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Distribution Characteristic of Soil Organic Carbon Fraction in Different Types of Wetland in Hongze Lake of China

机译：中国洪泽湖不同类型湿地土壤有机碳级分的分布特征

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Soil organic carbon fractions included microbial biomass carbon (MBC), dissolved organic carbon (DOC), and labile organic carbon (LOC), which was investigated over a 0–20 cm depth profile in three types of wetland in Hongze Lake of China. Their ecoenvironmental effect and the relationships with soil organic carbon (SOC) were analyzed in present experiment. The results showed that both active and SOC contents were in order reduced by estuarine wetland, flood plain, and out-of-lake wetland. Pearson correlative analysis indicated that MBC and DOC were positively related to SOC. The lowest ratios of MBC and DOC to SOC in the estuarine wetland suggested that the turnover rate of microbial active carbon pool was fairly low in this kind of wetland. Our results showed that estuarine wetland had a strong carbon sink function, which played important role in reducing greenhouse gas emissions; besides, changes of water condition might affect the accumulation and decomposition of organic carbon in the wetland soils.
机译：土壤有机碳馏分包括微生物生物质碳（MBC），溶解有机碳（DOC），以及不稳定的有机碳（LOC），在中国洪泽湖的三种类型的湿地中研究了0-20cm深度曲线。在目前的实验中分析了它们的生态环境和与土壤有机碳（SoC）的关系。结果表明，活性和SOC内容都是由河口湿地，洪水平原和湖外湿地减少的顺序。 Pearson相关性分析表明MBC和DOC与SOC呈正相关。 MBC和DOC在河口湿地中的最低比率以及SOC的返回率表明，这种湿地的微生物活性炭库的周转率相当低。我们的研究结果表明，河口湿地具有强大的碳汇功能，在减少温室气体排放方面发挥着重要作用;此外，水状况的变化可能影响湿地土壤中有机碳的积累和分解。

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