摘要
开展土壤可蚀性K值季节性变化规律的研究,对于精确预报土壤侵蚀及深入了解土壤可蚀性K值的机理具有重要意义。基于14个自然降雨条件下的田间小区实测数据,研究了中国亚热带有代表性的不同类型土壤可蚀性K值季节性变化规律,并对其季节性变化的原因作了初步分析。结果表明:各小区土壤可蚀性K值在不同季节间都存在动态变化,总体变化趋势是春、夏季高,而秋、冬季低,并且不同小区土壤其可蚀性K值的变动趋势和变动幅度不同,同一土壤可蚀性K值不同季节间最高和最低值之间相差最高达6倍。
Research on the seasonal variation of the soil erodibility factor K has great significance for the accurate prediction of soil erosion and to further understand its mechanisms. Based on 14 natural rainfall erosion plots, the trend and magnitude of seasonal variations in erodibility for the typical soils of South China were studied. Results demonstrate that soil erodibility varied significantly among seasons. Erodibility was greater during spring and summer, while lower during autumn and winter. Further, the trend and magnitude of seasonal variations in erodibility are different among plots. The greatest change in the value of the seasonal soil erodibility factor K was attained 6 times during the time period studied.
出处
《水土保持学报》
CSCD
北大核心
2009年第1期41-44,共4页
Journal of Soil and Water Conservation
基金
国家重点基础研究发展计划项目(2007CB407206)
国家自然科学基金创新群体项目(40621001)
中国科学院知识创新工程领域前沿项目(ISSASIP0715)
