关键词: 烤烟；气象因子；化学成分；相关性；保山

Abstract:

Taking the descriptive statistics, simple correlation and canonical correlation analysis as methods, this paper studied the relationship between major climatic factors and chemical compositions of flue\|cured tobacco in Baoshan. The result indicated that ① climate in Baoshan was suitable for planting high\|quality flue\|cured tobacco. ② the influences of climatic factors on tobacco leaf chemical composition were  in the following order: temperature>precipitation>sunshine; protein contents, ratio of potassium to chlorine, reducing sugar and total N were obviously affected by meteorological parameter, and the weather in July had the greatest impact on chemical compositions. ③ tobacco leaf protein contents showed a significant negative correlation with sunshine hours in September, mean precipitation in July and August, and mean temperature in May, June and July; Reducing sugar was significantly negative correlated with mean precipitation in May, mean monthly temperature, while significant positive correlation with mean precipitation in July. The total N showed a significant negative relationship with mean temperature in May, sunshine hours in September and mean precipitation in July and August. The correlation of potassium ratio to chlorine was significantly positive with mean temperature in August and September, and significantly negative with sunshine hours in July. The influences of temperature and precipitation on tobacco leaf chemical compositions were: reducing sugar > total N > protein, and total N >reducing sugar >protein, respectively.

Key words: flue\, cured tobacco, climatic factors, chemical composition, correlation analysis, Baoshan