黔产薄荷不同营养器官中重金属含量分布及富集特征  

Distribution and Accumulation Characteristics of Heavy Metals in Different Organs of Mentha haplocalyx in Guizhou

作　　者：田林锋[1] 胡继伟[1] 秦樊鑫[1] 黄先飞[1] 刘峰[1] 章吉萍[1] 

机构地区：[1]贵州师范大学贵州省山地环境信息系统与生态环境保护重点实验室,贵州贵阳550001

出　　处：《安徽农业科学》2010年第17期8957-8959,共3页Journal of Anhui Agricultural Sciences

基　　金：贵州省高级人才特助经费项目(TZJF-2006-27);贵州省教育厅自然科学研究重点项目(2005106);贵州省科技厅对外合作项目[(2007)400126]

摘　　要：[目的]研究5种常见重金属(Pb、Cd、As、Hg和Cu)在黔产薄荷(Mentha haplocalyx)不同营养器官中的分布特征,探讨影响中药材重金属含量的因素,为薄荷入药器官的选择提供有价值的信息。[方法]原子吸收光谱法和原子荧光光谱法。[结果]As、Hg、Pb在黔产薄荷中表现出的规律为叶>根>茎,Cu在黔产薄荷中表现出的规律为根>叶>茎,而Cd在黔薄荷中表现出的规律为根>茎>叶。黔薄荷叶中Cu和Pb的相关系数r=-0.952(P<0.05);药材GAP基地土壤中As和Pb的相关系数r=0.987(P<0.05)。[结论]薄荷不同器官中5种重金属的含量存在一些明显的差异,其中叶中的含量相对于其他器官较低,且重金属的含量在限定范围内,为入药首选;营养器官中重金属含量与其生长土壤中的重金属总量相关性不大。[Objective]The aim was to study distribution and accumulation characteristics of five heavy metals（Pb,Cd,Hg,As and Cu） in different organs of Mentha haplocalyx,and discuss factors affecting heavy metals in this herb,which will provide some valuable information for selection of certain organs of Mentha haplocalyx for medical uses.[Method] Atomic absorption spectrometer and atomic fluorescence spectrometer were adopted to determine the concentrations of heavy metals.[Results] Concentrations of As,Hg and Pb in the plant organs showed the following order：leaf root stem,the order of concentration for Cu was：root leaf stem,while the order of the concentration for Cd was：root stem leaf.There were some negative correlations between Cu and Pb in Mentha haplocalyx leaves（r=-0.952,p0.05）.The concentrations of Pb and Cu in soils of GAP base showed a negative correlation（r=-0.954,P0.05）.As and Cu in these GAP soils also exhibited a strong negative correlation（r=-0.990,P0.05）,while As and Pb in the soil demonstrated a strong positive correlation（r=0.987,P0.05）.[Conclusion] There were some obvious differences in concentrations of heavy metals from different organs of Mentha haplocalyx,and there were no significant correlations between the concentrations of heavy metals in the GAP soil and those in the organs of Mentha haplocalyx.

关 键 词：黔产薄荷 重金属 相关性 富集特征 

分 类 号：S567.235[农业科学—中草药栽培]