Peculiarities of Elemental Composition of the Pyrogenic Tundra Soils in Pur-Taz Watershed

About the authors:

Dmitrii V. Moskovchenko, Dr. Sci. (Geogr.), Head of the Geoecology Sector, Tyumen Scientific Center of the Siberian Branch of the Russian Academy of Sciences; Lead Research Associate, Institute of Environmental and Agricultural Biology (X-BIO), University of Tyumen; moskovchenko1965@gmail.com

Andrey A. Yurtaev, Cand. Sci. (Geogr.), Associate Professor, Institute of Environmental and Agricultural Biology (X-BIO), University of Tyumen; yurtaevgeo@yandex.ru

Mikhail D. Moskovchenko, Undergraduate Student, Institute of Earth Sciences, University of Tyumen; moskovchenkomd@yandex.ru

Abstract:

This article analyzes the composition of tundra soils of the Pur-Taz watershed in the areas of fires with different periods of limitation (2 and 28 years, respectively). Determination of the total content of chemical elements was performed using inductively coupled plasma (ICP) spectrometry. The authors note that the soils lack almost all the elements, in particular, such physiologically important for plants ones as Zn, Cu, and Ni.

The study has revealed a change in the composition of pyrogenic soils. Immediately after the fire, elements accumulated by plants (zinc, phosphorus, and cadmium) enter the soil. Then, in the course of post-fire recovery, elements-biofilms are intensively absorbed by plants, which causes depletion of soils. After 28 years, in the surface burned horizon, the content of P2O5, Cd, S, Hg, and Ag decreased significantly (almost twice compared to undisturbed soils). The use of micronutrients will contribute to the rapid restoration of vegetation cover in the fires and areas of technogenic disturbances.

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