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| Effects of calcium-based soil conditioner on acidified-salinized soil improvement and cucumber growth |
| Received:May 12, 2025 |
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| KeyWord:calcium-based soil conditioner;acidified salinized soil;correlation analysis;cucumber;soil quality index |
| Author Name | Affiliation | E-mail | | WANG Jiahui | National Engineering Research Conter for Efficient Utilization of Soil and Fertilizer Resoufrces, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China | | | SHI Yixun | National Engineering Research Conter for Efficient Utilization of Soil and Fertilizer Resoufrces, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China | | | SUN Cun | National Engineering Research Conter for Efficient Utilization of Soil and Fertilizer Resoufrces, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China | | | LI Hui | National Engineering Research Conter for Efficient Utilization of Soil and Fertilizer Resoufrces, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China | | | SONG Jingchen | National Engineering Research Conter for Efficient Utilization of Soil and Fertilizer Resoufrces, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China | | | LIU Wen | Weifang Goer Farm Co., Ltd., Weifang 262100, China | | | BU Guoxiang | Weifang Goer Farm Co., Ltd., Weifang 262100, China | | | WANG Hongbin | Weifang Goer Farm Co., Ltd., Weifang 262100, China | | | LI Shuyan | National Engineering Research Conter for Efficient Utilization of Soil and Fertilizer Resoufrces, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China | lishuyan@sdau.edu.cn | | SHI Lianhui | National Engineering Research Conter for Efficient Utilization of Soil and Fertilizer Resoufrces, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China | shilh@sdau.edu.cn |
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| Abstract: |
| This study systematically evaluated the effects of calcium-based soil conditioners on soil improvement and cucumber growth and resistance in the acidified saline soil of Lanling County, Linyi City. Their key improvement mechanisms and the optimal application rate were determined through physical, chemical and biological indicators and correlation analyses. Treatment without any soil amendment was served as control（CK）. Additionally, four treatments with different dosages of calcium-based soil amendment were set up, namely 3 t·hm-2（T1）, 6 t·hm-2（T2）, 12 t·hm-2（T3） and 18 t·hm-2（T4）. Adding calcium-based soil amendments alleviated soil acidification and significantly reduced soil bulk weight, total soil salinity, soil salt accumulation and sodium adsorption ratio. Compared with CK, T3 and T4 treatments significantly increased the cucumber yield by 46.74% and 42.80%, respectively. The calcium-based amendment improved the soil aggregates, average mass diameter of aggregates, microbial biomass carbon and nitrogen, calcium and magnesium ions, plant height, stem thickness, leaf area, root length, root thickness, above-ground and below-ground biomass, root vigor, chlorophyll, and vitamin C of cucumber. The addition of calcium-based amendments increased the resistance of cucumber plants, as a result of attenuated superoxide dismutase and catalase activities. Compared with T1, the soil quality indexes in T3 and T4 were enhanced by 162.79% and 186.89%, respectively. In addition, Mantel Test and Pearson correlation analyses revealed that the key to enhance soil ecological function and cucumber quality with calcium-based amendments lied in reducing salinity and optimizing the supply of nutrients such as calcium, magnesium and potassium. In conclusion, T3 and T4 treatments exhibited significantly higher soil quality indexes, cucumber yields, and stress resistance compared to other treatments. Thus, calcium-based soil conditioner effectively remediate acidified saline soil with an optimal addition of 12-18 t·hm-2, achieving the most pronounced improvement in soil quality index. |
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