太中银铁路梅花井段草障植物固沙带生态效益研究

太中银铁路穿越毛乌素沙地的西南缘，沿线分布有固定、半固定沙丘和流动沙丘、沙地，其中定银线的梅花井—宁东区段（梅花井段）沙害严重。根据其沙源情况与沙害特点，采用了远阻近固的沙害治理措施，固沙措施为草障植物带。基于太中银铁路梅花井段的风沙治理体系，分析评价了草障植物固沙带在降低近地表风速、减少主风向输沙量、提高地表粗糙度以及不同沙层的含水率、植株成活率及生长状况等方面的效益，并得出相应结论。

Study on Ecological Benefits of Sand-fixation Plant Zone under Grass Barriers along Meihuajing Section of Taiyuan-Zhongwei-Yinchuan Railway

Taiyuan-Zhongwei-Yinchuan Railway goes through the southwest edge of Maowusu Desert. There are many fixed and semi-fixed or migratory dunes and sandy areas along the railway, wherein the sand damage is most severe in the Meihuajing-Ningdong Section (i.e. Meihuajing Section). According to the situation of sand source and the features of sand damage, the control measures of remote-prevention-close-fixation were adopted with plant zone under grass barriers used as sand-fixation method. Based on the wind sand control system along the Meihuajing Section, the benefits of this sand-fixation plant zone under grass barriers, including reduced near-surface wind speed, reduced sand transport in prevailing wind direction, improved surface roughness, water content in various sandy layers, survival rate and growth condition of plant, were analyzed and evaluated, then the related conclusion was obtained.