Evolution of Organic Matter in Hummocky Bogs on the Barents Sea Coast in a Changing Climate

Василевич, Р. С.; Кузнецов, О. Л.; Лодыгин, Е. Д.; Zazovskaya, E. P.; Panyukov, A. N.

doi:10.1134/s1064229322070122

Cited by 2 publications

(2 citation statements)

References 34 publications

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“…Data on the composition and physico-chemical properties of peat soils and HA preparations isolated from them are presented in Table 3 . A more detailed characterization and description of the molecular properties of HAs have been published earlier [ 38 , 40 ].…”

Section: Methodsmentioning

confidence: 99%

Relating Paramagnetic Properties to Molecular Parameters of Humic Acids Isolated from Permafrost Peatlands in the European Arctic

Lodygin,

Vasilevich,

Abakumov

2023

Molecules

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Free radicals (FRs) are intermediate participants in the transformation process of soil organic matter, and free radical activity is a fundamental property of humic substances. The aim of this work was to conduct a comparative study of the paramagnetic properties of humic acids (HAs) isolated from Histosols by electron paramagnetic resonance (EPR) spectroscopy. The studied Histosols are found in permafrost peatlands in four natural geographic subzones of the European Arctic (from forest tundra to northern tundra). The results obtained showed that in anaerobic conditions on the peatlands in the tundra zone, the formation of semiquinone-type radicals occurs through the reduction of quinone fragments of HAs and leads to an increase in the concentration of paramagnetic centres within HAs. PCA analysis allowed us to reveal relationships between the properties of the initial raw peat samples, the molecular composition of the isolated HAs, and their paramagnetic parameters. It was found that FR localization occurs predominantly on aromatic fragments of lignin nature, which are confined to the low molecular weight fraction of HAs. The g-factor values of the EPR spectra of HAs indicate the presence of carbon- and oxygen-centred FRs in the HA structure, with a predominance of the latter.

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Section: Methodsmentioning

confidence: 99%

Relating Paramagnetic Properties to Molecular Parameters of Humic Acids Isolated from Permafrost Peatlands in the European Arctic

Lodygin,

Vasilevich,

Abakumov

2023

Molecules

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“…The content of total nitrogen, as well as that of humus, is a quantitative indicator of potential soil fertility and a characteristic property of a particular soil type. Most researchers note that mineral fertilizers, when used for a long time without manure and other organic fertilizers in arable soils, stabilize the humus content not as efficiently as they do in natural conditions without anthropogenic impact [87][88][89].…”

Section: Complex Fertilizersmentioning

confidence: 99%

The Role of Organic and Mineral Fertilization in Maintaining Fertility and Productivity of Cryolithozone Soils

et al. 2023

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Considerable attention of the world community is now focused on the implementation of measures in the interests of achieving the global food security for future generations. Particular aspects of this problem include efforts aimed at increasing crop yields through the use of fertilizers. The purpose of this review is to analyze the experience of using organic and mineral fertilizers to increase crop yields in the cryolithozone of the European part of Russia for food security purposes. The fertility restoration methods of various Retisols considered in the review are of primary importance for the agriculture in the forest zone where 91% of arable lands are represented by this soil type. As these soils are low-fertility, poorly humified and acidic, they largely require the use of chemization and biologization means which are therefore an important factor in ensuring food security under the conditions of modern challenges.

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Evolution of Organic Matter in Hummocky Bogs on the Barents Sea Coast in a Changing Climate

Cited by 2 publications

References 34 publications

Relating Paramagnetic Properties to Molecular Parameters of Humic Acids Isolated from Permafrost Peatlands in the European Arctic

Relating Paramagnetic Properties to Molecular Parameters of Humic Acids Isolated from Permafrost Peatlands in the European Arctic

The Role of Organic and Mineral Fertilization in Maintaining Fertility and Productivity of Cryolithozone Soils

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