福建农业学报2025，Vol.40Issue(5)：500-509,10.DOI:10.19303/j.issn.1008-0384.2025.05.008
夏季遮光对苦茶不同叶位芽叶生长及主要化学成分的影响
Effects of shading in summer on the growth and main chemical components of bud and leaf at different positions of Camellia sinensis var.kucha
摘要
Abstract
[Objective]The effects of shading in summer on the growth of different leaf positions and the accumulation of leaf positions of kucha were studied,and the suitable shading intensity was selected for the cultivation of kucha varieties,so as to provide theoretical basis for the cultivation of kucha varieties and the improvement of tea quality.[Method]Setting up shading test,and the effects of different shading treatments on the growth of different leaf positions of kucha'Zimailongyun'and the accumulation of catechins and purine alkaloids were analyzed.[Result]Compared with the full light control group,using the shading rate of 65%and 85%could promote the early germination of kucha Zimailongyun.Each phenological stage of shading group were advanced,and the bud and leaves of kucha after the shading treatment were thicker,greener and better growth.The leaves of the single bud,the first leaf and the second leaf were the heaviest under shading rate of 85%.The content of catechin(C),epicatechin(EC),gallocatechin(GC)and gallocatechin gallate(GCG)in buds and leaves of kucha decreased with the increase of shading rate.From the first leaf to the fifth leaf,the contents of theacrine(TCR),purine alkaloids,and epigallocatechin gallate(EGCG)in leaves in shading group were higher than those in the control group,while the contents of caffeine(CAF)and non-ester catechin were opposite.The content of ester catechin in single bud and the first leaf decreased gradually with the increase of shading rate.From the second leaf to the fifth leaf,the content of ester catechin in shading group was higher than that in CK group.[Conclusion]Shading treatment of kucha'Zimailongyun'with shading rate of 65%and 85%not only beneficial to its growth and the accumulation of functional components EGCG and TCR in the leaves,but also reduces the content of CAF in leaves.Under the shading rate of 85%,higher yield of tender and fresh leaves of'Zimailongyun'could be obtained.Combined with actual production,it was recommended to use shading nets with shading rate of about 85%for shading cultivation of kucha variety in order to achieve the purpose of effectively improve the quality and yield of summer tea of kucha.关键词
苦茶/遮光/叶位/苦茶碱/夏季Key words
Camellia sinensis var.kucha/shading/leaf positions/theacrine/summer分类
农业科技引用本文复制引用
吴玲玲,陈远权,梁贤智,巫虹颖,翁小婷,王明释,黄静,阳景阳,陈杏,彭叶..夏季遮光对苦茶不同叶位芽叶生长及主要化学成分的影响[J].福建农业学报,2025,40(5):500-509,10.基金项目
广西重点研发计划项目(桂科AB23026086) （桂科AB23026086）
崇左市科技计划项目(2024ZC1103) （2024ZC1103）
广西自然科学基金项目(2024GXNSFBA010331) （2024GXNSFBA010331）
广西农业科学院基本科研业务专项(桂农科2023YM24、桂农科2021YT162、桂农科2021YT164) （桂农科2023YM24、桂农科2021YT162、桂农科2021YT164）
广西南亚热带农业科学研究所稳定资助科研团队项目(NYS2025ST06) （NYS2025ST06）
