一、前言中卫格状沙丘铁路固沙是从1957年开始,采取沙障固沙与植物固沙相结合的办法,取得了一定的成果。回顾8年来的工作,有成功也有失败,为了总结经验,吸取教训,特就植物固沙方面提出初步总结(本文不涉及沙障固沙,沙障固沙在另文讨论)。包兰铁路在中卫县境西,通过腾格里沙漠的东南前沿。这里主要是格状沙丘,高低起伏很大,形成一望无际的沙山。其立地条件很差,主要特点是植被稀少(覆盖度仅1— I. INTRODUCTION Zhongwei grid sand dune railway sand fixation is from 1957 onwards, to take sand barrier sand fixation and plant combination approach, and achieved some results. Recalling the eight years of work, there are successes and failures, in order to sum up experience and lessons learned, especially in the field of plant sand put forward a preliminary summary (this article does not involve sand fixation, sand barrier fixation in another discussion). Baolong railway in Zhongwei County West, through the Tengger Desert southeast frontier. Here is the main grid dunes, ups and downs, forming an endless sand hills. The site conditions are poor, the main feature is the vegetation is scarce (coverage of only 1-