风沙土是风沙地区风成沙性母质上发育的土壤。主要分布在我国北半部的半干旱、干旱和极端干旱地区。其形成是在风蚀、沙压、淋溶过程和生物固沙、聚集营养元素过程的对立统一作用下发生发展的。它出现在不同的气候带,受自然地带性环境因素的影响。一方面成土过程不可避免地打上地带性的烙印,向显 Aeolian sandy soil is a kind of soil developed on the aeolian sandy parent material in the aeolian sand area. Mainly distributed in the northern semi-arid, arid and extremely arid areas. Its formation is in the wind erosion, sand pressure, leaching process and biological sand fixation, the process of gathering nutrients under the unity of opposites development. It appears in different climates and is affected by natural environmental factors. On the one hand, the process of soil formation is inevitably marked with a zonal mark