香根草对Cd、Pb、Zn的吸收累积特征研究
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摘要
采用盆栽试验方法,分析Cd、Pb和Zn复合污染对香根草生长的影响,研究香根草对Cd、Pb和Zn的吸收累积特征。结果表明:(1)对照和处理香根草株高分别为92.5和72.8cm,重金属处理使香根草株高下降了21.3%,但差异不显著;(2)对照和处理香根草地上部生物量分别为4.1g/株和3.3g/株,根部生物量分别为3g/株和3.2g/株,重金属处理香根草地上部生物量下降了26.8%,根部生物量增加了6.7%,差异均不显著;(3)对照和施加重金属香根草地上部处理地上部Cd含量分别为0.11mg/kg和20.83mg/kg、Pb含量分别为15.67mg/kg和341.5mg/kg、Zn含量分别为11.38mg/kg和756.17mg/kg,根部Cd含量分别为0.21mg/kg和21.5mg/kg、Pb含量分别为19.4mg/kg和414.83mg/kg、Zn含量分别为13.12mg/kg和818.67mg/kg,表明香根草对重金属有较强的吸收能力和耐受能力。
Pot experiments were conducted to study the effects of Cd,Pb and Zn combined pollution on the growth of Vetiver grass,and the characteristics of absorption and accumulation of Cd,Pb and Zn byVetiveria zizanioide. The results showed that:(1)The plant height of control and treatment was 92.5 cm/plant and 72.8 cm/plant,respectively.Heavy metal treatment reduced the plant height by 21.3%,but the difference was not significant.(2)The plant of control and treatment was 4.1 g/plant and 3.3 g/plant respectively,while the root biomass was 3 g/plant and 3.2 g/plant respectively. The upper biomass of the plant treated with heavy metals decreased by 26.8%,while the root biomass increased by 6.7%,but the difference was not significant.(3)The contents of Cd,Pb,Zn,Cd,Pb and Zn were0.11 mg/kg and 20.83 mg/kg,15.67 mg/kg and 341.5 mg/kg,11.38 mg/kg and 756.17 mg/kg,respectively. The contents of Cd,Pb and Zn in roots were 0.21 mg/kg and 21.5 mg/kg,19.4 mg/kg and 414.83 mg/kg,respectively. 12 mg/kg and 818.67 mg/kg. This indicated that had strong absorption and tolerance to heavy metals.
Pot experiments were conducted to study the effects of Cd,Pb and Zn combined pollution on the growth of Vetiver grass,and the characteristics of absorption and accumulation of Cd,Pb and Zn byVetiveria zizanioide. The results showed that:(1)The plant height of control and treatment was 92.5 cm/plant and 72.8 cm/plant,respectively.Heavy metal treatment reduced the plant height by 21.3%,but the difference was not significant.(2)The plant of control and treatment was 4.1 g/plant and 3.3 g/plant respectively,while the root biomass was 3 g/plant and 3.2 g/plant respectively. The upper biomass of the plant treated with heavy metals decreased by 26.8%,while the root biomass increased by 6.7%,but the difference was not significant.(3)The contents of Cd,Pb,Zn,Cd,Pb and Zn were0.11 mg/kg and 20.83 mg/kg,15.67 mg/kg and 341.5 mg/kg,11.38 mg/kg and 756.17 mg/kg,respectively. The contents of Cd,Pb and Zn in roots were 0.21 mg/kg and 21.5 mg/kg,19.4 mg/kg and 414.83 mg/kg,respectively. 12 mg/kg and 818.67 mg/kg. This indicated that had strong absorption and tolerance to heavy metals.
引文
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[8]田胜尼,刘登义,彭少麟,等.香根草和鹅观草对Cu、Pb、Zn及其复合重金属的耐性研究[J].生物学杂志,2004(03):15-19+26.
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[10]孙庆业,蓝崇钰,黄铭洪,等.铅锌尾矿上自然定居植物[J].生态学报,2001(09):1457-1462.
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[12]龙健,黄昌勇,滕应,等.天台铅锌矿区香根草(Vetiveria zizanioides)等几种草本植物的重金属耐性[J].应用与环境生物学报,2003(03):226-229.
[13]韦朝阳,陈同斌.重金属超富集植物及植物修复技术研究进展[J].生态学报,2001(07):1196-1203.
[2]宋榕洁,唐艳葵,陈玲,等.超富集植物对镉、砷的累积特性及耐性机制研究进展[J].江苏农业科学,2015,43(06):6-10.
[3]吴大付,任秀娟,朱东海,等.植物对重金属污染环境的适应性研究进展[J].河南科技学院学报(自然科学版),2015,43(01):25-29.
[4]洒威,畅喜云,席嘉宾,等.我国香根草种质资源研究与应用现状及展望[J].草业与畜牧,2009(04):25-29.
[5]夏汉平,敖惠修,刘世忠.香根草生态工程——实现可持续发展的生物技术.生态学杂志,1998,17(6):265~270.
[6]黄东兵,彭莉霞,石茗馨.香根草生态工程在垃圾填埋场复绿中的研究与应用[J].农技服务,2017,34(10):6-7.
[7]夏汉平,敖惠修,刘世忠.香根草生态工程──实现可持续发展的生物技术[J].生态学杂志,1998(06):45-51.
[8]田胜尼,刘登义,彭少麟,等.香根草和鹅观草对Cu、Pb、Zn及其复合重金属的耐性研究[J].生物学杂志,2004(03):15-19+26.
[9]聂亚平,王晓维,万进荣,等.几种重金属(Pb、Zn、Cd、Cu)的超富集植物种类及增强植物修复措施研究进展[J].生态科学,2016,35(02):174-182.
[10]孙庆业,蓝崇钰,黄铭洪,等.铅锌尾矿上自然定居植物[J].生态学报,2001(09):1457-1462.
[11]夏汉平,束文圣.香根草和百喜草对铅锌尾矿重金属的抗性与吸收差异研究[J].生态学报,2001(07):1121-1129.
[12]龙健,黄昌勇,滕应,等.天台铅锌矿区香根草(Vetiveria zizanioides)等几种草本植物的重金属耐性[J].应用与环境生物学报,2003(03):226-229.
[13]韦朝阳,陈同斌.重金属超富集植物及植物修复技术研究进展[J].生态学报,2001(07):1196-1203.