中文摘要：

【目的】分析我国辽东山区原始红松林土壤理化性质的空间分布格局,揭示原始红松林土壤有机碳与土壤理化性质的相互关系。【方法】采用剖面法和经典的土壤理化性质测定方法,以辽东山区白石砬子森林生态站原始红松林作为对象,按照原始红松林内红松、其他针叶树种以及阔叶树种组成比例的不同,将其划分为原始红松林Ⅰ（6红松4阔叶）、原始红松林Ⅱ（3红松2其他针叶5阔叶）和原始红松林Ⅲ（3红松7阔叶）3种类型,测定了3种原始红松林土壤理化性质的垂直分布特征,并分析红松林土壤有机碳与其他土壤理化性质（土壤体积质量、全氮、水解性氮、全磷、速效磷、全钾和pH值）的相关性。【结果】不同树种组成的原始红松林的土壤理化性质之间存在明显差异,其中原始红松林Ⅲ土壤的有机碳、全磷和速效磷平均含量最高,原始红松林Ⅰ土壤的全氮和全钾平均含量最高,原始红松林Ⅱ土壤的水解性氮、体积质量和pH值平均值最高。不同树种组成的原始红松林土壤有机碳与全氮、水解性氮、全磷、速效磷等4个土壤养分因子均呈显著正相关关系,与全钾呈显著负相关关系,其中相关性最高的是土壤全氮。另外,土壤有机碳还与土壤体积质量和pH值呈显著负相关关系。【结论】辽东山区不同树种组成的原始红松林土壤理化性质存在明显差异,但均与土壤有机碳表现出较高的相关性。

英文摘要：

【Objective】Spatial distribution of soil physical and chemical properties in original Korean pine forest in Eastern Liaoning mountainous area was analyzed and the relationship with soil organic carbon was investigated.【Method】Based on the tree species composition,the original Korean pine forests in Eastern Liaoning mountainous area were divided into three forest types,the original Korean pine forestⅠ（containing 60% Korean pine and 40% broadleaved tree）,the original Korean pine forestⅡ（containing contained 30% Korean pine,20% other coniferous tree,and 50% broadleaved tree）,and the original Korean pine forest Ⅲ（containing 30% Korean pine and 70% broadleaved tree）.Profile method and the classicmeasurement method of soil physical and chemical properties were used to analyze the vertical distribution characteristics of soil physical and chemical properties and the relationships among soil physical and chemical properties in original Korean pine forests.【Result】There were significant differences between soil physical and chemical properties in three original Korean pine forests.Variations of soil physical and chemical properties in these three forests were different.Soil organic carbon,total phosphorus and available phosphorus were the largest for original Korean pine forestⅢ,total nitrogen and total potassium were the largest for original Korean pine forestⅠ,and hydrolysable nitrogen,bulk density and pH value were the largest for original Korean pine forestⅡ.These differences were closely related with tree species composition.Soil organic carbon showed significant positive correlation with soil total nitrogen,hydrolysable nitrogen,total phosphorus,and available phosphorus,and significant negative correlation with soil total potassium.The total nitrogen had the most relevant relationship with soil organic carbon.Soil organic carbon also had significant negative correlation with soil bulk density and pH value.【Conclusion】There were significant differences in soil physical and chemi