Abstract: Study on quality character of leaf for different types of aroma was conducted by using the methods of principal factors’ analysis and regression analysis, with 16 leaf chemical components, 4 quality indicators and 6 indicators of smoking quality of 366 leaf samples for leaf of 4 types of aroma in Guizhou province. The results showed that the difference with 4 types of aroma were remarkable among contents of chemical components, quality indicators and smoking quality of leaf. Their first principal factors of leaf chemical components were similar, revealing that leaf quality was mainly influenced by the carbohydrates and nitrogen-containing compounds. Their factors from second to seventh principal ones were very different, revealing that the near relationship between different types of leaf aroma and its chemical components. The smoking quality of leaf of 4 types of aroma showed obvious correlation with different chemical components, revealing that the smoking quality of leaf of different types of aroma was provided with different main relative factors under the mutual influence of ecological condition and culture techniques.

Key words: Guizhou, tobacco leaf, type of aroma, quality