|
2023, № 4 (58) |
|
SOIL SCIENCE
|
|
|
|
|
|
|
|
Shevchuk E.A., Ryumin A.G., Sukhacheva E.Yu., Toropkina M.A., Volina O.V. |
|
|
Soils of forest landscapes of the Norsky State Nature Reserve |
|
|
The morphological structure and properties of typical forest soils of the Norskiy state nature reserve were analyzed. According to the World Reference Base for Soil Resources, the objects of the study were defined as Folic Cambisols, Rubic Arenosols and Reductigleyic Gleysols (Gelic). The leading primary pedogenic processes have been identified. The estimation of intensity of weathering and mineral mass metamorphization processes of the middle part of soil profile in relation to soil-forming rock was carried out. The most intensive processes of weathering and metamorphization are manifested in the middle horizons of soils of Folic Cambisols group, where they are represented by disintegration, brunification and soil-structuring of mineral mass, which is indicated by both relative increase of physical clay content and oxalate-soluble compounds of iron and aluminum hydroxides. The leading primary pedogenic process in soils of Rubic Arenosols group is rubification. These soils are characterized by the less intensive course of brunification and weakly expressed disintegration of mineral mass than Folic Cambisols, which is due to the formation of this soil on the sedimentary depositions of light granulometric composition. In soils of Reductigleyic Gleysols (Gelic) group weathering and mineral mass metamorphization processes take place in the form of formation of reduced gley, gley migration of iron through the soil profile, as well as a group of cryogenic soil formation processes. In the upper part of the soil, on the border of the gley and cryometamorphic zones the weighting of the grain-side distribution and an increase in the content of oxalate-soluble compounds of iron and aluminum hydroxides can be seen, which is due to the migration of weathering products along the gradient of thawing in the seasonally thawing layer. The presence of permafrost in the lower part of the Gleysols soils makes it possible to diagnose cryogenic pedoturbation and cryogenic structuring soil formation. The latter process is clearly diagnosed by the curdled structure in the middle part of the soil profile.
|
|