小花南芥与玉米间作对Pb的吸收累积特征

发布时间：2018-02-03 13:16

本文关键词： 小花南芥玉米 Pb 间作植物修复　出处：《环境科学与技术》2016年11期 　论文类型：期刊论文

【摘要】：该研究选择Pb的超富集植物小花南芥(Arabis alpina L.)与玉米,在Pb污染土壤中进行单作、间作试验,研究小花南芥和玉米在不同种植方式下对Pb的吸收和累积特性。结果表明,小花南芥与玉米间作,显著提高了玉米的生物量,降低了小花南芥的生物量;间作提高了小花南芥根和地上部分Pb含量,由单作的762.11 mg/kg、842.10 mg/kg分别增至834.95、923.15 mg/kg,降低玉米根和地上部分Pb含量,由单作的145.80 mg/kg、90.49 mg/kg分别降低到121.42、73.55 mg/kg。与小花南芥单作相比,间作降低了土壤Pb含量。同时,因为小花南芥的作用,活化了土壤Pb,玉米与小花南芥间作土壤有效态Pb含量显著高于玉米单作土壤,更有利于提高Pb污染土壤的修复效率。
[Abstract]:In this study, the Pb super-enriched plant Arabis alpina L.) and maize were selected for monoculture and intercropping in Pb contaminated soil. The characteristics of Pb uptake and accumulation in different planting methods were studied. The results showed that the biomass of maize was significantly increased and the biomass of Arabidopsis was decreased by intercropping. Intercropping increased Pb content in roots and aboveground parts from 762.11 mg / kg to 834.95 mg/kg, respectively. At 923.15 mg / kg, Pb content in roots and aboveground parts of maize decreased from 145.80 mg / kg / kg to 121.42 mg/kg, respectively. 73.55 mg / kg. The intercropping decreased the content of Pb in soil, and activated the Pb in soil because of the effect of the small floret thaliana. The content of available Pb in maize intercropping soil was significantly higher than that in maize monoculture soil, which was beneficial to improve the remediation efficiency of Pb contaminated soil.
【作者单位】：云南农业大学资源与环境学院;
【基金】：NFSC-云南联合基金项目(U1202236)
【分类号】：X53;X173
【正文快照】： 《环境科学与技术》编辑部:(网址)http://fjks.chinajournal.net.cn(电话)027-87643502(电子信箱)hjkxyjs@vip.126.com土壤是生态系统重要组成部分,是人类赖以生存的重要自然资源之一。大量的Cd、Pb等重金属通过污水灌溉、矿山开采、污泥农用等途径进入土壤,既危害土壤生态系

【相似文献】