Accumulation of organic matter in the mineral layers of permafrost-affected soils of coastal lowlands in East Siberia

Mergelov, N.S.; Targulian, V.O.

Авторы: Mergelov N.S., Targulian V.O.
Журнал: Eurasian Soil Science
Том: 44
Номер: 3
Год издания: 2011
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 249
Последняя страница: 260
DOI: 10.1134/s1064229311030069
Аннотация: On the basis of a large volume of literature and original data, the high content (1–7%) of organic matter in the mineral layer of loamy permafrost-affected soils of coastal lowlands in East Siberia (from the lower reaches of the Lena River to the lower reaches of the Kolyma River) has been statistically proved. In most cases, the reserves of Corg in the mineral layer of these soils exceed those in the surface organic horizons and constitute 60–90% of the total soil pool of Corg. The enrichment of the mineral layer with Corg is due to the cryogenic retention (retenization) of humus (the illuviation and accumulation of colorless humic substances above permafrost) and the cryogenic mass exchange (mechanical admixture of organic matter from the upper organic horizons into the mineral layers). The analysis of 60 soil profiles showed that the accumulation of organic matter above the permafrost table is observed in 43% of cases; in general, the organic matter distribution in the soil profiles is highly variable. A specific type of colorless humus is accumulated above the permafrost table. The mechanisms of its precipitation and transformation in the profile require further studies.
Добавил в систему: Мергелов Никита Сергеевич

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Accumulation of organic matter in the mineral layers of permafrost-affected soils of coastal lowlands in East Siberiaстатья

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