超富集植物与能源植物间作对Cd、Pb、Zn累积的影响  

Effects of intercropping on Cd,Pb,and Zn accumulation using hyperaccumulators and energy plants

作　　者：张杏锋[1,2] 吴萍 冯健飞 郭越宏 高波[3,4] ZHANG Xingfeng;WU Ping;FENG Jianfei;GUO Yuehong;GAO Bo(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 Plant and Ecological Engineering,Guilin University of Technology,Guilin 541004,China;College of Tourism&Landscape Architecture,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]桂林理工大学植物与生态工程学院,广西桂林541004 [4]桂林理工大学旅游与风景园林学院,广西桂林541004

出　　处：《农业环境科学学报》2021年第7期1481-1491,共11页Journal of Agro-Environment Science

基　　金：广西自然科学基金项目(2018GXNSFAA138045);广西科技重大专项(桂科AA17204047);广西高等学校高水平创新团队及卓越学者计划项目(桂财教函[2018]319号);国家重点研发计划项目(2016YFD0800800);广西矿冶与环境科学实验中心(KH2012ZD004)。

摘　　要：间作模式是实现重金属污染土壤边修复边生产的重要措施。通过盆栽实验,研究了超富集植物(少花龙葵、翅果菊)与能源植物(皇草、甜高粱)间作对Cd、Pb、Zn污染土壤修复的影响。结果表明,间作对土壤有机质没有显著影响,但能提高土壤中有效态Cd、Pb、Zn含量。与单作相比,间作显著增加了少花龙葵和翅果菊的生物量,而显著降低了两能源植物生物量。所有处理中,少花龙葵与皇草间作处理显著提高了皇草地上部Cd和Zn含量,翅果菊与皇草间作显著提高了两植物地上部Cd和Zn含量。此外,翅果菊与皇草间作显著增加了单株植物地上部Cd和Zn的累积。单盆中Cd和Zn累积量最大的是翅果菊与皇草间作处理(Cd为397.65μg·盆^(-1),Zn为4169.42μg·盆^(-1)),其次为少花龙葵与皇草间作;少花龙葵与皇草间作对Pb累积量最大(Pb为158.28μg·盆^(-1)),翅果菊与皇草间作对Pb累积量为98.17μg·盆^(-1)。研究表明,翅果菊与皇草间作和少花龙葵与皇草间作可以显著提高Cd、Pb、Zn污染土壤的植物修复潜力。Intercropping is an important measure for phytoremediation coupled with agro-production.In this study,hyperaccumulators(Solanum photeinocarpum and Pterocypsela indica)and energy plants(Pennisetum americanum×P.thyphoideum and Sorghum bicolor)were mutually intercropped in pots to study the effects of intercropping on the co-remediation of Cd-,Pb-,and Zn-contaminated soil.The results showed that intercropping had no significant effect on soil organic matter;however,it did increase the content of available Cd,Pb,and Zn.Compared to the respective monoculture,the dry weights of Sol.photeinocarpum and Pt.indica were significantly increased under intercropping;however,the biomasses of the two energy plants were significantly decreased.Sol.photeinocarpum intercropped with the Pe.americanum×P.thyphoideum treatment significantly increased the Cd and Zn content in the shoots of Pe.americanum×P.thyphoideum.Pt.indica intercropped with Pe.americanum×P.thyphoideum treatment significantly increased the Cd and Zn content in the shoots of the two plants.The accumulation of Cd and Zn in the shoots of the two plants was significantly increased by P.indica intercropped with Pe.americanum×P.thyphoideum.In a single pot,the maximum values of Cd and Zn accumulation were produced by Pt.indica intercropped with Pe.americanum×P.thyphoideum(397.65μg·pot^(-1) for Cd and 4169.42μg·pot^(-1) for Zn),followed by Sol.photeinocarpum intercropped with Pe.americanum×P.thyphoideum.Pb accumulation was the highest in Sol.photeinocarpum intercropped with Pe.americanum×Pe.thyphoideum(158.28μg·pot^(-1) for Pb).Pb accumulation in the intercropping of Pt.indica and Pe.americanum×P.thyphoideum was 98.17μg·pot^(-1).Therefore,Pt.indica intercropped with Pe.americanum×P.thyphoideum and Sol.photeinocarpum intercropped with Pe.americanum×Pe.thyphoideum can improve the phytoremediation efficiency of Cd-,Pb-,and Zn-contaminated soils.

关 键 词：间作 植物修复 少花龙葵 翅果菊 能源植物 重金属 

分 类 号：X53[环境科学与工程—环境工程] X173