Soil organic carbon (SOC) associated with iron (Fe-OC) can be recognized as an important component of the stabilized carbon pool. In permafrost regions, slump deformation can expose soil organic carbon and alter moisture conditions, which change the Fe-OC distribution. We measured the top 30 cm of soils in five slump deformation landscapes under three vegetation types on the middle and eastern Qinghai-Tibetan Plateau. Three stages of slump deformation were defined according to their microtopography. In the slump deformation areas, the SOC and total nitrogen (TN) contents in the surface 30 cm of soils were all lower than the soils without slump deformation in wet meadow (22% and 26%), meadow (16% and 29%), and steppe (14% and 20%) areas. The contents of Fe-OC in wet meadow were 4.1% and 12.5% in the soils without and with slump deformation, respectively, whereas these contents in the meadow and steppe soils were 25.6% and 17.2%, respectively. Slump deformation greatly changed the physiochemical soil variables and affected the Fe-OC% based on different vegetation types. Fe-OC was correlated with factors such as soil moisture, pH and C/Fe ratio. The study shows that slump deformation greatly affected the SOC and TN distribution and SOC stabilization processes in areas with slump deformation features.

与铁（Fe-OC）相关的土壤有机碳（SOC）可被视为稳定碳库的重要组成部分。在多年冻土地区，坍落度变形会暴露土壤有机碳并改变水分条件，从而改变Fe-OC的分布。我们在青藏高原中部和东部的三种植被类型下测量了五个坍落变形景观中的前30 cm土壤。根据坍落变形的微观形貌定义了三个阶段。在塌陷变形区，土壤30 cm的土壤中的SOC和总氮（TN）含量均低于湿草甸（22％和26％），草甸（16％和29％）的无塌落变形的土壤。以及草原（分别占14％和20％）的区域。在没有坍落变形和有坍落变形的土壤中，湿草甸中Fe-OC的含量分别为4.1％和12.5％，草地和草原土壤中的这些含量分别为25.6％和17.2％。塌陷变形极大地改变了土壤的理化变量，并影响了基于不同植被类型的Fe-OC％。Fe-OC与土壤湿度，pH和C / Fe比等因素相关。研究表明，坍落度变形对具有坍落度变形特征的地区的SOC和TN分布以及SOC稳定过程有很大影响。