在內蒙古自治区的中部和西部,草原地带逐漸过渡到荒漠地带。随着气候的逐漸干旱和整个自然条件的变化,土壤自东南向西北呈明显的地带性分布:暗栗鈣土、淡栗鈣土、荒漠草原棕鈣土以及灰棕色荒漠土等。棕鈣土的面积約占內蒙古自治区总面积的14%,絕大部分是放牧地和荒地,很少进行耕种。所以研究棕鈣土的形成过程、理化特性、肥力 In the central and western Inner Mongolia Autonomous Region, grassland gradually transition to the desert zone. With the gradual droughty climate and the change of the whole natural conditions, the soil shows obvious zonal distribution from southeast to northwest: dark chestnut soil, light chestnut soil, desert steppe brown soil and brown desert soil. Calcareous soil area accounts for about 14% of the total area of ​​Inner Mongolia Autonomous Region, the vast majority of grazing land and wasteland, seldom cultivated. Therefore, the study of the formation process of brown earth, physical and chemical properties, fertility