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为探讨烟叶成熟度与积温的关系，以Ｇ８０、Ｋ３２６、金烟６号为材料，对进入不同成熟档次的烟叶外观、生育期、烤后分级情况、所需积温等进行观察分析，结果表明：Ｇ８０腰叶当≥１０℃活动积温达２０９４４～２２９３９℃时为最适采收期，此时烟叶外观表现为主脉全白发亮，支脉２／３变白，叶片大部分变黄色且较均匀，叶缘和叶尖稍枯，茸毛较多脱落，有极少赤星状斑；Ｋ３２６腰叶当≥１０℃活动积温达２１８０２～２４１０５℃时为最适采收期，烟叶外观表现基本上与Ｇ８０相同，不过叶色稍淡于Ｇ８０，支脉只有１／２变白；金烟６号最适采收≥１０℃活动积温为２１５１８～２２３６１℃，烟叶外观表现为叶片黄绿，主脉变白，支脉仍有淡绿，叶尖下勾，叶缘稍枯，茸毛部分脱落。
In order to explore the relationship between tobacco maturity and accumulated temperature, the appearance, growth period, classification after roasting and required temperature of tobacco entering at different maturity grades were observed and analyzed with G80, K326 and Jinyan No.6 as the materials. The results showed that: G80 waist leaf when ≥10 ℃ active accumulated temperature up to 20944 ~ 22939 ℃, when the optimum harvest time, then the appearance of the main tobacco leaf appearance white light, branch vein 2/3 white, most of the leaves turn yellow and More uniform, leaf margin and tip slightly withered, more hair off, there are few spots brown spots; K326 waist leaf when ≥10 ℃ active accumulated temperature up to 2180 2 ~ 2410 5 ℃, the optimum harvest time, tobacco The appearance of the performance is basically the same with the G80, but slightly less leaf color G80, branch vein only 1/2 white; Jinyin 6 optimum harvest ≥ 10 ℃ active accumulated temperature of 2151.8 ~ 2236 1 ℃, the appearance of tobacco Yellow-green leaves, the main vein to white, the branch vein is still light green, the tip of the hook, leaf margin slightly dry, velvet part of the fall.