首页  |  本刊简介  |  编委会  |  投稿须知  |  订阅指南  |  联系我们  |  微信  |  出版道德声明  |  Ei收录本刊数据
芦竹和木本植物间种修复重金属污染土壤
摘要点击 143  全文点击 58  投稿时间:2018-04-17  修订日期:2018-04-26
查看HTML全文 查看全文  查看/发表评论  下载PDF阅读器
中文关键词  重金属污染土壤  芦竹  构树  桑树  间种
英文关键词  heavy metals contaminated soil  Arundo donax  Broussonetia papyrifera  Morus alba  intercropping
作者单位E-mail
曾鹏 中南大学冶金与环境学院环境工程研究所, 长沙 410083 zengzengpp@foxmail.com 
郭朝晖 中南大学冶金与环境学院环境工程研究所, 长沙 410083 zhguo@csu.edu.cn 
肖细元 中南大学冶金与环境学院环境工程研究所, 长沙 410083  
彭驰 中南大学冶金与环境学院环境工程研究所, 长沙 410083  
黄博 中南大学冶金与环境学院环境工程研究所, 长沙 410083  
中文摘要
      通过温室盆栽实验,研究草本植物芦竹与木本植物构树、桑树间种修复重金属污染土壤的潜力.结果表明,重金属污染土壤上芦竹与构树、桑树间种有利于植物的生长,提高植物对污染土壤中重金属的富集能力,并有效改善土壤酶活性.重金属污染土壤上单种芦竹、构树和桑树的叶片光合色素含量随着修复时间的延长呈下降趋势,而芦竹与构树、桑树间种修复270 d后,构树叶片叶绿素a和类胡萝卜素含量,桑树叶片叶绿素b和类胡萝卜素含量均与修复初期(90 d)相比显著差异;桑树叶片叶绿素a、叶绿素b以及类胡萝卜素含量较单种桑树分别显著(P<0.05)提高99.1%、177.1%和119.9%,且整株生物量显著(P<0.05)提高26.1%.芦竹-构树间种下植物地上部分Pb和Zn总量较单种芦竹分别显著(P<0.05)提高171%和124%;芦竹-桑树间种下植物地上部分As和Pb总量较单种桑树和芦竹修复分别显著(P<0.05)提高150%和76.5%.芦竹与构树、桑树间种修复270 d后,污染土壤中As、Cd、Pb和Zn的赋存形态明显变化,而且土壤脲酶、酸性磷酸酶和总磷酸酶活性明显优于部分单一植物修复.上述结果表明,芦竹与构树、桑树间种可有效用于重金属污染土壤修复,还可改善污染土壤的环境质量.
英文摘要
      A greenhouse experiment was conducted to study the potential of intercropping Arundo donax with Broussonetia papyrifera or Morus alba to remediate heavy metal-contaminated soil. The results showed that intercropping the herbaceous plant A. donax with woody plants B. papyrifera or M. alba was beneficial for plant growth on heavy metal-contaminated soil. This can effectively enhance the comprehensive enrichment capacity of heavy metals and improve soil enzyme activities. The photosynthetic pigment contents in the leaves of A. donax, B. papyrifera, and M. alba decreased along with remediation time under monoculture treatment for each plant. However, compared with 90 d cultivation, the chlorophyll-a and carotenoid contents in B. papyrifera leaves and chlorophyll-b and carotenoid contents in M. alba leaves under intercropping treatment after 270 d cultivation were only slightly changed. Furthermore, chlorophyll-a, chlorophyll-b, and carotenoid contents in M. alba leaves under intercropping treatment were significantly (P<0.05) increased by 99.1%, 177.1%, and 119.9%, respectively, compared with monoculture-treated M. alba, and the total biomass of M. alba increased significantly (P<0.05) by 26.1%. Compared with monoculture-treated A. donax, the total accumulation amounts of Pb and Zn in the shoots of combined plants was significantly (P<0.05) enhanced by 171% and 124% under intercropping treatment of A. donax with B. papyrifera. Compared with monoculture-treated M. alba and A. donax, the total accumulation amounts of As and Pb in the shoots of intercropped plants were significantly (P<0.05) enhanced by 150% and 76.5%, respectively, under intercropping treatment of A. donax with M. alba. Moreover, the fractions of As, Cd, Pb, and Zn in contaminated soil slightly changed under intercropping treatment of A. donax with B. papyrifera or M. alba, and soil urease, acid phosphatase, and total phosphatase activity was superior to part of the monoculture treatments after 270 d cultivation. The results further suggested that intercropping A. donax with B. papyrifera or M. alba could be effectively used for heavy metal-contaminated soil remediation, while simultaneously improving the biological quality in contaminated soil.

您是第13689270位访客
主办单位:中国科学院生态环境研究中心 单位地址:北京市海淀区双清路18号
电话:010-62941102,62849343 传真:010-62849343 邮编:100085 E-mail: hjkx@rcees.ac.cn
本系统由北京勤云科技发展有限公司设计  京ICP备05002858号