| Cite this article: | 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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| 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. |
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