北京市平原区农田土壤蚀积特征分析  

Analysis on Farmland Soil Erosion and Deposition Features in Beijing Plain

作　　者：王仁德[1,2,3] 邹学勇[2,3] 赵婧妍[2,3] 张艺磊[2,3] 

机构地区：[1]河北省科学院地理科学研究所,石家庄050011 [2]地表过程与资源生态国家重点实验室(北京师范大学),北京100875 [3]北京师范大学中国沙漠研究中心,北京100875

出　　处：《水土保持学报》2011年第1期20-24,29,共6页Journal of Soil and Water Conservation

基　　金：国家"十一五"科技支撑项目(2006BAD26B03);国家自然科学基金项目(40971011)

摘　　要：采用野外观测、风洞模拟和实验室分析等手段,对北京市平原区土壤风蚀和大气降尘两种自然过程共同作用下的农田土壤蚀积状况及其对土壤理化性质的影响问题进行了研究。结果表明,2009年研究区农田土壤风蚀强度为0.64t/hm2,风蚀物颗粒以粒径在20～80μm的尘粒为主;大气降尘强度为1.00t/hm2,降尘颗粒以粒径在10～50μm的尘粒为主。降尘强度大于土壤风蚀强度,农田地表以沉积为主,强度约为0.36t/hm2.a。降尘粒径比风蚀物粒径明显偏细,长期的蚀积作用导致土壤粒度组成变细。降尘中重金属元素的含量明显大于土壤和风蚀物中的含量,长期沉积作用导致土壤中重金属元素的累积。By bays of field observations,wind-tunnel simulation and laboratory analysis,under the common function of soil wind-erosion and atmospheric dustfall,the farmland soil erosion and sedimentary characteristics in Beijing plain and its effect on soil physical and chemical properties were studied.The results showed that soil erosion intensity in 2009 was 0.64 t/hm2,with particle diameter of 20~80 μm in the main;the atmospheric dustfall intensity is 1.00 t/hm2,with particle diameter of 10~50 μm in the main.The intensity of dustfall was over that of soil erosion,so deposition happenned in farmland surface with strength of about 0.36 t/hm2·a.Size of dustfall particles was smaller obviously than that of wind-erosion dusts,this leaded to the soil particles becoming finer and finer by long-term erosion and deposition effect.The content of heavy metal elements in dustfall was higher than that of soil and wind-erosion dusts,which leaded to the accumulation of heavy metals in soil.

关 键 词：土壤风蚀 大气降尘 蚀积特征 北京 

分 类 号：S157.1[农业科学—土壤学]