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【目的】研究滴灌条件下种植盐生植物对盐渍化土壤的脱盐效果。【方法】在滴灌条件下种植盐生植物海蓬子和盐地碱蓬。【结果】盐生植物对耕作层土壤特别是0～20 cm土壤盐分影响显著,可有效降低土壤总盐含量以及盐分离子Na+、Cl-和K+浓度,但对土壤pH值影响不明显。种植盐地碱蓬的土壤总盐量下降幅度要高于海蓬子;种植盐地碱蓬土壤Na+、K+的含量下降较明显,而种植海蓬子土壤的Cl-含量明显降低。【结论】滴灌抑盐+生物脱盐模式在改良盐渍化土壤中效果明显,盐地碱蓬可作为较理想的脱盐植物,对于盐渍化土壤的开发利用具有一定的指导意义。
【Objective】 The purpose of this study was to investigate the desalination effect of halophytes on salinized soils under drip irrigation. 【Method】 Halophytes of Halophytes and Suaeda salsa were planted under drip irrigation. 【Result】 Halophytes had a significant effect on soil salinity in tillage soil, especially in 0-20 cm soil layer, which could effectively reduce soil total salt content and salt ion Na +, Cl- and K + concentrations, but had no obvious effect on soil pH. The total amount of soil salinities of Suaeda salsa dropped more significantly than that of Phlox japonicus. The content of Na + and K + in Suaeda salsa soil decreased more obviously while the content of Cl- in the soil of Salix psammophila significantly decreased. 【Conclusion】 The results show that the salt-suppressing + biological desalting mode is effective in improving salinized soils. Suaeda salsa can be regarded as an ideal desalination plant, which is of guiding significance for the development and utilization of salinized soils.