The vertical distribution laws of wind erosion matter over land surfaces in the cross region between farmland and grassland 农牧交错区地表土壤风蚀物垂直分布规律研究
Wind erosion is the main inducement and an important process of desertification , and also , a main environmental problem needed to be controlled in many countries and areas 摘要土壤风蚀是沙漠化过程的重要组成过程和首要环节，是许多国家和地区需要解决的一个主要环境问题。
Analyzing the sandstorm , the experts and scholars in our country have recognized that , the main reason of sandstorm happens is the increasing expansion of desertification land and the primary sector forming desertification of land is the soil wind erosion 专家学者研究沙尘暴发生的原因认为，我国沙漠化土地面积日益扩大是沙尘暴发生的重要因素，而土地沙漠化的首要环节是土壤风蚀。
She cant help talking about the measures happily , thanks to the guidance of the government and the experts , i am now full of confidence that the income will be increased through no tillage to improve soil , control erosion and improve our living environment 她兴奋地见人就说： “有政府和项目专家的指导，我对通过免耕改良土壤减少土壤风蚀，改善我们的生存环境，增加农民收入，充满了信心！ ”
So , it is significant from present and long - term benefits to design and make movable wind erosion tunnel , and to apply it as a tool to carry out research on protective cultivation , diminution of soil wind erosion , reduction through conservation tillage 因此，设计和制作移动式风蚀风洞，用风洞作为有力的工具，开展保护性耕作减少土壤风蚀，防治沙尘暴的研究就具有重要的现实意义和长远意义。为此本文进行了下列工作： 1
However , in observing natural wind erosion , because of the limitation of several factors , such as time , wind power , and the surface of land , it is difficult to take systematic and deeper research , es pecially to complete the research on the regularity of soil wind erosion in a short period 但是，自然风蚀的观测受到时间、风力、地表等多种因素局限，难以进行系统的、深入的研究，特别是在短时期内完成土壤风蚀规律性的研究。
The experiences of controlling sandstorm in the world indicate that , promoting conservation tillage can effectively control the raising of dust on soil surface , prevent soil from wind erosion , restrain the trend of land desertification , and ultimately , realize the purpose of controlling sandstorm 世界各国治理沙尘暴的经验表明，农田推行保护性耕作可以有效地控制地表土壤沙尘的扬起，防治土壤风蚀，抑制土地沙漠化的扩展趋势，最终实现治理沙尘暴的目的。
China agricultural university established an experiment plots in high land of fengning country , hebei province and observed the natural wind erosion . it indicated that , compared with traditional tillage - plowing up the soil in autumn , conservation tillage can reduce 77 % of soil wind erosion . it is necessary to research systematically and comprehensively on farmland wind erosion in order to study further about the effects and mechanism of conservation tillage and to explore the measures of preventing soil wind erosion 中国农业大学在河北丰宁坝上建立农田实验区，进行自然风蚀观察，表明与传统耕作(秋翻地)相比，保护性耕作可以减少土壤风蚀量77 ，进一步研究保护性耕作的防风蚀效应和机理，探索防治土壤风蚀的措施，需要对农田风蚀进行系统而全面的研究。
