摘要： 在内蒙古西部沙漠进行了新月形沙丘消长及控制途径的研究。观测、对比了风速（V，米/秒）、输沙量（Q，克/分钟 ·厘米²）、地表粗糙度（Z₀，厘米）、摩阻流速（V，米/秒）、地表阻力（τ，公斤/米²）、风的扰动度（D）、风沙流结构数（S）。新月形沙丘与新月形沙丘链的消长取决于沙丘上部风沙流的饱和程度或丘脊上的蚀、积状况。控制新月形沙丘消长的主要途径是固、撵、拉、挡。综合运用这些方法，已创造出许多优良的治沙造林配置方式。“避实击虚”是选择治沙造林“突破点”的原则，就内蒙西部而论，选择丘间低地或丘脚首先造林，不仅有利于树木成活，而且能促进风力改变沙丘地貌，为沙地的综合利用创造良好条件。

关键词: 沙丘消长, 治沙造林, 固阻, 输导

Abstract: Growth and decline of barkhan and control methods have studied in the desert,western Inner Mongolia.Wind velocity (V,M·s^-1) ,quantity of sanding (Q,g·m^-1.cm^-2) ,surface roughness (Zo,cm) ,drag velocity (V,M·s^-1),ground resistance (T,kg·m^-2),disturbance of wind (D),structure value in the flow of wind and sand (S) have been observed and contrasted.The result show that the Growth and decline of barkhan and barkhan chain depend on the saturation degree in the flow of wind and sand over the dune,or state of wind erosion and deposition on the dune ridge.The major control method is fixing and stoping sand,driving sand,cuting dunes (removing sand),obstructing dunes.By synthesizing theses ways,many good dispose pattern of control desert and afforestation have been developed.‘Strike where enemy is weakest’ that is a principle for select‘breakthrough’ of control desert and afforestation.For the western Inner Mongolia,dune valleys and dune feet would be selected to precedence afforestation,which not only favour trees survive,but also promote changing of the landforms of dune by wind force.It would create good conditions for the comprehensive use of sandy lands.