Research on soil physicochemical properties of park green land in Nanchang City
In order to grasp the current situation of physicochemical actuality of urban green land soil,14 physicochemical indexes of 135 soil samples of park green land in Nanchang were measured,including soil bulk density,mass water content,saturated water holding capacity,capillary water holding capacity,non-capillary porosity,capillary porosity,total porosity,initial infiltration rate,saturated infiltration rate,pH,organic matter,ammonium nitrogen,available phosphorus and available potassium.The results showed that,the acidity and alkalinity of the green land soil in the main urban area of Nanchang were mainly mild acid and neutral.The organic matter content of 50%tested soil samples was in line with the standard CJ/T 340―2016"planting soil for greening",and the coefficient of variation was large.The saturation infiltration rate of 65.57%of the tested soil samples met the standard requirements.The bulk density of 55%of the tested soil samples was greater than the standard requirement of 1.35 g·cm-3.The total porosity of 81.67%of the tested soil samples was less than 50%.Soil for planting trees and shrub had better physicochemical characteristics than grassland.The mean value of available nutrients met the standard requirements,but the supply level varied greatly.The increased soil bulk density,reduced porosity of range soil and poor water capacity imposed restriction on the growth of landscape plants.
Nanchang Citypark green land soilphysicochemical propertiesvegetation typespatial distribution
万方数据
维普
