焙火温度对条形乌龙茶品质的影响
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安徽省重点科研计划项目(07020303037)和农业部现代农业产业体系(农科教发[2008]10)共同资助。


Effects of baking temperature on quality of oolong tea
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    摘要:

    为了研究条形乌龙茶加工过程中焙火工艺的最适宜温度,试验以足火后茶样为材料,设定高温(140℃)、中温(130℃)和低温(120℃)3个不同的温度进行焙火。结果表明,随着焙火温度的升高,各处理样的茶多酚、氨基酸等主要化学成分含量呈现不同程度的减少趋势,咖啡碱和多糖的含量减少不显著。中温焙火处理茶样的香气指数比低温处理和高温处理分别高6.09%和43.48%。感官审评结果亦表明,中温焙火处理的条形乌龙茶香气高长,品质最优。

    Abstract:

    In order to investigate the optimum baking temperature for strip shaped oolong tea processing, final firing tea was used to bake at 140℃, 130℃ and 120℃, respectively. The result showed that the contents of the major biochemical components of oolong tea, such as tea-polyphenols and amino acid decreased with the increase of baking temperature, but the contents of caffeine and soluble sugar revealed no significant reduction. The FI (fragrance index) under medium temperature treatment(130℃)was higher than that under low and high temperature treatment of 6.09% and 43.48%, respectively. The results of sensory evaluation also showed that the aroma of strip shaped oolong tea baked at 130℃ was stronger and could last longer. The quality of oolong tea baked with medium-temperature is the best.

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  • 收稿日期:2011-11-16
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  • 在线发布日期: 2016-12-05