安徽农业科学2016，Vol.44Issue(36)：35-38,4.
施氮量对烤烟烟叶抗氧化系统及质量的影响
Effects of Nitrogen Application Level on the Antioxidant Defense System and Quality of Flue-cured Tobacco Leaves
摘要
Abstract
Objective] To research the effects of nitrogen application level on the antioxidant defense system and quality of flue-cured tobacco leaves.[ Method] Taking K326 as experimental materials,we researched the effects of different nitrogen application levels on active oxygen con-tent,SOD activity,GR activity,APX activity,antioxidants content and chemical components in tobacco leaves.[Result] With the growth and rip-ening of tobacco leaves in fields,generation rate of O2 -· and content of hydrogen peroxide of tobacco leaves presented increasing trend .Activi-ties of SOD,GR and APX increased firstly,and then decreased.Content of AsA increased at early growth stage and decreased gradually at late growth stage.Nitrogen application level had significant effects on antioxidant defense system.The contents of free radical scavenger (GSH,AsA) and activity of related enzymes (SOD,GR,APX) of antioxidant defense system at high nitrogen level were significantly or extremely significantly higher than those at low nitrogen level.With the increasing of nitrogen application level,the contents of nitrogen compounds of cured tobacco leaves increased significantly,while degradation amount of macro molecular substance decreased ,such as protein,starch,chlorophyll and carote-noid,and the content of petroleum ether extract also reduced.However,it showed no significant impacts on potassium and chlorine.Thus,the quality of tobacco leaves reduced.[ Conclusion] In field management of flue-cured tobacco,rational application of nitrogen fertilizer (45.0 kg/hm2 ) is beneficial to keep the higher activity of antioxidant defense system to resist stress at early growth stage ,mature timely at mature peri-od,and improve the quality of tobacco leaves.关键词
烤烟/氮/抗氧化系统/化学成分Key words
Flue-cured tobacco/Nitrogen/Antioxidant defense system/Chemical components分类
农业科技引用本文复制引用
李利建,王涛,毛岚,李凌,赵应虎,赵友谊,任情,刘建军,张宏景..施氮量对烤烟烟叶抗氧化系统及质量的影响[J].安徽农业科学,2016,44(36):35-38,4.基金项目
中国烟草公司云南省公司项目（2014YN23）。 （）
