Changes in the Fractional Composition of Organic Matter in the Soils of the Forest–Steppe Zone during Their Postagrogenic Evolution

Ovsepyan, Lilit; Kurganova, I. N.; Gerenyu, V. O. Lopes de; Rusakov, Alexey; Kuzyakov, Y

doi:10.1134/s1064229320010123

Cited by 18 publications

(8 citation statements)

References 42 publications

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“…[8] The culmination of the grazing strategy is the introduction of a rotational pause not after the 9-year cycle of alienation, but for every 5th year and to coincide it not with the 10th year of non-mowing, but with the 5th mowed year, according to the 10-year general hay rotation. [9] With this variant of the regime, as agreed with Professor of the KAA V.S. Bobylev, the processes of phytocell migration, in general, the dissemination of plant components of meadow-steppe communities, will be closer to the natural and evolutionary gradients of biota that existed in the past.…”

Section: Absolutely Conservation (Ac) Regime Of Ccr Protection Contri...mentioning

confidence: 92%

Actual issues of preservation of unique landscapes

Volkova

Sivak

2022

BIO Web Conf.

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The study outlines the essence and social significance of nature reserves, identifies the features and conditions for improving the efficiency of their reproduction, specifies and supplements criteria and indicators for assessing the level of their use and reproduction efficiency. The modern functioning of the reserve, the dynamics of its development are considered, a preliminary assessment of the material and financial security and the reproduction adequacy of the Streletsky section of the reserve is given. A logical scheme for determining the optimal size and configuration of the Streletsky section of the reserve has been developed, recommended regimes of using its biota have been differentiated, promising directions and sources of optimizing the reproduction of meadow-steppe herbage of the reserve have been identified. It is human, his scientific knowledge, moral and spiritual world, consciousness, as the original source of diligence and care, has always been the main condition for the well-being of the nature of steppe natural complexes and their harmony with human. A person should feel like its kind master, bringing his good work and art into it.

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Section: Absolutely Conservation (Ac) Regime Of Ccr Protection Contri...mentioning

confidence: 92%

Actual issues of preservation of unique landscapes

Volkova

Sivak

2022

BIO Web Conf.

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“…Most of the works devoted to the study of fallow soils are focused on studying changes in the quantitative content and qualitative composition of OM, in the aspect of atmospheric carbon sequestration and prevention of global climate change [1][2][3][4]. At the same time, the postagrogenic transformation of soils affects almost all soil properties and, in particular, the properties of the old arable horizon (A p old ) [5][6].…”

Section: Introductionmentioning

confidence: 99%

Patterns of differentiation of the old arable horizon of fallow soils according to the content of mobile forms of manganese and copper

Giniyatullin

Окунев

Смирнова

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The differentiation of the old arable horizon (Ap old) by the content of mobile manganese (Mn) and copper (Cu) under fallow vegetation aged 15-20 years was studied. The accumulation of mobile Mn in the upper layer (0-10 cm), Cu in the 5-15 cm layer was observed. Linear modeling of the dependence of the content of Mn and Cu on alkali-soluble organic matter (OMP) and pH showed the influence of only one significant predictor on each element. The content of Mn has a significant strong (R2 adj.=0.72) influence of OMP. The pH has a statistically significant, but weak (R2 adj.= 0.19) effect on the Cu content. The difference in the patterns of differentiation is associated with the accumulation of mobile Mn by newly formed organic matter (OM) in fallows and the migration of mobile Cu with soluble fractions of OM in acidic soils. The study of changes in the mobility of heavy metals (HMs) in fallows is necessary to reduce environmental risks when changing land use, as well as to provide a realistic prediction of atmospheric carbon sequestration in fallow soils, taking into account changes in the level of toxicity of HMs. The relevance of these studies is associated with the fact that the removal of lands with heavy HM contamination from arable circulation in fallows is practiced more and more often.

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“…The method is based on the structural features of SOM; when using this method of analysis, organic matter can be divided into three groups (free, occluded and organo-mineral). Their differences are associated with their composition and resistance to biodegradation [27,28].…”

Section: Introductionmentioning

confidence: 99%

Assessments of Organic Carbon Stabilization Using the Spectroscopic Characteristics of Humic Acids Separated from Soils of the Lena River Delta

Polyakov

Abakumov

2021

Separations

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In the Arctic zone, where up to 1024 × 1013 kg of organic matter is stored in permafrost-affected soils, soil organic matter consists of about 50% humic substances. Based on the analysis of the molecular composition of humic acids, we assessed the processes of accumulation of the key structural fragments, their transformations and the stabilization rates of carbon pools in soils in general. The landscape of the Lena River delta is the largest storage of stabilized organic matter in the Arctic. There is active accumulation and deposition of a significant amount of soil organic carbon from terrestrial ecosystems in a permafrost state. Under ongoing climate change, carbon emission fluxes into the atmosphere are estimated to be higher than the sequestration and storing of carbon compounds. Thus, investigation of soil organic matter stabilization mechanisms and rates is quite an urgent topic regarding polar soils. For study of molecular elemental composition, humic acids were separated from the soils of the Lena River delta. Key structural fragments of humic matter were identified and quantified by CP/MAS 13C NMR spectroscopy: carboxyl (–COOR); carbonyl (–C=O); CH3–; CH2–; CH-aliphatic; –C-OR alcohols, esters and carbohydrates; and the phenolic (Ar-OH), quinone (Ar = O) and aromatic (Ar–) groups as benchmark Cryosols of the Lena delta river terrestrial ecosystem. Under the conditions of thermodynamic evolutionary selection, during the change between the dry and wet seasons, up to 41% of aromatic and carboxyl fragments accumulated in humic acids. Data obtained showed that three main groups of carbon played the most important role in soil organic matter stabilization, namely C, H-alkyls ((CH2)n/CH/C and CH3), aromatic compounds (C-C/C-H, C-O) and an OCH group (OCH/OCq). The variations of these carbon species’ content in separated humics, with special reference to soil–permafrost organic profiles’ recalcitrance in the current environment, is discussed.

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Changes in the Fractional Composition of Organic Matter in the Soils of the Forest–Steppe Zone during Their Postagrogenic Evolution

Cited by 18 publications

References 42 publications

Actual issues of preservation of unique landscapes

Actual issues of preservation of unique landscapes

Patterns of differentiation of the old arable horizon of fallow soils according to the content of mobile forms of manganese and copper

Assessments of Organic Carbon Stabilization Using the Spectroscopic Characteristics of Humic Acids Separated from Soils of the Lena River Delta

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