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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (19): 142-147.doi: 10.11924/j.issn.1000-6850.casb2022-0512

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Relationship Between Smoking Quality and Chemical Components of Upper Leaves of Main Flue-cured Tobacco Varieties in Hubei Province

ZHANG Ting(), LI Jinhai(), LIAO Xiaoling, WANG Kang, PENG Longjun, LIU Jun, XIAO Shaohong, CHEN Hui   

  1. Hubei Tobacco Quality Supervision & Test Centre, Wuhan 430030
  • Received:2022-06-27 Revised:2023-01-10 Online:2023-07-05 Published:2023-07-03

Abstract:

In order to determine the key chemical components affecting the smoking quality of the upper leaves of main flue-cured tobacco varieties ‘Yunyan 87' and ‘K326' in Hubei Province, the nicotine, total sugar, reducing sugar, chlorine, sugar-alkali ratio, nitrogen-alkali ratio and other key chemical components of the upper leaves of the two varieties from 2010 to 2020 were determined, as well as the sensory evaluation indicators, including aroma quality, aroma amount, odor, irritation and aftertaste. The main chemical components affecting the quality of upper leaves were detected under statistical analysis. The variance analysis results indicated the occurrence of significant to extremely significant differences between ‘Yunyan 87' and ‘K326' in nicotine, total sugar, reducing sugar, chlorine, sugar-alkali ratio, nitrogen-alkali ratio, potassium-chlorine ratio, and total smoking score of upper leaves. The simple correlation analysis results illustrated that the positive correlation regarding the total smoking score including total sugar, reducing sugar, potassium, sugar-alkali ratio, potassium-chlorine ratio, and two sugar ratio showed significant to extremely significant relations, the negative correlation regarding the total smoking score including nicotine, chlorine, and total nitrogen showed significant to extremely significant relations. The stepwise regression and path analysis results showed that the key chemical indicators affecting the smoking quality of the upper leaves of ‘Yunyan 87' were reducing sugar, potassium and nicotine, and the key chemical indicators affecting the sensory smoking quality of the upper leaves of ‘K326' were potassium, reducing sugar and chlorine. To improve the smoking quality of upper tobacco leaves in Hubei, different treatments should be applied to different varieties. For ‘Yunyan 87', the production should focus on increasing the reducing sugar, regulating carbon and nitrogen metabolism, and synergistically increasing potassium and controlling alkali. For ‘K326', the key is to increase potassium, and moderately raise the reducing sugar and chlorine contents.

Key words: flue-cured tobacco, Hubei, upper leaves, smoking quality, chemical components