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本研究于2003年春季在中国农业科学院茶叶科学研究所茶园中比较不同的快速氮素营养诊断方法在绿茶研究中的应用。该研究建立在6个不同施纯N水平(0,150,300,600,900,1600 kg/(hm2.a)、4个重复的完全随机区组设计的试验基础之上。不同部位叶片中SPAD值与叶绿素含量呈极显著的正相关,但与施氮量之间的相关性很差。基于标准添加技术的NO3-回收率表明:尽管硝酸电极对水溶液中NO3-的回收率高达97.2%,但回收稳定性很差;相反,虽然硝酸盐反射仪对水溶液中NO3-的回收率只有68%,但相当稳定。因此,SPAD、硝酸盐电极和硝酸盐反射仪三者比较的结果表明:硝酸盐反射仪是绿茶氮营养快速诊断研究中最适宜的方法。
In the spring of 2003, this study compared the different rapid nitrogen nutrition diagnosis methods used in tea research at Tea Research Institute of Chinese Academy of Agricultural Sciences. The study was based on a trial of 6 randomized N-levels (0,150,300,600,900,1600 kg / (hm2.a), four replicates of a completely randomized block design. SPAD and chlorophyll content were significantly different in different parts of the leaves , But poor correlation with nitrogen application rate.The recovery of NO3-based technology based on standard addition technology shows that although the recovery of NO3- in nitric acid electrode is as high as 97.2%, the recovery stability is poor. On the contrary, although the nitrate reflectometer has only 68% recovery of NO3- in aqueous solution, it is quite stable, so the comparison of SPAD, nitrate electrode and nitrate reflectometer shows that nitrate reflectometer is green tea nitrogen nutrition The most suitable method for rapid diagnostic studies.