欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报

• 研究报告 • 上一篇    下一篇

南京市城乡公路蜀桧叶片中金属元素和氮、硫含量分析

殷云龙1;骆永明1;张桃林1;贺剑锋2;徐建华2   

  1. 1中国科学院南京土壤研究所,南京 210008;2江苏省中国科学院植物研究所,南京 210014

  • 收稿日期:2004-04-15 修回日期:2004-09-17 出版日期:2005-05-18

Concentrations of metallic elements,N and S in Sabina chinensis cv.pyramidalis leaves along urban-rural roadways of Nanjing city

YIN Yunlong1,LUO Yongming1,ZHANG Taolin1,HE Jianfeng2,XU Jianhua2   

  1. 1Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008, China;2Institute of Botany of Jiangsu Province and Chinese Academy of Sciences,Nanjing 210014,China

  • Received:2004-04-15 Revised:2004-09-17 Online:2005-05-18

摘要: 通过对南京市城乡公路(城市干线、绕城公路和城郊公路)和相对清洁对照点植物园环境中土壤和蜀桧叶片中金属元素和N、S含量的测定,研究了环境元素在土壤-植物-大气之间的转移.结果表明,在城市干线、绕城公路和城郊公路环境中生长的蜀桧叶片中,10种金属元素中有Al、Fe、Mo、Zn、Cd、Pb、As和Cr含量明显超过对照点,其中尤以Al、Fe、Mo和Zn最显著.公路环境蜀桧叶片中,Fe、Zn和As在土壤植物间的相关性显著,说明蜀桧可能是Fe、Zn和As的良好指示植物;蜀桧叶片中Al、Mo、Cu、Pb、Cd和Cr在土壤植物间相关性不显著,说明公路环境中其含量较高可能是受大气污染的影响.城市干线和绕城公路蜀桧叶片中的N和S含量高于对照点,而城郊公路则接近对照.相关分析表明,公路土壤含N量在土壤-植物间呈负相关,低于对照,含S量在土壤-植物间呈正相关,高于对照.因此,公路环境蜀桧叶片中较高的N含量可能是汽车尾气排放的NOx影响的结果,而较高的S含量则主要来自土壤.

关键词: 渗滤湿地, 污水处理, 垂直流, 人工土壤, 设计

Abstract: This paper measured the concentrations of metallic elements,N and S in soils and Sabina chinensis cv.pyramidalis leaves along the urban-rural roadways (urban trunk roads,belt highway,and suburban roads) of Nanjing city,with botanical garden as un-traffic impacted reference site,and discussed the transfer of test elements among atmosphere,plant and soil,as well as the impact of traffic- related pollution.The results showed that the concentrations of Al,Fe,Mo,Zn,Cd,Pb,As and Cr in Sabina chinensis leaves were significantly higher along urbanrural roadways than at reference site,being most remarkable for Al,Fe,Mo and Zn.The positive correlations between soil and Sabina chinensis leaf Fe,Zn and As concentrations in road environment indicated that Sabina chinensis might be a good indicator plant of soil Fe,Zn and As.The correlations between soil and plant leaf Al,Mo,Cu,Pb,Cd and Cr concentrations were not remarkable,and thus,their high concentrations in Sabina chinensis leaf in road environment might be caused by air pollution.The concentrations of N and S in Sabina chinensis leaf were higher along urban trunk roads and belt highway than at reference site,while those along suburban roads were similar to the reference.There was a negative correlation between soil and plant leaf N,and a positive correlation between soil and plant leaf S.The N content in roadside soil was lower,while the S content was higher than the reference,indicating that the higher Sabina chinensis leaf N content in road environment might be caused by the NOx from exhaust gas emission,and the higher leaf S content should be come from soil.

Key words: Infiltration wetland, Wastewater treatment, Vertical-flow, Artificial soil, Design