西南烟区烤烟表面颜色特征量化分析

摘要

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 tobacco-planting counties was conducted using L * a* b * color space characterization method.The results showed that the brightness (L*) and yellowness (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 significant positive correlation between brightness (L*) with yellowness (b*) and color saturation (C*),while very significant negative correlation with reddishness (a*) 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.