Study On The Relationship Between Starch Content And The Quality Of Flue-cured Tobacco

In view of the current problem that starch content of flue-cured tobacco in China is high and the lack of systematic study on the relationship between starch content and quality of tobacco leaf at home and abroad, this research selected flue-cured tobacco leaves from Fujian, Yunnan and Sichuan as test material. The samples were cluster analyzed based on tobacco starch content. The research did Appearance quality evaluation and measured physical indexes, chemical compositions, sensory quality assessment, mainstream smoke particulate matter and flue gas CO. The data was analyzed through SPSS20.0, Office2010 and Minitab 16. The research aims to provide theoretical foundation for the rational utilization of flue-cured tobacco resource and solve the problem of current high starch content in flue-cured tobacco in China. The results were as follows:1. The starch content mutation interval was larger in the middle leaves of different tobacco-growing area, and there was a big difference between different areas of starch content in middle flue-cured tobacco leaves that Yunnan(5.72±0.164%)> Fujian(5.54±0.137%)> Sichuan(5.35±0.143%).2. The relationship was consistent between starch content and appearance quality. When the starch content was lower than 3.8%, the starch content did not affect appearance quality; when the starch content was above 3.8%, the tobacco leaves maturity level, chroma, color, leaf thickness was negatively correlated with the starch content, and was positively correlated with leaf identity.3. There was a negative correlation between starch content of tobacco and nicotine, chlorine content, and a positive correlation with the total sugar content. Total nitrogen content in different areas existed differences with starch content. When starch content was above 3.8%, it had no correlation with total nitrogen contenting Yunnan, but had significantly negative correlation in Fujian and Sichuan tobacco-growing areas. There was no relativity when the reducing sugar content was below 3.8%, while there was positive correlation when the content was above 3.8%.4. Firstly, leaf tension declined slightly and then increased quickly, and tended to be stable at finally with the starch content going up; Leaf density tended to increase with an increasing in starch content; Leaf thickness changed not obvious when the starch content lower than 6.3%, but was positively correlated when the starch content above 6.3%. Equilibrium moisture content had no significant change when the starch content lower than 2.8%, and declined with the starch content higher than 2.8%; Tobacco stem proportion tended to increase as a whole with the increasing higher starch content; Starch content of tobacco leaves had no obvious regularity with leaf length and width.5. Starch content had almost no effect on the aroma quantity and quality of sensory quality; When the starch content was low, aftertaste became poor as starch content increased, but other indicators were not affected; With the increase of starch content, offensive odor increased, irritancy to be strong, aftertaste to be poor, when the content of starch above 3.8%; Flammability became poor with the starch content increase only when it within the range of T3 content.6. With the starch content increase, nicotine content in smoke declined rapidly, then increased slightly; Moisture, tar, TPM content increased linearly with starch content, CO content in smoke increased, and then decreased with starch content increase; while cigarette puff number increased slightly with starch content increase.