重庆植烟区气候因子对烤烟化学成分的影响

根据气候统计数据，进行聚类分析，将重庆市12个植烟区分为4个不同区域类型：石柱、南川、彭水和武隆为第1类，丰都、涪陵、万州和巫山为第2类，奉节和巫溪归为第3类，酉阳和黔江为第4类。4类区域各气候因子及烟叶化学成分含量之间都具有显著性差异。大田期均温均能满足烟叶生长的需求，影响第1、4类烟区化学成分含量的主导气候因子是大田期总日照，大田期总日照和降雨量为影响第2、3类的主要气候因子。

Effects of Climate Factors on Chemical Compositions of Flue-cured Tobacco in Chongqing

Based on the statistical climate data analyzed by clustering method, twelve tobacco planting areas in Chongqing were divided into four regions. The first region covered Shizhu, Nanchuan, Pengshui and Wulong County. The second region was made up of Fengdu, Fuling, Wanzhou and Wushan County. The area distribution of third region included Fengjie and Wuxi County. And Youyang, Qianjiang County belonged to the fourth region. There were significant differences in both climate factors and chemical compositions of tobacco among those four regions. In all these four regions, temperature conditions could meet the need of tobacco during its growth period and the total sunshine hours had significant influence on tobacco chemical compositions in region Ⅰ and Ⅳ. The precipitations in region Ⅱ and Ⅲ affect tobacco chemical compositions significantly and made them distinguishable from other two regions.