Abstract
Morphological and physicochemical properties of soils of intact native forests of the Komi Republic (iron-illuvial podzols (Albic Podzols) and podzolic (Retisols) and peat-podzolic gleyic soils (Histic Stagnic Retisols, Histic Podzols)) are characterized. Soil properties are mainly determined by the landscape position, vegetation of ground cover, and forest stand structure. The acidity, base saturation, and particle-size distribution on reference soils of the region are analyzed. The studied soils differ in the stocks of carbon (from 2.9 to 12.1 kg m–2) and nitrogen (from 0.1 to 0.7 kg m–2). With respect to the content of carbon of water-soluble compounds in the upper litter subhorizon, forest soils of the Komi Republic can be arranged in the following sequence: soils of lichen pine forests < soils of blueberry–true-moss spruce forests < soils of lingonberry–true-moss pine forests < soils of sphagnum pine forests. More than a half of the soil organic carbon in the upper subhorizons of forest litter is represented by the carbon of cellulose and aliphatic fragments of humic substances. The contents of these compounds widely vary: from 17 to 38% for aliphatic fragments and from 15 to 66% for cellulose.
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This work was performed within the framework of state assignment Cryogenesis as a Factor of the Formation and Evolution of Soils in the Arctic and Boreal Ecosystems of the European Northeast under Conditions of Modern Anthropogenic Impacts and Global and Regional Climatic Trends (no. 122040600023-8).
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Translated by I. Bel’chenko
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Dymov, A.A. Soils of Native Forest Ecosystems. Eurasian Soil Sc. 56 (Suppl 1), S36–S45 (2023). https://doi.org/10.1134/S1064229323700199
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DOI: https://doi.org/10.1134/S1064229323700199