盐生植物碱蓬修复镉污染盐土的研究

doi:10.11686/cyxb20140221

草业学报 ›› 2014, Vol. 23 ›› Issue (2): 171-179.DOI: 10.11686/cyxb20140221

盐生植物碱蓬修复镉污染盐土的研究

陈雷¹,杨亚洲¹,郑青松¹,张春银²,王爽¹,许彩云¹,葛滢^1*

1.南京农业大学资源与环境科学学院江苏省海洋生物学重点实验室,江苏南京 210095;
2.江苏省盐城绿苑海蓬子有限公司,江苏盐城224002

收稿日期:2013-04-10 出版日期:2014-02-25 发布日期:2014-04-20
通讯作者: E-mail:yingge711@njau.edu.cn
作者简介:陈雷(1987-),男,江苏沭阳人,在读硕士。E-mail:2010103078@njau.edu.cn
基金资助:
江苏省农业科技自主创新项目(CX[12]1005-04)和南京农业大学本科生SRT项目(1313A10)资助。

Phytoremediation of Cd polluted saline soils by the halophyte Suaeda salsa

CHEN Lei¹, YANG Ya-zhou¹, ZHENG Qing-song¹, ZHANG Chun-yin², WANG Shuang¹, XU Cai-yun¹, GE Ying¹

1.College of Natural Resources and Environmental Science, Key Laboratory of Marine Biology, Nanjing Agricultural University, Nanjing 210095, China;
2.Yancheng Green Garden Samphire Development Co., Ltd., Yancheng 224002, China

Received:2013-04-10 Online:2014-02-25 Published:2014-04-20

摘要/Abstract

摘要： 通过温室盆栽试验研究了不同盐(NaCl)浓度(0.1%,0.5%,1.0%)和镉(Cd)浓度(0,1.0,2.5,5.0 mg/kg)处理下碱蓬的生长及其对Na和Cd的富集。结果表明,在含0.5%和1.0% NaCl的土壤中,随着Cd处理浓度的增加,碱蓬的生长显著地受到抑制,生物量均呈减少趋势;随NaCl处理浓度的增加,碱蓬对Cd的积累也随之增加,在0.1% NaCl和2.5 mg/kg Cd的处理土壤中,碱蓬各部位的Cd累计含量达到最大值,叶为30.9 mg/kg,茎为30.1 mg/kg,根为35.3 mg/kg。碱蓬地上部的Cd富集系数为0.9～19.9,地上部吸收的Cd累积量是根部的8.1～73.6倍。NaCl和Cd处理对碱蓬鲜重和根部Cd、Na含量有显著的交互作用,对茎叶部Cd、Na含量的交互作用不显著。在加Cd处理的碱蓬叶和茎部位的Na 含量随NaCl处理浓度的增加而增大,但相同NaCl浓度处理下,Cd处理下的叶茎部Na含量与对照相比差异不显著,且NaCl处理增强了碱蓬对Cd的累积。碱蓬在Cd胁迫下仍保持盐生植物的特性,且对 Cd 具有一定的耐性和较强的累积能力,因此碱蓬存在一定的修复Cd污染盐土的潜力。

Abstract: A pot experiment was conducted to investigate the growth responses to Cd and Na accumulation by Suaeda salsa under treatments of Cd (0-5.0 mg/kg) and NaCl (0.1%-1.0%). In soils containing 0.5% or 1.0% NaCl, the growth of S. salsa was significantly inhibited. Plant biomass decreased with an increase of soil Cd, while Cd accumulation increased with an increase of NaCl content. In the roots, stems and leaves of S. salsa, the highest Cd concentrations were (35.3, 30.1 and 30.9 mg/kg, respectively) in the 0.1% NaCl and 2.5 mg/kg Cd treatments. The bio-concentration factors of Cd in the shoots were 0.9-19.9, and the Cd accumulation in shoots was 8.1-73.6 times that of the roots. Fresh weight, Cd and Na concentrations in the roots of S. salsa were significantly affected by NaCl and Cd interaction, however the interaction was not significant for the Cd and Na concentrations in the stems and leaves. In the presence of Cd, Na contents in the stems and leaves increased as the NaCl content increased, but with the same Na addition, Cd did not lead to significantly different Na contents compared with the control. On the contrary, NaCl enhanced the accumulation of Cd in S. salsa. Sodium accumulation of S. salsa was only affected by the NaCl treatments. These results showed that S. salsa was Cd-tolerant and may strongly accumulate Cd, making it suitable for the phytoremediation of Cd-contaminated saline soils.

中图分类号:

陈雷,杨亚洲,郑青松,张春银,王爽,许彩云,葛滢. 盐生植物碱蓬修复镉污染盐土的研究[J]. 草业学报, 2014, 23(2): 171-179.

CHEN Lei, YANG Ya-zhou, ZHENG Qing-song, ZHANG Chun-yin, WANG Shuang, XU Cai-yun, GE Ying. Phytoremediation of Cd polluted saline soils by the halophyte Suaeda salsa[J]. Acta Prataculturae Sinica, 2014, 23(2): 171-179.

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盐生植物碱蓬修复镉污染盐土的研究

Phytoremediation of Cd polluted saline soils by the halophyte Suaeda salsa

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