中文摘要：

[目的]为了解云南中烟基地单元烟叶的内在化学成分质量状况，[方法]采集76个在滇原料基地的C3F烟叶样品并进行常规化学成分分析。采用基于云南中烟卷烟品牌H1、H2的隶属函数及层次聚类分析进行评价。[结果]结果表明：①76个基地单元主要化学成分总体协调。②H1品牌烤烟原料总氮比优质烟叶高12．08％;H2、H3品牌烤烟原料符合云南优质烟叶范围：H4品牌烤烟原料总糖、还原糖分别高出优质烟叶0．76％、10.3％。（勤烟叶总糖、还原糖、钾,G1集团基地分别比G2集团基地高38．1％、2．27％、7.34％；总氮、氯分别低4．69％和11．11％；烟碱相近。④H2与H3主要化学成分差异不显著;H3与H4主要化学成分除总氮差异显著差异外,其余差异均不显著；H4与H2无显著性差异。[结论]G2和G1集团基地单元烟叶较优,可为基地单元的建设提供理论参考。

英文摘要：

[Objective] This study was conducted to investigate the quality condition of chemical components of tobacco in Yunnan. [Method] The C3F samples were collected from 76 base units in Yunnan Province and their conventional chemical components were analyzed, and the evaluation was carded out based on the membership function and hierarchical cluster analysis of cigarette brands H1 and H2 in Yunnan. [Result] The results showed that： （1） Major chemical components of 76 base units were coordinated overall. （2） Total nitrogen of brand H1 was higher than that of the high-quality tobacco leaves by 12.08%; raw tobacco of brands H3 and H2 satisfied the quality requirements of high-quality tobacco in Yunnan; and the total sugar and reducing sugar in flue-cured tobacco of brand H4 were higher those of the high-quality tobacco leaves by 0.76% and 10.3%, respectively. （3） The total sugar, reducing sugar and potassium of tobacco leaves from bases of G1 group were higher than those of tobacco from bases of G2 group by 38.1%, 2.27% and 7.34%, respectively; and total nitrogen and chlorine were lower by 4.69% and 11.11%, respectively; and nicotine contents in tobacco of the two groups were similar. （4） H2 and H3 were not significantly different in main chemical components; H3 and H4 were significantly different in total nitrogen, while other main chemical components were not significant different; and there were no significant differences between H4 and H2. [Conclusion] The quality of tobacco leaves from tobacco base units of G1 and G2 groups was better. Therefore, the evaluation provides theoretical reference for construction of tobacco base units.