摘要
以上海典型搬迁地土壤为研究对象,通过野外调查,分析了搬迁地土壤理化特性、障碍因子及其障碍程度,探讨了不同搬迁地类型土壤特征差异。结果表明:上海搬迁地土壤容重大,均值为1.42Mg/m^(3),土壤压实严重;土壤非毛管孔隙度小,均值仅为3.31%,土壤通气性差;土壤持水能力和入渗能力均较弱,田间持水量均值为320.88g/kg,入渗率中位数仅为1.05mm/h;土壤pH值均值高达8.78,为碱性或强碱性;土壤EC值均值为0.15mS/cm,可溶性养分缺乏;土壤有机质含量偏低,均值为15.53g/kg;土壤水解性氮含量低,但有效磷和速效钾含量较丰富。不同搬迁地类型的土壤特性存在差异性,但城中村搬迁地土壤质量明显优于工企业搬迁地,尤其是土壤容重、饱和持水量、田间持水量及水解性氮(p<0.05)。搬迁地土壤质量的障碍因子及障碍程度顺序为:土壤物理指标>土壤养分指标>土壤化学指标。
Taking soils of typical relocation sites in Shanghai as the study object,through field investigations,soil physical and chemical properties,obstacle factors and their degree of obstacles of the relocation sites were analyzed,and the differences in soil characteristics of different relocation sites were discussed.The results showed that soil bulk density was large,with an average value of 1.42 Mg/m^(3),and soil compaction was serious;soil non-capillary porosity was small,with an average value of only 3.31%,and soil aeration was poor;soil water holding capacity and infiltration capacity were both weak.The average field water capacity was 320.88 g/kg,and the median infiltration rate was only 1.05 mm/h.The average pH was 8.78,which was alkaline or strongly alkaline.The average EC value was 0.15 mS/cm,lack of soluble nutrients;soil organic matter was low,with an average value of 15.53 g/kg;soil hydrolysable nitrogen was low,but the content of available phosphorus and rapidly available potassium was rich.There were differences in the soil properties of different types of relocation sites,but the soil quality of the relocation sites of urban villages was significantly better than that of industrial and enterprise relocation sites,especially the soil bulk density,saturation water-holding capacity,field water capacity and hydrolysable nitrogen were significantly better than that of industrial and enterprise relocation sites(p<0.05).The order of obstacle factors and obstacle degree of soil quality in the relocation site was:soil physical index>soil nutrient index>soil chemical index.
作者
梁晶
伍海兵
张浪
LIANG Jing;WU Haibing;ZHANG Lang
出处
《中国园林》
CSCD
北大核心
2021年第12期38-42,共5页
Chinese Landscape Architecture
基金
上海市绿化和市容管理局科技攻关项目(编号G200202、G190202)资助。
关键词
风景园林
搬迁地
土壤质量
障碍因子
主成分分析
landscape architecture
relocation site
soil quality
obstacle factor
principal component analysis
