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为探明钾肥施用方法、土壤供钾能力和对钾的吸收之间的内在关系 ,为烤烟生产合理分配和施用钾肥提供依据 ,以湖南烟区主要植烟土壤——石灰岩母质发育的红壤性水稻土为供试土壤 ,采用盆栽土培方法 ,研究了施钾方法对土壤供钾能力及烤烟钾累积的影响 .结果表明 :烟苗移栽后 30 d施用总施钾量的 40 % ,能够使土壤对生长发育中后期的烤烟维持较高的供钾能力 ,土壤速效钾和缓效钾含量比钾肥一次性作基肥施用的处理分别提高了5 7.4%～ 6 0 .9%和 5 .7%～ 6 .2 % ,同时可促进烤烟对钾的吸收与累积 ,使烟株的总吸钾量提高 5 .0 %和 15 .5 % ,烟叶的含钾量提高了 4.6 %和 12 .2 % .
In order to explore the relationship between potassium application, soil potassium supply and potassium uptake, and to provide the basis for rational distribution and application of potassium fertilizer in flue-cured tobacco production, the red soil-type rice The pot experiment was conducted to study the effects of potassium application on soil potassium supply and potassium accumulation in flue-cured tobacco.The results showed that applying 30% The soil maintained high potassium supply capacity for the middle and late growth and development of soils, soil available K and slow K content increased by 5 7.4% ~ 60.9% and 5.7% ~ 6. 2%. At the same time, it can promote the absorption and accumulation of potassium in flue-cured tobacco, increase the total potassium absorption of tobacco plants by 5.0% and 15.5%, and raise the potassium content of tobacco leaves by 4.6% and 12.2% respectively.