Monitoring changes in soil dispersity and humus content under increasingly arid climate conditions

Kryshchenko, V. S.; Rybianets, T. V.; Kravtsova, Natalia; Biriukova, Oxana; Zamulina, Inna

doi:10.1134/s2079096114030020

Cited by 3 publications

(5 citation statements)

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“…To enlarge the body of evidence for the universal property of equilibrium coefficients, literature data on the content of humus in clay and fine and medium silt were generalized [11,19,20]. From these data, the average arithmetic values were determined for the analytical content of humus in physical clay of the soil samples and the calculated values with consideration for the equilibrium coefficients.…”

Section: Resultsmentioning

confidence: 99%

“…Literature data were also used [7,11,19]. Changes in soil dispersivity among the seasons and years were monitored in the Botanic Garden of the Southern Federal University in 2009-2014.…”

Section: Soil Physicsmentioning

confidence: 99%

“…Separation of dissimilar elements of the PSS [8][9][10][11]22]. The following conventionally dissimilar elements are used: the content of particles >10μ (physical sand) in soil samples (γ) and the content of particles <10 μm (physical clay) (Z).…”

Section: Soil Physicsmentioning

confidence: 99%

“…Selection of comparison standard and the calculation of dynamic equilibrium coefficients. In the sampling moment, the sample can occur in one of three possible equilibrium states, at K = 1, K > 1, and K < 1 [10,11]. It is rational to use the "ideal" equilibrium of the PSS with K = 1, which characterizes the dispersivity of the sample in the quasi-static equilibrium state (V/Z = 1 and k 1 k 3 / = 1).…”

Section: Soil Physicsmentioning

confidence: 99%

“…Another thing is less known. The content of physical clay being constant, its mass fractions of clay and silt vary among seasons and years [11,17]. A reversible clay ↔ silt equilibrium is manifested in this case.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of the microaggregate composition of chernozem in relation to changes in the content of organic matter

et al. 2016

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Monitoring of soil dispersivity and humus state has been performed in the stationary profile of ordinary chernozem in the Botanic Garden of the Southern Federal University in 2009-2014. The contents of physical clay and sand are almost stable in time, which indicates a quasi-static (climax) equilibrium in the soil. Another (reversible dynamic) process occurs simultaneously: seasonal and annual variation in the mass fractions of clay and silt in physical clay. Variations of humus content in the whole soil and in its physical clay are also observed on the background of seasonal changes in precipitation and temperature. A procedure has been developed for the analysis of the polydisperse soil system with consideration for the quasi-static and dynamic equilibriums. A two-vector coordinate system has been introduced, which consists of scales for changes in the contents of physical clay and physical sand in 100 g of soil and changes in the fractions of clay and silt in 100 g of physical clay. Co-measurements of two dispersivity series of soil samples-actual dynamic and calculated under quasi-static equilibrium (ideal)-have been performed. Dynamic equilibrium coefficients, which cumulatively reflect the varying proportions of physical clay and physical sand in the soil and the mass fractions of clay and silt in physical clay, have been calculated.

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Section: Resultsmentioning

confidence: 99%

“…Literature data were also used [7,11,19]. Changes in soil dispersivity among the seasons and years were monitored in the Botanic Garden of the Southern Federal University in 2009-2014.…”

Section: Soil Physicsmentioning

confidence: 99%

Section: Soil Physicsmentioning

confidence: 99%

Section: Soil Physicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamics of the microaggregate composition of chernozem in relation to changes in the content of organic matter

et al. 2016

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Copper and zinc adsorption by Chernozems of different textures

Bauer

Пинский

Minkina

et al. 2019

IOP Conf. Ser.: Earth Environ. Sci.

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The dependence of Cu2+ and Zn2+ adsorption by Chernozems of the Rostov region on the soil texture was examined. The thermodynamic parameters of the Langmuir equation (Kl and C∞) were calculated for all the studied samples. According to the adsorption parameters, the metal cations were arranged in the order Cu2+ > Zn2+. The adsorption of the studied heavy metals and the strength of their fixation on the surface of soil particles decreased with a decrease in the percent of the clay fraction in the particle size distribution of the soils. A correlation analysis of the relationships between the adsorption parameters and the contents of particles <0.01 and <0.001 mm in the soil samples showed that the maximum adsorption (C∞) of the metals mainly depends on the particle size, whereas the strength of adsorption is largely controlled by the chemical and mineralogical composition of the soil particles.

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Features of Soil Organic Carbon Transformations in the Southern Area of the East European Plain

Lisetskii,

Buryak,

Marinina

et al. 2023

Geosciences

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The active development of the problems related to the assessment of the role of the pedosphere in global climate change involves the possibility of application of the quantitative determination of soil organic carbon (SOC) as one of the indicators of a climatic response. Here, the authors have summarized the results of their own research over many years (1985–2023), comprising more than 500 determinations of SOC within the area of the Chernozem zone, in the south of the East European Plain (Moldova and Bessarabia, southern Ukraine, southwestern Russia), in the context of regional climate differentiation using evaluations of climatic energy consumption for soil formation. The data were structured for each of the regions through the creation of series of agrogenic soil transformations (virgin land, modern-day ploughed land (<100 years), continually ploughed land (>100 years), fallow land of the modern era (n·10 years), and post-antique long-term fallow land). It has been established, by means of statistical treatment of the data, that the intraregional differentiation of the bioclimatic conditions is the key factor determining the SOC content in the top horizon of soils in the south of the East European Plain. The comparison of the SOC content within the five variants of land use demonstrated that all the regions under study differed, with statistical significance only found in a single type of ‘continually ploughed land’ (>100 years). This fact reflects the leading role of the duration of agrarian loads in agropedogenesis. If the steppe Chernozems even 145 years ago had a SOC content of up to 4%, then the Chernozems in the forest-steppe zone, which used to have habitats with a SOC content of 4–7%, occupied the largest areas, and have now lost 30–40% of the original values in the 0–50 cm layer. Besides the rates of the SOC degradation, which are known and are comprehensively evaluated in the present work, the phenomenon of progradation was established in certain situations, in particular arising during the rotation regime of land use (from ploughing to fallow fields, and vice versa), which stimulated effective mechanisms of reproduction of organic substances. Thus, in one of the ancient agricultural regions, where in antiquity the land was cultivated by such ancient Greek states as Tauric Chersonesos and the European Bosporos in Crimea, post-antique long-term fallow lands possess higher SOC contents than their virgin analogues. It is not justified to consider virgin lands as absolute references for the evaluation of the humus conditions since the analysis of agrogenic series of Chernozems has corroborated an essential role of the soil organo-mineral matrix in the formation of the carbon protection capacity.

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Monitoring changes in soil dispersity and humus content under increasingly arid climate conditions

Cited by 3 publications

References 1 publication

Dynamics of the microaggregate composition of chernozem in relation to changes in the content of organic matter

Dynamics of the microaggregate composition of chernozem in relation to changes in the content of organic matter

Copper and zinc adsorption by Chernozems of different textures

Features of Soil Organic Carbon Transformations in the Southern Area of the East European Plain

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