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采用连续液流法研究了5种黄土性土壤吸附、解吸K+的动力学性质。结果表明：（1）供试土壤K+吸附、解吸反应分别在16-24及26-60min达到平衡。吸附平衡时间及平衡吸附量与CEC及粘粒含量有关。（2）平衡前不同时段的吸附解吸速度及吸附解吸率与反应时间1nt间存在极显著的线性关系。其中反应速度直线和解吸率直线的斜率、初始反应速度及初始解吸率均与CEC及粘粒含量密切相关。（3）一级反应方程和Elovich方程分别为描述K+吸附、解吸反应的最优模型。（4）K+的吸附、解吸以快、中、慢不同速率进行，反映出土壤固相表面存在不同能态的K+吸附点。（5）土壤对K+的吸附、解吸是扩散控制过程。
The kinetic properties of K + adsorption and desorption in five loess soils were studied by continuous flow method. The results showed that: (1) K + adsorption and desorption reaction of soil were balanced at 16-24 and 26-60min respectively. Adsorption equilibrium time and equilibrium adsorption capacity and CEC and clay content. (2) The adsorption-desorption rate, adsorption-desorption rate and the reaction time 1nt have a significant linear relationship at different time before equilibrium. The slope, initial reaction rate and initial desorption rate of straight line and desorption rate are closely related to CEC and clay content. (3) The first-order reaction equation and the Elovich equation are the best models to describe the K + adsorption and desorption respectively. (4) Adsorption and desorption of K + were carried out at different rates of fast, medium and slow, which reflected K + adsorption sites with different energy states on the solid surface of soil. (5) Soil adsorption of K +, desorption is diffusion control process.