摘要
为探讨自然保护区森林生态系统植物重金属含量状况,以雷公山自然保护区主峰地段常见植物为研究对象,对其叶片6种重金属元素(Fe、Mn、Zn、Ni、Pb、Cd)进行了测定。结果表明:重金属含量>100mg·kg^(-1)的元素有Fe和Mn,50~100mg·kg^(-1)的元素有Zn,<50mg·kg^(-1)的元素有Pb、Ni和Cd。Fe、Zn、Ni、Cd、Pb为正偏态分布,Mn为负偏态。除Ni外,其余元素在5种植物间的含量均存在显著差异(P<0.05)。该地区植物中Mn、Zn、Ni、Pb、Cd含量均已达到甚至超过中毒水平,存在着受重金属毒害的潜在风险,但除Ni、Pb外,各重金属含量均在世界陆生维管植物相应元素的平均含量范围内。研究区5种植物叶片中的重金属含量分配模式均表现为Mn>Fe>Zn>Pb>Ni>Cd。Fe-Zn、Fe-Cd、Fe-Pb、Zn-Cd、Zn-Pb、Cd-Pb之间均具有显著正相关关系(P<0.05),说明以上各组元素的来源相似且植物对各组元素的吸收具有一定的协同效应。
To investigate the characteristics of heavy metal contents of plant in nature reserve for forest ecosystem, six kinds of elements （Fe, Mn, Zn, Ni, Pb, Cd） in the leaves of common plants in Leigong Mountain were measured respectively. The results showed that the contents of Fe and Mn were greater than 100 mg · kg-1 ,Zn was vary between 50,100 mg · kg-1 ,and those of Pb,Ni and Cd were lower than 50 mg· kg-1. The elements including Fe,Zn,Ni, Cd and Pb showed positive skew distribution, while the element Mn showed negative skew distribution. Except for Ni, the contents of left five elements showed significant difference among five species （P〈0.05）. The contents of Mn, Zn, Ni, Pb and Cd have reached and even more than the poisoning level of plants,plants had the potential risk of heavy metal poisoning. But except Ni and Pb, the heavy metal contents of all elements were within the scope of the average level of land vascular plants in the world. The absorption models of heavy metal elements of five species were showed Mn〉Fe〉Zn〉Pb〉Ni〉Cd. The significant positive correlations of contents were between Fe and Zn, Fe and Cd, Fe and Pb, Zn and Cd, Zn and Pb, Cd and Pb （P〈 0.05）, which showed that Fe-Zn, Fe-Cd, Fe-Pb, Zn-Cd, Zn-Pb, Cd-Pb had similar source and performed synergy effects when absorbed by plant in this research area.
出处
《北方园艺》
CAS
北大核心
2017年第17期110-114,共5页
Northern Horticulture
基金
国家自然科学基金资助项目(41563007)
贵州省优秀青年科技人才培养对象专项资金资助项目(黔科合人字[2015]21号)
贵州省优秀科技教育人才省长资金资助项目(黔省专合字[2012]80号)
贵州省高层次创新型人才资金资助项目(黔人领发[2015]3号)
贵州省高层次人才科研条件特助经费资助项目(TZJF2010年065号)
关键词
自然保护区
雷公山
常见植物
重金属
nature reserve
Leigong Mountain
common plant
heavy metal
