电热密集烤箱烘烤烟叶变黄期湿度容差研究

Study on the Humidity Tolerance of Flue-curing Barn during Yellowing Stage on Tobacco Leaves

【目的】探讨适宜密集烘烤变黄期湿度的容差范围。【方法】采用电热式温湿自控密集烤烟箱,以K326品种为试验材料,研究了在变黄期各湿度梯度处理对不同部位烤后烟叶经济性状、内在化学成分和感官评吸质量的影响。【结果】(1)在相对湿度60%~80%条件下,烤至72h时不同部位烟叶的失水率均达到40%~60%,叶绿素降解率均高于80%,有利于烟叶变黄和定色;(2)相对湿度70%~80%条件下,不同部位烤后烟叶的经济性状指标较高,其中上等烟比例最高可达78.01%,均价最高可达29.26CNY/kg;(3)相对湿度60%~80%条件下,不同部位烤后烟叶的内在化学成分较协调,且烟叶感官评吸质量较好,其中下、中部叶以相对湿度70%~80%处理、上部叶以相对湿度65%~70%处理的感官评吸质量达到最大值。【结论】变黄期以相对湿度60%~80%容差范围烘烤处理的烤后烟叶基本满足工业可用性。

[ Purpose] To discuss the suitable tolerance range of humidity during yellowing stage.[Method]We studied the effects of different parts under different humidity gradient treatment during yellowing stage on the economic characters, chemical composition and sensory quality. The electrothermal temperature humidity control dense flue-curing barn was used for this experiment, and flue-cured tobacco variety K326 was took as the test material.[Result](1) With relative humidity of 60%-80% and curing for 72 hours, the filtration rate of different parts of flue-cured tobacco achieved 40% to 60%, the chlorophyll degradation rate achieved over 80%, which was good for tobacco leaves turn yellow and set the color.(2) During yellowing stage under relative humidity of 70%-80%, different parts of flue-cured tobacco had a better economic characters, among them, the proportion of superior tobacco could be as high as 78.01%, and the average price could be up to 29.28 CNY/kg.(3) During yellowing stage between relative humidity of 60%-80%, the internal chemical composition of different parts of flue-cured tobacco was more harmonious, and the sensory evaluation of absorption was better, what’s more, the middle leaves and the lower leaves yellow treated at relative humidity of 70%-80% and upper leaves at relative humidity of 65%-70%, the sensory smoking quality reached maximum value.[Conclusion]The roasted tobacco baked for relative humidity of 60%-80% during the yellowing stage can met on industrial demands.