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首页> 外文期刊>Eurasian Soil Science >Markers of Soil Organic Matter Transformation in Permafrost Peat Mounds of Northeastern Europe
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Markers of Soil Organic Matter Transformation in Permafrost Peat Mounds of Northeastern Europe

机译：东北欧洲永久冻土泥炭土壤有机质转化标记

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For the paleoreconstruction of permafrost peat mounds and the identification of plant communities participating in the formation of peat, the contents of n-alkanes (C-20-C-33) have been determined, and relative changes in the stable isotope compositions of carbon and nitrogen and the C/N ratio have been analysed. Several indices (CPI (alkanes), P (aq), P (wax)) have been calculated to assess the degree of decomposition of the peats studied and the contributions of different plant species to their formation. It has been found that shortand long-chain n-alkanes are concentrated in high-moor peat, while medium-chain alkanes are typical for transitional peat. Integrated analysis of the studied markers has shown that the botanical and material composition of peat, anaerobic conditions of bog formation, and permafrost play an important role in the preservation of organic carbon in permafrost peat mounds. Alternation of plant associations is the main reason for changes in n-alkane concentrations, C/N ratios, and delta 13C values.
机译：对于Pemafrost泥炭土墩的古氏强度和参与泥炭形成的植物群群，已经确定了N-烷烃（C-20-C-33）的含量，并且碳的稳定同位素组合物的相对变化已经分析了氮气和C / N比。已经计算了几个索引（CPI（烷烃），P（AQ），P（蜡））以评估所研究的泥炭的分解程度和不同植物物种对其形成的贡献。已经发现，Shortand Long-Chain N-烷烃浓缩在高沼泽泥炭中，而中链烷烃对于过渡泥炭典型。研究的综合分析表明，泥炭植物和材料组成，沼泽地层的厌氧条件和多年冻土在多年冻土泥炭土墩的保存中发挥着重要作用。植物关联的交替是N-烷烃浓度，C / N比和DELTA 13C值变化的主要原因。

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