工业等级烟叶质量的主成分分析和聚类分析评价

The Evaluation of Principal Components Analysis and Cluster Analysis on Industrial Grading of Flue-cured Tobacco

[目的]对不同工业等级的烟叶进行初步质量评价。[方法]选取总糖、施木克值、糖碱比、香气量、香气质、杂气、刺激性、成熟度、身份、油分10个烟叶质量指标,以SPSS软件为工具,运用主成分分析法和Q型聚类分析对韶关市始兴县14个不同工业等级标准的烟叶质量进行评价。[结果]分析表明,按累积贡献率≥85%的标准,筛选出化学成分因子、感官质量因子、烟气成分因子共3个主成分,其对变异的累积贡献率达95.04%。不同等级的烤烟烟叶的综合评价得分差异明显,其中MO1、CF1、MF2 3个等级烟叶质量得分高于其他等级烟叶,而XO2、XF2、XO3 3个等级烟叶质量得分则低于其他等级烟叶。聚类分析结果表明,14个不同等级样品分为3类,其中第1类有CF2、MO2、CO1、MO3、MF2、MF3、CO2、ML2;第2类有MO1、MF1、CF1,第3类有XF2、XO3、XF3。[结论]研究可为工业等级烟叶质量评价提供参考。

[Objective] The quality of different industrial grading tobacco was evaluated.[Method] Selecting 10 tobacco quality indicators,such as total sugar,Shmuck value,ratio of sugar to nicotine,aroma quantity,aroma quality,mixed gas,irritation,maturity degree,identity,oil,using SPSS software as tool,adopting principle component analysis method and Q type cluster analysis,tobacco quality of 14 industrial grading criteria in Shixing County,Shaoguan City was evaluated.[Result] The results showed that three principal components with accumulative contribution rate over 85％ were obtained,named chemical component,sensory component and smoke component,their accumulative contribution rate over 95.04％.The comprehensive scores of the flue-cured tobacco leafs were different obviously.The quality evaluation of MO1,CF1,MF2 were better than others ; The quality evaluation of XO2,XF2,XO3 were poorer than others.The results of Q cluster analysis showed,these samples were divided into three categories,the first category included CF2,MO2,CO1,MO3,MF2,MF3,CO2,ML2 ;The second category included MO1,MF1,CF1 ; The third category included XF2,XO3,XF3.[Conclusion] The study can provide reference for industrial grading tobacco quality evaluation.