| 引用本文: | 樊丽琴,沈婧丽,王 旭.微咸水-改良材料协同调控对碱化土壤水盐运移的影响[J].灌溉排水学报,2023,42(S1):65-69. |
| FAN Liqin,SHEN Jingli,WANG Xu.微咸水-改良材料协同调控对碱化土壤水盐运移的影响[J].灌溉排水学报,2023,42(S1):65-69. |
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| 摘要: |
| 【目的】探索微咸水-改良材料协同调控对碱化土壤水盐运移的影响。【方法】基于一维垂直土柱入渗试验研究不同微咸水淋洗结合不同改良材料对碱化土壤水盐运移的影响。【结果】水分入渗速率和累积入渗量表现为“磷石膏”处理最大，随着淋洗水矿化度的增加，累积入渗水量和湿润锋推进深度呈增加趋势，但各处理间的差异变小。与其他处理相比，“磷石膏”和“硫酸亚铁+柠檬酸”处理在1.2 g/L矿化度水淋洗条件下可显著降低0~40 cm土层的土壤全盐量，但在3.6 g/L矿化度水淋洗条件下则会增加上层土壤盐分量。1.2 g/L和2.4 g/L矿化度水淋洗条件下，“磷石膏”处理显著降低了0~30 cm土层的土壤Na+、Cl-、HCO3-+CO32-等有害盐分离子量，而在3.6 g/L矿化度水淋洗下，“硫酸亚铁+柠檬酸”处理在降低0~30 cm土层的HCO3-+CO32-、Na+量以及10~20 cm土层的HCO3-+CO32-量方面的效果更好。“柠檬酸+磷酸亚铁”和“磷石膏”处理在降低0~10 cm土层的土壤pH值方面的效果相当，但“磷石膏”处理在降低0~30 cm土层的土壤pH值方面的效果更显著。【结论】对于银北灌区碱化土壤，在低矿化度水淋洗条件下，可施用磷石膏进行土壤改良，在高矿化度水淋洗条件下，“磷石膏”和“硫酸亚铁+柠檬酸”的结合施用效果更好。 |
| 关键词: 微咸水；改良材料；碱化土壤；土壤全盐量；盐分离子；土壤pH值 |
| DOI：10.13522/j.cnki.ggps.2023004 |
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| Effect of Synergistic Regulation with Brackish Water and Improvement Material on Water and Salt Transport in Alkaline Soil |
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FAN Liqin, SHEN Jingli, WANG Xu
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Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China
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| Abstract: |
| 【Background】The shortage of fresh water resources and soil salinization are two major factors restricting agricultural sustainable utilization of saline-alkali land in Yinbei Irrigation District of Ningxia. 【Objective】The Coordinated Regulation on brackish water irrigation and improved materials is an effective way to improve alkaline soil under the background of water shortage. 【Method】Through the one-dimensional vertical soil column infiltration test, the effect of combined different brackish water and different improvement material on water and salt transport in alkaline soil was studied. 【Result】①the water infiltration rate and the cumulative infiltration water amount is the largest in the “phosphogypsum” treatment. The differences between treatments became smaller with the salinity increase of leaching water ②under the leaching water with 1.2 g/L salinity, compared with the control, the total salt content in 0-40 cm soil layer of “phosphogypsum” and “ferrous sulfate + citric acid” treatment was significantly decreased by 31.70% and 30.69%, respectively, but under the leaching water with 3.6 g/L salinity, the two treatment would increase salinity of the upper soil. ③The content of Na+ , Cl-, HCO3-+CO32- in 0-30 cm soil layer of “phosphogypsum” treatment was significantly decreased under the leaching water with 1.2 g/L and 2.4 g/L salinity, but with the salinity increase of leaching water, the leaching effect of Na+ and Cl- decreased, and SO42- content increased. Under the leaching water with 3.6 g/L salinity, the “ferrous sulfate + citric acid” treatment had a better effect on decresing the content of HCO3-+CO32- amd Na+ in 0-30 cm soil layer , and the content of HCO3-+CO32- in 10-20 cm soil layer. ④the “ferrous sulfate + citric acid” treatment had the same effect on decreasing soil pH value of 0-10 cm soil layer with the “phosphogypsum” treatment, but the latter had a more obvious effect on decreasing soil pH value of 0-30 cm soil layer, especially 10-20 cm soil layer. 【Conclusion】For alkalized soil in Yinbei Irrigation District, under light-saline water leaching, it is advisable to use phosphogypsum as soil amendment, but under high-saline water leaching, there is a better effect if phosphogypsum combined with “ferrous sulfate + citric acid” are applied. |
| Key words: brackish water; improved materials; alkalized soil; toal salt content; soil salt ions; soil pH value |
