利用移动式风蚀风洞对秋翻地和作物残茬覆盖农田进行原位测试,探讨作物残茬覆盖农田地表风沙流的分布规律。结果表明:作物残茬覆盖农田地表的单位面积输沙量随风速与距地表高度的增加而明显增大,残茬盖度越大,输沙量越小;风沙流的活动主要集中在直立残茬高度范围内,在距地表300mm高度内的输沙量占输沙总量的86%以上;在高风速下65%以上盖度的残茬覆盖农田,具有更佳的风沙流截留效果。 In situ wind tunnel tests were carried out to evaluate the distribution of wind and sand flow in farmland covered with stubble and crop stubble. The results showed that the sediment discharge per unit area of ​​farmland covered by crop stubble increased obviously with the increase of wind speed and surface height, the larger the stubble coverage was, the smaller the amount of sediment was transported. The activity of wind-blown flow was mainly concentrated in upright In the height range, the amount of sediment transport within 300mm from the surface accounted for more than 86% of the total sediment transport. Stubble covered more than 65% of the area with high wind speed, which had better interception effect of sand flow.