Variation in the acid-base parameters of automorphic loamy soils in the taiga and tundra zones of the Komi Republic

Шамрикова, Е. В.; Kazakov, Vladimir G.; Соколова, Т. А.

doi:10.1134/s1064229311060111

Cited by 10 publications

(3 citation statements)

References 2 publications

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“…On arable soils when field crops are harvested and so largely excluded from nature's cycle, the source of organic matter is the aboveground and root residues of cultivated plants, as well as the organic fertilizers used [18]. The intensity of the processes of microbiological decomposition of plant residues in the soil depends on the environmental conditions, including the presence of mineral elements, humidity, temperature, degree of aeration, biological activity and physical-chemical soil properties, and above all, the composition of plant residues.…”

Section: Organic Fertilizers and Humatesmentioning

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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Section: Organic Fertilizers and Humatesmentioning

confidence: 99%

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

et al. 2023

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“…However, the ionization and dissociation constants of these constituents and functional groups are close to each other [28], and most titration approaches cannot identify individual soil components due to the low resolution of titration curves and imperfect algorithms [29]. Thus, titration provides integral parameters only, such as total acid-base buffer capacity [14,[30][31][32][33][34] or buffering intensities [28,[35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Fast High-Resolution pKa Spectrotitrimetry for Quantification of Surface Functional Groups of Retisols

Matveeva,

Garmash,

Shishkin

et al. 2024

Soil Systems

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Potentiometric titration in a fast and simultaneously high-resolution modality was proposed for the identification and quantification of protolytic groups of variable strength at the surface of primary soil particles. The method is implemented by titrimetric data processing as multicomponent spectra (pKa spectrotitrimetry). Due to the high resolution, the error of acidity-constant assessment (3–5%) is lower, compared to existing approaches; due to the fast titration, the effect of soil hydrolysis is minimized. The soil profiles for acidic Retisols (podzolic soils)—under a spruce crown and in the intercrown space—were studied. These soils, which have similar bulk properties and genesis but developed under different plant covers, were distinguished by pKa spectral features at 4–5; 5.5–6.5; 6.5–8.5; 7.5–8.5; and 9–10, as well as total group concentrations. Differences in acidic and basic-group distribution (carboxyl groups, amorphous aluminosilicates, carbonate species, amino groups, soluble (poly)phenolic compounds, phospholipids) and Al and Fe complex compounds within the same soil profiles and between two Retisols were found and quantified. The acidity constants and group concentrations found by pKa spectrotitrimetry were compared with conventional soil-composition indicators (total organic carbon, oxalate-soluble Fe and Al, and phosphorus), using principal component analysis. The main correlations are between the concentrations of oxalate-soluble Al and groups with pKa values of 5.0–6.5 and 8.5; oxalate-soluble Fe and pKa values of 9.0–10.0; and P2O5 and pKa values of 4.0–6.0 and 6.5–8.5. The method provides a set of major acidity values without a priori information on a soil sample and can be used for screening and identifying similar soils.

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“…The study of protolytic equilibria in complex natural systems, such as soils [3,4], their particle size fractions [5], humic substances [6,7], bottom sediments [8], wine [9,10], coals [11], and organic compounds mixtures [12][13][14] is performed by the potentiometric method. Potentiometric titration is widely used in analytical chemistry to determine the concentration of substances in solutions.…”

Section: Introductionmentioning

confidence: 99%

Use of the pK Spectroscopy Method in the Study of Protolytic Properties of Humic Substances and Other Soil Polyelectrolytes

Лодыгин

Шамрикова

2021

Agronomy

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A common technique for the potentiometric analysis of complex protolytic systems is mathematical data processing. This approach allows for transforming the experimental titration curve into a function of the ionogenic group distribution of the titrated object by the values of the pK (−lgKa) acid dissociation. This distribution function is called the pK spectrum, and the approach itself is called pK spectroscopy. In this case, solutions are found not in the form of discrete dissociation constants but as a distribution function of the concentrations of ionogenic groups over a continuous spectrum of dissociation constants. The purpose of this work is to test the possibility of using the pK spectroscopy method for assessing the acid–base properties of humic substances, water-soluble fraction, and soils. The results of testing the pK spectroscopy method showed that this method is expressive and more informative than the traditional method of continuous potentiometric titration. The use of the pK spectroscopy method for studying the protolytic properties of humic substances and other environmental objects is justified. The content and values of pK of ionogenic groups of fulvic acids, water-soluble fraction, and soil suspensions were determined. In the objects, the presence of three to five ionogenic groups with pK values from 3.2 to 9.6 was revealed.

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Variation in the acid-base parameters of automorphic loamy soils in the taiga and tundra zones of the Komi Republic

Cited by 10 publications

References 2 publications

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

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

Fast High-Resolution pKa Spectrotitrimetry for Quantification of Surface Functional Groups of Retisols

Use of the pK Spectroscopy Method in the Study of Protolytic Properties of Humic Substances and Other Soil Polyelectrolytes

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