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水稻土的表面电化学性质与水稻土的肥力有密切关系。土壤在淹水种稻和排水落干的季节性交替过程中,其pH、Eh和养分离子浓度等都有颇大的变动,某些固相成份如铁、锰、铝等也发生形态的转化或数量的变动。这些变化都将对水稻土的表面电化学性质有明显影响。过去对水稻土的氧化还原性质已研究很多,而对涉及固液相间的离子平衡的表面电化学性质则研究较少。本工作主要是选用几种代表性水稻土及其相应的母质,研究土壤的电荷性质及其对钾离子和氯离子的吸附、作为胶体电解质而表现出来的离解度的变化、和对钾离子的结合能等,以揭示不同类型的水稻土的表面电化学性质的特点,以及水稻土形成过程中表面电化学性质的变异。
Paddy soil surface electrochemical properties and paddy soil fertility are closely related. During the seasonal alternations of submerged paddy and drained dryers, the pH, Eh and nutrient ion concentration of the soils vary greatly. Some of the solid components such as iron, manganese and aluminum also undergo morphological transformation Or the amount of change. These changes will have a significant impact on the surface electrochemical properties of paddy soils. In the past, the redox properties of paddy soils have been studied a lot, while the surface electrochemical properties involving ionic balance between solid and liquid phases have been studied less. In this work, we selected several representative paddy soils and their corresponding parent materials to study the charge properties of soils and their adsorption of potassium and chloride ions, the changes of dissociation as colloidal electrolytes, Binding energy and so on to reveal the characteristics of the surface electrochemical properties of different types of paddy soils and the variation of the surface electrochemical properties during the formation of paddy soils.