内蒙古干旱荒漠草原面积很大,立地条件十分恶劣,草场已不同程度地沙化、碱化和退化,为了保证畜牧业的发展,急需植树造林,提高抗御自然灾害的能力。但在这样的地区植树造林后,苗木枯梢死亡现象比较严重。据调查,其主要原因是,该区活土层(棕钙土或栗钙土,一 Inner Mongolia arid desert grassland area is very large, site conditions are very poor, the grassland has been desertified to varying degrees, alkalization and degradation, in order to ensure the development of animal husbandry, the urgent need of afforestation and improve the ability to resist natural disasters. However, in such areas after afforestation, the death of seedlings dead more serious. According to the survey, the main reason is that the area of ​​living soil (brown soil or chestnut soil, a