摘要
对土壤可蚀性K值进行研究有助于探索和分析沂河流域土壤侵蚀的空间分布特征。利用GIS空间分析和统计功能,探讨了土壤可蚀性K值的空间分布特征及其与土壤类型、土地利用、高程、坡度等影响因子之间的相互关系。结果表明:(1)研究区K值范围在0.031 1～0.193 3之间,均值为0.099 5,以较低可蚀性和中等可蚀性土壤分布最广,上游河谷和下游平原地区土壤可蚀性明显高于沂山、蒙山等高海拔地区;(2)不同土壤类型的可蚀性K值存在差异,粗骨土、石质土、山地草甸土和棕壤的可蚀性值较低,红黏土、水稻土、砂姜黑土、新积土和潮土的可蚀性值较高,易受到侵蚀;(3)土地利用方式对K值有明显的影响作用,不同土地利用方式的可蚀性K值大小依次为:耕地>未利用地>草地>林地;(4)随着海拔高度的上升,土壤可蚀性呈现逐渐降低的趋势;(5)不同坡度区间的K值存在差异,土壤可蚀性随坡度增加整体上呈现减小趋势。
The analysis for K value of soil erodibility is helpful to explore the spatial distribution characteristics of soil erosion in the Yihe River Basin.The spatial analysis and statistical functions of GIS were used to analyze the spatial distribution characteristics of soil erodibility(K value)and its relationship with soil type,land use,elevation,slope and other influencing factors.The K value in the study area ranged from 0.031 1 to 0.193 3 with a mean value of 0.099 5.Soil with low and medium erodibility was the most widely distributed.The soil erodibility of the upper river valley and the lower plain area was higher than that of the high elevation areas such as Yishan and Mengshan.The K values of Skeletol Soil,Litho Soil,Mountain Meadow Soil and Brown Earth were relatively lower,while those of Red Clay Soil,paddy soil,Lime Concretion Black Soil,Alluvial Soil and Fluvo-aquic soil were relatively higher,which were vulnerable to erosion.The K values of different land use patterns decreased in the order:cultivated land>unused land>grassland>forest land.Soil erodibility showed a decreasing trend with the increase of altitude.The K values of different slope intervals were different,and the soil erodibility decreased with the slope.
作者
李子君
王硕
林锦阔
崔希有
LI Zi-jun;WANG Shuo;LIN Jin-kuo;CUI Xi-you(College of Geography and Environment,Shandong Normal University,Jinan 250358,China;College of Earth and EnvironmentalSciences,Lanzhou University,Lanzhou 730000,China;Shandong Normal University,Jinan 250358,China)
出处
《土壤通报》
CAS
CSCD
北大核心
2019年第1期45-51,共7页
Chinese Journal of Soil Science
基金
国家自然科学基金项目(41101079)
教育部人文社会科学研究规划基金项目(17YJAZH050)资助
关键词
土壤可蚀性
K值
空间变异
沂河流域
Soil erodibility
K value
Spatial variability
Yihe River Basin
