砾石对土壤可蚀性的影响及土壤可蚀性值估算方法  

Effects of Gravel Content on Soil Erodibility and the Methods of Estimating Soil Erodibility Factor K

作　　者：师长兴[1] 

机构地区：[1]中国科学院地理科学与资源研究所中国科学院陆地水循环及地表过程重点实验室,北京100101

出　　处：《土壤通报》2009年第6期1398-1401,共4页Chinese Journal of Soil Science

基　　金：水利部公益性行业科研专项(2007SHZ0901034);国家重点基础研究规划(973)项目(2003CB415202)资助

摘　　要：通过建立土壤相对侵蚀量与土壤砾石含量关系,并利用中国土壤类型数据库计算了我国58个土类的土壤可蚀性值。结果显示土壤中所含砾石对土壤可蚀性影响较大,按土壤类型数据库中土壤样品,同一土类因为砾石含量的变化,土壤可蚀性最大与最小值可以相差几百倍。分析发现计算土壤可蚀性值与已有实测资料比较接近。Through constructing the relationship between the relative sediment yield and gravel content in the soil, and using the database of soil types in China, the soil erodibility factor K of 58 types of soil in China was calculated. Results showed that the gravel content could change the soil erodibility greatly. The largest erodibility of soil samples might be over several hundreds times of the lowest of the same soil type for some soil types in the soil type database due to variation of gravel content. A comparison with the measured ones suggested that the method of calculating soil erodibility factor K advanced in this study was reliable.

关 键 词：土壤可蚀性 砾石 土壤相对侵蚀量 

分 类 号：S157.1[农业科学—土壤学]