摘要
通过对河北省保定市距市中心不同距离的6个绿地类型(道路、居住区、学校、工业、公园、商业绿地)的44个采样点共132个土壤样本进行pH、有机质、养分含量(全氮、全磷、全钾、碱解氮、速效磷、速效钾)和铅(Pb)、镉(Cd)、铬(Cr)含量分析,利用土壤质量评价法(I;)、地积累指数法(I;)以及潜在生态危害指数法(R;)对不同类型绿地土壤进行综合分析。结果表明,不同类型绿地对保定市土壤化学性质影响显著,市中心和西北区域土地I;值高,其中一环居住区绿地最高。Pb、Cd、Cr质量分数均超过河北省土壤背景值,I;结果显示6个绿地类型Pb、Cr污染指数均小于1,属于无污染或轻微污染状态;除道路绿地Cd为重度污染状态外,其余为中度污染。R;显示道路绿地综合污染程度最高,达到重度污染,除三环学校绿地为轻微风险外,其他均为中度风险。
A total of 132 soil samples were analyzed for pH,soil organic matter,soil nutrition content(total nitrogen,total phosphorus,total potassium,alkali-hydrolyzable nitrogen,available phosphorus,available potassium)and the contend of lead(Pb),cadmium(Cd)and chromium(Cr)from 44 sampling sites of six green space types(street,residential,school,industry,park and commercial green space)at different distances of the city center.Soil Quality Index(ISQ),Geoaccumulation Index(I;)and Potential Ecological Risk Index(R;)were used to evaluate soil quality.The green space types had significant effects on soil chemical properties,and I;value was higher in the downtown and northwest area,especially in the first ring region.The concentrations of Pb,Cd and Cr were higher than the background value in Hebei Province.The I;results revealed that the pollution indexes of Pb and Cr were less than one,therefore,six green space types were no pollution or slight pollution.The road green space was severely polluted by Cd,while the others were moderately polluted.The R;showed that the comprehensive pollution degree of road green space was the highest and reached a heavy level,the school green space in third ring region was slight risked,and the others were moderated.
作者
邸东柳
牛小云
王绍坤
毕秋薇
张立业
黄大庄
Di Dongliu;Niu Xiaoyun;Wang Shaokun;Bi Qiuwei;Zhang Liye;Huang Dazhuang(Hebei Agricultural University,Baoding 071000,P.R.China)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2022年第6期88-95,110,共9页
Journal of Northeast Forestry University
基金
河北省教育厅青年基金项目(QN2022120)
河北省省属高等学校基本科研业务费项目(KY2021053)。
关键词
保定市主城区
绿地类型
土壤养分质量分数
土壤化学性质
土壤重金属污染
Main urban area of Baoding City
Green space type
Soil nutrition content
Soil chemical properties
Soil heavy metal pollution
