Effects of Long-Term Nitrogen Fertilization on the Formation of Metabolites Related to Tea Quality in Subtropical China
文献类型： 外文期刊
作者： Chen, Yuzhen 1 ; Wang, Feng 1 ; Wu, Zhidan 1 ; Jiang, Fuying 1 ; Yu, Wenquan 3 ; Yang, Jie 4 ; Chen, Jiaming 4 ; Jian, Gu 1 ;
作者机构： 1.Fujian Acad Agr Sci, Tea Res Inst, 104 Pudang Rd, Fuzhou 350012, Peoples R China
2.Natl Agr Expt Stn Soil Qual, 1 Hutouyang Rd, Shekou Town 355015, Fuan, Peoples R China
3.Fujian Acad Agr Sci, 247 Wusi Rd, Fuzhou 350013, Peoples R China
4.Chinese Acad Sci, Key Lab South China Agr Plant Mol Anal & Genet Im, South China Bot Garden, 723 Xingke Rd, Guangzhou 510650, Peoples R China
5.Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, 723 Xingke Rd, Guangzhou 510650, Peoples R China
关键词： long-term nitrogen fertilization; Camellia sinensis; tea quality; chlorophyll; catechin; L-theanine; aroma compound
期刊名称：METABOLITES （ 影响因子：4.097； ）
ISSN：
年卷期： 2021 年 11 卷 3 期
页码：
收录情况： SCI
摘要： As a main agronomic intervention in tea cultivation, nitrogen (N) application is useful to improve tea yield and quality. However, the effects of N application on the formation of tea quality-related metabolites have not been fully studied, especially in long-term field trials. In this study, a 10-year field experiment was conducted to investigate the effect of long-term N application treatments on tea quality-related metabolites, their precursors, and related gene expression. Long-term N application up-regulated the expression of key genes for chlorophyll synthesis and promoted its synthesis, thus increasing tea yield. It also significantly increased the contents of total free amino acids, especially L-theanine, in fresh tea leaves, while decreasing the catechin content, which is conducive to enhancing tea liquor freshness. However, long-term N application significantly reduced the contents of benzyl alcohol and 2-phenylethanol in fresh tea leaves, and also reduced (E)-nerolidol and indole in withered leaves, which were not conducive to the formation of floral and fruity aroma compounds. In general, an appropriate amount of N fertilizer (225 kg/hm(2)) balanced tea yield and quality. These results not only provide essential information on how N application affects tea quality, but also provide detailed experimental data for field fertilization.
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