水分管理对土壤温室气体排放和植物修复影响  

Effects of Water Management on Greenhouse Gas Emissions and Phytoremediation

作　　者：何川黔 张杏锋[1,2] 高波 陈敏妮[1,2] 虞乾魁 陈虹旭 胡茂盛 HE Chuanqian;ZHANG Xingfeng;GAO Bo;CHEN Minni;YU Qiankui;CHEN Hongxu;HU Maosheng(Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technology,Guilin 541004,China;Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin University of Technology,Guilin 541004,China;College of Tourism and Landscape Architecture,Guilin University of Technology,Guilin 541004,China;College of Plant and Ecological Engineering,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学广西环境污染控制理论与技术重点实验室,广西桂林541004 [2]桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004 [3]桂林理工大学旅游与风景园林学院,广西桂林541004 [4]桂林理工大学植物与生态工程学院,广西桂林541004

出　　处：《环境科学与技术》2024年第2期125-136,共12页Environmental Science & Technology

基　　金：国家自然科学基金项目(42107025);广西矿冶与环境科学实验中心项目(KH2012ZD004);广西旅游产业研究院专项基金项目(LYCY2023-12);广西新农科研究与实践项目(桂教高教[2022]47号:XNK2022006)。

摘　　要：水分管理对土壤温室气体排放和重金属污染土壤植物修复具有重要影响。该研究以超富集植物翅果菊(Pterocypsela indica)为研究对象,探究55%田间持水量(55%WHC)和75%田间持水量(75%WHC)对土壤温室气体排放和植物修复的影响。研究发现:相较于55%WHC处理,75%WHC处理显著增加了翅果菊抗逆性,同时75%WHC处理下翅果菊地上部Pb含量和累积量分别提高了92.3%和91.0%。与55%WHC处理相比,75%WHC处理降低了温室气体累积排放量,在种植与不种植翅果菊2种情况中,土壤CO_(2)累积排放量分别降低了18.8%和10.0%,N_(2)O累积排放量分别降低了9.1%和47.0%,CH_(4)累积排放量分别降低了17.1%和43.7%。综上,相较于55%WHC,75%WHC处理能够促进翅果菊生长和重金属累积,减少温室气体排放量,更适用于植物复修复。Water management plays an important role in soil greenhouse gas emission and phytoremediation of soil contaminat⁃ed by heavy metals.In this study,the hyperenriched plant Pterocypsela indica was selected as the research object to investigate the effects of 55%water holding capacity(55%WHC)and 75%water holding capacity(75%WHC)on soil greenhouse gas emis⁃sions and phytoremediation.The results showed that compared with 55%WHC treatment,75%WHC treatment significantly increased the stress resistance of P.indica,and 75%WHC treatment increased the aboveground Pb content and accumulation of P.indica by 92.3%and 91.0%,respectively.Compared with 55%WHC treatment,75%WHC treatment reduced cumulative green⁃house gas emissions,and soil CO_(2) cumulative emissions were reduced by 18.8%and 10.0%,and N_(2)O cumulative emissions were reduced by 9.1%and 47.0%,respectively,under the two conditions of planting and no planting of P.indica.Cumulative CH_(4) emis⁃sions were reduced by 17.1%and 43.7%,respectively.In conclusion,compared with 55%WHC,75%WHC treatment can promote the growth and accumulation of heavy metals,reduce greenhouse gas emissions,and is more suitable for phytoremediation.

关 键 词：温室气体 重金属 土壤 水分管理 植物修复 

分 类 号：X53[环境科学与工程—环境工程]