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研究在田间试验条件下进行。结果表明：尽管凤阳烟区土壤具有较高的供钾潜力，但不施钾肥时，烟草植株仍出现明显的缺钾症状。施钾显著增加了烟叶长度、单叶干重、单株烟茎和根的重量，从而显著增加了烟叶产量并提高了烤烟产值。硫酸钾的施用量为４８６ｋｇ／ｈｍ２时，烤烟的产量和产值最高，钾肥施用过多则降低烤烟的产量及产值。单层施钾处理的烟草，其单叶干重、单株根重和烤烟产量及产值均高于分层施钾处理的。随着施钾量提高，烟叶中钾含量相应增加，而全氮、烟碱和蛋白质含量相应降低，分层施钾的烟草其钾含量高于单层施钾的
The study was conducted under field test conditions. The results showed that although Fengyang tobacco soil had high potential for potassium supply, the tobacco plants still showed obvious symptoms of potassium deficiency when no potassium was applied. Potassium application significantly increased leaf length, single leaf dry weight, and the weight of tobacco stems and roots, which significantly increased leaf yield and increased the value of flue-cured tobacco. When the potassium sulfate was 486kg / hm2, the yield and output value of flue-cured tobacco were the highest while too much potassium fertilizer reduced the output and output value of flue-cured tobacco. Monolayer treatment of tobacco, single leaf dry weight, root weight per plant and yield and output of flue-cured tobacco were higher than the stratification of potassium treatment. With the increase of potassium application, the content of potassium in tobacco leaves increased correspondingly, while the content of total nitrogen, nicotine and protein decreased correspondingly. The potassium content of tobacco with stratified application of potassium was higher than that of potassium application