Abstract: To reveal the mechanism of Lijiang tobacco quality,the ecological condition and chemical components of flue-cured tobacco in Lijiang were analyzed based on local data of climate,soil,ecology,and tobacco.The results showed that the climate of tobacco-growing areas in Lijiang was quite different during tobacco growing season.There were long sunshine hours,feasible temperature,low humidity and precipitation during root extending stage,as short sunshine hours but more scattering light,low temperature,high humidity and precipitation during maturing stage.The soil condition had strong capability of storing nutrients and feasible pH value,the content of organic matter was rich,the content of available N,P,K,Mg,Zn and water soluble Cl were medium or high,the content of available Ca and available Mo were quite high,the content of available B was low.The content of total sugar and reducing sugar in tobacco leaves were high,nicotine content was feasible,but K and Cl content were lower than other regions,the ratio of reducing sugar to total sugar was low,the ratio of sugar to nicotine was high,the ratio of K to Cl was obviously higher than other regions.In brief,the combination and distribution of the radiation,temperature and precipitation during the growing season were ecological reason to high quality tobacco in Lijiang.

Key words: Flue-cured tobacco, Flue-cured tobacco, Meteorology, Soil, Chemical components