Effects of Climate and Soil on Leaf Aroma Precursors and Style of Flue-cured Tobacco

For the sake of exploring the effects of climate and soil on leaf aroma precursors and style of flue-cured tobacco,By changing soils from different places,with the same variety and cultural practices,Leaf trichome density,trichome exudates,alkanes,β-crotene and lutein,leaf aroma style and precursors contents of tobacco leaves which were grown under the same and different climate conditions were studied.The results showed that leaf trichome density was mainly determined by genotypes of the variety and influenced less by climatic condition;Climatic factors had greater effect on the contents of leaf aroma precursors,such as trichome exudates,alkanes,β-crotene and lutein,than soil factors did,2/3 versus 1/3;Leaf aroma style was mainly affected by climate,soil effect was not considerable;Light intensity during leaf maturing period had most significant effect on leaf aroma style and precursors contents.