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| 三种材料复合施用对盐碱土壤改良效果的研究 |
| Improvement of saline-alkali soil by compound application of three environmental materials |
| 投稿时间：2019-09-07 |
| DOI：10.13254/j.jare.2019.0447 |
| 中文关键词: 盐碱土壤，pH，钠吸附比(SAR)，水溶性盐含量，复合材料 |
| 英文关键词: saline-alkali soil, pH, sodium adsorption ratio(SAR), water soluble salt content, composite materials |
| 基金项目:国家自然科学基金（41571303）；天津市宁河区盐碱地土壤化学改良技术方法应用研究（HK2019-B2） |
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| 中文摘要: |
| 为研发对盐碱土壤脱盐和对土壤结构具有同步改良效应的复合改良材料，选取脱硫石膏（A）、改性腐植酸（B）和高分子材料（C），通过室内土柱模拟方法，采用正交试验设计，探究三种材料对盐碱土壤盐分淋洗和结构改良同步增效的最优组合，分析不同材料对盐碱土壤的改良机理。结果表明：三种材料复合施用对盐碱土壤盐分淋洗和结构改良有明显效果，对盐碱土壤改良效果最优的组合为A3B1C3（脱硫石膏、改性腐植酸、高分子材料的添加量分别为60、2、0.1 g·kg-1），与对照（CK）相比，其淋溶液体积减少了14.22%，土壤钠吸附比（SAR）降低了30.43%，土壤团聚体含量增加24.45个百分点。研究表明，三种材料复合施用能够在改良盐碱土壤化学性质的同时改良盐碱土壤结构。 |
| 英文摘要: |
| The aim of the present study was to develop composite materials with a simultaneous effect of desalination and improvement of the soil structure of saline-alkali soil using a soil column simulation test. To this end, the optimal combination of desulfurized gypsum (A), modified humic acid (B), and polymer material (C) was explored using an orthogonal experimental design. The improvement mechanism of different materials on saline-alkali soil was analyzed. The results showed that the three composite materials had significant effects on the desalination and structural improvement of the saline-alkali soil. The optimal combination was A3B1C3, and the amounts of A, B, and C were 60, 2 and 0.1 g·kg-1, respectively. Compared with the control, the volume of the leaching solution was reduced by 14.22% and the ratio of soil sodium adsorption was reduced by 30.43%. Moreover, the content of soil aggregates increased by 24.45 percent point. In conclusion, the application of the three composite materials could improve the chemical properties and structure of the saline-alkali soil. |
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