摘要： 通过对烤烟5个生育时期茎、叶中氮磷钾的联合测定，结果表明：氮磷钾3种营养成份在烤烟茎、叶中的含量有高有低；氮的含量始终都是叶中高于茎中，钾的含量却始终都是茎中高于叶中，而磷的含量则是缓苗期叶中高于茎中，到了团棵期以后，却是茎中含量高于叶中；从缓苗期到成熟期，3种营养成份降低的总趋势是一致的，其中钾的降幅最大，磷的降幅最缓。

关键词: 烤烟, 营养成份, 生育时期, 动态分布

Abstract: Stem and leaf N, P and K analysis on five growth stages of flue-cured tobacco indicated that N, P and K contents in stem and leaf of flue-cured tobacco were complicated. Nitrogen content was consistently higher in leaf than in stem, while K content was always higher in stem than in leaf. At the slow growth stage, P content was higher in leaf than in stem, but was reversed at the glomerating stage. From slow growth stage to maturity, the contents of all the three nutrients were in decrease, but the rate of decrease was highest for K and lowest for P.

Key words: Flue-cured tobacco, Nutrients, Growth stage, Dynamic distribution