农田风沙流结构中风蚀物粒度特征的变化  

Characteristics of Grain Size of Wind Erosion in Sand Flow Structure of Farmland

作　　者：要洁[1] 魏立涛[1] 常春平[1] 

机构地区：[1]河北师范大学资源与环境科学学院,河北省环境演变与生态建设省级重点实验室,河北石家庄050024

出　　处：《安徽农业科学》2012年第21期10763-10766,共4页Journal of Anhui Agricultural Sciences

摘　　要：[目的]了解河北坝上康保县农田风沙流中风蚀物的粒度在垂直高度和水平距离上的变化规律。[方法]在康保县选择农田进行野外观测,再对农田风蚀物用马尔文激光粒度仪进行粒度测定。[结果]风沙流中的风蚀物以>0.01 mm粒径为主,含量均在80%以上。各类耕地风蚀物粒径均集中在0.05～0.25 mm,且在这一粒径范围内风蚀较为严重。在垂直高度上,风蚀物的平均粒径随着垂直高度的增加呈指数递减。[结论]该研究可以为采取防风措施、防治农田风蚀提供依据。[Objective] The research aimed to study the characteristics of grain size of wind erosion in Hebei Bashang Kangbao County farmland in the vertical height and the level of the distance.[Method] In Kangbao County,field observation was conducted to determine the size of farmland wind erosion with Malvern laser particle size analyzer.[Method] The sand flow wind erosion content with 0.01 mm size was given priority to,and the content were more than 80%.All kinds of cultivated land were concentrated in wind erosion particle size of 0.05-0.25 mm,and wind erosion was relatively serious in the range of particle size.In vertical height,the average particle size of the wind erosion declined exponentially.[Conclusion] The research could provide the basis for the selection of the windbreak method and the prevention of the wind erosion in the farm.

关 键 词：农田 风沙 风蚀物 粒度 

分 类 号：S424[农业科学—植物保护]