采用人工气候箱设置不同萎凋湿度条件,研究萎凋过程中鲜叶的色差动态变化,并分析其内在规律。结果表明,3种湿度萎凋条件下茶叶的3个色度指标L、a、b随着萎凋时间的增加均存在显著变化,并且不同湿度间存在显著差异,但其差异随着萎凋时间的增加逐渐减小。本研究分析了3种湿度条件茶叶萎凋过程中的色差L、a、b及总体色差的变化规律,并且根据其表现说明RH70%可作为适宜的茶叶萎凋调控湿度。本研究结果可为完善茶叶加工过程中理化性质变化的理论基础提供参考。
Different withering humidity conditions are set with artificial climate box, the dynamic change of chromatic aberration during withering leaves and its inherent law were investigated. The results showed that, three chroma index L, a, b showed significant changes with the increase of withering time under the conditions of three different humidity treatments, and there were significant differences between different humidity treatments, but its difference was decreased gradually with the increase of the withering time. The law of change of L, a. b and overall color during tea withering process with the conditions of three different humidities were analysed in this investigation. The results showed that 70% humidity was regarded as the optimum humidity in the withering of tea. The results of this investigation provided the reference to the theoretical basis on the changes of physic-chemical properties in tea process.
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