Study on the Effect of Water Level Fluctuation on Soil Carbon Emission in Cattail Wetland

为了研究黄河中游水位波动对蒲草湿地土壤碳排放的影响，利用室内培养法分析不同水位变化后的CO2排放速率。结果表明：低水位水平下蒲草湿地土壤CO2排放速率变化于0~0.035 mmol·m−2·h−1，平均水平为0.017 mmol·m−2·h−1。高水位下蒲草湿地土壤CO2排放速率变化于0.005~0.035 mmol·m−2·h−1，平均水平为0.020 mmol·m−2·h−1。低水平水位下土壤CO2排放速率波动幅度大于高水平状态。水位变化对蒲草湿地土壤CO2排放速率的影响与土壤、植被的环境适应过程以及排放环境紧密相关。In order to study the influence of water level fluctuation in the middle reaches of the Yellow River on soil carbon emission in cattail (Typha angustifolia) wetland, the CO2 emission rate of different water level changes was collected by static alkaline absorption method. The results showed that under low water levels, the CO2 emission rate of soil in cattail wetland varied from 0 to 0.035 mmol·m−2·h−1, with an average level of 0.017 mmol·m−2·h−1. Under high water level, the CO2 emission rate of soil in cattail wetland varied from 0.005 to 0.035 mmol·m−2·h−1, with an average level of 0.020 mmol·m−2·h−1. The fluctuation amplitude of soil CO2 emission rate under low-level water level was greater than that under high-level state. The effect of water level changes on soil CO2 emission rate in cattail wetland is closely related to the environmental adaptation process of soil and vegetation and the emission environment.