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对经生物耗竭后的８种土壤的研究表明：它们经过自然风干后，土壤的层间钾能自然释放而使交换性钾得到部分恢复，但耗竭程度愈烈，恢复能力则随之下降；经淹水或湿润处理后，土壤的交换性钾反有较大程度的再固定；而干湿交替处理后，能促进低施钾水平土壤中新固定态层间钾的释放，高施钾水平土壤中交换性钾的进一步固定。生物耗竭使土壤的固钾能力增强，但白土及黄泥土土壤的固钾率仅１９—４６％，新固定态钾易被作物再利用；而黄潮土及鸭屎土的固钾率则上升到５５—７４％，新固定态钾较难再利用。耗竭土壤的固钾强度与代表土壤供钾潜力指标的缓效钾值及土壤供钾容量（ＥＵＦ－Ｋ－８０℃）与数量（ＥＵＦ－Ｋ－２０℃）比例的ＥＵＦ－ＫＱ值均有很好的相关。
Studies on the eight soils after bio-depletion showed that after they were naturally air-dried, the inter-layer potassium released spontaneously and partially recovered the exchangeable potassium, but the more depleted the soil, the less the resilience would be. After flooding or wetting treatment, the exchangeable potassium in the soil had a greater degree of re-fixation. After alternating wetting and drying treatment, potassium released from the newly fixed layer in the low K fertilization soil was promoted. In the exchange of potassium further fixed. Bio-depletion enhanced soil potassium fixation capacity, but potassium-fixing rates of white soil and yellow soil were only 19-46%. Newly-fixed potassium was easily reused by crops. However, the potassium recovery rate of yellow soil and duck soil increased to 55 -74%, the new fixed potassium is more difficult to reuse. The EUF-KQ values of the potassium fixing strength in depleted soils and the slow-acting K values representing soil potential for potassium supply and the ratio of EUF-K-80 ℃ and EUF-K-20 ℃ Good related.