苏北粉沙质海岸防护林土壤的理化特性

Soil physical and chemical properties in protective forest in sandy silt coastal areas of the Northern Jiangsu Province

在苏北沿海粉沙质海岸立地条件下,测定了苏柳、中山杉、美国白蜡3种防护林造林地的土壤容重、总孔隙度和有机质、速效氮、速效磷、含盐量、pH值等理化性质。结果表明:不同样地土壤体积质量、总孔隙度均不同,3种防护林地每层土壤体积质量、有机质含量和pH值均小于对照地。各土层有机质、速效磷和有效氮、含盐量、pH值从上至下逐渐减小,而土壤体积质量从上至下依次递增。根据土壤理化性质,初步分析了粉沙质海岸土壤特性对防护林营建的影响。

The soil bulk density,porosity,soil organic matter,hydrolysable N,available P,pH,salt content in the Saxlix jingsuensis plantation,Ascendens mucronatum plantation and Fraxinus americana plantation were determined in Northern Jiangsu.The results showed that the soil bulk density and the total porosity varied with the plantation types.Soil bulk density,soil organic matter content and pH values of each layer in the three protective forests were less than that in the control.Soil organic matter,available phosphorus,available nitrogen,salinity and pH were decreased with the increase of soil depth,while the soil bulk density increased.According to the soil physical and chemical properties,the impacts of soil properties on the protective forests were primarily discussed.