钾肥不同基追比及根部追钾时期对烟叶常规化学成分的影响

Effects of Different Base Topdressing ratio of Potassium Fertilizer and Topdressing Periods on Roots on Concentional Chemical Composition of Tobacco Leaf

[目的]研究钾肥不同基追比及根部追钾时期对烟叶常规化学成分的影响。[方法]采用两因素随机区组设计,即钾肥基追比和追钾时期2个因素,通过田间试验,分析不同处理对烟叶还原糖、总糖、总氮、烟碱、钾等常规化学成分的影响。[结果]钾肥基追比例为3/5基肥+2/5追肥、灌根追钾时期为1次灌根追钾(团棵期)+1次打顶当天灌根追钾(2次各半)时,烟叶还原糖、总糖、总氮、烟碱含量相对较低,钾含量相对较高,烟叶内在品质协调,质量好。[结论]在当地烟叶生产中,采取该处理措施施用钾肥有利于优质烟叶的生产。

[Objective] The aim was to study effects of different base topdressing ratio of potassium fertilizer and topdressing periods on concen-tional chemical composition of tobacco leaf.[ Method] By using two factors（ potassium fertilizer base topdressing and periods） randomized block design, through field experiment, effects of different treatments on tobacco reducing sugar, total sugar, total nitrogen, nicotine, potassium were analyzed.[Result] Under the treatment of 3/5 base fertilizer＋2/5 topdressing, one time topdressing on roots with potassium fertilizer（resettling stage） ＋one time in topdressing day（divided evenly）, tobacco reducing sugar, total sugar, total nitrogen, nicotine content were relatively low, potassium content was relatively high, the internal quality of tobacco was harmonious and quality was good.[Conclusion] In local tobacco pro-duction, the adopted measures for applying potassium fertilizer is conductive to high quality tobacco production.