by perennial ryegrass, the reduction rate was 23.92% ; while it obviously increased the lead absorption by perennial ryegrass, the increasing rate was 133.15% . The biggest cadmium enrichment coefficient (0.75) of aerial parts appeared under single planting of perennial ryegrass. When intercropping with garlic, the maximum cadmium enrichment coefficient of aerial parts was 0.54. In conclusion, some certain intercropping models can effectively improve heavy metal absorption by hyperaccumulator.