Evaluation and Analysis of Ecological Climatic Index of Tobacco-growing Areas in Chuxiong

Based on climatic data and main climatic factors influencing the content of flue-cured tobacco, the climatic feasibility indexes (CFI) were estimated for tobacco-growing areas in Chuxiong. Standard deviation calculation was applied to obtain weight of climatic factors. Analyses were conducted on similarity between climatic conditions of three different representative counties in Chuxiong and corresponding climatic conditions in high-quality tobacco-growing areas at home and abroad. Combined with the experienced formula, the flavors of tobacco leaves in Chuxiong were positioned. The results were as follows:In tobacco-growing areas of Chuxiong, mean temperature of 19.8 degrees during maturing period was relatively moderate. The rainfall distribution was relatively appropriate. Sunshine hours during field period were over 500 h, indicating that sunshine condition was fine. CFIs for flue-cured tobacco ranged from 0.61 to 1.00, indicating that Chuxiong tobacco-growing areas were suitable to tobacco growth. The similarity of the climatic conditions of flue-cured tobacco suggested in three representative tobacco-growing counties, Chuxiong and Yaoan with corresponding climatic conditions in Brazil was higher than that with climatic conditions in America and Zimbabwe, and Chuxiong and Yaoan with corresponding climatic conditions in Xuchang was lower than that with climatic conditions in Zunyi and Sanming, China. Compared with Chuxiong and Yaoan, climate similarity between Yuanmou and other tobacco-growing areas showed the opposite trend. Chuxiong tobacco aroma positioning K values of tobacco leaf in Chuxiong averaged 0.27 showed that tobacco leaf was typical of scent type.