摘要
为探究烟叶表面颜色呈色特性,以三明烟区主栽品种CB-1和云烟87为试验材料,采用田间挂牌标记试验方法,测定两个品种每个叶位烤后烟颜色值L*、a*、b*、C*和颜色特性,分析了不同叶位烟叶颜色值、外观颜色档次和均匀度变化。结果表明,不同品种不同叶位烟叶颜色值有相似的变化趋势;不同叶位烟叶颜色值聚类结果与不同部位烟叶颜色变化相吻合;随着叶位上升,明度的均匀度由均匀或尚匀转变为不匀,红度的均匀度变化与此相反,黄度的均匀度先由尚匀转变为均匀再转变为尚匀,视觉判定的均匀度为先上升后降低的趋势,与黄度的均匀度变化较为一致;建立了烟叶颜色值与叶位上升关系方程,L*线性递减,a*线性递增,b*和C*呈抛物线型变化,在7~10叶位达到最高值。这为烟叶外观颜色变化提供了一种客观量化判定方法。
The experiments were conducted to discover color characteristics of flue-cured tobacco through analyzing changes of L*,a*,b*,C*and features in each leaf-position.The tobacco cultivars CB-1and Yunyan87ware used in these experiments.Color value,level of appearance color and variation of uniformity were evaluated.The results showed that the trends of changes in color value weresimilar between different nodes.The clustering results of color value in different nodes agreed with color variation in different stalkportions.With the rising of nodes,the uniformity of brightness decreased and redness increased.The patterns of the uniformity changeof yellowness and sensory evaluation at different nodes showed some similarities with the color uniformity of cutters being the highest.A corelation equation between color value of tobacco leaves and the rise in nodes was establelished.The L*value linearly decreasedand the a*value linearly increased.The changes of the b*value was a parabola which reached the highest value at the7th to the10thnodes.The change of the C*value was similar to the b*value.The traditional theory of tobacco grading could be complemented byevaluating color characteristics through L*a*b*color space and sensory evaluation techniques.An objective and quantitative methodwas provided for appearance color variation of tobacco leaves.
作者
李悦
符云鹏
甄焕菊
魏春阳
王改丽
唐浩
LI Yue;FU Yunpeng;ZHEN Huanju;WEI Chunyang;WANG Gaili;TANG Hao(College of Tobacco Science, Henan Agricultural University, Key Laboratory of Tobacco Cultivation in the Tobacco Industry, Zhengzhou 450002, China;Worker Institute of Further Education, China National Tobacco Corporation,Zhengzhou 450008, China;China National Leaf Tobacco Company, Beijing 100055, China)
出处
《中国烟草科学》
CSCD
北大核心
2017年第1期78-84,共7页
Chinese Tobacco Science
基金
中国烟草总公司特色优质烟叶开发重大专项“浓香型特色优质烟叶开发”(Ts-01-2011005)
关键词
烤烟
颜色
L*
a*
b*
flue-cured tobacco
color
L*
a*
b*
