Inorganic improver and straw returning promote corn growth and improve the quality of saline soils

Jipeng Wang, Junchuan Huang, Xinyu Hou, Quangang Yang, Hong Pan, Hui Wang, Fei Han, Yanhong Lou and Yuping Zhuge
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Jipeng Wang: National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Daizong Road, Tai'an City, Shandong, P.R. China
Junchuan Huang: National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Daizong Road, Tai'an City, Shandong, P.R. China
Xinyu Hou: National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Daizong Road, Tai'an City, Shandong, P.R. China
Quangang Yang: National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Daizong Road, Tai'an City, Shandong, P.R. China
Hong Pan: National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Daizong Road, Tai'an City, Shandong, P.R. China
Hui Wang: National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Daizong Road, Tai'an City, Shandong, P.R. China
Fei Han: National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Daizong Road, Tai'an City, Shandong, P.R. China
Yanhong Lou: National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Daizong Road, Tai'an City, Shandong, P.R. China
Yuping Zhuge: National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Daizong Road, Tai'an City, Shandong, P.R. China

Plant, Soil and Environment, 2025, vol. 71, issue 3, 232-247

Abstract: Soil salinisation is a major constraint on food security and agricultural development, and remains a critical concern in the agricultural sector. In this study, we examined the effects of three straw return methods - straw mulching, straw burial, and a combination of straw mulching and burial - along with inorganic amendments (CaSiO3 and MgSO4) on maize growth, soil organic matter, bulk density, salinity, and the contents of individual salt base ions. A 120-day planting experiment was conducted using soil columns and included maize cultivation under irrigation and drenching conditions. The combined treatments (straw return with Ca-Mg application) were more effective in reducing salinity and improving soil properties than straw return alone. Na+, K+, Cl-, and HCO3 contents, as well as soil bulk density, decreased by 45.99-48.43, 28.07-28.36, 20.91-24.17, 18.93-21.03, and 7.64-8.40%, respectively. Regarding crop growth promotion, compared with the single treatment, the combined application of straw return with Ca-Mg (PI, SPI) resulted in a 6.46-8.30% increase in superoxide dismutase activity, an 8.66-10.83% reduction in malondialdehyde content, a 12.71-22.70% increase in total root length, a 13.41-24.14% increase in root surface area, and a 12.46-19.02% increase in root volume. Taken together, integrating straw return with a calcium-magnesium mixture represents a promising strategy for improving the quality of coastal saline soils.

Keywords: abiotic stress; soil quality; desalination; soil salt reduction; soil modification (search for similar items in EconPapers)
Date: 2025
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DOI: 10.17221/35/2025-PSE

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