摘要
以青海省乐都县、互助县6条侵蚀沟为研究对象,收集了研究区域的降雨、地形地貌、植被、土壤等数据,系统分析了各因子与土壤侵蚀量的关系。结果表明,该研究区域年侵蚀厚度与年降雨总量的变化规律不明显,土壤容重、植被覆盖度和坡度三个因子的共同作用对侵蚀量有显著的影响。区域内各影响因子对土壤侵蚀影响的大小排序为:植被盖度>坡度>土壤容重>土壤可蚀性>降雨侵蚀力,再次说明退耕还林(还草)工程能够有效改善区域水土流失问题。
In this study we took six erosion gullies in Huzhu and Ledu counties as research objects,collected the data of rainfall,topography,vegetation and soil,and analyzed the relationship between the soil erosion amount and the impact factors. The results showed that the change of erosion thickness and rainfall were not apparent, but the soil bulk density,vegetation coverage and slope had a significant impact on erosion. The affection of influencing factors on soil erosion was vegetation coverage slope bulk density soil erodibility rainfall erosivity; ＂ returning farmland to forest or grassland＂ project effectively improved regional soil erosion problems.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2014年第4期22-27,共6页
Journal of Arid Land Resources and Environment
基金
青海省林业厅(横向合作项目)资助
关键词
土壤侵蚀厚度
植被盖度
坡度
降雨
容重
土壤可蚀性
soil erosion thickness
vegetation coverage
slope
rainfall
density
soil erodibility
