上海市进博会花卉种植地土壤质量综合评价和改良初步研究——以凌空SOHO附近地块土壤为例

The Primary Research on Soil Quality Evaluation of Flower Plantation Site of China International Import Expo(CIIE)in Shanghai--Take the Soil Around Lingkong SOHO as an Example

加强城市土壤质量评价和改良研究,是面向社会生产实际的重点工作。以上海市凌空SOHO附近地块土壤为对象,通过对花卉种植地的土壤理化性质进行分析,盆栽试验分析土壤改良效果,以为城市森林生态修复提供技术和理论依据。结果显示:该地块的土壤质地以粉(砂)壤土为主,夹杂有少量的黏粒和砂粒。土壤密度较高(1.24~1.44 g/cm3),通气性差,土壤pH值整体偏碱性。EC值在0.30~2.44 mS/cm,有机质含量均较低(7.09~10.63 g/kg)是影响该区域花卉不能正常生长发育的最主要因素。采用50%酸性改良材料改良后,青菜种子发芽率显著提升,达到73.3%。土壤重金属元素和有机污染物含量均低于标准限值,并非影响绿化植物生长的限制因素。综合认为,上海市凌空SOHO附近土壤理化性质是影响该区域花卉种植成功与否的最主要因素,采用50%酸性改良材料对土壤进行理化性质的改良具有明显的效果。

The evaluation and improvement for urban soil is the key work which oriented the practical social production.In this study,took the soil around Lingkong SOHO,one of the flower plantation site of China International Import Exp(CIIE)in Shanghai province,as research object.The physicochemical properties in the industrial park site were analyzed,and evaluated the improvement effect through pot experiment,which provided technology and theory basis for ecological restoration of flower plantation site of CIIE.The results showed that silt loam was the composition of soil texture,with a spot of clay and sand in flower plantation site of CIIE,with higher bulk density(1.24~1.44 g/cm3),weaker air permeability,and alkaline soil.The EC value of soil was from 0.30 mS/cm to 2.44 mS/cm,the content of organic matter was low(7.09~10.63 g/kg),which were the main factors to hinder the plants growth.The germination of green vegetables reached 73.3%on the soil which modified by 50%acid materials.The heavy metals and organic pollutants contents were lower than standard value,which were not the limiting factor for the plant growth.Comprehensive,the physicochemical properties were the main factors which limited the success of flower planting,and 50%acid materials could significantly improve the physicochemical properties of soil.