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通过室内土柱试验探讨了不同矿化度水淋洗重度盐碱土的水盐运移特征。结果表明,微咸水和咸水的入渗速率要明显高于淡水入渗。在灌水淋洗后土壤盐分含量均大幅下降,以淡水和微咸水的脱盐效果较好。3个处理淋洗后土壤的Na+、Cl-、SO42-、K+、Mg2+、Ca2+含量下降,CO32-、HCO3-含量有所上升,土壤pH值上升,淡水淋洗土壤pH值上升幅度较大。因此,微咸水淋洗重度盐碱土在3种矿化度水中的综合淋洗效果最好,用微咸水代替淡水淋盐改良,将会有不错的效果。
The soil-column test was conducted to investigate the characteristics of water and salt transport in heavily salinized saline soils with different salinities. The results show that the infiltration rate of brackish and brackish water is obviously higher than that of fresh water infiltration. The soil salinity content dropped drastically after irrigation and leaching, and the desalination effect of freshwater and brackish water was better. The contents of Na +, Cl-, SO42-, K +, Mg2 + and Ca2 + in soil decreased after the three treatments. The content of CO32- and HCO3- increased, while the pH value of soil increased. Therefore, the comprehensive leaching effect of brackish water leaching heavy saline soil in the three kinds of salinity water is the best, with brackish water instead of fresh water leaching salt to improve, there will be good results.