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本文以在油稻稻、麦稻和麦棉三种种植制度下进行的长期（10年）施钾田间定位试验的结果为依据，阐述了长期施钾对几种主要农作物增产及施肥效益的影响，对长期施钾后供试条件下土壤钾素含量及形态的变化进行了分析。
In this paper, based on the results of long-term (10 years) field experiment of paddy field application under the three planting systems of rice, wheat and cotton, the effects of long-term potassium application on yield increase and fertilizer efficiency of several main crops , The changes of soil K content and morphology under long-term potassium application were analyzed.