COMPOSITION AND HYDROPHOBIC PROPERTIES OF ORGANIC MATTER IN THE DENSIMETRIC FRACTIONS OF SOILS FROM THE SUBPOLAR URALS

Dymov, A.A.; Milanovskii, E.Y.; Kholodov, V.A.

Авторы: Dymov A.A., Milanovskii E.Yu, Kholodov V.A.
Журнал: Eurasian Soil Science
Том: 48
Номер: 11
Год издания: 2015
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 1212
Последняя страница: 1221
Оригинальные версии: Состав и гидрофобные свойства органического вещества денсиметрических фракций почв Приполярного Урала
DOI: 10.1134/S1064229315110058
Аннотация: Organic matter features in the upper mineral horizons have been studied for four soils in the Subpolar Urals: humusilluvial podbur (Entic Podzol), gleyic humusilluvial podbur (Stagnic Entic Podzol), ironilluvial podzol (Albic Podzol), and eluviated burozem (Leptic Cambisol). Organic matter pools have been separated by densimetric fractionation. The concentrations of carbon and nitrogen and the relative contributions of separate densimetric fractions to the total content of elements in the upper soil horizons reflect the genetic features of formation of the studied soils. The saturation of organic matter with nitrogen increases with increasing density of the fractions. The proportion of heavy fraction HF1 characterized by a high content of fine silt particles increases in the upper horizons of podburs (Entic Podzol, Stagnic Entic Podzol) and burozem (Leptic Cambisol). The contact wetting angles, which characterize the hydrophobic properties of soils, have been determined for the densimetric fractions and horizons of gleyic humusilluvial podbur (Stagnic Entic Podzol) and ironilluvial podzol (Albic Podzol). These values vary from 60 to 88° among the soil horizons and from 22 to 137° among the densimetric fractions. It has been found that the hydrophobic properties of the studied soil horizons are largely determined by the contents of free and occluded organic matter fractions.
Добавил в систему: Холодов Владимир Алексеевич

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COMPOSITION AND HYDROPHOBIC PROPERTIES OF ORGANIC MATTER IN THE DENSIMETRIC FRACTIONS OF SOILS FROM THE SUBPOLAR URALSстатья

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