Effect of Meteorological Factors on Quality of Tobacco Upper-leaves in Typical Tobacco-growing Areas in Guizhou Province

Changes of main intrinsic chemical composition such as nicotine,total sugars as and their coordinate difference test between different oil state tobacco upper-leaves in typical flue-cured tobaccogrowing areas were studied in Guizhou.Cultivar Yun85,K326and Nanjiang 3were tested in Northern Guizhou(Zheng'an,Meitan,and Yuqing County)and Southern Guizhou(Duyun,Weng′an,and Fuquan County).Results showed as follows:the average temperature in Northern Guizhou tobacco-growing area was higher than Southern Guizhou by 2~3℃during the development stage of flue-cured tobacco.Content of nicotine,total sugar,and reducing sugar was higher in high-oil tobacco upper-leaves in Northern Guizhou,but total N,Cl,and protein content were lower,also,the Shmuck value and K/Cl were higher,and N/nicotine were lower in Northern Guizhou.By contrast,there were no obvious trends of intrinsic chemical composition content and coordination in low-oil tobacco upper-leaves in all the tobacco-growing areas.