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秋烟叶.秋季采收的烟叶称为秋烟叶。秋季气温低、日照较少,烟叶成熟度差,叶片小而厚,含水量少。在烘烤中常出现烤房内水分不足、相对湿度低、烟叶不易变黄易烤成青烟等现象。对于秋烟叶可采取低温烘烤法,绑烟竿装炕要密些,装炕后加强保温,把天窗、地洞关严,延长变黄时间,缓慢升温。吊火温度从27℃开始,保持4小时后升到28～30℃(此温保持4～8小时),待叶片发软后,再升温到32℃,促进烟叶变黄。当叶片1/3～1/2变黄时,逐渐升温到35℃。若变黄期相对湿度不够,可向烤房地面和墙壁洒水。当叶片3/5～4/5变黄时,再升温到38℃,维持此温度到叶片全黄或仅主脉附近残留青色时转入定色期。在定色期,升温要慢而稳,每小时以0.5～1.0℃的速度从40℃升到55℃,保持此温度到叶片干1/2后,才能将温度提高到60℃,维持此温度至干筋停火。急骤升温或升温过高(超过60℃),都会出现褐色或红色叶片,降低品质。
Autumn tobacco leaves. Autumn harvest tobacco known as autumn tobacco leaves. Low temperature in autumn, less sunshine, poor leaf maturity, small and thick leaves, low water content. Baking often appear in the baking room inadequate moisture, low relative humidity, easy to change the tobacco is not easy to turn yellow smoke and other phenomena. For the autumn tobacco can be low-temperature baking method, the tobacco pole mounted kang to close some densely packed, after the kang to strengthen the insulation, the skylight, hole strict, prolonged yellowing, slowly warming. The temperature of hanging fire started from 27 ℃, kept for 4 hours and then rose to 28-30 ℃ (this temperature was kept for 4 to 8 hours). After the leaves became soft, the temperature was raised to 32 ℃ to promote the yellowing of tobacco leaves. When the leaves 1/3 ~ 1/2 turn yellow, gradually warming to 35 ℃. If the relative humidity in the yellowing stage is not enough, you can sprinkle water on the floor and the wall of the barn. When the leaves 3/5 ~ 4/5 turn yellow, then warmed to 38 ℃, to maintain this temperature to the leaves all yellow or only the main vein near the residual cyan into the fixed period. In the fixed-color period, the temperature should be slow and steady. The temperature should rise from 40 ℃ to 55 ℃ per hour at the temperature of 0.5 ~ 1.0 ℃. Maintaining this temperature to 60 ℃ after maintaining the temperature to 1/2 dry leaves To dry muscle ceasefire. Sharp heating or heating is too high (over 60 ℃), there will be brown or red leaves, reduce the quality.