城市绿地土壤理化性质和Pb、Cd含量空间分布——以重庆市北碚区为例  

Analysis of Spatial Variability of Pb,Cd and Urban Soil Physical and Chemical Properties——A Case Study of Beibei in Chongqing City

作　　者：武玲珍[1] 傅瓦利[1] 杨红英[1] 詹永锋[1] 王建[1] 郑荣静[1] 

机构地区：[1]西南大学地理科学学院,重庆400715

出　　处：《水土保持研究》2011年第5期171-174,共4页Research of Soil and Water Conservation

基　　金：西南大学第三届本科科技创新基金

摘　　要：城市绿地土壤作为城市生态系统的重要组成部分,对城市的可持续发展有重要的意义。为了更好地了解城市绿地土壤、充分发挥其功能,该文对重庆市北碚城区土壤容重、pH、有机质、CEC等理化性质和Cd、Pb含量的空间分布特征进行了分析。结果表明:西南部的土壤容重和pH值高于东北部;有机质整体偏高,且东北部高于西南部;西南部地区绿地土壤CEC含量略高于东北部;东北部地区土壤Cd和Pb含量高于西南部地区。绿地土壤在短时间内受到人为干预较为显著,但随着绿地土壤利用年限的增加,有向其所在地自然土壤特性发展的趋势。与土壤环境质量标准(GB15618-1995)相比,Pb、Cd含量均以二级标准为主,虽然其对人类和环境的危害性现在还没有体现出来,但随着时间推移,其危害性会逐渐体现出来,应引起我们的高度重视。As an important part of urban biogeocenose ecosystem,the urban green space soil has a significant meaning to the urban development.To better understand the soils of urban green space and to give full play to its functions,in this paper,we studied the spatial variations of physical and chemical properties of urban green soil in the northeast and southwest parts of Beibei City and also gave a sample urban soil quality evaluation.The soil bulk density,pH,organic matter concentration,CEC,Pb and Cd concentrations of all the soil samples from both parts of Beibei City were tested,and also the spatial variations of these properties were analyzed.The results showed that：（1）the soil bulk density and pH in the southwest area were higher than those from northeast area;（2）both the two parts had high organic matter concentrations,and the organic matter concentrations of northeast area were slightly higher than those from the southwest area;（3）the values of CEC in the southwest area were slightly higher than those in the northeast area;（4）the values of Pb and Cd concentrations in the northeast area were higher than those of the southwest area.In a short time period view,human activities had comparatively larger influences on the urban green soil properties than the natural evolution effects.However,the soil properties tended to back to the natural conditions as using time goes by.Compared with soil environmental quality standard（GB 15618-1995）,the Pb and Cd concentrations＇ levels were dominated by the second level.Even though the healthy risk of such high heavy metal concentrations had not shown up yet,they do have high potential risk to trigger health hazards.

关 键 词：城市绿地土壤 理化性质 PB Cd 反距离权插值法 重庆市北碚区 

分 类 号：S153[农业科学—土壤学] X53[农业科学—农业基础科学]