摘要
[目的]研究紫茎泽兰根际重金属元素的分布规律及富集能力,以便更好地利用紫茎泽兰资源。[方法]采用电感耦合等离子体质谱法(ICP-MS)、原子荧光光谱法(AFS)和石墨炉原子吸收分光光度法(GF-AAS)测定4种生境紫茎泽兰的茎、叶及其根际土中8种重金属含量。[结果]在全部紫茎泽兰的茎、叶及根际土中都检测到8种重金属元素,不同生境土壤重金属含量差异显著(P<0.05)且紫茎泽兰茎、叶中重金属含量随生境变化显著(P<0.05),其中Mn、Sr和Pb含量在茎、叶组织和根际土壤中含量均最高;富集作用表现为叶高于茎,且对不同重金属富集能力不同,叶对Cd、Mn、Hg、Sr、Ni显著(P<0.05),茎对Cd、Mn、As显著(P<0.05),茎和叶组织平均富集系数分布规律均为Cd>Mn>Ni>Sr>Hg>Pb>As≈Cr。[结论]紫茎泽兰对土中Cd、Mn、Hg、Sr、Ni、As有明显的富集作用且富集能力呈现选择性,因其适应能力强、生长速度快、生物量大,可作为某些重金属污染地区的一种修复植物,以实现入侵植物紫茎泽兰的利用价值。
[Objective]The distribution and bioaccumulation ability of heavy metals in invasive plant Eupatorium adenophorum and rhizosphere soil were studied to make better use of plant.[Method]8 kinds of heavy mentals in stems,leaves and soil from 4 habitats were measured by inductively coupled plasma mass spectrometry(ICP-MS),atomic fluorescence spectroscopy(AFS)and graphite furnace atomic absorption spectrophotometry(GF-AAS).[Result]8 heavy metals were detected in the stems,leaves and rhizosphere soil of Eupatorium adenophorum,the contents of heavy metals in different habitats were significantly different(P<0.05)and the content in the stems and leaves changed significantly with the habitats(P<0.05).The average content of Mn,Sr and Pb was the highest in the all samples.Bioaccumulation ability showed the leaf was higher than stem,and ability of different heavy metals varies with different tissues.Leaf had significant effect on Cd,Mn,Hg,Sr and Ni(P<0.05),stem on Cd,Mn and As was significant(P<0.05),and the distribution of average bioaccumulation factor of stems and leaves was Cd>Mn>Ni>Sr>Hg>Pb>As≈Cr.[Conclusion]Eupatorium adenophorum has significant bioaccumulation ability on soil heavy metals(Cd,Mn,Hg,Sr,Ni,As),and shows selective enrichment.It can be used as a repair plant in some heavy metal polluted areas and realize the utilization value of invasive plant Eupatorium adenophorum because of its strong adaptability,fast growth speed and large biomass.
作者
周启武
杨国琴
张国昌
马引娟
杨国恩
ZHOU Qi-wu;YANG Guo-qin;ZHANG Guo-chang(College of Biotechnology and Engineering,West Yunnan University,Lincang,Yunnan 677000;Mengding Customs Integrated Technology Center,Lincang,Yunnan 677000)
出处
《安徽农业科学》
CAS
2020年第24期87-90,93,共5页
Journal of Anhui Agricultural Sciences
基金
云南省教育厅项目(2016ZZX238)。
关键词
紫茎泽兰
根际土壤
重金属元素
富集作用
植物修复
Eupatorium adenophorum
Rhizosphere soil
Heavy metal
Bioaccumulation ability
Phytoremediation
