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针对滨海盐渍土的特点,采用4种盐碱土改良剂在滨海盐渍土上单独施用和与石膏配合施用,研究施用后对盐渍土离子组成的影响。结果表明:施用改良剂与石膏后,在0～40 cm土层,盐渍土中离子组成比例发生不同程度的变化。pH值、电导率、Na+、K+、Cl-和总碱度(HCO-3+CO23-)在盐渍土中分别降低了0.05～0.20、8～163μS.cm-1、10.35%～47.74%、12.07%～51.69%、3.39%～40.67%和20.18%～48.56%;Mg2+、Ca2+和SO24-的含量分别增加了3.06%～13.54%、15.58%～56.20%和12.24%～76.12%。结论:改良剂与石膏配施效果比单施改良剂好,其中腐殖酸与石膏配施的改良效果最佳。
According to the characteristics of coastal saline soil, four kinds of saline-alkali soil improvers were applied separately on the coastal saline soil and applied with gypsum to study the effect on the ion composition of the saline soil after application. The results showed that the proportion of ion in salinized soils varied with different degrees after application of improver and gypsum in 0-40 cm soil layer. pH, conductivity, Na +, K +, Cl- and total alkalinity (HCO-3 + CO23-) decreased by 0.05-0.20, 8-163μS.cm-1, 10.35% -47.74% The contents of Mg2 +, Ca2 + and SO24- increased by 3.06% -13.54%, 15.58% -56.20% and 12.24% -76.12%, respectively, from 12.07% to 51.69%, from 3.39% to 40.67% and from 20.18% to 48.56%, respectively. Conclusion: The combination of modifier and gypsum is better than the single modifier, and the best one is the combination of humic acid and gypsum.