由于农作物复种指数不断提高,氮磷化肥用量加大,单位面积产量上升,土壤中被作物吸收和淋溶损失的钾素更多,造成某些土壤有效钾供应能力降低,特别是把钾素转变成可给态的能力减弱,出现了不能满足作物生长需要的趋向。因此,研究钾肥的效果及其有关条件,对促进农业增产具有重要意义。 Due to the continuous improvement of the multiple cropping index of crops, the amount of N and P fertilizers increased and the yield per unit area increased, and more potassium was absorbed and leached by crops in the soil, resulting in the decrease of available potassium supply in some soils. In particular, The ability to give the state weakened, there has been unable to meet the needs of crop growth. Therefore, to study the effect of potassium fertilizer and its related conditions is of great significance to the promotion of agricultural production.