[Objective] To research the effects of branching-after-topping and topdressing on the yield of different parts of early-flowering flue-cured tobacco.[Method]With tobacco cultivar K326 as the research materials,we researched the effects of branching-after-topping and topdress-ing on the agronomic characters,yield per plant,yield of different parts,proportion of first-class tobacco and average price.[Result] Branching-af-ter-topping and topdressing could augment productivity of flue-cured tobacco;the outputs of central section,lower leaves and upper leaves of the treatments of branching 4 leaves after topping and 15 kg/hm2pure nitrate as topdressing was larger,and the proportions of central section,lower leaves and upper leaves to the entire output of single plant was larger.The measure of branching 4 leaves after topping and 15 kg/hm2pure ni-trates as topdressing for early-flowering tobacco was the best.[Conclusion] This research provided theoretical basis for the actual production.%[目的]研究驳枝和追施氮肥对早花烤烟不同部位烟叶产量的影响.[方法]以烟草品种K326为试验材料,研究了驳枝和追肥对早花烟株农艺性状、单株烟叶产量、不同部位烟叶产量、上等烟比例和均价的影响.[结果]发生早花后驳枝和追施一定数量的氮肥可使烤烟单株烟叶产量增加;驳枝上留叶4片和驳枝后追施纯氮15 kg/hm2处理的腰叶、上二棚和下二棚的绝对产量之和较大,且占单株烟叶总产量的比重较大;对早花烟株处理,以采取驳枝上留4片叶同时追施纯氮15 kg/hm2的补救措施为宜.[结论]该研究为烤烟实际生产提供理论依据.
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