Abstract:
In the research,two typical flue-cured tobacco varieties Yunyan 85 and K326 were selected as the research samples in view of they are widely planted in the whole province.The research material was based on the output and quality data of the flue-cured tobacco collected in Chuxiong City in the years of 1990~1998,and the ozone total quantity data measured by Kunming Dobson Observation Station in the corresponding period.Concretely,the 4~8 month is the main growth time of the flue-cured tobacco,the monthly mean observation of UVB in the same term was selected to check up the correlativity between the ozone quantity variation and the flue-cured tobacco planting.Having analyzed the correlations between the monthly UVB change and the flue-cured tobacco per hectare yield,the first-class tobacco proportion,as well as the tobacco chemical constituents respectively,It argued that there exists an evident negative correlation between the quantity variation of the atmospheric ozone and the flue-cured tobacco output,the first-class tobacco proportion.Furthermore,the atmospheric ozone variation seemed to potentially affect the growth and the chemical composition accumulation of the flue-cured tobacco.Regardless of other natural conditions,the analysis suggests that the flue-cured tobacco growth and its chemical constituents shows a response to the quantity variation of the atmospheric ozone.Whereas flue-cured tobacco growth is a complex progress,further study on the influence of the combination of the natural factors is still required.