Abstract:

In order to better understand the quality characteristics of tobacco varieties in Kunming, this paper      figured out CCUI (chemical component index validity) representing tobacco leaves quality using principle component analysis and fuzzy mathematical method; and  carried out comprehensive evaluation on chemical component usability of flue\|cured tobacco varieties including Kunming K326, Honghuadajinyuan(Hongda), Yunyan 87, NC102 and NC297; and analyzed the relationship between major chemical components and pigment, polyphenol. The result indicated that: ①the average concentration of total sugar, potassium, chlorine and the ratio of potassium to chlorine were at an appropriate level, while the reducing sugar and nicotine were high, and the content of total nitrogen, ratio of sugar to nicotine and ratio of nitrogen to nicotine were low; ②the proportion of chemical component usability grades Ⅰ~Ⅳ of flue\|cured tobacco leaves in Kunming  were 5%, 31%, 50%, 14%, respectively. The average CCUI was 05159, and CCUI in different varieties were Hongda> Yunyan87> K326> NC297> NC102; ③the contents of lutein, β\|carotene were significant or highly significant negative correlation with the contents of chlorine and nicotine, while were significant positive correlation with ratio of sugar to nicotine, ratio of nitrogen to nicotine, and ratio of potassium to chlorine.

Key words: flue\, cured tobacco, chemical composition, latent fragrant substances, usability

摘要：

为更好地认识昆明市烤烟品种质量特征，运用模糊数学和主成分分析方法计算出代表烟叶质量状况的CCUI值（化学成分可用性指数），对昆明市烤烟品种K326、红花大金元（红大）、云烟87、NC102和NC297的化学成分可用性进行综合评价，分析了主要化学成分与色素、多酚的关系。结果表明：①昆明烟叶总糖、钾、氯含量和钾氯比适宜，还原糖和烟碱偏高，总氮含量和糖碱比、氮碱比稍低。②昆明市烟叶化学成分可用性指数Ⅰ、Ⅱ、Ⅲ和Ⅳ级比例分别为5%、31%、50%和14%，CCUI平均值为0.5159，品种间CCUI表现为：红大>云烟87>K326>NC297>NC102。③叶黄素、β\|胡萝卜素与氯和烟碱含量呈显著或极显著负相关，与糖碱比、氮碱比和钾氯比呈极显著正相关。

关键词: 烤烟；化学成分；潜香型物质；可用性