Analysis on the differences of principal chemical components and smoke components of flue-cured tobacco in main tobacco-growing areas of Yunnan

571 Flue-cured tobacco leaves samples were collected from four tobacco-growing areas of Yunnan.Three chemical components in tobacco leaves and five chemical components in the gas of these samples were analyzed by using distribution fitting.According to the different conclusions by distribution fitting,used normal distribution method or non-normal distribution method to find the indexs which expressed the significant differences of tobacco leaves among different tobacco-growing areas l at 5% .The results indicated that:Total particulate matter,tar oil and ethanol extract were normal distributions,the other indexes had different distributions.The principal chemical components of flue-cured tobacco leaves in different tobacco-growing areas had significant differences.