Abstract:

To reveal the formation law of aroma components and improve the aroma quality of winter flue-cured tobacco, SDE (simultaneous distillation extraction)-GC/MSD gas chromatography-mass spectrometry was used to detect the aroma components and relative contents of flue-cured tobacco leaves in four different transplanting periods under the same cultivation and preliminary test condition in the same production area. The results showed that: the total amount of aroma components was in good agreement with the sensory evaluation results, which might play a basic role in the overall aroma quality of winter tobacco; the content of neophytadiene in K3 treatment (transplanting on January 15 next year) was significantly higher than that in the other three treatments, and the smoking evaluation quality of flue-cured tobacco leaves was better, indicating that the neophytadiene content might play a leading role in the overall aroma quality of winter tobacco; the content of damascus in carotenoid degradation products was higher than that in the other three treatments, among them, ketone, geranyl acetone, 3-hydroxydamascene and linalool; solanone in cedarane like aroma compounds; furfural, 2,3-dihydrofuran, 5-methyl-2-furfural, 3-methyl-2 -(5H) - furanone and 2,3-dihydrofuran in Maillard reaction products, 3-dihydrobenzofuran; benzaldehyde, benzyl alcohol, phenylacetaldehyde, phenylethanol and indole in the degradation products of phenylalanine; 2-acetylfuran, durene, methyl palmitate, geranyl geranyl pyrophosphate, palmitic acid, etc. in other aroma compounds may be important components affecting the aroma quality of flue-cured winter tobacco leaves. This study could provide a scientific basis for optimizing winter tobacco cultivation technology, improving the aroma quality of winter tobacco leaves and the usability of upper leaves.

Key words: ‘KRK26’, aroma constituents, winter flue-cured tobacco, relative content