干旱对苦丁茶品质的影响  

Effect of Drought on Quality of Kuding Tea

作　　者：李自玉[1] 王德炉[1] 闫小莉[1] 丁波 

机构地区：[1]贵州大学林学院 [2]贵州省林业科技推广总站

出　　处：《贵州农业科学》2011年第2期63-66,共4页Guizhou Agricultural Sciences

基　　金：贵州省自然科学基金项目"土壤环境对粗壮女贞茶叶品质影响规律"[黔科合J(2007)2059];贵州省农业科技攻关项目"提高粗壮女贞品质和产量的关键技术研究"[黔科合NY字(2007)3040];贵州省教育优秀人才省长资金项目"贵州苦丁茶(粗壮女贞)丰产栽培技术研究"[黔省专合字(2006)5]

摘　　要：为苦丁茶的优质栽培提供理论参考,采用自然干旱方式,研究了干旱对苦丁茶品质指标的影响。结果表明:干旱对各品质指标有显著影响,随干旱时间的延长,茶多酚、黄酮、茶皂素含量变化一致,均呈先升后降趋势;可溶性糖含量呈递增趋势;游离氨基酸、水浸出物含量呈递减趋势。综合考虑品质指标与品质关系,适度干旱有利于品质的形成,并以持续干旱10 d效果较好,过度干旱则化学成分含量总体降低,进而影响品质。Effect of natural dry stress on quality indicators of Kuding tea were studied to provide theoretical reference for high quality cultivation of Kuding tea.The results showed that drought had significant effect on quality indicators.The contents of tea polyphenol,flavone and tea saponin first increased and then declined with drought time prolonging.The content of soluble sugar increased continually while free amino acid and water extraction decreased continually.The relationships between quality indicators and quality indicated that the formation of quality was due to moderate drought,10 days of continuous drought had the best effect,the content of overall chemical composition reduced due to excessive drought,thereby the quality of Kuding tea was affected.

关 键 词：持续干旱 苦丁茶 粗壮女贞 品质 

分 类 号：S571.1[农业科学—茶叶生产加工]