摘要
[目的]研究叶面喷施钾肥次数及喷施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试验设计，通过田间试验，研究叶面喷施钾肥次数及喷施时期对烟叶总糖、还原糖、烟碱、总氮、钾等常规化学成分的影响。[结果]打顶当天＋现蕾期喷钾6次处理可显著降低中、上部烟叶还原糖、总糖、烟碱、总氮含量，提高烟叶中钾含量，改善烟叶的内在品质，促进烟叶内在化学成分的协调。[结论]在当地烟叶生产中采用该处理有利于提高当地的烟叶生产水平。
Abstract
Objective] The aim was to study effects of foliage spraying potassium times and periods on conventional chemical components of to-bacco leaf.[Method] By using factor randomized block design, through field experiment, effects of foliage spraying potassium times and periods on conventional chemical components of tobacco leaf such as total sugar, reducing sugar, nicotine, total nitrogen, potassium were studied.[Re-sult] Spraying potassium for 6 times on topping day+budding period could significantly reduce reducing sugar, total sugar, nicotine, total nitro-gen content in middle and upper tobacco leaf, improve potassium content, perfect inner quality of tobacco leaf, promote the coordination of chem-ical components in tobacco leaf.[Conclusion] The treatment is helpful to improve the level of local tobacco production.
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