Rheological Properties of Automorphic and Semihydromorphic Cryometamorphic Northern Taiga Soils in Northeastern European Russia (Komi Republic)
- Авторлар: Kholopov Y.1, Khaidapova D.2, Lapteva E.1
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Мекемелер:
- Institute of Biology, Komi Science Center, Ural Branch
- Lomonosov Moscow State University
- Шығарылым: Том 51, № 4 (2018)
- Беттер: 418-427
- Бөлім: Soil Physics
- URL: https://journals.rcsi.science/1064-2293/article/view/224496
- DOI: https://doi.org/10.1134/S1064229318040075
- ID: 224496
Дәйексөз келтіру
Аннотация
Soil pastes at the water content corresponding to the maximum swelling of samples from different genetic horizons of cryometamorphic soils―surface-gleyic iron-illuvial svetlozem (Folic Albic Stagnosol) and peaty and peat humus-impregnated gleyic svetlozems (Histic Gleyic Stagnosols)―have been studied with an MCR-302 modular rheometer (Anton Paar, Austria). It has been found that the strongest interparticle bonds are formed in the horizons of cryometamorphic soils characterized by high contents of humic substances and organomineral Al–Fe–humus compounds. These are horizons of podzol microprofile (Eg and BHF) in iron-illuvial svetlozem and a humus-impregnated horizon (ELhi,g) in peaty and peat svetlozems. Organomineral Al–Fe–humus compounds, as well as the seasonal freezing of soils, determine the elastic-brittle character of interparticle interactions. The contents of clay fractions, exchangeable bases, and organic and organomineral substances impart viscoelastic properties to these contacts. An enhancement of elastic-brittle properties of soil is observed under the impact of gleying and freezing. The threefold decrease of the structural interaction parameter (∫Z) when going from automorphic to semihydromorphic conditions indicates a decrease in the resistance of peaty and peat svetlozems to mechanical loads under increasing hydromorphism compared to iron-illuvial svetlozems.
Негізгі сөздер
Авторлар туралы
Yu. Kholopov
Institute of Biology, Komi Science Center, Ural Branch
Хат алмасуға жауапты Автор.
Email: yuraholopov@yandex.ru
Ресей, Syktyvkar, 167982
D. Khaidapova
Lomonosov Moscow State University
Email: yuraholopov@yandex.ru
Ресей, Moscow, 119991
E. Lapteva
Institute of Biology, Komi Science Center, Ural Branch
Email: yuraholopov@yandex.ru
Ресей, Syktyvkar, 167982