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定位试验１５年的结果表明：要维持原基础肥力的水平，必须使当年当季投入的肥料与作物消耗的养分保持平衡；土壤速效钾与年限的相关不显著，基本处于动态平衡；增施钾肥能增强作物的抗逆性，提高产量。
The result of 15-year pilot test shows that to maintain the original basic fertility level, the fertilizer and the nutrients consumed by the crop must be kept in balance. The correlation between soil available K and age is not significant and is basically in a dynamic equilibrium. Can enhance the resistance of crops and increase production.