河南农业大学学报2018，Vol.52Issue(2)：187-192,231,7.
上部叶带茎烘烤水分迁移及形态结构变化
Changes of moisture migration and morphological structure of tobacco upper leaves with stalks during curing
摘要
Abstract
Study on the characteristics of moisture migration and physical morphological structure of tobacco upper leaves with stalks during curing,in order to provide reference for optimization of curing technology of tobacco upper leaves with stalks.The upper leaves of Yunyan-87 were used as experimental materials,the moisture migration,morphological shrinkage and microstructure of the tobacco leaves during curing and the physical characteristics of the cured tobacco leaves were studied by nuclear magnetic imaging and scanning electron microscope.The results showed that the moisture in the stalk transported to tobacco lamina through tobacco midrib during curing,which made the moisture content of tobacco lamina and tobacco midrib of tobacco leaves significantly higher than those of tobacco leaves without stalks.The moisture migration rate of the stalk decreased gradually after 54℃.The leaf thickness of tobacco leaves with stalks was significantly lower than those of tobacco upper leaves without stalk before 54℃,but was significantly higher after 54℃.The tobacco midrib diameter shrinkage rate of tobacco leaves with stalks was significantly lower than those of tobacco leaves without stalk during curing.Changes of palisade tissue cell structure of tobacco leaves with stalks were significantly greater than those of tobacco leaves without stalk after the lamina drying.The single leaf weight and leaf thickness of tobacco leaves cured with stalks were significantly lower than those tobacco leaves cured without stalk,whereas percentage of stem,filling value and tensile breaking strength of tobacco leaves cured with stalks were significantly higher than those tobacco leaves cured without stalk.It could be seen that the tobacco leaves curing with stalks mainly delayed the drying of tobacco leaves,which affected the changes of morphological shrinkage,microstructure,and physical properties of cured tobacco leaves,and the industrial availability of its cured tobacco leaves was improved to some extent.关键词
带茎烘烤/水分迁移/形态收缩,微观结构/物理特性Key words
curing with stalk/moisture migration/morphological shrinkage/microscopic structure/physical property分类
农业科技引用本文复制引用
魏硕,谭方利,马明,吴文信,李青常,刘小斌,李宏光,方明,宋朝鹏..上部叶带茎烘烤水分迁移及形态结构变化[J].河南农业大学学报,2018,52(2):187-192,231,7.基金项目
湖南省烟草公司郴州市公司资助项目(201543100094001) （201543100094001）
