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采用传统的振荡平衡法探讨土耕层和粘化层土样固定铵的动力学特性。结果表明，Ｅｌｏｖｉｃｈ和一级扩散动力学方程最适于描述铵固定动力学特性，表现在相关系数ｒ值大，标准误（ＳＥ）小；抛物扩散律能较满意的描述实验数据，表明铵固定属扩散控制过程。根据实验数据分别建立了不同温度、铵浓度、土样的动力学方程。由动力学一级方程确定了固铵速度常数和固铵半时值。并讨论了时间、介质温度、铵数量、粘粒数量对土壤固铵的影响。
The dynamic characteristics of soil-fixed ammonium in soil layer and clay soil layer are discussed by the traditional oscillation equilibrium method. The results show that Elovich and the first-order kinetic equation of diffusion are the most suitable for describing the kinetics of ammonium fixation. The results show that the correlation coefficient r is large and the standard error (SE) is small. The parabolic diffusion law can describe the experimental data satisfactorily, Is a diffusion control process. Based on the experimental data, the kinetic equations of different temperature, ammonium concentration and soil samples were established respectively. The kinetic first-order equation was used to determine the rate constant of ammonium and the half-value of ammonium formate. The effects of time, medium temperature, ammonium amount and clay amount on the immobilization of soil were also discussed.