根际
植物修复
环境修复
生物量(生态学)
农学
环境科学
植物提取工艺
土壤污染
土壤水分
生物
生态学
超量积累植物
污染
遗传学
细菌
作者
Bei Wu,Shihua Luo,Huanyan Luo,He Huang,Fei Xu,Feng Su,Heng Xu
标识
DOI:10.1016/j.scitotenv.2021.151995
摘要
Miscanthus floridulus is a plant with high biomass and heavy metal tolerance, which is a good candidate for phytoremediation. It is essential to explore how to improve its remediation ability, especially the rhizosphere ecological characteristics which are significant for phytoremediation efficiency. Therefore, the heavy metals accumulation of M. floridulus, rhizosphere soil physicochemical properties, enzyme activities, and bacterial community of different distances from the tailing were measured, focusing on the relationship between phytoremediation ability and rhizosphere ecological characteristics. The results show that the stronger the phytoremediation ability is, the better is the soil environment, and the higher the coverage with plants. Soil rhizosphere environment and the phytoremediation ability are shaped by heavy metals. Rhizosphere microecology may regulate phytoremediation by improving soil nutrients and enzyme activities, alleviating heavy metal toxicity, changing rhizosphere microbial community structure, increasing beneficial microbial abundance, promoting heavy metals accumulation by plants. This study not only clarified the relationship between rhizosphere ecological factors, but also elucidated the phytoremediation regulatory mechanism. Some of microbial taxa might developed as biological bioinoculants, providing the possibility to promote the growth of plants with ecological restoration ability and improve the phytoremediation efficiency.
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