Abstract: 【Objective】Technological support was offered for perfecting the system of flue-cured tobacco quality evaluation and establishing regional assignment of tobacco planting by constructing the evaluating quantitatively system of appearance quality of flue-cured tobacco and being verified preliminarily. 【Method】The evaluating quantitatively system of appearance quality of flue-cured tobacco was constructed by adopting expert consultation, factor analysis, cluster analysis, fuzzy mathematics, statistical description, analysis of variance, analysis of correlation, geo-statistical analysis et al with flue-cured tobacco samples from tobacco-growing areas of Hunan in 2005, the correlation of evaluating indexes of appearance quality and region characteristic of appearance quality of flue-cured tobacco in Hunan were analyzed by that.【Result】There are extreme significance positive correlation between evaluating indexes of appearance quality. Evaluating indexes of appearance quality was clustered to 3 types: chroma, chromatic homogeneity, oil; mature, growth status, leaf structure, body; smooth or green-yellow. The sequence of the appearance quality score: X2F＜B2F＜C3F, and the score difference was extreme significance in different grades. There was not statistical difference of appearance quality score in different varieties. The sequence of the appearance quality score: Xiangnan＜Xiangzhong＜Xiangxibei, and the score difference was extreme significance in different ecological regions. The appearance quality index in spatial distribution reduced gradually from the high score area in west Hunan to the low score area in east Hunan, and the spatial difference of appearance quality index was distinctness. The styles of appearance quality of flue-cured tobacco in Hunan concentrate mainly on number three and number two, and less on number one. The difference of styles of appearance quality was distinctness in different grades and ecological regions.【Conclusion】The rationality of evaluating quantitatively system of appearance quality of flue-cured tobacco constructed by adopting expert consultation, factor analysis, fuzzy mathematics was verified, and that was doable to evaluate synthetically the region characteristic of appearance quality of flue-cured tobacco.

Key words: Flue-cured tobacco, Appearance quality, Evaluating quantitatively system, Index of appearance quality, Spatial distribution