基于FTIR技术的茶树优良单株品质评价研究  

Study on Quality Evaluation of Superior Individual Tea Plant Based on FTIR Technology

作　　者：苏敏[1] 韦柳花[1] 孔德鑫[2] 罗小梅[1] 邱勇娟[1] 邓慧群[1] SU Min WEI Liu-hua KONG De-xin LUO Xiao-mei QIU Yong-juan DENG Hui-qun(Guangxi Guilin Tea Research Institute, Guangxi Guilin 541004, China Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and The Chinese Academy of Sciences, Guangxi Guilia 541006, China)

机构地区：[1]广西桂林茶叶科学研究所,广西桂林541004 [2]广西壮族自治区中国科学院广西植物研究所,广西桂林541006

出　　处：《西南农业学报》2017年第3期524-529,共6页Southwest China Journal of Agricultural Sciences

基　　金：广西农业重点科技计划项目(201516);广西科学研究与技术开发计划项目(14121008-1-7);广西壮族自治区基本科研业务费专项(GCJB-16-2)

摘　　要：为探索快速、客观的茶树优良单株品质评价方法,运用FTIR技术,结合感官审评和理化分析方法,比较分析了各单株质量。结果显示:(1)各样品的红外光谱整体上十分相似,由于各样品化学成分组成比例各异,因而有各自的特征红外光谱;(2)经红外光谱主要吸收峰相关系数分析得出,福鼎大白茶与5号单株的相关性最高,其次是2与4号单株相关性系数最低;(3)对氨基酸贡献率大的吸收峰主要分布在1648,1525和1454 cm^(-1)附近,这些吸收峰强度以CK样品最强,其次是5号单株,4号单株最低;对茶多酚贡献率较大的吸收峰主要在1236.2、1147.5和1037.5 cm^(-1)等处附近,这些吸收峰强度以4号单株最强,最弱的是CK。以上红外光谱数据分析结果与感官审评和理化分析结果相符。因此,傅里叶红外光谱法可以快速分析评价茶树单株品质的差异。To explore a fast and objective quality evaluation method for a superior individual tea plant, FTIR technique was applied to com- pare and analyze the average individual mass of different varieties in combination with sensory evaluation and physical and chemical analysis. Results showed that： （i） All samples shared similar infrared spectra basically, but their characteristic infrared spectra are different for vari- ous ratios of chemical components; （ii） Correlation analysis of main absorption peaks in infrared spectra indicated that Fuding Dabaicha was significantly correlated to No. 5 individual, No. 2 individual followed and had a lowest correlation coefficient with No. 4 individual; （iii） Ab- sorption peaks, which made great contribution to the formation of amino acid, were mainly at 1648, 1525 and 1454 cm -l, and CK sample had a strongest absorption peak strength, No. 5 individual followed and No. 4 individual owned a weakest absorption peak strength; absorp- tion peaks, which made higher contribution to the formation of tea polyphenol, were principally at 1236.2, 1147.5 and 1037.5 cm - 1, etc, and No. 4 individual had a strongest absorption peak strength and CK sample possessed a weakest strength. The abovementioned analytic out- comes of infrared spectra data are consistent with that of sensory evaluation and physical and chemical analysis. Therefore, FTIR technique cart be to analyze and evaJuatethe difference of the quality of individual tea plant.

关 键 词：傅里叶变换红外光谱 茶树优良单株 鉴定 

分 类 号：S572[农业科学—烟草工业]