摘要
以浦西为主的上海中心城区典型公园和公共绿地土壤为研究对象,通过野外调查,分析绿地土壤基本物理特性、各物理性质的相关性以及不同植被类型对土壤基本物理性质的影响。结果表明:上海中心城区绿地土壤质地黏重,以粉(砂)质黏壤土为主;土壤体积质量偏高,37.72%的土壤超过《绿化种植土壤》要求;土壤孔隙较差,82.46%土壤非毛管孔隙度不符合标准要求,有高达95.61%绿地土壤总孔隙度不能满足植物正常生长;土壤饱和导水率较低,有86.85%的土壤小于5 mm/h;土壤持水能力差。除了饱和导水率与其他物理性质相关性不显著外,各物理性质均存在极显著相关性(P<0.01)。乔木地和灌木地的土壤物理性质明显优于草地。建议增施砂子和有机基质等改良材料,减少绿地土壤压实和增加绿地中乔、灌木比例来改善城市绿地土壤物理性质,以期提升城市绿地生态功能发挥。
Taking soils mainly in the typical parks and public green belts in Puxi district of the central urban area of Shanghai as the study objects, soil basic physical properties, their correlation and the influences of different vegetation types on soil basic physical properties were analyzed. The results showed that soil texture was clayey, mainly as silty clay loam. Soil bulk density was high, 37.72% of soil samples exceeded the standard of ＂Planting Soil for Greening＂. Soil porosity was poor, for instance, 82.46% of soil samples did not meet the standard requirements of non-capillary porosity, and total porosity of up to 95.61% of soil samples could not meet the normal growth of plants. Soil saturated hydraulic conductivity was low, up to 86.85% of soil samples was less than the standard requirement of 5 mm/h. Moreover, soil water-holding ability was poor. Except soil saturated hydraulic conductivity, the correlation between other soil physical properties were extremely significant（P0.01）. Soil physical properties of tree and brush were superior to those of grassland. It is proposed to increase the application of materials such as sands and organic matrix, reduce soil compaction and increase the proportions of tree and brush in green belts in order to improve soil physical properties and enhance the ecological function of urban green belts.
作者
伍海兵
WU Haibing1,2(1 Shanghai Academy of Landscape Architecture Science and Planning, Shanghai 200232, China; 2 Shanghai Engineering Research Center of Landscaping on Challenging Urban Site, Shanghai 200232, Chin)
出处
《土壤》
CAS
CSCD
北大核心
2018年第1期155-161,共7页
Soils
基金
上海市科委项目(14DZ0503200)
上海科委科技专项(17DZ1202801)资助
关键词
物理性质
绿地土壤
植被类型
上海中心城区
Physical property
Green belts soil
Vegetation type
Central urban area of Shanghai
