| 交通污染对城市土壤和植物的影响 |
| 摘要点击 2527 全文点击 1844 投稿时间：2005-02-18 修订日期：2005-04-11 |
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| 中文关键词 交通污染 土壤 槐树叶片 重金属积累 城市生态环境 |
| 英文关键词 traffic pollution soils leaves of Sophora japonica heavy metal accumulation urban eco-environments |
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| 中文摘要 |
| 以我国西北地区大气污染严重的兰州市为研究区,分别采集了交通主干道两侧及远离交通主干道的公园及大学校园里的槐树(Sophora japonica L.)叶片和土壤样品,研究了交通污染对城市土壤理化性质和重金属积累以及植物叶片中重金属、氮、磷积累的影响.结果表明:①交通主干道两侧土壤的电导率和有机碳含量显著高于公园土壤而pH值显著低于公园土壤;②交通主干道两侧土壤中Zn、Cd、Hg、Pb、Cu、Cr和As等7种微量元素的含量显著高于公园土壤,表明交通污染导致了这些元素在土壤中的异常积累;③生长在交通主干道两侧的槐树叶片中Zn、Cd、As、Hg、Pb、Ni、Co、Cr、N等9种元素的含量显著高于生长在公园的槐树叶片,同样表明交通污染导致了这些元素在槐树叶片中的异常积累,但是不同元素在土壤和植物叶片中的积累程度存在着差异. |
| 英文摘要 |
| Soil samples and plant samples(leaves of Sophora japonica L.) were collected from the main trunk roadsides and parks far away from main trunk road in Lanzhou City of northwest China to examine the effect of traffic pollution on variation of physico-chemical properties and heavy metal contents in soils and on variation of the contents of heavy metals,nitrogen and phosphorus in leaves of S.japonica in the two sites.The results show that:①soil samples from the roadsides are significantly higher in electric conductivity and organic carbon content but lower in pH compared with those from the parks;②soil samples from the roadsides have significantly higher contents of Zn、Cd、Hg、Pb、Cu、Cr and As than those from the parks,suggesting that traffic pollution results in a considerable accumulation of these elements in the roadside soils;③leaf samples from the roadsides have significantly higher contents of Zn、Cd、As、Hg、Pb、Ni、Co、Cr and N than those from the parks,again indicating that traffic pollution results in a considerable accumulation of these elements in leaves of S.japonica growing in the roadside soils.However,there are different responses of different elements in soils and leaves of S.japonica to the effects of traffic pollution. |
