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河西走廊是甘肃省的荒地集中分布区,大规模开垦的对象。盐土生荒在该区占有千万亩以上的面积。为了给土壤调查、开垦荒地、改良土壤提供参考,有必要对这一地区的盐土形成规律及其发展加以研究。 一、盐土形成的基本条件 河西走廊是在喜马拉雅造山运动中形成起来的,东西横走长达千余公里的山间宽谷,南侧为祁连山(俗称南山),主峯高达四千余米,北侧为相互联结的马鬃山、合黎山和龙首山(通称北山),拔海二千余米。由于南山升起时的巨量冲积砾石掩埋北山的山麓,从而形成南高北低的倾斜面。更因地形的起伏摺皱,在走廊之中又有许多小山的突起。这些小山又把整个走廊分隔成许多大小不等的盆地。
Hexi Corridor is a concentrated distribution of wasteland in Gansu Province, the object of large-scale reclamation. Salty natives occupy more than 10 million mu in the area. In order to provide a reference for soil investigation, reclamation of wasteland and improvement of soil, it is necessary to study the law of salt formation and its development in this area. First, the basic conditions of the formation of salt Hexi Corridor formed in the Himalayan orogeny, things go more than a thousand kilometers wide mountain valley, south of the Qilian Mountains (commonly known as Nanshan), the main peak of up to four thousand meters, The north side of the interconnected Mazongshan, Li Shan and the first mountain (known as Kitayama), pull the sea more than 2000 meters. As a result of the rise of the Nanshan huge alluvial gravel buried Beishan foothills, thus forming a high south low slope. Even more due to the ups and downs of the terrain wrinkles, in the corridor there are many hills protruding. These hills again separate the entire hallway into many different sized basins.