Increasing the pH of soils by applying limestone alters the sorption of herbicides and their efficiency at controlling weeds. The objectives of this study were to investigate the effects of increasing the pH and adding Ca²⁺ and Mg²⁺ on the sorption and desorption of diuron in different soils, and to evaluate the behavior of the herbicide in cationic solutions to determine whether precipitation is involved in the retention process. Sorption and desorption coefficients (Kf_s and Kf_d) were determined based on the Freundlich isotherms using seven soils, which were incubated or not incubated with agricultural limestone. Liming increased the values of Kf_s and Kf_d for diuron, even though the organic matter contents of all the soils decreased. The presence of Ca²⁺ and Mg²⁺ reduced the concentration of diuron in the aqueous solution. Increasing the pH and Ca²⁺ and Mg²⁺ concentrations by applying agricultural limestone increased the sorption and reduced the desorption of diuron in the soils investigated in this study. The behavior of diuron in calcium and magnesium solutions indicates that a precipitation process may be responsible for the increased sorption and reduced desorption of diuron in soils.

通过施用石灰石来增加土壤的pH值会改变除草剂的吸附及其除草效果。这项研究的目的是研究增加pH值以及添加Ca ²⁺和Mg ²⁺对不同土壤中敌草隆的吸附和解吸的影响，并评估除草剂在阳离子溶液中的行为，以确定沉淀是否为参与保留过程。吸附和解吸系数（Kf _s和Kf _d）是根据使用7种土壤的Freundlich等温线确定的，将它们与农业石灰石一起温育或不温育。黎明增加了Kf _s和Kf _d的值对于敌草隆，即使所有土壤的有机质含量均下降。Ca ²⁺和Mg ²⁺的存在降低了水溶液中敌草隆的浓度。通过使用农业石灰石来增加pH值和Ca ²⁺和Mg ^2+的浓度，可以增加土壤中敌草隆的吸附量并减少其解吸量。敌草隆在钙和镁溶液中的行为表明，沉淀过程可能是土壤中敌草隆的增加吸附和解吸的原因。