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利用Q／I法对山东省主要土壤钾素供应的强度因素、容量因素及其关系进行研究。结果表明，供试样品的ΔK和AR值呈极显著的直线相关关系。8个样品的-ΔK°、AR°和PBC平均值分别为0．5342cmol／kg、1．689（mol／L）0.5×10－3和324.71cmolkg－1／（molL-1）0.5×10－3。普通棕壤和淋溶稿上的供钾容量因素好，—ΔK°为0．8392和0．6462cmol／kg；而潮土供钾的强度因素好，但缓冲能力差，AR°值为2．023（mol／L）0．5×10－3。砂姜黑土钾素供应的缓冲能力好，PBC值为411．9cmolkg-1／（mol／L）0.5×10－3。四大土类供钾强度因素的顺序为潮土＞棕壤＞褐土＞砂姜黑土，供钾缓冲能力的顺序则与之相反，这与供试样品的粘粒含量和阳离子代换量等因素有关。
The Q / I method was used to study the intensity and capacity of the main soil potassium supply in Shandong Province and their relations. The results showed that the samples for the ΔK and AR values showed a significant linear correlation. The average values of -ΔK °, AR ° and PBC for the eight samples were 0.5342 cmol / kg, 1.689 (mol / L), 0.5 × 10-3 and 324.71 cmolkg-1 / (molL-1), 0.5 × 10- 3. The potassium supply capacity of common brown soil and leached paper was good, -ΔK ° was 0.8392 and 0.6462cmol / kg, while that of tide soil was good, but the buffering ability was poor with an AR ° of 2. 023 (mol / L) 0.5 × 10 -3. Shajiang black soil potassium supply buffer capacity, PBC value of 411.9cmolkg-1 / (mol / L) 0.5 × 10-3. The order of soil potassium supplying strength in the four major soils is that in the order of tide soil> brown soil> cinnamon soil> saprolium black soil, and the order of potassium buffer capacity is the opposite, which is related to the clay content and cation exchange capacity Factors related.