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通过对1158个点取样调查，分析了河南潮土钾素变化状况与肥效。结果表明；土壤速效钾每年以3．8mg／kg的速度下降，施肥制度对下降速度影响较大．主要作物上钾肥肥效日趋明显，并提出了补钾对策。
Through the sampling survey of 1158 spots, the change status and fertilizer efficiency of potassium in tidal flat in Henan Province were analyzed. The results showed that the soil available K decreased 3.8mg / kg annually, and the fertilization system had a great influence on the decline rate. The main crop potassium fertilizer efficiency has become increasingly evident, and proposed potassium solution.