Study On The Changes Of The Routine Chemical Composition And Neutral Aroma Components In The Process Of Fermentation Of Maduro Cigar Wrapper-leavies

To study the changes and effect of the main routine chemical composition and neutral aroma components in the process of fermentation of Maduro cigar-wrapper,we planed the test in the Henan Agricultral University national physiological and biochemical experiment base among 2015-2016,the results are as follows:1.The changes of the main routine chemical composition during the process of fermentation in Maduro cigar-wrapper.(1)During the process of fermentation,the total nitrogen content continued to decrease,especially during 0d-20 d,then the rate of decline slowed and stabilized,the content of total sugar in medium thick and thin Maduro cigar-wrapper decreased rapidly during 20-40 d,from2.5% to1.5%,then the content remained stable,the content of total sugar in thick Maduro cigar-wrapper decreased rapidly during 0d-20d;The maximum ratio of potassium to chlorine was 9.36,the minimum ratio of potassium to chlorine was 2.59,the ratio was appropriate,it showed that the combustion was good,the ratio of sugar to nicotine and the ratio of sugar to nitrogen fluctuated during the process of fermentation,ratio of Total Nitrogen to Nicotine was stable.(2)During the process of fermentation,the content of nicotine fluctuated,in addition,the nicotine content of thick Maduro cigar-wrapper was slightly higher than before fermentation,the contents of nicotine in the medium and thick Maduro cigar-wrapper were decreased,this may be that thick Maduro cigar-wrapper has more abundant inclusions,the degradation of nicotine is slow.2.The changes of the neutral aroma components during the process of fermentation in Maduro cigar Wrapper-leavies.During the process of fermentation,the content of neophytadiene was the highest among aroma compounds,then the carotenoid degradation products,cembranoids degradation products,phenylalanine degradation products,the content of browning reaction products is the lowest,about70% of the total aroma substances is neophytadiene,the change trend of neophytadiene fluctuated,it was similar to other aroma substances.The components of neutral aroma in the thick and middle thick Maduro cigar-wrapper descend during the early stage,then increased again,and reached second peak at 40 d,its color was deep after fermentation at this time,increased the availability of its appearance.The neutral aroma components in the thin Maduro cigar-wrapper reached second peak at 50 d,its color was deep after fermentation at this time,it reached the standard for dark cigar-wrapper.3.Sensory quality evaluation of Maduro cigar-wrapper after fermentationAfter fermentation,the aroma quality of Maduro cigar-wrapper was improved,the miscellaneous gas became smaller,smoke became soft and delicate,the taste became mellow,and the aftertaste became comfortable and clean,combustibility also got greatly improved.The strength and irritancy of thin Maduro cigar--wrapper was more smaller than others,maybe due to the progress of fermentation,thick Maduro cigar-wrapper has more abundant inclusions,however,the loss of dry matter is also great,especially the loss of carbohydrates,therefore nitrogen compounds in the proportion of tobacco increased.The results showed that the performance of thin Maduro cigar-wrapper was the best,the strength and the irritancy decreased,the aroma quality was good,the combustibility was also improved,it plays an important role in adjusting cigar flavor.