Effects of Different Stem-drying Temperatures in Bulk Curing-barn on Quality of Tobacco Leaf
Dongfen Zhang · Hunan Agricultural Sciences · 2013
The tobacco variety Zhongyan100 was taken as experimental materials to study the effects of different temperatures in stem-drying phase in bulk curing-barn on quality of tobacco leaves.The results showed that the suitable stem-drying temperature(stabilizing dry bulb temperature at about 67℃ and wet bulb temperature at 41℃～42℃ until the end of baking in whole curing-barn) can improve the economic characters,the appearance and the sensory quality of cured tobacco.Compared with the other two treatments,the stem-drying treatment with middle temperature(67℃) increased the proportion of superior tobacco,the proportion of middle-high level tobacco,the proportion of orange smoke and the average price.The contents of total sugar and reducing sugar,the ratio of total sugar to reducing sugar,the ratio of sugar to nitrogen,and the ratio of nitrogen to alkali increased with increasing stem-drying temperature.The chemical components in tobacco with middle stem-drying temperature were relatively harmonized.The total sensory score of each treatment was the highest in treatment of middle stem-drying temperature,medium in treatment of low stem-drying temperature,and the lowest in treatment of high stem-drying temperature.In comparison with the other two treatments,the treatment of middle stem-drying temperature was high in the indicators of aroma quality,aroma concentration,offensive smoke and aftertaste.