单种与蒜苗套种下黑麦草吸收重金属镉铅的比较  

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

作　　者：肖伟[1,2] 唐俊杰[1] 席江[3] Xiao Wei1,2, Tang Junjie1, Xi Jiang3(1College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang Sichuan 621010; 2Fundamental Science on Nuclear Wasters and Environment Safety Laboratory, Southwest University of Scieuce and Technology, Mianyang Sichuan 621010; 3Biogas Institute of Ministry of Agriculture, Chengdu 61004)

机构地区：[1]西南科技大学生命科学与工程学院,四川绵阳621010 [2]西南科技大学核废物与环境安全国防重点学科实验室,四川绵阳621010 [3]农业部沼气科学研究所,成都610041

出　　处：《中国农学通报》2018年第5期74-77,共4页Chinese Agricultural Science Bulletin

基　　金：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);校企合作技术开发项目"土壤污染治理与修复技术"(17ZH0015);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)

摘　　要：研究利用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。实验设计了黑麦草单种与大蒜套种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,与大蒜套种模式有效地降低了黑麦草对重金属镉的吸收,降低率为23.92%,但显著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,其最大的地上部分镉富集系数为0.54。由此可知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。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.

关 键 词：镉铅污染 植物修复 大蒜 黑麦草 套种 

分 类 号：X53[环境科学与工程—环境工程]