不同种植海拔高度对曲靖地区烤烟主要化学成分的影响

Effects of different plant altitude on chemical composition of flue-cured tobacco in Qujing districts

对曲靖地区烟叶化学成分分析及与海拔高度相关分析的结果表明，在相同的栽培条件下，海拔高度是影响烟叶化学成分的重要综合性生态因子，相关性分析结果显示：①海拔高度与总耱，还原耱含量呈正相关，达到显著水平（P〈0.05），②烟碱和总N含量随海拔升高而降低，与海拔高度呈负相关。③在海拔1400—1600m种植的烟叶，主要化学成分协调，烟叶可用性高。

The relative analysis on altitude and main chemical composition of Qujing fule-cured tobacco leaves was carded out. The results showed that the altitude was an important factor,whlch influenced tobacco chemical compositions ,under the same cultivation condition. There had some conclusions that ：（i）the correlations of total sugar and reducing sugar with the altitude were positive（ P 〈 0.05 ） ;（ii）the nicotine and total nitrogen were negatively correlated with the altitude（ P 〈 0.05 ） ;（iii）in 1400 - 1600 m it can produce good quality tobacco, the aroma concentration, harmony between major chemical components,hence, the usability of flue-cured tobacco would be better when the tobacco was planted at moderately higher altitude. This an＇icle researched the rolationship of different elevation and chemical compositions in flue-tubacoo through chemical experiments.