重庆烟区适宜贮存期烟叶致香成分分析
Analysis of flavor components in flue-cured tobacco leaves of suitable storage period in Chongqing tobacco-growing areas
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摘要: 采用SDE-GC-MS对重庆烟区适宜贮存期烟叶致香成分含量进行测定,对测定的致香成分进行描述性统计分析;利用主成分分析法筛选致香成分特征指标,并对其进行差异显著性分析、多重比较和聚类分析.结果表明:烟叶中检出的63种致香成分含量差异较大,上部烟叶和中部烟叶致香成分变异系数的范围分别为12.12%~59.97%和10.41%~73.25%;烟叶产地、年份、品种、等级四因素对致香成分的影响差异较大,不同因素对致香成分的影响程度依次为产地>年份>品种>等级,而相同部位不同等级的烟叶致香成分几乎无显著性差异;上部烟叶致香成分特征指标含量丰都较高,涪陵其次,武隆最低,中部烟叶致香成分特征指标含量黔江较高,南川其次,武隆最低;上部烟叶和中部烟叶均划分为3类,上部烟叶第一类包含丰都、南川,第二类包含武隆、彭水、黔江,第三类为涪陵,中部烟叶第一类包括丰都、南川、黔江,第二类为武隆、涪陵,第三类为彭水,类别间差异显著性高.Abstract: SDE-GC-MS was used to determine the content of flavor components in flue-cured tobacco leaves of suitable storage period in Chongqing tobacco-growing areas, and descriptive statistical analysis was carried out for the determined flavor components. Principal component analysis was used to screen the characteristic indexes of flavor components, and the difference significance analysis, multiple comparison and cluster analysis were carried out for the selected characteristic indexes. The results showed that there were significant differences in the content of 63 flavor components in tobacco leaves, and the variation coefficients of flavor components in upper and middle tobacco leaves were 12.12%~59.97% and 10.41%~73.25% respectively. There were significant differences in the region, aged time, cultivar, and grade of tobacco leaves, and the influence degree of different factors were region>aged time>cultivar>grade, but there was almost no significant difference among the grades within the position. Characteristic index content of flavor components in upper tobacco leaves of Fengdu was higher, Fuling was the second, Wulong was the lowest.Characteristic index content of flavor components in middle tobacco leaves of Qianjiang was higher, Nanchuan was the second, Wulong was the lowest. The upper and middle tobacco leaves were divided into three categories.The first category of upper tobacco leaves includes Fengdu and Nanchuan, the second category includes Wulong, Pengshui and Qianjiang, the third category is Fuling.The first category of middle tobacco leaves includes Fengdu, Nanchuan and Qianjiang, the second category includes Wulong and Fuling, and the third category includes Pengshui, with high significant differences between categories.
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