北方农牧交错带耕地土壤有机碳储量变化模拟研究——以内蒙古自治区为例

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

摘要: 运用农业生态系统生物地球化学模型(DIDc)，估算北方农牧交错带内蒙古自治区耕地土壤C储量井研究其平衡状况结果表明，该区耕地0-30cm 土层土壤有机碳储量约为46622．6万t，目前土壤有机碳库处于严重负平衡，年净损失有机碳1335万t。指出干旱半干旱农牧交错区应推行免耕、休耕等保护性耕作措施以助于土壤有机碳的积累。

Abstract: 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 ．