南京市城乡公路绿地土壤重金属变化及其评价
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江苏省自然科学基金“公路环境污染与绿化植物防护效应、防护模式研究”(BK2002074);国家科技部重大基础项目“典型区土壤和植物中重要化学物质的时空分布规律和风险预测”(2002CB410810)资助


ASSESSMENT ON VARIATION OF HEAVY METALS IN THE GREENBELT SOILS ALONGSIDE URBAN-RURAL ROADWAYS IN NANJING CITY
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    摘要:

    通过对南京市公路绿地系统(城市干线、绕城公路和城郊公路)土壤重金属的调查和分析,并与相对清洁点植物园植被土壤进行比较,研究了公路绿地土壤重金属分布的特点:公路绿地土壤重金属元素含量一般高于“清洁区”,其中土壤Mo、Zn、As、Cd、Cr、Cu、Fe、Mn的含量以绕城公路最高,土壤Pb的含量以城市干线最高,土壤Al的含量以城郊公路最高.城市干线、绕城公路、城郊公路和相对清洁点的土壤重金属多样性指数分别为0.261、0.293、0238、0236,仍以绕城公路最高,城市干线次之,城郊公路最低,公路土壤重金属多样性指数均高于“相对清洁点”.应用主成分分析方法对土壤样本进行了排序和聚类分析,结果表明:样本点表现了较好的以取样路线聚类的特点,各取样点土壤重金属含量存在明显的演变分异.土壤重金属演变的趋势可解释为:绕城公路是高Zn、Mo、Cd、As、Cr、Fe、Mg、Cu、Mn、Pb区,城市干线是高Pb区,城郊公路是高Al和Fe区,相对清洁点是低重金属区.

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    Soils of greenbelts alongside in road system (urban trunk roads, belt highways and suburban roads) as well as of the Nanjing Botanical Garden cited as a clean zone were surveyed and assessed for heavy metals. The results show that the contents of most heavy metals in the soils of on the roadside are higher than in the soil of the clean zone. The highest concentrations of Mo, Zn, As, Cd, Cr, Cu, Fe and Mn are found in the soils alongside the belt highways, that of Pb in the soils along side the urban trunk roads and that of Al in the soils alongside the suburban roads. This phenomenon could be further confirmed with the Shannon Weaner Index, indicating a declining order of belt highways (0.293) > urban trunk roads (0.261) > suburban roads (0.238) > "clean zone" (0.236). This result reflects significant variation of soils accumulating heavy metals;The princi pal component plot reveals that the belt highways are areas high in heavy metals;the urban trunk roads areas high in Pb, the sub urban roads areas in Al and Fe, and the clean zone Botanical Garden an area low in heavy metals.

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殷云龙,宋静,骆永明,张桃林,贺剑锋,徐建华.南京市城乡公路绿地土壤重金属变化及其评价[J].土壤学报,2005,42(2):206-210. DOI:10.11766/trxb200402230205 Yin Yunlong, Song Jing, Luo Yongming, Zhang Taolin, He Jianfeng, Xu Jianhua. ASSESSMENT ON VARIATION OF HEAVY METALS IN THE GREENBELT SOILS ALONGSIDE URBAN-RURAL ROADWAYS IN NANJING CITY[J]. Acta Pedologica Sinica,2005,42(2):206-210.

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  • 收稿日期:2004-02-23
  • 最后修改日期:2004-06-05
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  • 在线发布日期: 2013-02-25
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