秦淮河河岸带土壤理化性质分析

Analysis of soil physical and chemical properties of riparian zone along Qinhuai River

以南京秦淮河为例分析了河岸带土壤主要理化性质的变化。河岸带土壤含水量普遍较高,体积密度、总孔隙度、非毛管孔隙度和毛管孔隙度因取样地点不同而有较大差异。就秦淮河而言,上游土壤呈酸性,中游、下游土壤呈中性到弱碱性;土壤有机质含量变化显著,主要积聚在地表,全氮含量与土壤有机质呈极显著正相关;土壤pH与含磷量呈显著正相关;上游河岸土壤含磷量低于下游河岸全磷量,但土壤不同层次磷的含量变化不明显。

The soil physical and chemical properties of riparian zone along Qinhuai River in Nanjing were studied in this paper. The soil moisture of riparian zone were higher than that of droughty zone. Bulk density, total porocity, Capillary porocity and non-capillary porocity of different areas soils were evidently various. Soils of riparian zone in the upper reaches were acid, while that in middle and lower reaches were neutral or alkalescent. Organic matter（OM） change in quantity was marked. It accumulated mainly at the soil surface. There was significantly positive relation between soil total nitrogen（ TN） contents and OM. The significantly positive relation was found between soil pH value and phosphorus contents, as well. Soil total phosphorus（TP）contents in upper reaches were less than that in lower reaches. However, there were not distinct change between different layer soils about phosphorus contents.