Study On Regional Characteristic Of Flue-cured Tobacco Quality In Sichuan Province Tobacco-growing Areas

This paper took B2F, C3F, X2F from 27 Sichuan tobacco growing areas in 2009 as tested materials. Descriptive statistics, multiple comparison, cluster analysis, principal component analysis, canonical correlation were used to analysis regional characteristics of appearance quality, smoking quality and routine chemical components, investigate the relationship between routine chemical components, derivative and smoking quality, compare volatile aroma and flavor constituents difference among different tobacco growing areas. The results as follows:1.Tobacco leaf appearance characteristics. As B2F and C3F were concerned, color of Liangshan was in orange color gamut and the difference with rest areas was significant. Color of Luzhou was in lemon yellow color gamut. Maturity of Liangshan was in mature grade and the difference with rest areas was significant, while other areas were in full maturity or lacking ripe grade. Leaf structure of Liangshan and Pan Zhihua were in loose grade basically and the difference with rest areas was significant while other areas were in lacking loose grade. Identity were all in moderate grade. Oil were all in oily to less oily grade. Chroma of Liangshan was in strong grade, while other areas took second place.As X2F was concerned, Yibin was in orange color gamut and the difference with rest areas was significant. Color of Luzhou was in lemon yellow color gamut. Maturity of Yibin was in mature grade and the difference with rest areas was significant, while other areas were in full maturity or lacking ripe grade. Leaf structure of Yibin was in loose grade basically and the difference with rest areas was significant while other areas were in lacking loose grade. Identity of Liangshan was in moderate grade. Identity of Guangyuan was in fleshy or thin grade. Oil were all in oily grade. Chroma of different areas were in strong grade, while the differences among them were not significant.2.Tobacco leaf internal quality characteristics. As B2F was concerned, strength of Yibin was in greatish category, while other areas were in great category. Smoke concentration were all in less strong category. Aroma quality of Panzhihua and Liangshan were in good category, while other areas were in less good category. Aroma quantity of Panzhihua and Liangshan were in more category, while other areas were in less more category. After-taste of Panzhihua and Liangshan were in less easiness category, other while other areas were in little easiness category.As C3F was concerned, strength were all in greatish category. Smoke concentration were all in strong category. Aroma quality were in good category, while other areas were in less good category. Aroma quantity were all in more category. After-taste of Yibin was in little easiness category, while other areas were in less easiness category. Offensive odor of Panzhihua and Liangshan were in least category, while other areas were in little category. Irritation property of Yibin was in a little category, while other areas were in little category. Sweetness were all in medium to little strong category.3. Tobacco leaf chemical quality characteristics. Regional characteristics of routine chemical components was studied using B2F as materials. The order of total sugar was Panzhihua, Liangshan, Guangyuan, Luzhou, Yibin. Total sugar content of Guangyuan, Panzhihua and Liangshan were higher than average. There were significant difference between Panzhihua,Liangshan and other areas. The order of reducing sugar content was Liangshan, Guangyuan, Panzhihua, Yibin and Luzhou. The order of nicotine content was Yibin, Luzhou, Liangshan, Guangyuan and Panzhihua. Nicotine content of Yibin was higher. The order of sugar-nicotine ratio was Guangyuan, Panzhihua, Liangshan, Luzhou and Yibin. The sugar-nicotine ratio of Yibin was lower. The order of chlorine was Panzhihua, Guangyuan and Luzhou, Yibin, Liangshan. The order of potassium was Panzhihua and Luzhou, Yibin, Guangyuan, Liangshan. The order of potassium-chlorine ratio was Guangyuan, Panzhihua, Liangshan, Luzhou, Yibin (B2F), Liangshan, Luzhou, Panzhihua, Yibin, Guangyuan(C3F), Liangshan, Luzhou, Yibin, Panzhihua, Guangyuan(X2F).The order of total nitrogen was Yibin, Luzhou, Guangyuan, Liangshan, Panzhihua(B2F), Yibin, Luzhou, Guangyuan, Liangshan, Panzhihua(C3F),Luzhou, Yibin, Guangyuan Liangshan, Panzhihua(X2F).The order of nitrogen-nicotine ratio was Panzhihua Guangyuan, Liangshan, Luzhou, Yibin(B2F), Luzhou, Guangyuan, Liangshan, Panzhihua, Yibin(C3F)Panzhihua, Guangyuan Luzhou, Liangshan, Yibin(X2F). 4.Relationship between routine chemical components and smoking quality. Canonical correlation analysis was used to choose several integrated variables, replace the correlation between two group variables. There was a close relationship between strength and nicotine, nitrogen-nicotine ratio. As strength increased, total-sugar content decreased significantly and nicotine, nitrogen-nicotine ratio increased significantly, but sweetness was reversed. As nicotine increased, after-taste and irritation property increased significantly.5 Neutral aroma components characteristics. Spend time zone of 5 to the volatile incense component principal component analysis:Guangyuan volatile aroma compositions were in scoring and the principal components across volatile aromatic substance sample with the total score of the comprehensive quality of Taigong scores highest best 1.88, Chengbei is a bit low, for-4.68; Yibin smoke area:the aroma of tobacco leaf next creek township comprehensive quality is best, scores highest since, fall a wood, low, soft town for-tools; Luzhou smoke area:hemp town Macheng village aroma of tobacco leaf comprehensive quality is best, scores highest 0.685, water, for the 0.558 ZhongNa village for-scoring, aroma of tobacco leaf quality is poorer; Panzhihua smoke area:the room of TianCun field township large comprehensive aroma of tobacco leaf quality is best, scores highest tools, Dalongtan, dry bazi village aroma of tobacco leaf quality score for-the worst and the 1.683; Liangshan smoke area:bamboo longevity government point aroma of tobacco leaf quality best, scores highest comprehensive, TaiPing 0.015, goose aroma of tobacco leaf quality score for-the worst and the 0.021.