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为了揭示不同改良措施对盐碱土改良培肥的影响效果,并筛选出较有效、快速的改良措施,本文研究了不同改良措施下土壤剖面速效养分含量、有机质含量、可溶性盐总量的分布特征及微团聚体、机械组成的变化,共设了如下4个处理:施用有机肥改良3年(T1)、施有机肥改良6年(T2)、单施Al2(SO4)3改良3年(T3)和有机肥与Al2(SO4)3混合施用改良3年(T4)。结果表明:不同的改良措施都使速效养分、有机质含量得到了快速提升,含盐量大幅降低,土壤结构明显改善。在0~10 cm土层中有机质含量互相之间存在显著性差异,T4处理最优,速效养分含量与其变化趋势基本一致,除速效磷外。各处理的可溶性盐总量整体的脱盐效果为T4>T3>T2>T1。从结构系数和分散系数来看,在表层土壤中T4处理明显优于其他处理。综合来看有机肥与硫酸铝混合施用的处理最优,达到了快速改良的目的。
In order to reveal the effect of different improvement measures on improved fertilization of saline-alkali soil and select more effective and rapid improvement measures, this paper studied the distribution characteristics of available nutrient content, organic matter content and total soluble salt content of soil profile under different improvement measures. Micro-aggregates and mechanical composition, the following four treatments were set as follows: application of organic fertilizer for three years (T1), application of organic fertilizer for six years (T2), application of Al2 (SO4) 3 alone for three years (T3) And organic fertilizer with Al2 (SO4) 3 mixed for 3 years (T4). The results showed that: with the improvement measures, the content of available nutrients and organic matter were rapidly increased, the salt content decreased significantly, and the soil structure was obviously improved. The content of organic matter in 0 ~ 10 cm soil layer was significantly different from each other, T4 treatment was the best, available nutrient content and its changing trend basically the same, except available phosphorus. The overall desalination effect of the total amount of soluble salts in each treatment is T4> T3> T2> T1. Judging from the structure coefficient and dispersion coefficient, T4 treatment in topsoil is obviously better than other treatments. Comprehensive view of organic fertilizer and aluminum sulfate mixed application of the best, to achieve the purpose of rapid improvement.