【摘要】 内蒙古草原景观是在第三纪出现与形成的、而典型的草原土壤黑钙土和票钙土，则是第四纪暖湿时期的产物。土壤的形成过程落后于植被的演化。草原土壤退化是自然因素（主要是气候变化）和不合理的生产活动综合作用的结果。气候影响范围大但相对缓慢．人类的作用虽是局部的但要迅速和深刻得多。草原自然保护区在退化土壤的恢复与重建中应起三个方面的作用即在核心区保存模式土壤剖面，在过渡区研究土壤退化与恢复的机理、在试验区进行改良与防治土壤退化的试验和示范工作．全部工作应积极吸引当地农牧民的协助与参与。更多还原

【Abstract】 Since Holocene .soil has been advancing toward two directions,degradation and evolution as natural environment changes and productive scale extendes. In recent time .all changes of soil is caused by artificial action and natural factors. Research on climate change shows: since the pleistocene climate has been de veloping to aridity with fluctuation in inner Mongolia. Temperature rise and precipitation decrease resulted in vegetation type, biomass and quality changed since the last century. it made substances entering soil became less, mineralization speed up, soil nutrient reduced, soil structures were destroyed in different extent,evaporation became stronger .soluble salt accumunlated gradually. soil developed to degradation. It was the pro - cess of natural degradation. On the background of the global change. the problem of population .resources and environment become more sharp .Grassland was used in over-grazing condition,soil influx became lesser,outflow became more, the balance and cycle of energy and substances were destroyed. soil became sandy, infertile. Hardness increased. permeability decreased it was called artificial degradation process of soil.Natural reserve has three fundmental roles during the process of degraded steppe soil restoration; 1. Protecting typical soil profile and monitoring the changes of soil physical,chemical characteristics in core area. 2.The buffer zone can be used as field for study of soil degradation mechanism. 3. For sustainable use and development of grassland,we should set some examples for local people in experimental zone and absorb them to take part in the projects of protecting grassland.更多还原