Использование
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              13
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            С ЯМР-спектроскопии в исследовании органического вещества почв (обзор)

Чуков, С. Н.; Лодыгин, Е. Д.; Abakumov, Evgeny

doi:10.1134/s0032180x18080026

Cited by 4 publications

(1 citation statement)

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“…Для изучения состава и свойств гумусовых веществ почвы широко применяются различные инструментальные физико-химические методы [2][3][4][5][6]. К одному из таких методов относится метод гель-хроматографии, зарекомендовавший себя как надежный и быстрый способ фракционирования гумусовых веществ и определения их молекулярных масс.…”

Section: электронный научно-производственный журналunclassified

Influence of the peculiarities of using typical chernozem of the Kursk region on the molecular weight composition of labile humus substances

Saakian¹,

Ооо²,

Профи³

2021

АЭИ

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polydisperse compounds. Under the influence of agricultural use, the dispersion of LHS increases, and the molecular weight composition of LHS is trans-formed towards the accumulation of fractions with lower molecular weights in their composition. As a result, the number average molecular weight of LHS decreases from 15230 amu. in LHS virgin chernozem up to 11180-12770 amu. near LHS chernozem under permanent crops and fallow. The replacement of permanent steam with a deposit does not fundamentally affect the degree of dispersion of LHS and the values of the molecular weights of the fractions. There is only a tendency towards an increase in the relative content of fractions with high molecular weights. This is reflected in the value of the average molecular mass of LHS, which increased from 11180 amu in the variant with permanent vapor to 12530 amu. LHS has deposits. Keywords: TYPICAL CHERNOZEM, GEL-CHROMATOGRAM, FRACTION, MOLECULAR MASS OF FRACTION, AVERAGE MOLECULAR MASS, LGS (LABILE HUMUS SUBSTANCES)

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Section: электронный научно-производственный журналunclassified

Influence of the peculiarities of using typical chernozem of the Kursk region on the molecular weight composition of labile humus substances

Saakian¹,

Ооо²,

Профи³

2021

АЭИ

View full text Add to dashboard Cite

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Soil-Archaeological Study of the Votikeevo Medieval Archeological Site in the Northern Forest-Steppe Zone of the Southern Cis-Ural Region

et al. 2020

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Elemental Composition and Structural Features of Humic Acids from Floodplain Soils of the Selenga River Delta

Milkheev,

Baldanov

2024

Agrohimiâ

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The study of the elemental composition and structure of humic acids of floodplain soils of the delta of the Selenga River (Western Transbaikalia) was carried out. The research area belongs to the delta meadowmarsh and foreststeppe region, which is an area where deposits of sandy and silty fractions are actively carried out from the entire basin. Here, soils and vegetation are natural biofilters. Depending on the bioclimatic conditions, groundwater regimes, and sediment composition, soils are formed that differ in the composition of humus and humic acids (HA). The objects of research were alluvial (meadow, meadowmarsh, meadow saline) soils of the Selenga delta, according to the classification WRB – Fluvisols. The analysis of 13C-NMR spectra of HA preparations of the studied floodplain soils made it possible to identify ranges of chemical shifts belonging to carbon atoms of various functional groups and molecular fragments. NMR spectroscopy data showed that humic acids of alluvial meadow soil are more enriched in aromatic fragments than humic acids of meadowmarsh and meadow saline soils. A slightly higher degree of aromaticity in alluvial meadow and meadowmarsh soil is associated with environmental conditions and the component composition of the precursors of humification. An increase in the proportion of aliphatic structures and a decrease in the proportion of aromatic fragments in the composition of preparations of meadow salt marsh soil make it possible to judge the simplification of the structure of humic acid. Soil moisture in combination with salinization significantly reduces the rate of transformation of soil organic matter and leads to an increase in the proportion of non-oxidized aliphatic fragments. The use of NMR spectroscopy in the study of soils has significantly expanded the understanding of its composition and structure, deepened the understanding of the mechanisms of humification and transformation of soils of various genesis.

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Использование ¹³ С ЯМР-спектроскопии в исследовании органического вещества почв (обзор)

Cited by 4 publications

References 0 publications

Influence of the peculiarities of using typical chernozem of the Kursk region on the molecular weight composition of labile humus substances

Influence of the peculiarities of using typical chernozem of the Kursk region on the molecular weight composition of labile humus substances

Soil-Archaeological Study of the Votikeevo Medieval Archeological Site in the Northern Forest-Steppe Zone of the Southern Cis-Ural Region

Elemental Composition and Structural Features of Humic Acids from Floodplain Soils of the Selenga River Delta

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Использование 13 С ЯМР-спектроскопии в исследовании органического вещества почв (обзор)

Cited by 4 publications

References 0 publications

Influence of the peculiarities of using typical chernozem of the Kursk region on the molecular weight composition of labile humus substances

Influence of the peculiarities of using typical chernozem of the Kursk region on the molecular weight composition of labile humus substances

Soil-Archaeological Study of the Votikeevo Medieval Archeological Site in the Northern Forest-Steppe Zone of the Southern Cis-Ural Region

Elemental Composition and Structural Features of Humic Acids from Floodplain Soils of the Selenga River Delta

Contact Info

Product

Resources

About

Использование ¹³ С ЯМР-спектроскопии в исследовании органического вещества почв (обзор)