Greenhouse Gas Fluxes and Carbon Sequestration in the Oligotrophic Peat Soils of Southern Taiga in Western Siberia

IF 1.4 4区农林科学 Q4 SOIL SCIENCE

Eurasian Soil Science Pub Date : 2024-03-05 DOI:10.1134/s1064229323602871

E. A. Golovatskaya, E. E. Veretennikova, E. A. Dyukarev

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Abstract

The carbon stock and the emission rates of greenhouse gases (CO₂ and CH₄) in the peat soils of southern taiga in Western Siberia were studied. The studied peat soils belonged to typical oligotrophic peat soils (Histosols) but developed in two contrasting mire ecosystems—forested and open bogs—that differed considerably in the vegetation cover, soil morphology, and hydrological and temperature conditions. The carbon stock in the upper 50-cm-thick layer reached 9.3 and 6.8 kg/m² in the forested and open bogs, respectively. The CO₂ and CH₄ emissions were measured using a static chamber method during the growing seasons in 1999–2014. The CO₂ fluxes emitted from the studied soils into the atmosphere were close in their value (116.1 and 123.4 mg CO₂/(m² h) for the forested and open bogs, respectively), whereas CH₄ fluxes differed considerably (0.57 and 2.66 mg CO₄/(m² h), respectively). This study highlights an important role of the species composition and hydrological regime of peat soils forming in different bog ecosystems in the estimates of the carbon sequestration and greenhouse gas fluxes in the region.

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西伯利亚西部南泰加低营养泥炭土中的温室气体通量和碳封存

摘要研究了西西伯利亚南部针叶林泥炭土的碳储量和温室气体（CO2 和 CH4）的排放率。所研究的泥炭土属于典型的寡营养泥炭土（Histosols），但生长在两种截然不同的沼泽生态系统中--森林沼泽和开阔沼泽--这两种生态系统在植被覆盖、土壤形态、水文和温度条件方面存在很大差异。在森林沼泽和开放沼泽中，上层 50 厘米厚的碳储量分别达到 9.3 和 6.8 千克/平方米。在 1999-2014 年的生长季节，采用静态室法测量了二氧化碳和甲烷的排放量。所研究的土壤排放到大气中的二氧化碳通量值接近（森林沼泽和开放沼泽分别为 116.1 和 123.4 毫克 CO2/（m2 h）），而 CH4 通量差别很大（分别为 0.57 和 2.66 毫克 CO4/（m2 h））。这项研究强调了不同沼泽生态系统中形成的泥炭土的物种组成和水文机制对该地区碳固存和温室气体通量估算的重要作用。

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来源期刊

Eurasian Soil Science 农林科学-土壤科学

CiteScore

2.70

自引率

35.70%

发文量

137

审稿时长

12-24 weeks

期刊介绍： Eurasian Soil Science publishes original research papers on global and regional studies discussing both theoretical and experimental problems of genesis, geography, physics, chemistry, biology, fertility, management, conservation, and remediation of soils. Special sections are devoted to current news in the life of the International and Russian soil science societies and to the history of soil sciences. Since 2000, the journal Agricultural Chemistry, the English version of the journal of the Russian Academy of Sciences Agrokhimiya, has been merged into the journal Eurasian Soil Science and is no longer published as a separate title.