Study on the situation of soil organic carbon storage in ecotone between ag riculture and anim al husbandry-A case study from Inner Mongolia

A biogeochemieal model(DNDC)for agro-ecosystem was employed to predict the soil organic carbon dynamics in ecOtone between agriculture and anim al husbandry in Inner Mongolia．The results show that the total soil organic carbon storage in 0～30cm soil of agricultural lands in Inner Mongolia is abo ut 466．226 million ton；the soil organic carbon is lost at a rate of 13．35 million t／a；and protective cultivations are very useful for accumulation of soil organic carbon in this areas ．