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对二滩水电站８种新垦土壤钾的固定和释放研究表明，新垦土壤全钾、有效钾（除菜园土外）低，浸泡后大部分土壤有效钾含量提高。土壤对钾的固定量随钾平衡浓度的升高而升高；固定率随平衡浓度的升高而降低。其中，红壤、菜园土、水稻土钾含量高，土壤固钾能力弱；而漂灰土、荒地土、旱坡土、砂质新改土和重壤质新改土钾含量低，土壤固钾能力强。释放率反映土壤固定钾的活性，红壤、菜园土、水稻土固定钾的有效性高；而漂灰土、荒地土、旱坡土、砂质新改土和重壤质新改土固定钾的有效性低。三种吸附模型拟合土壤钾的固定过程呈极显著相关，其中以Ｆｌｅｕｎｄｌｉｃｈ方程最优。
The study on the fixation and release of potassium in 8 newly reclaimed soils of Ertan Hydropower Station shows that the total available potassium (except for vegetable soil) of the newly reclaimed soil is low, and the available potassium content of most soils after soaking increases. The fixed amount of potassium in soil increased with the increase of potassium concentration; the fixation rate decreased with the increase of equilibrium concentration. Among them, red soil, vegetable garden soil and paddy soil had high potassium content and weak potassium fixation ability in soil. However, the content of potassium in fresh loam soil, wasteland soil, dry slope soil, Strong. The release rate reflects the activity of fixed potassium in soil, and the availability of fixed potassium in red soil, vegetable garden soil and paddy soil is high. However, the effective potassium content of the newly amended soil with loamy soil, wasteland soil, Sex is low. Three kinds of adsorption models fitting soil potassium fixation process was extremely significant correlation, of which the Fleundlich equation is the best.