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毛乌素砂区位于我国内蒙伊克昭盟南部、陕西北部和宁夏河东地区。研究地区属毛乌素砂区中东部,为干草原淡栗钙土亚地带。经两年来的调查,发现该砂区中东部固定砂丘成土条件的植被因素较复杂,除砂生植物外,还夹有草本成分,个别砂丘全部生长针叶灌丛——臭栢。由于风积和风蚀频繁,砂丘上的土壤不易保存完整的剖面。因此,土壤形成中的时间因素也就起着明显的作用。
Mu Us sand area is located in Inner Mongolia Iqiu League in southern, northern Shaanxi and Ningxia Hedong area. The study area belongs to the middle eastern area of Maowusu sand area, which is the light chestnut soil of the steppe. After two years of investigation, it is found that the vegetation factors of the fixed soil conditions in the middle and eastern parts of the sand area are complex. Apart from the sand-producing plants, herbs are also sandwiched between them. All the individual sand hills grow coniferous shrubs - Sabina vulgaris. Due to frequent aeolian and wind erosion, the soil on the sand hill is not easy to preserve the complete profile. Therefore, the time factor in soil formation also plays a significant role.