Abstract:The hydrological condition influences the biogeochemical cycles of peatlands and maintains the structures and functions of peatland ecosystems. Therefore, adopting appropriately hydrological management measures during restoration is important to the rapid recovery of ecological functions in peatlands. However, it is unclear how soil carbon emissions respond to different hydrologic managements. In this study, the effects of different hydrological managements, including low water level (LR), high water level (HR), and high-low alternating water level (H-LR), on soil CO2 and CH4 emissions of the restored peatlands during the growing season in Changbai Mountains were investigated. Results showed that air temperature and water level changes were the main factors affecting the seasonal variation of soil CO2 and CH4 emissions in the study area. As affected by water level control, soil CO2 emission rate of H-LR fluctuated sharply during the growing season while showed a unimodal curve in other study areas, and were exponentially associated with air temperature (P<0.05). Soil CO2 emission rates were significantly negatively correlated with water level (P<0.05) except HR. During the growing season, soil CH4 emission rate of HR was bimodal while that of H-LR and NP was unimodal, and they were exponentially correlated with air temperature (P<0.05). The water level of LR was positively correlated with CH4 emission rate (P<0.05). There were significant differences in soil carbon emissions among restored peatlands with different hydrologic managements (P<0.05). HR had the lowest cumulative CO2-C emission, but it had the highest cumulative CH4-C emission and warming potential (P<0.05). The soil cumulative carbon emission in LR was significantly lower than the degraded peatland and its warming potential was the lowest. Our study suggests that low water level management should be taken as a short-term strategy in the early stage of peatlands recovery to better restore the carbon sink function of peatlands and weaken warming potential.