Abstract:

In order to master the quality characteristics of main flue-cured tobacco varieties in the core tobacco-growing areas of Kunming, the tobacco leaves of main varieties in five counties (cities) with similar ecological conditions were taken as the research objects. The characteristics of tobacco leaves of ‘Honghua Dajinyuan’, ‘K326’, ‘Yunyan 87’, ‘NC102’ and ‘NC297’ were systematically analyzed from the aspects of appearance quality, physical characteristics, polyphenol content, plastid pigment, aroma components and sensory quality. The results showed that the five main flue-cured tobacco varieties in Kunming had their own characteristics in appearance quality, physical properties, internal chemical composition and sensory quality of tobacco leaves. ‘NC297’ had good maturity, and ‘Yunyan 87’ had obvious dark orange color and loose leaf structure. The tensile strength and tensile resistance of the upper leaves of ‘NC297’ were significantly better, and the filling value of ‘K326’ and ‘Honghua Dajinyuan’ was higher. The content of scopoletin in ‘K326’ tobacco leaves was significantly higher, and the content of scopoletin and β-damascenone in ‘Honghua Dajinyuan’ tobacco leaves was significantly lower. The contents of heterocyclic and β-damascenone in the middle leaves of ‘NC102’ were significantly higher. The ‘Honghua Dajinyuan’ tobacco leaves had outstanding sweetness and elegant aroma; the burnt aroma of ‘K326’ tobacco leaves was obvious and the concentration was high. ‘Yunyan 87’ tobacco leaves had obvious sweet fragrance; the fragrance of ‘NC102’ tobacco leaves was obvious; the burnt sweet aroma of ‘NC297’ tobacco leaves was exposed with a lingering fragrance. There were significant differences in maturity, leaf structure, tensile strength, filling value, scopoletin content, β-damascenone content, aroma components and sensory quality among the five main flue-cured tobacco varieties in the core tobacco area of Kunming. It can provide a basis for rational distribution of planting structure of flue-cured tobacco varieties, mining the characteristics of high-quality tobacco leaves, and purchasing high-quality raw materials for cigarette industry enterprises.

Key words: Kunming tobacco area, main cultivars, tobacco leaf, aroma characteristics, quality characteristics, industrial usability