氮素水平对茶树重要农艺性状和化学成分含量的影响  

The Effects of Nitrogen Supply on Agronomic Traits and Chemical Components of Tea Plant

作　　者：李海琳[1] 王丽鸳[1] 成浩[1] 韦康[1] 阮丽[1] 吴立赟[1] LI Hailin;WANG Liyuan;CHENG Hao;WEI Kang;RUAN Li;WU Liyun(Tea Research Institute, Chinese Academy of Agricultural Sciences , National Center for Tea Improvement, Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Hangzhou 310008, China)

机构地区：[1]中国农业科学院茶叶研究所/国家茶树改良中心,农业部茶树生物学与资源利用重点实验室,浙江杭州310008

出　　处：《茶叶科学》2017年第4期383-391,共9页Journal of Tea Science

基　　金：国家自然科学基金项目(31570695);国家现代农业产业技术体系建设专项资金项目(CARS-23);浙江省农业新品种选育重大科技专项(2016C02053)

摘　　要：以龙井43为对照,分析了不同氮素水平对4个茶树品系重要农艺性状和化学成分含量的影响。结果表明:氮素供应充足时,各茶树品系叶绿素含量提高,茶芽萌发和新梢生长加快,发芽密度与着叶数增加,可以有效提高茶叶产量;氮素影响氨基酸、咖啡碱和多酚类物质在茶树体内的代谢,施用氮肥可以增加茶叶中茶氨酸、咖啡碱等的含量,提高茶叶品质。本研究还发现中茗22号和LY002对氮素响应比较明显,可为今后氮素高效型茶树品种选育提供依据。In this study,the effects of nitrogen supply on the important agronomic traits and chemical components were analyzed in4tea varieties using Longjing43as control.The results showed that sufficient nitrogen application effectively increased the tea yields by changing some key agronomic traits,such as increasing the chlorophyll content in mature leaves,accelerating the germination and growth of new shoots and increasing the density of germination.Meanwhile,nitrogen application affected the metabolisms of main chemical components(theanine,caffeine and polyphenols)in tea plant,resulting in the improvement of tea quality.The Zhongming22and LY002showed more sensitive responses to high nitrogen application.These results provide important backgrounds for breeding of tea cultivars with higher nitrogen use efficiency.

关 键 词：氮素水平 茶树 农艺性状 化学成分 

分 类 号：S571.1[农业科学—茶叶生产加工] S143[农业科学—作物学]