本研究在辨析了土壤流动法中动力学参数的传统求算法的一些缺点之后 ,重新考察了流动法的特征 ,在此基础上提出了一种先通过数值微分——五点三次多项式——求算出反应速率之后 ,再依据反应速率求算动力学参数的方法 ,并运用该法求算了潮土对钾离子的吸附、解吸附动力学参数。结果说明该法具有很好的可靠性 After analyzing some shortcomings of the traditional calculation method of kinetic parameters in the soil flow method, this study reexamined the characteristics of the flow method. On the basis of this, a new method of numerical differentiation - five point and three degree polynomials - Calculate the reaction rate, and then calculate the kinetic parameters based on the reaction rate method, and use this method to calculate the adsorption and desorption kinetic parameters of potassium in the alluvial soil. The results show that the method has good reliability