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以杂交中稻汕优６３为材料，研究了攀西稻作区杂交水稻施钾的增产效应及生理作用。结果表明，在攀西稻作区，杂交水稻施钾有显著的增产效应，但过量施钾其增产效应降低，施钾量与稻谷产量呈二次曲线关系，经济最佳施钾量为Ｋ２Ｏ１１７．９ｋｇ／ｈａ，施氮量为Ｎ１５０ｋｇ／ｈａ，施氮、钾比为２１．５７；施钾可促进稻株对Ｎ、Ｐ、Ｋ的吸收及干物质的积累，也有利于养分及光合产物向穗部的运转，但过量施钾时效应也会降低；在缺钾稻田，增施氮肥难以增产，必须增施钾肥才能达到增产目的。
The hybrid rice “Shanyou 63” was used as material to study the yield-increasing effects and physiological effects of potassium fertilization on hybrid rice in Panxi area. The results showed that in paddy cropping area of Panxi, hybrid rice had obvious yield increasing effect on potassium application, but the yield increasing effect was decreased when potassium was applied excessively. The potassium applying amount and rice yield showed a quadratic curve, and the best potassium application rate was K2O117. 9 kg / ha, nitrogen application rate of N150 kg / ha, and nitrogen and potassium ratio of 21.57. K could promote the uptake of N, P, K and accumulation of dry matter in rice plants, and also benefit to nutrient and photosynthetic products Panicle operation, but the effect of over-fertilization of potassium will also be reduced; in paddy-deficient rice fields, it is difficult to increase the yield of nitrogen fertilizers and potassium fertilizer must be increased to achieve the purpose of increasing yields.