Non-volatile Organic Acid Contents in Flue-cured Tobacco Leaves at Different Stalk Positions during Maturing

In order to explore the changes of organic acid and senior fatty acid in each stalk positions of different varieties of flue-cured tobacco during maturing, we used four tobacco varieties as experimental materials to determine their leaf organic acid contents, including Hongda, Yunyan 87, K326 and Zhongyan 100. The results showed that the non-volatile organic acid content of Zhongyan100 was low and those of Hongda, Yunyan87 and K326 were high. The non-volatile organic acid content of bottom leaves was higher than those of top and middle leaves. As tobacco mature, the multiple organic acid contents decreased gradually, the content of senior fatty acid decreased first, then increased, and finally decreased in middle and top leaves, and decreased gradually in low leaves.