摘要
通过控制烟叶在变黄-褐变期的晾制湿度,研究了晾制过程中湿度对白肋烟中烟碱向降烟碱转化的影响。结果表明,不同晾制湿度下高转化株主脉的烟碱转化率均高于叶片,非转化株除低湿处理B21的第15叶位外,其余处理烟碱转化率表现出与高转化株相同的趋势。高转化株叶片烟碱含量在低湿处理时最高,非转化株叶片烟碱与降烟碱含量皆因品种与叶位的不同而存在差异。无论是高转化株还是非转化株,较低的晾制湿度均有利于降低叶片的烟碱转化率;晾制湿度对烟叶主脉中烟碱、降烟碱及烟碱转化率的影响,因试验品种的不同而异。因此,晾制过程中及时降低晾制湿度有利于降低烟叶的降烟碱含量。
By controlling the air humidity during yellowing and browning stage, the effect of humidity on nicotine to nornicotine conversion in burley tobacco were studied. The results showed that the rate of nicotine conversion （RNC） in midrib of high-converter was higher than that in lamina under different air humidity, it was also true of non-converter, except for the fifteenth leaf of B21 cured under low air humidity. The nicotine content in high-converter lamina treated under low air humidity was the highest, while that in non-converter lamina was dependent on varieties and stalk positions. Lower air humidity was of benefit to decreasing the RNC in lamina of high-converter or non-converter. The effect of air humidity on the contents of nicotine, nornicotine and RNC in midrib varied in different varieties. Therefore, timely reducing air humidity during curing would be beneficial to reducing the nornicotine content in tobacco leaf.
出处
《烟草科技》
EI
CAS
北大核心
2008年第6期46-50,共5页
Tobacco Science & Technology
基金
国家烟草专卖局资助项目“烟草烟碱转化及生物碱优化技术研究”(11020041013)
关键词
白肋烟
晾制湿度
烟碱
降烟碱
主脉
叶片
Burley tobacco
Air-curing humidity
Nicotine
Nornicotine
Midrib
Lamina
