西南烟区烤烟表面颜色特征量化分析

Quantitative Analysis on Surface Color Characteristics of Flue-Cured Tobacco in Southwest Tobacco-Growing Area

为探析西南烟区不同部位烤烟表面颜色特征,采用L*a*b*颜色空间表征方法对西南烟区20个植烟县不同部位的烤烟表面颜色进行量化分析。结果表明:(1)西南烟区烤烟下部叶的明度(L*)和黄度(b*)最高,红度(a*)以上部叶最高,中部叶表面颜色特征参数变异程度最大;(2)随烟叶部位上升,西南烟区烤烟表面颜色明度(L*)和黄度(b*)逐渐降低,而红度(a*)逐渐升高;(3)西南烟区烤烟表面颜色的明度(L*)与黄度(b*)、颜色饱和度(C*)存在显著或极显著正相关,与红度(a*)存在极显著负相关。

In order to analyze the surface color characteristics in different parts of flue - cured tobacco in southwest tobacco - growing area, the quantitative analysis on surface color of flue - cured tobacco in 20 tobac- co -planting counties was conducted using L ＊ a ＊ b ＊ color space characterization method. The results showed that the brightness （ L＊ ） and yeflowness （ b＊ ） of the lower leaves were the highest, and the reddishness （ a ＊ ） of the upper leaves was the highest. The central leaves had the largest variation on tobacco surface color feature parameters. Along with the rise of leaf position, the brightness （ L＊ ） and yellowness （ b ＊ ） of flue - cured tobacco decreased gradually, while the reddishness （a ＊ ） increased. There were significant or very sig- nificant positive correlation between brightness （L＊） with yellowness （b＊） and color saturation （C ＊ very significant negative correlation with reddishness （a＊） in southwest tobacco -growing area. ）, while