北京山区砾石覆盖度和砾石含量的关系研究  

Study on the Relationship between Rock Fragments Cover and Weight Percentage in Beijing Mountain

作　　者：高杨[1,2] 符素华[1] 罗来军[1] 王楠[1] 朱旭[1] 

机构地区：[1]地表过程与资源生态国家重点实验室,北京师范大学地理学与遥感科学学院,北京100875 [2]北京市第五中学,北京100007

出　　处：《水土保持研究》2011年第4期145-149,共5页Research of Soil and Water Conservation

基　　金：国家重点基础研究发展规划项目“中国主要水蚀区土壤侵蚀过程与调控研究(2007CB407204)”;国家自然基金(40201031);北京市自然基金(8072016)

摘　　要：砾石是各种水文和侵蚀等过程综合作用的产物,是土壤退化和生态系统恶化的一个标志,反过来土壤中的砾石和地表砾石也影响到各种各样的侵蚀过程。研究基于北京山区3块农用地地表砾石覆盖度和分层(0-2,2-5,5-10,10-15,15-20 cm)砾石重量百分含量数据,对地表砾石覆盖度和砾石重量百分含量的关系进行了研究。结果表明:地表砾石覆盖度和砾石重量百分含量之间的相关系数随采样深度的增加而减小,相关系数和采样深度存在负相关,表层砾石百分含量和地表砾石覆盖度之间的相关性较底层好;梯田和自然坡两种不同状态下,砾石覆盖度同表层砾石重量百分含量都存在一定的相关性,砾石覆盖度与大粒径(6～20,20～60 mm)砾石百分含量的相关系数较小粒径(2～6 mm)好,砾石覆盖度与粒径>2 mm的砾石重量百分含量显著正相关。Rock fragment,a sign of soil degradation and ecosystems degradation,is the results of a variety of hydrologic and erosion processes.Conversely,the rock fragment also has effect on erosion processes.The relationship between rock fragment cover and weight percentage was studied according to the data of rock fragment and rock fragment weight percentage at different depths（0-2,2-5,5-10,10-15,15-20 cm）.The results show that the linear correlation coefficient between rock fragment cover and weight percentage increased with the decrease of soil depth.The relationship between rock fragment cover and weight percentage with large-size（6～20 mm,20～60 mm） was more significant than those with small-size（2～6 mm）.When the particle size is greater than 2 mm,the rock fragment cover significantly positively correlated with weight percentage.

关 键 词：砾石覆盖度 砾石重量百分含量 土壤侵蚀 

分 类 号：S157[农业科学—土壤学]