选取内蒙古西部的温带森林、温带草原、温带灌丛、温带荒漠和草甸共70个样地,对其土壤有机碳进行研究。结果表明,内蒙古西部不同植被类型的土壤有机碳含量不同,温带森林的固碳效果最好,其次为温带灌丛和草原,再次之为草甸和荒漠。内蒙古西部20cm土壤有机碳储量为11.034×10~8t,100cm土壤有机碳储量为22.062×10~8t,温带草原和荒漠碳储量最高。气候因素对内蒙古西部土壤有机碳含量的影响显著,偏相关分析结果表明气温是主要的影响因子。土壤全氮含量与土壤有机碳含量有明显的线性正相关关系。 A total of 70 plots of temperate forests, temperate grasslands, temperate shrublands, temperate deserts and meadows in western Inner Mongolia were selected to study their soil organic carbon. The results showed that the contents of soil organic carbon varied with different vegetation types in western Inner Mongolia. The temperate forest had the best carbon sequestration effect, followed by temperate shrublands and grasslands, again the meadow and desert. The 20cm soil organic carbon storage in western Inner Mongolia was 11.034 × 10 ~ 8t, the soil organic carbon storage in 100cm soil was 22.062 × 10 ~ 8t, and the temperate grassland and desert carbon storage was the highest. The climatic factors have a significant effect on soil organic carbon content in western Inner Mongolia. Partial correlation analysis shows that temperature is the main factor. Soil total nitrogen content and soil organic carbon content had a significant linear positive correlation.