关键词: 上海, 绿地, 土壤质量

Abstract: Investigation of the soil quality of 319 samples from 18 newly-established green belts of Shanghai shows that the soil in newly-established green belts has some common properties.pH value is alkaline or strong alkaline,and the electroconductivity(EC) and the amount of organic matter are low.The soil is of high bulk density,in which 42.45% is larger than 1.35 Mg·m^-3.The soil aeration is poor,in which 83.2% is lower than 5%.The cation exchange capacity is suitable,in which the amount of hydrolyzable nitrogen and phosphorus are low but the amount of rapidly available potassium is suitable.Most soils are loam.The soil quality is one of the most important factors that limit the growth of plants and the effect of landscaping and ecology of green belts.For above problems,we should improve the soil quality in the following aspects:establishment of the municipal standard for soil quality,sampling methods,analysis methods,plant nutrition balance,soil safety,soil remediation and waste utilization,administrative strategy and so on.

Key words: Shanghai, green belt, soil quality