| 罗绪强，陈光美，张桂玲，杨鸿雁，容文枝，李茜.茂兰喀斯特森林特有种植物叶片重金属含量特征[J].广东农业科学,2014,41(21):149-152 |
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茂兰喀斯特森林特有种植物叶片重金属含量特征 |
| Characteristics of heavy metal contents in leaves of endemic species in Maolan Karst forest |
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| DOI： |
| 中文关键词: 喀斯特森林 植物 特有种 重金属 |
| 英文关键词: Karst forest plant endemic species heavy metal |
| 基金项目:国家自然科学基金（31100187）；贵州省高层次人才科研条件特助经费项目（TZJF2010065）；贵州省优秀科技教育人才省长资金项目（黔省专合字[2012]80 号）；贵州省科学技术基金（黔科合J字[2010]2027号）；贵州省教育厅自然科学基金重点项目（黔教科20090128 号）；贵州省环境科学教学团队项目（黔教高[2012]426 号） |
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| 中文摘要: |
| 为探讨喀斯特森林植物的重金属含量状况，以茂兰喀斯特森林几种特有种植物为研究对象，分别对其叶片6种重金属元素进行了测定分析。结果表明：含量>100mg/kg的元素有Fe和Mn,10~100 mg/kg 的元素有Zn 和Pb,<10mg/kg的元素有Cd和Ni.按鲍恩和埃塞林顿的划分标准,Pb、Cd、Fe、Mn、Zn含量均已达到甚至超过植物中毒水平，植物存在着受重金属毒害的潜在风险，但除Pb外，各重金属含量均处于世界陆生维管植物元素平均含量范围内。Cd、Pb、Mn和Zn为正偏态分布，Fe和Ni为负偏态分布。不同种植物对重金属元素的吸收模式存在一定差异。植物重金属含量的最大值与最小值之比和变异系数均表现为Mn>Cd>Pb>Zn>Fe>Ni,反映了植物所处环境中这些元素的地球化学分布特征。 |
| 英文摘要: |
| To investigate the characteristics of heavy metal contents of plant in karst forest, six kinds of elements in
the leaves of endemic plants in Maolan Karst forest were measured. The results showed that the contents of Fe and Mn
were more than 100 mg/kg, Zn and Pb contents varied between 10 and 100 mg/kg, Cd and Ni contents were lower than 10
mg/kg. According to division standards of Bowen H J M and Etherington J R, the contents of Pb, Cd, Fe, Mn and Zn
reached and even more than the poisoning level of plants, plants had the potential risk of heavy metal poisoning. But
except for Pb, the heavy metal contents of all elements were within the scope of the average level of land vascular plants in the world. The elements including Cd, Pb, Mn and Zn showed positive skew distribution, while the elements including Fe
and Ni showed negative skew distribution. There were differences on the different kinds of plants absorption models of
heavy metal elements. The ratio of maximum contents and minimum contents of heavy metal and the coefficients of
variation (CV) values both showed Mn>Cd>Pb>Zn>Fe>Ni. These reflected the heavy metal geochemical distribution
characteristics of the plants in the environment. |
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