49th TWC, Tob. Work. Conf., 2020, abstr. 14

Characteristics of main chemical components of flue-cured tobacco leaves and their relationship with smoke sensory quality in Guizhou, China

DAI H.X.; LV D.S.; XU W.; WU S.M.; LIU Y.; LIANG T.B.; ZHANG S.X.; ZHANG Y.L.
Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou China

As the second largest tobacco growing area in China, tobacco leaf production in Guizhou province play an important role on the cigarette industry. In this study, 523 cut leave samples (C3F) from the main growing regions of Guizhou were collected from 2016 to 2018. The characteristics of main chemical components were studied and their relationships with smoke sensory quality indexes were analyzed. The results indicated that the chemical components of the leaf samples were generally harmonious, while more than half of the samples had a starch content higher than 6%, a potassium (K) content lower than 1.5% and a chlorine (Cl) content lower than 0.25%; 39.77% of the samples with a sugar/alkali ratio higher than 12%, and the samples with reducing sugar/total sugar ratio less than 0.80 accounted for 31.36%. The chemical compositions varied greatly with growing regions, cultivars and years. Samples from the southwest Guizhou showed lower nicotine content and higher sugar/alkali ratio than other regions. The cultivar Jiucaiping No. 2 exhibited different chemical composition compared with other varieties. The higher nicotine, total nitrogen, starch, ratios of K/Cl and reducing sugar/total sugar were observed in 2017 and 2018 than those in 2016. The smoke sensory quality was positively correlated with the contents of reducing sugar, total sugar, Cl, sugar/alkali ratio and nitrogen/alkali ratio, which suggested that higher sugar and Cl content, higher sugar/alkali ratio and nitrogen/alkali ratio favored for the improvement of sensory quality of cutter tobacco leaf in Guizhou province. (Reprinted with permission)