Abstract: On basis of the existed climatic suitability division of the flue-cured tobacco planting,the division of the tobacco-leaf quality was made,by using GIS techniques,hierarchical clustering and grey correlative analysis. The results showed that four different chemical quality types of tobacco leaf were produced under the climate conditions in Yunnan,especially favorable to the mid-high sugar and low nitrogen or nicotine mid-low petroleum ether extract (typeⅠ),and high sugar and low nitrogen or nicotine thin petroleum ether extract (type II). The moist suitable and suitable regions for type I were in the middle Yunnan,while the less suitable and suitable regions were in the southwest Yunnan. The results for division of the suitable regions and of the tobacco leaf quality were consistent in some extents and complementary to each other.

Key words: Flue-cured tobacco, Flue-cured tobacco, Chemical quality, Climatic division, GIS, Grey correlative analysis