Soil salinity and sodicity changes after a one‐time application of flue gas desulphurization gypsum to paddy fields

Zhang, Wenchao; Zhao, Yonggan; Wang, Shujuan; Li, Yan; Zhuo, Yuqun; Liu, Jia

doi:10.1002/ldr.4025

Cited by 14 publications

(13 citation statements)

References 37 publications

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“…This contrasts with the circumstances of soils with a high sodicity where it is difficult to harvest any rice without reclamation (Zhao et al, 2018). The improved rice yields could be attributed to decreases in soil Na + , CO 3 2− and HCO 3 − levels resulting from the addition of FGD gypsum (Chi et al, 2012; Zhang et al, 2021).…”

Section: Resultsmentioning

confidence: 99%

“…Due to the low solubility of FGD gypsum, the corresponding reclamation process exhibits a long-term (at least 7 years) performance, and the improvement depth is less than 40 cm (Zhang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Due to the low solubility of FGD gypsum, the corresponding reclamation process exhibits a long‐term (at least 7 years) performance, and the improvement depth is less than 40 cm (Zhang et al, 2021). Generally, FGD gypsum exerts significant reclamation effects in the first year of application, and the reclamation effect can increase year by year over at least 4 years of FGD gypsum application (Zhang et al, 2021; Zhao et al, 2018). As such, the reclamation effect of the application of FGD gypsum on saline‐sodic topsoil is typically evaluated in the year of application.…”

Section: Introductionmentioning

confidence: 99%

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Practical application of high‐sodicity wasteland reclamation with flue gas desulfurization gypsum in the Songnen Plain of China

Zhang

Zhao

et al. 2022

Land Degrad Dev

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Based on global food supply demands and the need for sustainable development, it is necessary to rapidly reclaim saline‐sodic wasteland as productive land on a large scale. However, the large‐scale application of flue gas desulfurization (FGD) gypsum for the reclamation of high‐sodicity wasteland to obtain productive fields still lacks quick and concise evaluation indicators. Therefore, four FGD gypsum reclamation practices were applied in high sodicity‐affected wastelands. After 6 months, the topsoil (0–20 cm) pH, exchangeable sodium percentage (ESP), sodium adsorption ratio (SAR), electrical conductivity (EC), and paddy rice yield were evaluated. During the rice harvest, the topsoil pH, ESP, and SAR significantly decreased by 0.9–1.9 units, 29.3–67.2% and 2.3–53.7 (mmolc L−1)1/2, respectively, below initial values. Across the application sites, the interquartile range of the rice yield ranged from 1.7 to 5.8 Mg ha−1 with a median yield of 3.7 Mg ha−1. Correlation analysis between the rice yield and topsoil chemical parameters indicated that the soil pH was the primary factor of rice yield reduction, followed by ESP and SAR. To achieve a median yield, we propose that the pH, ESP and SAR of reclaimed topsoil should be lower than 8.7, 27.5%, and 8.5 (mmolc L−1)1/2, respectively, during the first season. This study provides a practical template and reference values for the salinity and sodicity of topsoil when reclaiming high sodicity‐affected wastelands via large‐scale FGD gypsum application.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Practical application of high‐sodicity wasteland reclamation with flue gas desulfurization gypsum in the Songnen Plain of China

Zhang

Zhao

et al. 2022

Land Degrad Dev

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“…If irrigation water is safe for soil and crops, then soil sodicity reclamation is principally a single-time investment for sustaining production (Rai et al, 2021b). Usually, 3-4 years are required after the adoption of reclamation technology for ricebased cropping systems to reach their productivity potential because of the gradual replacement of a large amount of Na + from soil colloids by Ca 2+ during the progress of reclamation (Abrol and Bhumbla, 1979;Zhang et al, 2021). When sodicity is a consequence of water-born alkalinity, then recurring applications of amendments are advocated to overcome water-born sodicity (residual alkalinity) and maintain soil quality and sustainable crop yield Sheoran et al, 2021).…”

Section: Soil Quality Improvement Under Different Rehabilitation Appr...mentioning

confidence: 99%

“…Paddy straw mulch and efficient water management had the potential for restoring soil health, checking evaporation, and improving crop productivity (Purakayastha et al, 2019;Soni et al, 2021) (Supplementary Table S2). These practices permit water to move more quickly into and through the soil profile, increasing salt leaching and inhibiting salt build-up in surface soil (Grigg et al, 2006;Yuan et al, 2019;Zhang et al, 2021). Therefore, the DI and mulching synergized with the climate and soil of a geographical area can be a nature-based solution working within the limits of the existing natural resources (Visser et al, 2019;Soni et al, 2021).…”

Section: Soil Quality Improvement Under Different Rehabilitation Appr...mentioning

confidence: 99%

Assessing soil quality for rehabilitation of salt-affected agroecosystem: A comprehensive review

Basak

Kumar

Sundha

et al. 2022

Front. Environ. Sci.

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One billion hectares of land worldwide is affected by several kinds of salinity and associated problems. The soil quality (SQ) in salt-affected soil (SAS) is impaired because of the presence of excess electrolytes, disproportionate Na and Ca in soil solution and exchange phase, rhythmic changes in the hydrological cycle, decreasing soil organic matter, poor vegetative cover, low soil biological activity, and crop residue return. Sodic and saline–sodic soils have the potential to provide alkaline reactions and soil physical constraints to regulate the soil attributes affecting SQ. Because of high spatial variability and rapid temporal changes, selection of simple, robust, low cost, and high-throughput master indicators for assessing SQ is very essential for monitoring the aggradation or degradation of SAS. Therefore, screening the master indicators for developing a minimum dataset for SQ assessment of SAS is an important issue for sustainable management of soil in these agro-ecologies. We captured the SQ indicators for SAS from several ecosystems of different countries and discussed the problems of parameterization for assessing SQ. Improved SQ for optimum soil functioning is needed for confirming agricultural productivity and food security around the globe. This review describes the causes and drivers for sodification/salinization and mechanism-oriented rehabilitation options such as the application of mineral gypsum, flue-gas–desulfurized gypsum, elemental S, acidified biochar, polymer, salt tolerance mechanisms, and other agro-techniques for improving the quality of SAS. Based on the SQ assessment, a suite of site-specific soil management practices are advocated for the greening of SAS and prosperity.

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Water regime enhances the effects of flue gas desulfurization gypsum on the reclamation of highly saline‐sodic soil

Zhang

Zhao

et al. 2022

Land Degrad Dev

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Flue gas desulfurization (FGD) gypsum-based reclamation of saline-sodic soil has been widely used in the Songnen Plain of China, but its reclamation effect depends on the water regime. A pot experiment was conducted to identify the optimal water regimes for reclaiming a highly saline-sodic soil [pH, electrical conductivity (EC) and exchangeable sodium percentage (ESP) were 10.4, 5.5 dS m-1 and 68.1%, respectively] by using FGD gypsum. Three water regimes with drainage times [irrigation amounts of 3-, 5-, and 7-times the soil pore volume (PV)] were selected and FGD gypsum was added to a portion of the regimes before the final drainage operation.Then the saline-sodic parameters of drainage and soil were measured and analyzed. Na + , Cl À , HCO 3 À , and SO 4 2À were the main ions in the drainage of all the treatments.With the increase in drainage times, the water regime without FGD gypsum notably decreased soil EC by 17.8%-52.0%. In contrast to the FGD gypsum treatment, the water regime failed to decrease the soil ESP. FGD gypsum application with three drainage times had optimal reclamation with reductions in soil pH and ESP of 0.5-2.3 units and 5.1%-20.1%, respectivley. But the associated water consumption was more than 40% higher than that of one-or two-drainage operations. In terms of water reduction (irrigation volume was 5 times PV), sodicity reduction and salt removal (soil pH, ESP, and EC were reduced by 1.7 units, 12.3%, and 1.12 dS m À1 ), FGD gypsum application with two-time drainage could be a more suitable measure to reclaim highly saline-sodic soil.

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Soil salinity and sodicity changes after a one‐time application of flue gas desulphurization gypsum to paddy fields

Cited by 14 publications

References 37 publications

Practical application of high‐sodicity wasteland reclamation with flue gas desulfurization gypsum in the Songnen Plain of China

Practical application of high‐sodicity wasteland reclamation with flue gas desulfurization gypsum in the Songnen Plain of China

Assessing soil quality for rehabilitation of salt-affected agroecosystem: A comprehensive review

Water regime enhances the effects of flue gas desulfurization gypsum on the reclamation of highly saline‐sodic soil

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