Application of flue gas desulfurization gypsum improves multiple functions of saline-sodic soils across China

Wang, Yugang; Wang, Zhufeng; Liang, Feng; Jing, Xin; Feng, Wenjie

doi:10.1016/j.chemosphere.2021.130345

Cited by 47 publications

(23 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a low‐cost and abundant source of Ca, flue gas desulfurization (FGD) gypsum has become a common saline‐sodic soil ameliorant to provide Ca 2+ , which replaces exchangeable Na + and reacts with CO 3 2− and HCO 3 − (Watts & Dick, 2014). As reported by Wang et al (2021), FGD gypsum application in saline‐sodic soils in China significantly reduced the soil exchangeable sodium percentage (ESP) and pH by at least 27.8% and 6.4%, respectively, and subsequently increased crop yields by at least 68.7%. Nevertheless, most previous experiments were carried out in relatively limited areas that were well managed and controlled.…”

Section: Introductionmentioning

confidence: 57%

“…A decrease in exchangeable Na + concentration significantly improves formation of soil microaggregates and soil structure, thus improving soil aeration conditions and facilitating the respiration of crop roots and aerobic microorganisms (Luo et al, 2018; Wang et al, 2021). Moreover, a reduced soil sodicity enhances the movement of nutrients through the soil, thus promoting crop growth (Zhang et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

“…Nevertheless, most previous experiments were carried out in relatively limited areas that were well managed and controlled. The results always indicated a large sodicity reduction and high yield (Wang et al, 2021; Zhao et al, 2018). In reality, spatial variability in the salinity and sodicity of large‐scale saline‐sodic lands occurs because of different soil characteristics, topography, water quality, and meteorological conditions.…”

Section: Introductionmentioning

confidence: 98%

“…The application of calcium (Ca) has been considered a useful practice to reduce soil sodicity parameters worldwide (Wang et al, 2021). As a low‐cost and abundant source of Ca, flue gas desulfurization (FGD) gypsum has become a common saline‐sodic soil ameliorant to provide Ca 2+ , which replaces exchangeable Na + and reacts with CO 3 2− and HCO 3 − (Watts & Dick, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The application of calcium (Ca) has been considered a useful practice to reduce soil sodicity parameters worldwide (Wang et al, 2021) Zhao et al, 2018). In reality, spatial variability in the salinity and sodicity of large-scale saline-sodic lands occurs because of different soil characteristics, topography, water quality, and meteorological conditions.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

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

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 57%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

View full text Add to dashboard Cite

show abstract

Hydrochar Utilization for Saline‐Alkali Soil Amelioration and Its Carbon Sequestration Potential Assessment

Shen,

Jiang,

Tang

et al. 2024

Advanced Sustainable Systems

View full text Add to dashboard Cite

For the current situation of saline‐alkali soil amelioration, it is urgent to explore a multi‐objective amelioration strategy involving crop income increase and environmental benefits. This study used pine‐needle hydrochar to ameliorate saline‐alkali soil and conducted column and pot experiments to investigate its effects on soil properties and crop growth. And the environmental advantages of hydrochar are evaluated through Life Cycle Assessment (LCA). The electrical conductivity, exchangeable sodium percentage, and pH of saline‐alkali soil ameliorated with hydrochar using the column elution method are reduced by 60%, 58%, and 1.2 pH units, respectively, compared to the original soil. Also, the gene copy number of the ameliorated soil has doubled according to qPCR determination. Pot experiment results show that the root length, fresh weight, and germination rate of wheatgrass are increased by 107, 75, and 20%, respectively. These results demonstrated that the exchange of Na+ with H+ released from hydrochar reduced the soil alkalinity and the viability of organisms is enhanced. Moreover, based on this study's data including the hydrochar dosage and wheatgrass yield, the LCA results showed 3.7 × 109 t CO2e carbon sequestration potential and significant environmental benefits.

show abstract

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

View full text Add to dashboard Cite

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.

show abstract

Application of flue gas desulfurization gypsum improves multiple functions of saline-sodic soils across China

Cited by 47 publications

References 31 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

Hydrochar Utilization for Saline‐Alkali Soil Amelioration and Its Carbon Sequestration Potential Assessment

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

Contact Info

Product

Resources

About