我县从1980年早稻开始进行钾肥施用效果试验,两年试验结果证明,钾肥能促进水稻增产。土壤速效钾越高,经济效益越低。钾肥施于晚稻增产效果大于早稻。低产稻田、潜育化稻田施钾增产显著。我县稻田速效钾含量在50ppm 以下的有25万亩,如全部施上钾肥,以亩施15斤钾肥增产稻谷50斤计,可增产稻谷1250万斤。 In 1980, the county started to test the effect of potash fertilizer application from early rice in 1980. The result of two years’ experiment shows that potash fertilizer can promote the yield increase of rice. The higher the soil available potassium, the lower the economic benefit. Potash fertilizer applied to late rice yield more than early rice. Low-yield paddy fields, gleaming paddy field facilities to increase yield significantly. The available potassium content in paddy fields in our county is 25 million mu under 50ppm. If all of them are applied to potash fertilizer, 50 kg of paddy rice will be increased by 15 kg of potassium fertilizer per acre, which will increase 12.5 million kg of rice.