茶叶科学2026，Vol.46Issue(4)：637-650,14.
不同遮阳网直接覆盖调控茶园冠层微环境及其对碾茶类黄酮组成的影响
Effects of Direct Covering with Different Shade Nets on The Tea Canopy Microenvironment and Flavonoid Composition of Tencha
摘要
Abstract
Direct covering is widely used in the production of matcha raw material,with the advantages of easy operation,low cost,and compatibility with mechanized management.However,how shade nets with different materials and colors differentially affect the canopy microenvironment and flavonoid biosynthesis in tea plants remains unclear.In the present study,eight shade nets varying in material and color were applied to the tea cultivar'Longjing 43'in the field to investigate their effects on the canopy microenvironment and flavonoid accumulation in tencha.The results show that direct covering primarily regulated the canopy microenvironment through changes in ultraviolet(UV)radiation,air humidity,and leaf temperature beneath the cover.Net shade percentage was the major determinant of UV intensity under the net.A black inner surface was more effective in reducing leaf temperature,whereas a white outer surface or aluminum-foil material decreased net surface temperature and heat accumulation,thereby lowering the risk of leaf scorching.All covering treatments generally reduced flavonoid accumulation in the processed tencha,with total catechins decreasing by 16.4％-33.6％and total flavonol glycosides by 23.8％-43.3％.Correlation analysis based on both absolute values and treatment-induced changes further demonstrates that reduced UV radiation was the major driver of the decline in flavonoids,particularly flavonol glycosides,whereas a moderate increase in leaf temperature promoted the accumulation of catechins and quercetin glycosides.Therefore,when producing matcha raw materials under direct covering,shade-net types that combine a high shading rate with good heat dissipation properties should be prioritized,in order to both reduce the UV intensity beneath the net and control leaf temperature.This study provided a theoretical basis for optimizing shading practices and designing novel shade nets for the targeted quality regulation of matcha raw materials.关键词
直接覆盖/冠层微环境/碾茶/儿茶素类/黄酮醇苷Key words
direct cover/canopy microenvironment/tencha/catechins/flavonol glycosides分类
农业科技引用本文复制引用
刘弈杰,陈佳滢,方奇挺,叶俭慧,金子晶..不同遮阳网直接覆盖调控茶园冠层微环境及其对碾茶类黄酮组成的影响[J].茶叶科学,2026,46(4):637-650,14.基金项目
浙江省"三农九方"科技协作项目(2025SNJF068) （2025SNJF068）
