Different Yellowing Time On The Effects Of Baking Of Intensive Curing Barn

This study examines Yanshan county of Yunnan province to produce smoke zone baking technology present situation, the system analysis of the different baking yellowing time advantages and existing problems of baking process, comprehensive evaluation optimal yellowing time impact on the quality of flue-cured tobacco, reference experience and advanced provinces and cities similar test in developed countries and the latest research results, put forward the best yellow time, to provide technical reference for the local baking process. Specific for:yellow time T1 (extended 6 h), T2 (extended 12 h) and T3 (extended 18 h), T4 (extended 24 h), CK (extension), the main results were as follows:1 Different yellowing time baking tobacco leaf chlorophyll, water in the process of dynamic change researchMiddle leaves and upper leaves in different yellowing time baking process, T1,T2, T3, T4 tobacco leaf chlorophyll, dynamic changes and CK difference is small; T1, T2 tobacco moisture dynamic variation with no difference between the CK, T3, T4 because yellow time is too long, late leaf water loss rate is slow, affect the curing barn raising temperature platoon is wet, tobacco moisture dynamic variation and CK differences, is not conducive to high quality tobacco baking.2 Different yellowing time on roast tobacco physical indicators and appearance quality influenceCentral leaves turn yellow in different time after baking, after baking tobacco leaf stem ratio and equilibrium moisture content affected by baking yellowing time is small, strong stability; Blade thickness is affected by baking yellowing time, relatively poor stability; Leaf weight of T1, T2 below the T3, T4, CK, tobacco good combustibility and filling, and T1, T2 tobacco leaf weight variation coefficient is small, stability is better than T3, T4, CK; C3F grade between different processing both T1 and T2 processing minimum variation coefficient, the indicators of each processing blade thickness difference is small, equilibrium moisture content in T1, T2 is more appropriate, including stem rate is lowest in T2, T2 in leaf thickness, equilibrium moisture content, including rate of stem and leaf weight index of several poor youngest, discrete minimum degree. T2 after baking the physics properties of tobacco leaves, the optimal processing. At different time after baking yellowing leaf tobacco appearance quality to T2 processing performance of the optimal, T1, T3, T4 and contrast difference, T3, T4 treatment after baking tobacco appearance quality comprehensive score was slightly lower than that of CK;Upper leaves turn yellow in different time after baking, stem content between different processing and equilibrium moisture content of the difference is small, coefficient of variation is below 11%, strong stability; The mean blade thickness difference; B2F level between different processing all the indicators are processed with T1, T2 minimum variation coefficient, the blade thickness is moderate, difference is small, balance water are suitable, terrier content in T2 lowest, from the point of various indicators of poor, T2 in leaf thickness, equilibrium moisture content, including rate of stem and leaf weight index of several poor youngest, discrete minimum degree. At different time after baking yellow tobacco appearance quality also with T2 processing performance is optimal.3 Different yellowing time impact on roast tobacco leaf chemical componentsCentral leaves turn yellow in different time after baking, yellowing time is too long lead to tobacco inclusions consumes excessively, prolonged yellowing of alkali than total nitrogen, nicotine, nitrogen content, or the ratio of high and low impact, extend yellowing time can significantly reduce the content of chlorine; With the extension of yellowing time after baking the potassium content in tobacco was lower after the first rise trend, also suggests that yellow long potassium content increase; T2, the optimum processing sugar alkali ratio and T4 ratio is low; Prolonged yellowing can significantly increase the flammability of tobacco leaves, each index traits to T2, the optimal processing.Upper leaves turn yellow in different time after baking, B2F tobacco between 22.38% and 26.45% of total sugar content, total sugar content is slightly higher than middle lobe, T1, T2, CK, total sugar content was significantly higher than that of T3, T4, it is similar to central lobe results, reducing sugar content in T1, T2, T3 is significantly higher than CK content, T4; Upper leaves after prolonged yellowing can significantly improve roast tobacco leaf total nitrogen content, prolonged yellowing of nicotine, starch content, or the ratio of high and low impact is not big, extended appropriately yellowing time can significantly reduce the content of chlorine, the yellow long potassium content increase; T2, the optimum processing sugar alkali ratio lowest long yellow time T4 ratio can significantly increase the flammability of upper leaves, comprehensive chemical characteristics of each index in T2 processing after the tobacco baking optimal effect.4 Different yellowing time impact on the content of neutral aroma of roasted tobacconeophytadiene content between Central 1348.62-1425.30ug/g, T1, T2, CK neophytadiene was significantly higher than T3, T4, which is due to T3, T4 cause yellowing prolonged excessive consumption of tobacco inclusions cause; phenylalanine content of T2 was significantly higher than other treatments; yellowing between different treatments browning reaction time, carotenoid content was no significant difference, indicating that the time be extended yellow little effect on its content; T1, T2 processing CYPRESS alkanes were significantly higher than that, there was no significant difference between the two, indicating that an appropriate extension of time can significantly improve the yellowing tobacco CYPRESS alkanes content after roast; T1, T2 handle total aroma significantly higher, T3, T4 treatment aroma total was significantly lower than the control group, suggesting that with the extension of yellowing after time after roast aroma within the total tobacco was first increased and then decreased shows yellowing long time is not conducive to improving the total neutral aroma substances, each indicator integrated with T2 treatment aroma of tobacco roast optimal effect.Upper leaves neophytadiene content between 1188.38-1215.00ug/g, T1, T2, CK neophytadiene was significantly higher than T3, T4, which is also the law of the middle lobe similar performance; phenylalanine content also T2 was significantly higher than other treatments, no significant differences between the other treatments; yellowing between different treatments browning reaction time, carotenoid content was no significant difference, indicating little effect on the extension of yellow time content; T2 processing CYPRESS alkyl class was significantly higher than other groups, T4 treatment CYPRESS alkanes minimum content, no significant differences between the other, indicating that for the purposes of an appropriate extension of the middle leaves turn yellow time can significantly improve the content of tobacco CYPRESS alkanes after baking, but the yellow time CYPRESS not conducive to the accumulation of long alkane content; T1 treatment aroma total significantly higher than other groups, T3, T4 treatment aroma total was significantly lower than the control group, T1 processing neutral aroma is slightly higher than the total amount of control, the difference was not significant, suggesting that with the extension of time after the grilled yellow aroma within the total tobacco increased first decreased, indicating that yellow is not conducive to the long time increase the total aroma substances, each indicator integrated with T2 treatment aroma of tobacco roast optimal effect.5 Different yellowing time impact on baking tobacco cost and energy consumptionMiddle leaves turn yellow in different time after baking, with T2 after baking the highest average price, T2 compared the average price increased by 10.94%, and also to T2 minimum average cost in energy consumption, down 3.31% compared with CK, the comprehensive economic benefits to T2 optimal.Upper leaves under different smoke density after baking, has a better on average T4, T4 average price increased by 4.14% compared with CK, the lowest average cost to T2 on energy consumption, down 5.23% compared with CK, the comprehensive economic benefits to T2 optimal.Taken together extended yellow long 12 h is the most suitable for middle leaves and upper leaves turn yellow time.