沿海滩涂土壤植物对碳排放的影响

Effects of Soil Plants on Carbon Emissions in Coastal Tidal Flats

本研究旨在探究沿海滩涂土壤性质对碳排放的影响。选取江苏滨海滩涂湿地的芦苇滩涂土壤、碱蓬滩涂土壤和光滩土壤作为研究对象,分析土层深度、温度、辅酶F420的分布与含量对滩涂土壤碳排放的影响,同时研究土壤理化性质以及厌氧培养对土壤产气潜力的影响。研究结果显示微团聚体比重普遍增加,当pH值大于8.4时,碳排放与pH值关系不显著;土壤电导率显著影响甲烷菌的活性,其中碱蓬土壤碳排放潜力最高,其次为芦苇,光滩土壤碳排放潜力最低;辅酶F420含量的变化能够反映光滩土壤土层深度的甲烷排放量变化。该研究为海滨湿地的保护与合理利用提供了科学指导。

The purpose of this study was to explore the impact of soil properties on carbon emissions along the tidal flats.In this study,the effects of soil depth,temperature,distribution and content of coenzyme F420 on soil carbon emissions were analyzed,and the effects of soil physicochemical properties and anaerobic culture on soil gas production potential were studied.The results showed that the specific gravity of microaggregates generally increased,and when the pH was greater than 8.4,the relationship between carbon emissions and pH was not significant,and the soil conductivity significantly affected the activity of Methanobacteria,among which Suaeda salsa had the highest soil carbon emission potential,followed by Phragmites australis and the lowest carbon emission potential in the bare beach soil,and the change of coenzyme F420 content could reflect the change of methane emissions in the soil depth of the bare beach soil.This study provides scientific guidance for the protection and rational use of coastal wetlands.