The Effect of Composite Enzyme Preparations on the Quality of Tobacco Leaves During the Aging Process of Southern Shaanxi To-bacco
[Objective]Through exogenous spraying of biological agents to process tobacco,explore the influence of flue-cured tobacco modu-lation and rebaking aging stage after the biological treatment on tobacco leaf quality and difference,thus forming the technical means of impro-ving the quality and aromn in the process of tobacco aging,clarify the chemical composition and quality changes of tobacco leaves at different aging times after adding biological agents.[Method]Shaanxi SXC-4 composite biological preparation was selected,including different hydro-lytic enzyme systems,oxidoreductase systems,and aroma enhancing bacteria.The effects of the composite biological preparation on the con-ventional chemical components and special chemical components such as polyphenols,as well as neutral aroma causing substances of tobacco were studied through atomization spraying during the tobacco preparation and re roasting stages.[Result]After the treatment of biological agents at different stages,the content of reduced sugar,total sugar and starch in flue-cured tobacco were lower than the control treatment,and the content of nicotine and total nitrogen was slightly higher than the control treatment.The content of organic acids,neophytadiene and free amino acids in flue-cured tobacco also increased to different degrees compared with the control treatment.The content of neutral aromatization substances in different treatments showed that the total amount of aromatization substances of tobacco leaves treated with compound biological agents was significantly greater than that of control treatment.With the process of aging,the total amount of aroma substances decreased,and the total score of sensory quality was improved.[Conclusion]After the two stages of compound biological agent treatment,they can improve the chemical quality of flue-cured tobacco,increase the aroma substances,improve the aroma quantity and aroma temperament of flue-cured to-bacco,and reduce the mixture and irritation.With the aging time,the aging effect of different treatments is different.After 90 days of aging,the chemical composition of aged tobacco leaves in the reasting stage is more coordinated,the content of aromatic substances is higher,and the sensory quality evaluation of tobacco leaves is higher,which is better than the tobacco leaves treated with biological agents in the modulation stage.
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