摘要
为提高城市绿地生态系统功能,了解上海全市的公园绿地土壤肥力整体状况,以上海全市16个行政区65个公园中87个绿地土壤(0~20 cm)为研究对象,测定土壤pH值、电导率(EC)、大量元素(氮、磷、钾)、中微量元素(镁、钙、硫、锰、铁和钼)等15项化学指标,通过单因子评价、综合评价法及GIS技术对公园绿地土壤肥力质量进行评价。结果表明,上海市公园绿地表层土壤整体呈碱性,EC值偏小,有机质、大量元素全量养分和速效养分大都处于中等水平,微量元素钼缺乏,其他元素含量充足;全氮和有效磷变异性强。上海市公园绿地土壤综合肥力质量整体呈中等水平,且空间上有北高南低的趋势;土壤肥力的限制因子主要为pH值、全氮、碱解氮、有效磷和有效钼,应采用改善土壤pH值、种植豆科植物、施用微肥等措施提高土壤肥力质量。
87 soil samples(0 ~ 20 cm)from 65 urban parks were collected in 16 districts of Shanghai in order to improve the eco-function of urban green space system and find out the soil fertility status of green space in Shanghai park. In this study,15 chemical indexes were selected,and soil fertility characteristics were evaluated by single factor evaluation,comprehensive evaluation and GIS.The results showed that the pH value of Shanghai park green space topsoil was alkaline and the electrical conductivity(EC)was relatively low.The content of organic matter,total nutrient and available nutrient was mainly at the medium level.The available molybdenum was lack in most park soils.The contents of potassium,calcium,magnesium,sulfur,iron,and manganese were sufficient.Total nitrogen and available phosphorus showed strongly variable. The Integrated Fertility Index(IFI)of Shanghai park green space was at middle level and showed a trend of gradual improvement from south to north.The soil limiting factors were pH,total and available nitrogen,available phosphorus,and available molybdenum.Measures such as improving soil pH,cultivating leguminous plant and applying micronutrient fertilizer should be adopted to improve soil fertility quality.
作者
骆玉珍
张维维
李雅颖
姚槐应
王永杰
韩继刚
LUO Yu-zhen;ZHANG Wei-wei;LI Ya-ying;YAO Huai-ying;WANG Yong-jie;HAN Ji-gang(College of Food Science and Technology,Shanghai Ocean University,Shanghai 200120;Shanghai Academy of Landscape Architecture Science and Planning,Shanghai 200030;Institute of Urban Environment,Chinese Academy of Sciences,Xiamen Fujian 361021)
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2019年第6期86-93,共8页
Soil and Fertilizer Sciences in China
基金
上海典型绿地土壤质量监测保障体系(上海市绿化和市容管理局)
关键词
公园绿地
土壤肥力
限制因子
综合评价
park green space
soil fertility
limiting factors
comprehensive evaluation
