外源碳添加对三江湿地土壤有机碳矿化的影响

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文章编号：1003-6180（2026）02-0040-06

[中图分类号]S153.6 [文献标志码]A

Effects of Exogenous Carbon Additions on Soil Organic Carbon Mineralization in Sanjiang Plain Wetland

SHI Lanying * ， LI Muxi， LIU Yu， LI Xulong

（Mudanjiang Normal University， College of History and Culture， Mudanjiang ， China）

Abstract： A simulation experiment was conducted to investigate the effects of different concentrations of exogenous carbon addition on soil organic carbon （SOC） mineralization. The results showed that the cumulative SOC mineralization increased significantly with higher carbon addition concentrations， and the average mineralization rate peaked significantly at an addition concentration of 1.50%. The cumulative SOC mineralization was significantly positively correlated with microbial biomass carbon （MBC）， and the exogenous carbon concentration explained 48.70% of the variation in mineralization. Exogenous carbon addition significantly promoted SOC mineralization in the wetlands of the Sanjiang Plain， with a threshold concentration of 1.50%.

Keywords： exogenous carbon addition; soil organic carbon; organic carbon mineralization; active organic carbon components

湿地储存了全球约三分之一的土壤碳（C），是重要的土壤 C 库。（剩余5767字）