变黄中期湿球高低及稳温时间对烟叶质量的影响

Effects of Wet-bulb Temperature and Stable Time on the Quality of Tobacco in Leaf Yellowing Medium Stage

[目的]研究密集烤房烟叶烘烤变黄中期湿球高低及稳温时间对烟叶质量的影响,为优化密集烤房烟叶烘烤提供参考。[方法]在变黄期时间相同的条件下,只调整38和42℃湿球温度和稳温时间,对粤烟97品种中部烤后烟叶外观质量、化学成分协调性、评吸质量进行了分析。[结果]中部烟叶变黄中期湿球温度控制在35.5℃、稳温25 h,42℃湿球控制35.5℃、稳温13 h的T2处理,变黄期失水协调性较好,烤后烟叶化学成分协调性较好,颜色橘黄鲜亮,色度、油分较好,总糖、还原糖、糖碱比较高,烟碱、含氮量较低,评吸得分最高,有利于改善烟叶的外观质量和化学成分协调性,提高烟叶的评吸质量。[结论]变黄期的湿球温度高低及稳温时间长短对烟叶外观质量、化学成分协调性以及评吸质量都有一定的影响,以中温、中湿,38℃稳温时间较长的T2处理效果较好。

[Objective] To research the effect of wet-bulb temperature and stable time on quality of tobacco in leaf yellowing medium stage in bulk curing barn, and to provide references for the optimization of tobacco baking.[ Method] Under the condition of the same yellowing peri-od, we only adjusted the wet-bulb temperature and stable time of 38 and 42 ℃.The appearance quality, chemical composition and smoking test quality of Yueyan97 flue-cured tobacco in the center section were analyzed.[ Result] Under T2 treatment （ the conditions of wet bulb tem-perature control at 35.5 ℃, stable temperature for 25 h, stable temperature for 13 h of wet ball control at 42℃of center leaf）, tobacco leaves had better coordination in yellowing medium stage after baking, bright yellow color, and better color and oil content.The total sugar, reducing sugar, sugar-nicotine ratio were lower;smoking score was the highest, which was beneficial to improve the appearance quality of tobacco leaf, to increase the coordination of chemical composition, and to enhance the quality of tobacco leaf.[ Conclusion] Wet bulb temperature and sta-ble temperature time in the yellowing stage had certain influence on the appearance quality, the chemical composition, and the smoking quality of tobacco leaves.Among them, T2 treatment （ moderate temperature, medium humidity, 38 ℃, relatively long stable time） was relatively good.