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茶叶科学 ›› 2011, Vol. 31 ›› Issue (4): 305-312.doi: 10.13305/j.cnki.jts.2011.04.004

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乌龙茶品质评定与产品判别研究

孙威江1, 董青华1,2, 周卫龙3, 董秀云4   

  1. 1. 福建农林大学园艺学院,福建 福州 350002;
    2. 福州市华茗茶业研究所, 福建 福州 350001;
    3. 国家茶叶质量监督检验中心, 浙江 杭州310016;
    4. 福建省质量技术监督局, 福建 福州 350001
  • 收稿日期:2010-10-08 修回日期:2011-04-18 出版日期:2011-08-15 发布日期:2019-09-09
  • 作者简介:孙威江(1964— ),男,福建福鼎人,教授,博士,主要从事茶叶食品安全与品质调控研究。swj8103@126.com
  • 基金资助:
    福建省质量技术监督局标准化项目(2011708-认证认可监督管理),科技部星火科技项目(2010GA720012)

Study on the Quality Evaluation and Product Discriminate of Oolong Tea

SUN Wei-jiang1, DONG Qing-hua1,2, ZHOU Wei-long3, DONG Xiu-yun4   

  1. 1. College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
    2. Fuzhou Huaming Tea Research Institute, Fuzhou 350001, China;
    3. National Tea Quality Supervision and Inspection Center, Hangzhou 310016, China;
    4. Fujian Provincial Bureau of Quality and Technical Supervision, Fuzhou 350001, China
  • Received:2010-10-08 Revised:2011-04-18 Online:2011-08-15 Published:2019-09-09

摘要: 采用闽南、闽北和广东乌龙茶为样本,进行了基于化学成分、因子分析和判别分析的茶样品质评定和产品判别模型研究。应用因子分析得出累积变异量为85.041%的7个公共因子,再以公共因子为自变量,采用同步判别分析法对茶样进行产地、品种和级别鉴别,建立判别函数;交叉验证和回代样本验证结果显示,产地和品种的判别模型正确区别度较高,产地的回代和交叉验证总正判率分别为97.6%和94.0%,品种的为86.9%和75.0%。并确立7个乌龙茶品质因子得分函数和1个综合评价函数,得到判别效果良好的产地判别函数3条、品种判别函数6条。

关键词: 乌龙茶, 品质评定, 产品判别, 因子分析, 判别分析

Abstract: The model of quality evaluation and products discrimination of Oolong tea based on chemical composition, factor and discriminant analysis were studied with Guangdong, southern and northern Fujian Oolong tea as the samples. Seven factors with cumulative variance of 85.041% were obtained along with factor analysis, set the factors as the independent variable, and discriminating classification of the samples area,variety and grade use discriminant analysis. Then the discrimination functions were established. Results of cross-validation and resubstitution of testing samples demonstrated the correct rates of discrimination model of area and variety was satisfactory. Recognition accuracy of the resubstitution and cross-validation of area were 97.6% and 94.0%, which of variety was 86.9% and 75.0%. Seven score function of quality factor and one comprehensive evaluation function were established for Oolong tea, and three discrimination functions for producing area and six of variety were obtained and the discrimination results were satisfactory.

Key words: Oolong tea, quality evaluation, product discriminate, factor analysis, discriminant analysis

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