| 引用本文: | 尹 芳,董兴芝,张文波,等.咸水滴灌下秸秆隔层类型对盐渍土淋洗效果的影响[J].灌溉排水学报,2026,45(6):130-138. |
| YIN Fang,DONG Xingzhi,ZHANG Wenbo,et al.咸水滴灌下秸秆隔层类型对盐渍土淋洗效果的影响[J].灌溉排水学报,2026,45(6):130-138. |
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| 摘要: |
| 【目的】土壤盐渍化和淡水资源紧缺是制约全球农业发展和植被构建的关键因素。为了探索利用高矿化度咸水替代淡水用于改良盐渍土的有效性及配套隔层类型。【方法】采用土柱试验，设置无隔层、秸秆单隔层（埋深20 cm，厚5 cm）和等量秸秆双隔层（埋深20、40 cm，厚2.5 cm）3种隔层类型，以及淡水（0.3 g/L）灌溉500 mm（FF）和咸（21.8 g/L，254 mm）淡（246 mm）轮灌（SF）2种灌溉模式处理，分析不同处理灌溉淋洗后土壤水盐动态特征和1 a后返盐情况。【结果】所有处理在0~40 cm土层出现明显脱盐，FF灌溉模式下，无隔层、单隔层、双隔层淋洗后土壤脱盐率（SDRL）分别为90.9%、89.0%、78.8%，1 a后返盐率（SRR）分别为432.9%、139.3%、53.8%，最终土壤脱盐率（SDRF）分别为42.0%、71.6%、66.9%；SF灌溉模式下，无隔层、单隔层和双隔层SDRL分别为77.7%、78.6%、76.1%，1 a后SRR分别为185.4%、44.8%、53.7%，SDRF分别为35.1%、68.9%、62.1%。【结论】综上，无隔层和单隔层处理淋盐效果最佳，设置单、双隔层处理抑制返盐效果更好，FF、SF灌溉模式下单隔层处理时淋盐和抑制返盐综合效果最佳。本研究可为盐碱地改良与水资源高效利用提供理论依据和技术参考。 |
| 关键词: 秸秆隔层；咸淡水交替灌溉；水盐运移；脱盐效率；盐碱地改良 |
| DOI：10.13522/j.cnki.ggps.2026047 |
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| Effect of straw interlayers on salt leaching in saline-alkali soils under saline water drip irrigation |
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YIN Fang, DONG Xingzhi, ZHANG Wenbo, ZHAO Song, TANG Guangmu, XU Wanli, FENG Di
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1. Xinjiang University College of Ecology and Environment, Urumqi 830017, China;
2. Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumchi 830091, China;
3. Resource and Environment College of Xinjiang Agricultural University, Urumqi 830052, China;
4. Tianjin Agricultural University College of Hydraulic Engineering, Tianjin 300392, China
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| Abstract: |
| 【Objective】Using saline water as a supplementary irrigation resource is a mitigation strategy to safeguard agricultural production and vegetation restoration in regions facing soil salinization and freshwater scarcity. However, how to safely use saline water remains a major challenge. We investigated the efficacy of straw layering (straw return stratification) on salt leaching in saline-alkali soil under drip irrigation.【Method】The experiment was conducted using soil columns and consisted of three straw treatments: no stratification, a single stratification with a straw layer 5 cm thickness buried at the depth of 20 cm, and double stratification with straw layers of 2.5 cm thickness buried at depths of 20 cm and 40 cm; each straw treatment had two irrigation treatments: freshwater irrigation (0.3 g/L, 500 mm; FF) and alternating saline-freshwater irrigation (254 mm saline water + 246 mm freshwater; SF). During the experiment, we measured soil water and salt distribution immediately after the irrigation and one year after the irrigation.【Result】All treatments resulted in a significant desalination in the 0-40 cm soil layer. Soil desalination rate after leaching (SDRL) in the FF treatment was 90.9%, 78.6% and 76.1% for no stratification, single stratification and double stratification, respectively; their associated salt return rate (SRR) after one year was 432.9%, 47.9% and 14.5%, and final soil desalination rate (SDRF) was 42.0%, 68.2%, and 71.7%, respectively. The SDRL in SF was 77.7%, 89.0% and 78.8% for no stratification, single stratification and double stratification, and their associated SRR values were 185.4%, 162.7%, and 76.3%, and SDRF be 35.1%, 68.9%, and 62.1%, respectively.【Conclusion】The combination of single straw stratification and alternating saline-freshwater irrigation was most effective for salt leaching and salt return suppression. The combination of double straw stratification and alternating saline-freshwater irrigation showed superior performance in water retention and long-term soil desalination, effectively reducing salt accumulation while maintaining soil structure stability. These results provide valuable insights for saline-alkali soil improvement and efficient utilization of water resources. |
| Key words: straw interlayer; alternating saline-freshwater irrigation; water-salt movement; desalination efficiency; saline-alkali soil improvement |
