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• W4205285361 abstract "泥炭地是主要的甲烷（CH₄）排放源，甲烷循环过程对水位变化响应敏感。研究选取两块具有水位差异的泥炭地土壤，通过厌氧培养实验探究水位变化对泥炭地甲烷产生和甲烷厌氧氧化（Methane Anaerobic Oxidation，AOM）潜势的影响，并分析影响其潜势大小的生物地球化学因子。结果显示，高水位泥炭地（0 cm） CH₄产生累积量为（0.89±0.01）μg/g，要显著高于低水位（-30 cm：（0.70±0.03）μg/g）泥炭地甲烷产生量，但低水位AOM累积量要显著高于高水位泥炭地（0 cm：（2829.93±35.99）μg/g），低水位泥炭地AOM量为（3588.06±24.78）μg/g。通过相关性分析发现甲烷产生潜势与含水量和DOC具有显著相关性，AOM潜势与含水量、pH、DOC具有显著相关性，含水量和DOC是影响若尔盖泥炭地甲烷产生及AOM潜势大小的重要因子。此外，发现高水位泥炭地甲烷产生潜势对温度升高的响应较为明显，特别是表层土壤（0-20 cm）。本研究明确了水位变化对若尔盖泥炭地甲烷产生及AOM潜势的影响特征，估算了全国泥炭地甲烷产生及AOM潜势的大小，以期为减缓全球气候变暖提供一定的理论支撑。;Peatland is one of main sources of methane (CH₄) emissions, and the process of methane cycle is sensitive to the change of water table. In this paper, soil from two peatlands with the differed water table were cultivated without oxygen to explore the effects of water table change on methane production potential and methane anaerobic oxidation (AOM) in peatland and analyze the potential impact biogeochemical factors. Results showed that CH₄ production from high water table peatland (water table=0 cm:(0.89±0.01) μg/g) was significantly higher than that from low water table (water table=-30 cm:(0.70±0.03) μg/g) peatland. The AOM in the low water table peatland ((3588.06±24.78) μg/g) was significantly higher than that in the high water table peatlands ((2829.93±35.99) μg/g). The correlation analysis showed that methane production potential is significantly correlated with water content and DOC, and the AOM potential is significantly correlated with water content, pH and DOC. Water content and DOC are important factors affecting the methane production and AOM of the Zoige peatland. Our results also showed that the methane production potential at high water table peatland was significantly sensitive to warming, especially at surface soil (0-20 cm). This study clarified the influence of water table on methane production and AOM potential of Zoige peatland, estimated the methane production and AOM potential of peatlands from nationwide, and provided theoretical support in mitigating global change." @default.
• W4205285361 created "2022-01-26" @default.
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• W4205285361 date "2021-01-01" @default.
• W4205285361 modified "2023-09-30" @default.
• W4205285361 title "Effect of water table drawdown on soil methane production and anaerobic oxidation potential in the vertical profile of Zoige peatland" @default.
• W4205285361 doi "https://doi.org/10.5846/stxb202007061749" @default.
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