氮用量对晒红烟生理特性的影响  

Effects of Nitrogen Rates on Physiological Characteristics of Dark Sun_cured Tobacco

作　　者：方明 符云鹏 刘国顺 田峰 吕启松 

机构地区：[1]国家烟草栽培生理生化研究基地 [2]湖南省湘西自治州烟草公司烟草科学研究所,湖南省吉首市416000

出　　处：《烟草科技》2006年第2期46-49,共4页Tobacco Science & Technology

基　　金：国家烟草专卖局资助项目(110200101003B);"湖南名晒烟深度开发利用研究"的一部分。

摘　　要：采用盆栽试验研究了氮用量对晒红烟生理特性的影响。结果表明,随着氮用量的增加,硝酸还原酶(NR)活性、转化酶活性(INV)和叶绿素含量呈上升趋势,但团棵期大于150kg/hm2施氮水平处理的烟叶NR活性下降,不施氮和195kg/hm2施氮水平处理的烟叶NR/INV比值较低。在一定范围内,可变荧光(Fv)与固定荧光(Fo)的比值(Fv/Fo)和可变荧光与最大荧光(Fm)的比值(Fv/Fm)均随施氮量增加而递增,但旺长期以前氮用量大于150kg/hm2的处理Fv/Fo和Fv/Fm的比值反而降低。The effects of nitrogen rates on the physiological characteristics （including chlorophyll fluorescence） of dark sun-cured tobacco were studied with pot experiments. The results showed that with the increase of 51 rates, the NR activity, INV activity and chlorophyll content of fresh leaves were enhanced gradually, however, the NR activity decreased in case of high N application and the NR/INV ratio was lower in either case of no or high nitrogen application at rosette stage. The values of Fv/Fo and Fv/Fm increased with the increase of N rates in a certain range, while the values decreased when the N rate was over 150kg/hm^2 before fast growing stage.

关 键 词：晒红烟 氯用量 生理特性 叶绿素 

分 类 号：S572.01[农业科学—烟草工业]