摘要
通过选择南方城市常见的3种园林绿化植物(杜鹃花、桂花、栀子花)为研究对象,分析其对6种重金属元素(Mn、Zn、Cu、Ni、Cd、Pb)的吸收富集特征.结果表明:绿地土壤中6种重金属的平均含量由高到低的顺序为Zn>Mn>Pb>Cu>Ni>Cd,平均含量分别为221.111、104.791、82.238、57.289、42.673、5.113 mg/kg,且Cu、Ni、Cd、Pb元素的来源可能相同;杜鹃花、桂花、栀子花对6种重金属元素的总平均富集能力分别为0.34、0.28、0.19,且均表现出对Mn的富集能力最强,平均富集系数分别为1.23、0.73、0.31,而对Zn、Ni的富集能力最小;杜鹃花对6种重金属的转移能力最大,总平均转移系数为1.92,其次是桂花,总平均转移系数为1.62,栀子花最小,总平均转移系数为1.09;杜鹃花对Mn元素同时具有超富集植物两个基本特征.
The study analyzed the characteristics of absorption and accumulation for 6 kinds of heavy metal elements （Mn, Zn, Cu, Ni, Cd, Pb） in 3 common ornamental plants （Rhododendron simsii, Osmanthus fragrans, Gardenia jasrninoides） from cities in the South. Results show that the order of average contents of 6 heavy metal elements in green soil goes from high to low as follows： Zn 〉Mn〉Pb〉Cu〉Ni〉Cd, their average contents are respectively 221. 111, 104. 791, 82. 238, 57. 289, 42. 673 and 5. 113 mg/kg, and Cu, Ni, Cd and Pb elements may come from the same sources; that the overall average enrichment capacity of Rhododendron simsii, Osmanthus fragrans and Gardenia jasminoides to the 6 elements are respectively 0. 34, 0. 28 and 0. 19, showimg a strongest to Mn with average coefficients being 1.23, 0. 73 and 0.31 and a weakest to Zn and Ni; that Rhododendron simsii has the highest transloeation capacity to the 6 elements, its average coefficient being up to 1.92, Osmanthus fragrans comes the next, its average coefficient being 1.62, and Gardenia jasminoides is the last, its average coefficient being only 1.09; and that Rhododendron simsii, as hyper-aceumulator to Mn, has two basic characteristics at the same time.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2009年第3期21-25,共5页
Journal of Central South University of Forestry & Technology
基金
科技部基础条件平台建设项目(20070822)
湖南省重点实验室项目(06FJ3083
2007FJ4046)
中南林业科技大学青年基金项目(2008023B)
2006年度湖南省普通高校青年骨干教师培养对象项目
关键词
环境生态学
土壤重金属
园林植物
吸收富集
environmental ecology
soil heavy metals
ornamental plants
absorption and accumulation
