[目的]为指导烤烟合理施肥,提高烟叶品质提供科学依据。[方法]通过田间小区试验,对烤烟植株体内K、Zn、B的交互作用进行研究。[结果]K肥、Zn肥、B肥配施能显著提高烟叶的K含量,降低烟叶烟碱含量,糖碱比和施木克值处于较合理的范围,烟叶内部化学成份趋于协调。[结论]当烤烟叶片的K、Zn、B含量比例为300∶30∶15时,烟株根系发达,干物质积累量大,烤烟产量和中上等烟的比例较高,分别达到2 701.21 kg/hm2、81.21%。 [Objective] The aim was to provide scientific basis for guiding the rational fertilization of tobacco and improving the quality of tobacco. [Method] The interaction of K, Zn and B in flue-cured tobacco plants was studied through field plot experiment. [Result] The results showed that K fertilizer, Zn fertilizer and B fertilizer could significantly increase the content of K, lower the content of nicotine, the ratio of nicotine to alkalinity and the value of mung bean in a more reasonable range, and the internal chemical components of tobacco tend to be coordinated. [Conclusion] When the proportion of K, Zn and B in flue-cured tobacco leaves was 300: 30: 15, the root system of tobacco was developed, the accumulation of dry matter was high, the yield of flue-cured tobacco and the proportion of middle and upper flue-cured tobacco were higher, reaching 2 701.21 kg / hm2, 81.21%.