上海世博会规划区典型绿地土壤肥力特性研究

通过室外调查与室内测定相结合的方法,对2010年上海世博会规划区内典型绿地的土壤肥力特征进行了研究。结果表明:世博会规划区绿地土壤普遍存在pH值高、EC值低、通气性差、水解氮含量低的特点,但有机质、容重、阳离子交换量、有效磷和速效钾能满足植物生长需要;相对于小区、学校等附属绿地,重工业基地附属绿地土壤速效养分、土壤孔隙等较低,土壤质量呈现下降趋势;土壤肥力内梅罗综合评价结果表明,世博会规划区内85%绿地土壤属中等肥力,15%属肥力瘠薄,土壤肥力总体偏低。部分肥力相对贫瘠或存在污染可能的土壤,适当改良或修复后可以应用于世博园绿地建设。

Study on the soil fertility characteristics of Shanghai World Exposition site

By outdoor investigation and indoor experiments,the soil fertility of typical greenbelts in Shanghai World Exposition site was studied.Results showed that the soils generally have high pH,low EC value,poor aeration,and low content of hydrolysable nitrogen.But the soil organic matter,bulk density,CEC,available phosphorous and readily available potassium are enough for the need of plant growth.The greenbelts of residential and school areas have higher soil fertility and soil porosity than those of the heavy industry area whose soil quality is in a descending trend.The overall evaluation of Nemoro showed that 85% of greenbelts are medium in soil fertility,and 15% are infertile.In general,the soil fertility in the researched zone is low.Through improvement and restoration,a part of soils relatively infertile or polluted can still be used for the greenbelt construction of Shanghai World Expostion zone.