Abstract:

The regional characteristics of tar contents were analyzed by collecting the total of 195 flue-cured tobacco samples with 3 grades(B2F, C3F, X2F) in 2007 from Hunan tobacco-growing areas. The results showed that the means of tar contents in the flue-cured tobacco leaf of B2F, C3F, X2F were 19.94 mg/cigarette,15.93 mg/cigarette, 11.58 mg/cigarette, respectively. The coefficient of variation of C3F and X2F were big. The difference of B2F and C3F were not significant but the difference of X2F was extremely significant in different ecological areas. For same grade, the tar contents of flue-cured tobacco leaves in Northwest Hunan was higher and that in Center Hunan was lower than others. The difference of B2F were not significant but the difference of C3F and X2F was extremely significant in different locations. For same grade, the tar contents of flue-cured tobacco leaves in Xiangxi and Changde were the highest, that in Yongzhou and Zhangjiejie were comparative lower. For B2F and C3F grades, the tar contents of flue-cured tobacco leaves in Changshai were the highest, but X2F grade in Changsha was comparative lower. The tar contents of flue-cured tobacco leaf in Hunan tobacco-growing areas is divided into four types with the cluster analysis, less tar contents of lower tobacco leaf, less tar contents of upper and middle tobacco leaf, higher tar contents of lower tobacco leaf, higher tar contents of upper and middle tobacco leaf.