| Pb胁迫对藿香蓟（Ageratum conyzoides）营养积累与分配的影响 |
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| 引用本文： | 刘碧英,潘远智,赵杨迪,蔡蕾,侯艳,杨慧,张建芳.Pb胁迫对藿香蓟（Ageratum conyzoides）营养积累与分配的影响[J].农业环境保护,2011(3):435-442. |
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| 作者姓名： | 刘碧英 潘远智 赵杨迪 蔡蕾 侯艳 杨慧 张建芳 |
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| 作者单位： | 四川农业大学风景园林学院,成都611130 |
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| 基金项目： | 四川省重点公益性项目（2007NGY006）; 四川省学术带头人培养基金（2007—2010） |
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| 摘 要： | 为了解Pb胁迫对地被植物藿香蓟（Ageratum conyzoides）生长特性的影响,采用盆栽控制试验,研究了不同Pb浓度（0、250、500、750、1000、1250、1500mg·kg-1）胁迫处理下霍香蓟植株生物生产量、生物量分配格局及N、P、K、Mg积累和分配特征。结果表明,低浓度Pb胁迫处理明显增加了藿香蓟的生物量、根茎叶中N、P、K、Mg含量及养分积累,改变了养分在植物体内的分配格局,但高浓度Pb胁迫处理明显抑制了植物生长,降低了根茎叶中P、K的含量和积累量。这说明藿香蓟能在一定程度上适应Pb污染土壤环境,可用于轻度Pb污染区域的园林绿化。
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| 关 键 词： | 藿香蓟 铅胁迫 植物营养 |
Effects of Pb Stress on Nutrient Accumulation and Allocation of Ageratum conyzoides |
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| LIU Bi-ying,PAN Yuan-zhi,ZHAO Yang-di,CAI Lei,HOU Yan,YANG Hui,ZHANG Jian-fang.Effects of Pb Stress on Nutrient Accumulation and Allocation of Ageratum conyzoides[J].Agro-Environmental Protection,2011(3):435-442. |
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| Authors: | LIU Bi-ying PAN Yuan-zhi ZHAO Yang-di CAI Lei HOU Yan YANG Hui ZHANG Jian-fang |
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| Institution: | (Landscape Architecture,Sichuan Agricultural University,Chengdu 611130,China) |
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| Abstract: | As a regional and global environmental issue,increasingly soil Pb pollution is threatening the health and survival of human beings,as well as urban plant growth and reproduction.As yet little information has been available on the effect of soil Pb pollution on urban cover plant nutrition.Ageratum conyzoides is a cover plant,which is widely used in urban landscape construction.In order to understand the effect of lead（Pb） stress on the growth and nutrition of A.conyzoides,therefore,a pot experiment was conduct to investigate the biomass allocation,and accumulation and allocation of nitrogen（N）,phosphorus（P）,potassium（K） and magnesium（Mg） of A.conyzoides under different soil Pb concentration treatments（0,250,500,750,1 000,1 250,and 1 500 mg·kg-1 dry soil）.The results indicated that lower concentrations of soil Pb stress increased the plant biomass,and the concentrations and accumulations of N,P,K and Mg in root,stem and leaves of A.conyzoides,and changed the nutrient allocation pattern in plant tissues.However,higher concentrations of soil Pb stress inhibited the growth,and the concentrations and accumulations of P and K in root,stem and leaves of A.conyzoides.These results implied that A.conyzoides could adapt the Pb-contaminated soil environment to a certain extent,and could be used to urban landscaping in the slight Pb-contaminated area. |
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| Keywords: | A conyzoides Pb stress plant nutrition |
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