庐山典型性森林土壤SOC、N贮量及垂直分布格局

Abstract

土壤有机质和氮素是土壤肥力的重要物质基础，对土壤生产力和土地可持续利用具有重要意义。以江西庐山5种典型森林土壤为研究对象，对5种不同森林土壤SOC、N贮量及垂直分布格局进行分析。结果表明，5种森林土壤全N含量和贮量同SOC分布格局一致，以0~10 cm最大，表现为随土层深度增加逐渐减小；表层土壤明显高于深层土壤，且不同土层的差异显著性不同；5种森林土壤C/N差异性极显著，其中落叶阔叶林地土壤C/N高于其它4种林地。 Soil organic matter and nitrogen are important material of soil fertility. They also have important significance and function for soil productivity and sustainable utilization of land. Taking 5 kinds of typical forest soils in Lushan Mountain as research objects, we analyze the content and storage of the 5 kinds of typical forest soil through setting up the sample land and calculating the content of SOC and N from different kinds of forest soil. The results show that the distribution of the content of N in the forest soil is in accordance with SOC. The maximum measurement emerges from 0 to 10 cm soil and the record declines with the increase of the soil layer depth. SOC in the surface soil is apparently higher than deep soil. The difference is significant after comparing the stock of soil SOC from different kinds of soil. Moreover, the C/N of 5 kinds of typical forest soil expresses significant difference. The C/N of deciduous broad-leaf forest soil is higher than the other 4 kinds of forest.