不同烟区烤烟化学成分的主导气候影响因子分析

根据纬度差异和地理方位，将我国主产烟区的7省12县分为南北两大烟区，采用统一栽培模式，对两区烤烟( Nicotiana tabacum L. )主要化学成分和大田生长期不同时段的气候因素进行多元相关及逐步回归分析，初步获得了两烟区烤烟化学成分的主导气候影响因子。主要结果是:北方烟叶化学成分与气候因素的相关程度比较明显，南方烟区相对来说不很显著，影响北方烟叶化学成分的气候因子多于南方烟叶。南北两烟区不同生育时段的气象因子与烤烟化学成分有不同的关联度，影响烟叶化学成分的主导气候因子明显不同，作用方向也各不相同。综合而言，北方烟区化学成分的主导气候影响因子是相对湿度、气温日较差和10 cm地温；南方烟区化学成分的主导气候影响因子是日照时数和降雨量。

Analysis of the dominant climatic factors influencing the chemical compositions of flue-cured tobacco in different tobacco-growing areas

In this study, 12 counties in 7 provinces of Chinese main tobacco production areas were divided into south and north tobacco growing zones according to geographic orientation and latitude differences. Correlation and stepwise multiple regression between main chemical compositions of tobacco leaves and climate factors in different stages during the growing season in different tobacco-growing areas were performed under the same cultivation conditions. The results showed that there were significant correlation between chemical compositions of tobacco leaves and climatic factors in the north, but not in the south. There were more climatic factors affecting chemical compositions of tobacco leaves in the north than in the south. The relationships between tobacco chemical constitutions and different weather factors differed at different stages in the south and north tobacco growing areas. The dominant climate factors also varied. In general, the dominant climatic factors influencing the chemical compositions of tobacco leaves were relative humidity, diurnal temperature range and 10cm soil temperature in the north tobacco growing area, but were sun shine duration and rainfall in the south tobacco growing areas.