Abstract:
In order to screen out new line of good quality flue-cured tobacco and enrich the flue-cured tobacco varieties resources, field experiments were conducted in six different provinces with five newly introduced varieties from American with good disease resistance and two main varieties, K326 and Yunyan87. To understand the characteristics of chemical composition content of each varieties, five conventional chemical compositions, such as total sugar, reducing sugar, nicotine, total nitrogen and potassium were detected. The results were statistical analysis in accordance with the requirement of Hongta Tobacco (Group) Co.. The results showed that potassium and total sugar content level in tobacco leaf were basically in the appropriate range required by Hongta Tobacco (Group) Co.. The ratio of non- nicotine N to total N of NC-YATAS15 was consistent with the requirements of Hongta Tobacco (Group) Co.. The nicotine of NC-YATAS9 is stable and suitable. The consistency of total sugar and reducing sugar in all tested varieties of all varieties was poor. In comparison, AOV405 was a variety with high sugar, high potassium and low nicotine content. There was no significant difference in the content of nicotine, total sugar and reducing sugar between the five new varieties and the control K326 and Yunyan87. There was a certain difference in total nitrogen, total nitrogen, Yunyan87 was significantly higher than that of AOV405. The potassium content of 5 newly introduced varieties was higher than that of the control K326 and Yunyan87, and the potassium content of CC35 varieties was significantly higher than that of other varieties. There were significant differences in the chemical composition of tobacco leaves planted in different provinces. The nicotine and potassium of tobacco leaf in Guiyang were higher and the total sugar was lower. The content of nicotine, nitrogen and potassium were higher and the content of total sugar and reducing sugar was lower in Yongzhou. The reducing sugar of tobacco leaf was lower in Wulong County of Chongqing. The tobacco leaf of Longyan in Fujian had higher total sugar,reducing sugar, lower nicotine and total nitrogen. The nicotine, potassium and total nitrogen were lower, the total sugar and reducing sugar were higher in tobacco leaves of Cangling Chuxiong, in Yunnan Province.