南方红壤侵蚀区地形对土壤有机质空间分布的影响——以长汀县河田地区为例

Impact of topography on spatial distribution of organic matters in red eroded soil in south China——A case study at hetian in Changting county

摘要: 应用地统计学和GIS空间分析技术,对南方红壤侵蚀区土壤有机质进行了空间变异特征和空间插值研究,并通过空间叠置分析,探讨了高程、坡度对红壤侵蚀区土壤有机质空间变异的影响.结果表明:研究区土壤有机质含量处于较低的水平,土壤有机质含量随着高程的变化不明显,有机质较高的区域在海拔255~300m、300~400m、400~771m范围内,均占各自总面积的26%左右;土壤有机质含量随着坡度的增大而增加,有机质较高的区域在坡度0~8°、8~25°、25°范围内,分别占各自总面积的24.05%、26.11%、34.53%.

Abstract: The spatial variability and interpolation of organic matters in the red eroded soil in South China were studied by means of GIS spatial analysis and statistics.The result showed that the organic matter content in the soil was generally low.The content did not vary significantly with the elevation.At high altitudes,the areas with high organic matters constituted approximately 26% of that total area.The content of organic matters increased with steepness of the slope,where it varied from 24.05% to 34.53%.