Sodification and solodization processes: Pedogenesis or natural soil degradation?

Filho, José de Souza Oliveira; Pinheiro, Carlos Roberto; Pereira, Marcos Gervásio; Valladares, Gustavo Souza; Camara, Rodrigo

doi:10.1016/j.jsames.2020.102909

Cited by 7 publications

(3 citation statements)

References 30 publications

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“…Even solonetz horizons B1 had pH values less than 7.0. This is due to the destruction of the mineral part of the soil as a result of the salinisation, changes in the composition of exchange-absorbed cations and the appearance of hydrogen ions [15]. Soils had relatively small values of cation exchange capacity in A1 horizons (16.0-18.0 mmol/100g), which is associated with a small content of particles smaller than 0.01 mm (16.9-28.7%).…”

Section: Resultsmentioning

confidence: 99%

Saline fertility of fallow land massifs in the steppe zone of the Omsk Priirtyshye region

Azarenko

2023

E3S Web of Conf.

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Information on the properties of unused solonetz on deposits is necessary for studying the processes of their evolution, solving the issues of rational use of agricultural lands, and establishing the possibility of their reintroduction into agricultural turnover. The aim of the research was to study the fertility indicators of solonetz (Gleyic Solonetz) in the steppe zone of Omsk Priirtyshye, which are in the post-agrogenic stage of development. The research was carried out in Cherlak district of Omsk region (south of Western Siberia) on three fallow massifs with the age of less than 10 years; 10-20 years and more than 20 years. A field survey of soil cover and soil analyses were carried out. As a research result, it was established that fallow massifs are represented by the meadow-chernozem solonetz and the chernozem-meadow columnar solonetz of different types with low fertility. The unfavourable properties of solonetz were expressed physical solonetization, high density of illuvial horizons, low porosity, and unfavourable composition of exchange-absorbed cations, alkaline and strongly alkaline environment in the middle and lower parts of profiles, which are aggravated by arid conditions of steppe landscapes. Reintroduction of solonetz into agricultural turnover can be allowed only on arrays with predominance of medium and deep solonetz for cultivation of solonetz-resistant crops under moisture-saving technologies, no-tillage reclamation treatments, and chemical reclamation in the future.

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Section: Resultsmentioning

confidence: 99%

Saline fertility of fallow land massifs in the steppe zone of the Omsk Priirtyshye region

Azarenko

2023

E3S Web of Conf.

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“…Degradation promoted an increase in surface Na + contents. Surprisingly, these contents are much higher than the average values found in natric horizons in the SAB (Brasil, 1972;Oliveira Filho et al, 2020). These levels confi rmed the sodium character (PST ≥ 15%) of the saprolite, whose origin is mainly credited to the weathering of plagioclases (dos Santos et al, 2018).…”

Section: Degradation and Chemical Attributes Of Soilsmentioning

confidence: 91%

Effects of Degradation on Soil Attributes Under Caatinga in the Brazilian Semi-Arid

et al. 2023

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Anthropic activities in their various aspects have promoted soil degradation in the Brazilian semi-arid region (SAB). As a result, significant losses in productivity and in the ability of soils to fulfill their ecological functions have been reported. The present study investigated the effects of degradation on soil attributes and properties under dense (CAD) and sparse (CAE) shrubby Caatinga in Campina Grande, PB, Brazil. Samples from the 0-20 cm layer of soil were investigated via physical (particle size distribution and soil density), chemical (acidity, electrical conductivity, macronutrients, soil organic matter) and microbiological attributes (microbial biomass carbon (C-BMS), basal respiration of the soil (RBS) and metabolic quotient (qCO2) Data were submitted to the Mann-Whitney Test and Principal Component Analysis (PCA). Anthropic actions on the CAE promoted the exposure of the saprolitic layer on the surface. This layer has imperfect drainage, low levels of nutrients and organic matter and high sodicity, which contributes to the slow regeneration of vegetation. Carbon stock and microbial activity are significantly lower in CAE compared to CAD. Degradation resulted in losses of supporting ecosystem services (nutrient cycling and primary production) and regulation (erosion control and climate regulation). The results can be used to understand the dynamics of landscapes of low complexity (high degradation) in the SAB and serve as a framework to find strategies to restore the productive capacity of extensive degraded and/or desertified areas in the SAB.

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“…Soil salinity and alkalinity significantly affects the availability of soil nutrients in Solonetz, leading to complex relationships between soil enzymes, microorganisms and nutrients in different vegetation types [6,7]. Poor soil structure caused by soil excessive exchangeable sodium is one of the key limiting factors for corn production in Northeast China [8].…”

Section: Introductionmentioning

confidence: 99%

Response of Soil Absolute and Specific Enzyme Activities to Long-Term Application of Organic Fertilizer to Solonetz in Northeast China

Liu,

Feng,

et al. 2023

Agronomy

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Soil organic carbon (SOC) and microbial biomass carbon (MBC) are highly correlated with enzyme activities. Specific enzyme activities can exclude the autocorrelation between enzyme activity and SOC and MBC. However, the responses of absolute and specific enzyme activities to saline–alkali properties remains unclear. In this study, the absolute and specific enzyme activities of cellobiose hydrolase, β-glucosidase, arylsulfatase, alkaline phosphatase, and urease were measured in soils with 10, 15, 18, 21, and 26 years of organic fertilizer application in contrast to soils without organic fertilizer application. The results showed that long-term organic fertilizer application led to significantly increased in the absolute and specific enzyme activity and decrease in pH, electrical conductivity (EC), exchangeable sodium percentage (ESP), as well as sodium adsorption ratio (SAR5:1). In the structural equation model (SEM), the EC extremely limited the geometric mean of specific enzyme activity per unit of MBC (MBC-GMSEA) (path coefficient, −0.84, p < 0.001). Pearson’s correlation analysis showed that the correlations between EA/MBC and pH, EC, ESP, and SAR5:1 were higher than between the absolute soil enzyme activity and pH, EC, ESP, and SAR5:1. Of the parameters tested, EA/MBC was a more sensitive index to reflect the improvement effect of organic fertilizer on soils and evaluate the saline–alkali barrier.

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Sodification and solodization processes: Pedogenesis or natural soil degradation?

Cited by 7 publications

References 30 publications

Saline fertility of fallow land massifs in the steppe zone of the Omsk Priirtyshye region

Saline fertility of fallow land massifs in the steppe zone of the Omsk Priirtyshye region

Effects of Degradation on Soil Attributes Under Caatinga in the Brazilian Semi-Arid

Response of Soil Absolute and Specific Enzyme Activities to Long-Term Application of Organic Fertilizer to Solonetz in Northeast China

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