农业环境科学学报2017，Vol.36Issue(1)：101-107,7.DOI:10.11654/jaes.2016-0920
玉米套作蜈蚣草修复砷污染农田土壤的效应研究
Effect of maize(Pteris vittata L.) intercropping on remediation of As-contaminated farmland soil
摘要
Abstract
Arsenic, as a common metalloid element in the earth′s crust, can enter the body by the food chain and does great damages to hu-man health eventually. To explore the effect of crops-hyperaccumulation plants intercropping on remediation of As-contaminated farmland ecosystem, the effect of open intercropping, restrictive intercropping and monocropping on growth, As uptake and accumulation in maize (Zea mays L.)and Pteris vittata L. were investigated in a pot experiment. The results showed that:compared with monocropping, open inter-cropping and restrictive intercropping significantly increased the shoot biomass of Pteris vittata L. by 55.7% and 43.9%, respectively, but did not exert significant effect on maize biomass. As concentration in stems, leaves and corn kernel of restrictive intercropping as well as open intercropping maize were lower than those of monoculture maize,but no significant differences of As concentration in roots occurred a-mong the three cultures. The decreased extents in As concentration of open intercropping and restrictive intercropping were 35.2% and 31.9%in stems, 21.9%and 18.6%in the leaves, and 24.2%and 12.1%in the corn kernel, respectively. Compared with monoculture, re-strictive intercropping significantly increased As concentration of Pteris vittata shoots by 11.3%, but had no obvious effect on As concentra-tion in Pteris vittata-roots, while open intercropping significantly increased As concentration of Pteris vittata in both roots by 32.4% and shoots by 17.9%, respectively. Open intercropping significantly reduced available arsenic concentration in maize and Pteris vittata rhizo-sphere soil, the decrease extents were 9.3%and 15.4%, respectively. Restrictive intercropping significantly reduced available arsenic con-centration in maize rhizosphere soil by 9.1%, but had no obvious effect on available arsenic concentration in Pteris vittata rhizosphere soil. The results suggested that Maize(Pteris vittata L.)intercropping inhibited the As accumulation in maize, while promoted the growth, As up-take and accumulation in Pteris vittata L.. The results would provide a guidance for the safe use of low to moderate levels of arsenic contami-nated farmland.关键词
套作/砷/玉米/蜈蚣草/效应Key words
intercropping/As/maize/Pteris vittata/effect分类
资源环境引用本文复制引用
邱丹,杜芮萍,孟德凯,顾明华,何冰,韦燕燕,王学礼..玉米套作蜈蚣草修复砷污染农田土壤的效应研究[J].农业环境科学学报,2017,36(1):101-107,7.基金项目
广西自然科学基金项目（2014GXNSFBA118223）；广西特聘专家工程专项经费项目（2013B015）Project supportedThe Nature Science Foundation of Guangxi Province ，China（2014GXNSFBA118223）；Guangxi Special Invited Scientist Program （）
