烤烟变黄期叶绿素降解动力学分析  

Analysis of the Chlorophyll Degradation Kinetics of Flue-cured Tobacco during the Yellowing Stage

作　　者：魏硕[1] 王涛[2] 王松峰[3] 高华锋[2] 解燕[2] 毛建书[2] 李祖红[2] 张峰[2] 宋朝鹏[1] WEI Shuo;WANG Tao;WANG Songfeng;GAO Huafeng;XIE Yan;MAO Jianshu;LI Zuhong;ZHANG Feng;SONG Zhaopeng(College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China;Yunnan Qujing Municipal Tobacco Company, Qujing, Yunan 655000, China;Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture, Tobacco Research Institute of CAAS, Qingdao 266101, China)

机构地区：[1]河南农业大学烟草学院,郑州450002 [2]云南省烟草公司曲靖市公司,云南曲靖655000 [3]中国农业科学院烟草研究所,农业部烟草生物学与加工重点实验室,青岛266101

出　　处：《中国烟草科学》2017年第4期86-91,共6页Chinese Tobacco Science

基　　金：中国烟草总公司云南省公司项目“防治烘烤过程中烟叶腐烂霉变技术研究推广”(2016YN10)

摘　　要：为研究不同烤烟品种的变黄特性和预测变黄期烟叶叶绿素含量变化,通过分析不同品种(红花大金元、K326和云烟85)在不同变黄温度(34℃、36℃、38℃、40℃和42℃)下烟叶叶绿素含量变化,建立了烟叶叶绿素降解动力学模型。试验结果表明:(1)随着变黄温度的升高烟叶叶绿素降解加快,变黄温度较低时(34℃、36℃)烟叶叶绿素降解存在延滞期,高温变黄(40℃、42℃)不存在延滞期;相同变黄温度下,云烟85烟叶叶绿素降解最快,K326次之,红花大金元最慢。(2)利用一阶反应模型可以很好地描述变黄期烟叶叶绿素含量变化,随着变黄温度升高烟叶叶绿素降解半衰期t1/2缩短,红花大金元、K326和云烟85烟叶叶绿素降解活化能分别为61.76、56.20和53.16 kJ/mol;(3)试验建立了基于温度波动变化的叶绿素降解反应模型,为预测实际变黄过程中烟叶叶绿素含量变化提供理论参考。In order to study the yellowing characteristics of different tobacco varieties and predict the changes of chlorophyll content during the yellowing stage.Changes of flue-cured tobacco leaves'chlorophyll content in different varieties(Honghuadajinyuan,K326,Yunyan85)under different yellowing temperature(34℃,36℃,38℃,40℃and42℃)were analyzed,and the degradation kinetic model of flue-cured tobacco leaves'chlorophyll was established.The results showed that flue-cured tobacco leaves'chlorophyll content got a faster degradation with the increase of yellowing temperature.There was a lag phase of flue-cured tobacco leaves'chlorophyll degradation at the low yellowing temperature(such as34℃and36℃),however,there was no lag phase at the high yellowing temperature(such as40℃and42℃).The chlorophyll degradation of the Yunyan-85variety was the fastest,followed by the variety of K326,and the variety of Honghuadajinyuan got the slowest degradation.The first-order reaction kinetic model can well describe the variation of flue-cured tobacco leaves'chlorophyll content during the yellowing stage.The half-life(t1/2)of flue-cured tobacco leaves'chlorophyll degradation was shortened with yellowing temperature increased.The chlorophyll degradation activation energy of the varieties of Honghuadajinyuan,K326and Yunyan85leaf were61.76,56.20and53.16kJ/mol respectively.The chlorophyll degradation reaction model based on the variation of temperature fluctuation was established in the test,which could provide a theoretical reference for the accurate prediction of the changes of chlorophyll content in tobacco leaves during the yellowing stage.

关 键 词：烤烟 变黄期 叶绿素 降解动力学 模型 

分 类 号：TS441[农业科学—烟草工业]