| 引用本文: | 贺园春,罗纨,贾忠华,等.添加秸秆和石膏改善滨海盐渍土盐分淋洗效果的试验研究[J].灌溉排水学报,2022,(10):-. |
| He Yuan Chun,Luo Wan,Jia Zhong Hua,et al.添加秸秆和石膏改善滨海盐渍土盐分淋洗效果的试验研究[J].灌溉排水学报,2022,(10):-. |
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| 摘要: |
| 摘 要：【目的】探讨添加石膏和秸秆对滨海滩涂盐渍土盐分淋洗效果的改善作用。【方法】采用直径为20 cm，土层深度为60 cm的土柱开展室内试验，设置了对照、添加秸秆、添加石膏以及秸秆+石膏覆盖4种试验处理；土柱饱和后观测了时长为5个淋洗周期（PV）的排水质量浓度变化，每2 L排水取淋洗液测量电导率、pH值和钠钾钙镁离子质量浓度；比较了土壤盐分淋洗过程中及试验结束后土壤ECe和SAR值变化。【结果】①石膏处理和秸秆处理的土壤饱和电导率及交换性钠百分率在淋洗了5个淋洗周期后均达到脱盐标准(ECe= 4.0 dS/m)。②土壤盐分淋洗效果递减次序为石膏+秸秆>石膏>秸秆=对照。【结论】在滨海滩涂盐渍土壤改良过程中，单独添加石膏或同时添加石膏和秸秆均可改善土壤的理化性质；秸秆配合石膏使用对盐分淋洗有促进作用，单独使用则无明显效果。 |
| 关键词: 盐渍土；秸秆；石膏；淋洗；脱盐 |
| DOI： |
| 分类号:S156.4 |
| 基金项目:国家自然科学基金(51979239；52109068)；江苏省水利科技项目(2019040), |
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| Experimental Study on Improving Salt Leaching Effect of Coastal Saline Soil by Adding Straw and Gypsum |
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He Yuan Chun, Luo Wan, Jia Zhong Hua, Zhang Yu, Zhang Da W ei, Ebrahim Yahya Khailah, Lu Pei Rong, Xu Qing
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College of Water Conservancy Science and Engineering,Yangzhou University
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| Abstract: |
| Abstract：【Objective】To explore whether gypsum and straw addition can improving salt leaching effect of the newly reclaimed coastal saline soil. 【Methods】Conducted indoor experiment using soil columns of 20 cm in diameter and 60 cm soil layer, four salt leaching treatments were set up, including control, straw mulching, gypsum mulching and straw and gypsum mulching; After saturating the soil columns, the mass concentration of solution that leached through the soil columns were measured for a time period of draining 5 soil pore volumes. The leaching solution samples taken at interval of every 2L were analyzed for the electric conductivity (ECe), pH value and concentration of sodium, potassium, calcium and magnesium ions; soil ECe and SAR before and after the leaching process were compared.【Results】① The saturated electrical conductivity and sodium adsorption ratio (SAR) of the soil treated with gypsum and straw additives reached the desalination standard (ECe=4.0 ds/m) after 5 pore volume leaching drainage. ② The decreasing order of salt leaching effect was gypsum+straw>gypsum>straw=control.【Conclusion】In the process of saline soil reclamation in coastal tidal flats, the physical and chemical properties of soil can be improved by adding gypsum alone or adding gypsum and straw simultaneously; the combined straw and gypsum additives enhanced the salt leaching effect of the experimental soil, while adding straw alone had no obvious effect during the experiment. |
| Key words: Saline soil; Straw; Gypsum; Leaching; Desalination. |
