CAJ | 학술논문

外来植物紫茎泽兰(Eupatorium adenophorum)入侵我国西南地区并造成了严重的生态灾难，通过研究Pb、Cd及其复合污染对紫茎泽兰生长及吸收富集特征的影响，有助于从生态学角度为紫茎泽兰的综合防控提供依据。采用模拟Pb、Cd污染土壤培养法研究了不同浓度Pb、Cd及其复合污染作用下紫茎泽兰的生长响应及重金属吸收、富集和迁移特征变化。结果表明：低浓度的 Pb、Cd 对紫茎泽兰的生长有促进作用，高浓度则表现出一定的抑制作用，生物量，株高，根长均明显减少。紫茎泽兰体内Pb、Cd吸收量与污染土壤具有良好的相关性，随处理浓度增加明显增大，极端浓度Pb、Cd胁迫下紫茎泽兰各器官Pb、Cd积累量与对照相比显著增加，1000 mg·kg-1处理时紫茎泽兰根、茎、叶的Pb质量分数均分别高达603.69、568.31、598.85 mg·kg-1；100 mg·kg-1Cd处理时其根、茎、叶的Pb、Cd累积量依次为165.21、93.59、152.79 mg·kg-1。说明紫茎泽兰对Pb、Cd具有较好吸收累积及转运能力，可作为重金属污染地区的一种理想的修复植物。
외래식물자경택란(Eupatorium adenophorum)입침아국서남지구병조성료엄중적생태재난，통과연구Pb、Cd급기복합오염대자경택란생장급흡수부집특정적영향，유조우종생태학각도위자경택란적종합방공제공의거。채용모의Pb、Cd오염토양배양법연구료불동농도Pb、Cd급기복합오염작용하자경택란적생장향응급중금속흡수、부집화천이특정변화。결과표명：저농도적 Pb、Cd 대자경택란적생장유촉진작용，고농도칙표현출일정적억제작용，생물량，주고，근장균명현감소。자경택란체내Pb、Cd흡수량여오염토양구유량호적상관성，수처리농도증가명현증대，겁단농도Pb、Cd협박하자경택란각기관Pb、Cd적루량여대조상비현저증가，1000 mg·kg-1처리시자경택란근、경、협적Pb질량분수균분별고체603.69、568.31、598.85 mg·kg-1；100 mg·kg-1Cd처리시기근、경、협적Pb、Cd루적량의차위165.21、93.59、152.79 mg·kg-1。설명자경택란대Pb、Cd구유교호흡수루적급전운능력，가작위중금속오염지구적일충이상적수복식물。
E. adenophorum Spreng is one of the worst invasive alien plants into China. It brings great harm to the ecological environment in the Southwest of China. A controlled pot-experiment cultivated withE. adenophorum was arranged with different treatments of lead and cadmium concentrations in field. Growth and absorption enrichment responses ofE. adenophorum Spreng to lead, cadmium and their combined stress were evaluated in order to provide integrate strategies ofE. adenophorum. A pot experiment was study to observe the growth responses, accumulation and transfer characteristics ofE. adenophorum in different concentrations of lead, cadmium. Results showed that there was a positive effect on the growth of E. adenophorum under low concentrations for both lead and cadmium but negative effect in high concentration, with the decreasing biomass,shorter plant height and root length. Lead and cadmium. Absorption content of E. adenophorum had a favorable correlation with contaminated soil, which increased significantly with the conbined treatment concentrations raising. lead and cadmium concentration of the roots, stems and leaves ofE. adenophorum was much higher in corresponding treatments. The lead content of roots, stems and leaves ofE. adenophorum were 603.69, 568.31 and 598.85 mg·kg-1, respectively, when the plants were treated with 1000 mg·kg-1 lead in soil. The cadmium contents in the roots, stems and leaves were 165.21, 93.59 and 152.79 mg·kg-1, respectively, under the 100 mg·kg-1 cadmium stress.E. adenophorum has good capacity of absorption, accumulation and transfer under heavy metals stress of lead and cadmium and it can, therefore, be used as ideal plant to repair composite pollution soil of heavy metals.