芦苇
根际
磷
镉
化学
营养物
农学
环境修复
环境化学
土壤污染
污染
生物
生态学
湿地
细菌
有机化学
遗传学
作者
Shuang-Qiang Li,Gen-dong Li,Kaiming Peng,Liheng Yang,Xiangfeng Huang,Lijun Lu,Jia Liu
出处
期刊:Chemosphere
[Elsevier]
日期:2022-01-12
卷期号:293: 133613-133613
被引量:8
标识
DOI:10.1016/j.chemosphere.2022.133613
摘要
To promote the colonization of Phragmites in Cd polluted, nutrient deprived and structural damaged soil, the combined remediation using chemical and microbial modifiers were carried out in potting experiments. The co-application of Diversispora versiformis and sodium bentonite significantly improved the soil structure and phosphorus utilization of the plant, while decreasing the content of cadmium bound by diethylenetriaminepentaacetic acid by 77.72%. As a result, the Phragmites height, tillers, and photosynthetic capacity were increased by 71.60%, 38.37%, and 17.54%, respectively. Further analysis suggested the co-application increased the abundance of phosphorus-releasing microbial communities like Pseudomonassp. and Gemmatimonadetes. Results of rhizosphere metabolites also proved that the signal molecule of lysophosphatidylcholine regulated the phosphorus fixation and utilization by the plant. This work finds composite modifiers are effective in the colonization of Phragmites in Cd contaminated soil by decreasing the bioavailable Cd, increasing the abundance of functional microbial communities and regulating the phosphorus fixation.
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