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对甘肃景电灌区盐化和有机质对土壤团聚体的稳定性、黏粒的分散性及阿特伯格极限进行了调查研究。研究结果表明该灌区盐化土壤中水溶性盐以钠盐为主,土壤具有钠质现象。随含盐量和交换性钠离子百分率（ESP）的增加土壤团聚体的稳定性显著降低,黏粒的分散性显著增加,阿特伯格极限具有降低的趋势,明确地说明盐化和伴随着的钠质化是土壤结构性能退化的主要原因。随有机质含量的增加,土壤团聚体的稳定性显著增加,黏粒的分散性显著降低,阿特伯格极限显著增加,说明增加有机质含量可以显著改善盐化土壤的结构性能。可以根据如下公式利用有机质含量（OM）和ESP预测团聚体的稳定性:WSAR=19.4+0.98OM-1.43 ESP（R2=0.5741,n=67）。团聚体稳定性、黏粒分散性、流限和塑限互相之间显著相关,说明流限和塑限可以作为反映盐化土壤结构状况的指标。
The stability of saline soil and organic matter on soil aggregates, the dispersibility of clay particles and the limit of Atberg were investigated in Jingdi Irrigation Area of Gansu Province. The results showed that the water-soluble salts in salinized soil in the irrigation area were dominated by sodium and the soil had sodium. With the increase of salinity and exchangeable sodium ion (ESP), the stability of soil aggregates decreased significantly, the dispersibility of clay particles increased significantly, and the Atberg limit tended to decrease, which clearly indicated that salinization and accompanying The sodium formation is the main reason for the degradation of soil structural properties. With the increase of organic matter content, the stability of soil aggregates increased significantly, the dispersibility of clay particles decreased significantly, and the limit of Atberg increased significantly, indicating that increasing organic matter content could significantly improve the structural properties of salinized soils. Aggregate stability can be predicted using organic matter content (OM) and ESP according to the following equation: WSAR = 19.4 + 0.98 OM-1.43 ESP (R2 = 0.5741, n = 67). Aggregate stability, clay dispersibility, flow limit and plastic limit were significantly correlated with each other, indicating that the flow and plastic limit can be used as an indicator of salinized soil structure.