温室栽培‘金牡丹’茶树新梢不同叶位叶片的光合特性  

Photosynthesis of Young Shoots on Greenhouse‘Jinmudan’Tea Plant

作　　者：孙君[1,2,3] 朱留刚 张文锦[1,2,3] SUN Jun;ZHU Liu-gang;ZHANG Wen-jin(Tea Research Institute,Fujian Academy of Agricultural Sciences,Fuzhou,Fujian 350013,China;Scientific Observing and Experimental Station of Tea Tree and Oolong Tea Processes in Fujian,Ministry of Agriculture and Rural Affairs of the People’s Repulic of China,Fu’an,Fujian 355015,China;National Agriculcural Experimental Station for Soil Quality,Fu’an,Fujian 355015,China)

机构地区：[1]福建省农业科学院茶叶研究所,福建福州350013 [2]农业农村部福建茶树及乌龙茶加工科学观测实验站,福建福安355015 [3]国家土壤质量福安观测实验站,福建福安355015

出　　处：《茶叶学报》2024年第4期44-49,共6页Acta Tea Sinica

基　　金：福建省省属公益类科研院所基本科研项目(2023R1092)。

摘　　要：【目的】研究温室栽培环境下‘金牡丹’茶树不同发育阶段叶片的光合特性,为其栽培管理技术提供理论支撑。【方法】采用GFS-3000便携式光合作用测定系统测定金牡丹茶树中小开面新梢不同叶位叶片的光合特性,并采用直角双曲线修正模型进行光响应曲线拟合。【结果】温室内茶树新梢不同叶位叶片(中开面第1至3叶和小开面第2至4叶)的净光合速率(P_(n))为2.63~4.74μmol·m^(-2)·s^(-1),以中开面第1叶最小,第3叶最大;蒸腾速率(T_(r))在2.31~5.97 mmol·m^(-2)·s^(-1)之间,以中开面第1叶最小,第2叶最大;最大净光合速率(P_(nmax))、饱和光强(LSP)以中开面第3叶最大(7.40μmol·m^(-2)·s^(-1)、1 208.10μmol·m^(-2)·s^(-1)),第1叶最小(3.20μmol·m^(-2)·s^(-1)、867.03μmol·m^(-2)·s^(-1));光补偿点(LCP)为中开面第1叶(32.95μmol·m^(-2)·s^(-1))>第2叶(25.93μmol·m^(-2)·s^(-1))>第3叶(20.53μmol·m^(-2)·s^(-1))。【结论】中开面茶树叶片整体净光合速率高于小开面;中开面茶梢利用强光、弱光以及整体叶片的光合潜能以中开面第3叶最佳。【Objective】Photosynthetic characteristics of young shoots at developmental stages on‘Jinmudan’Tea plant in a greenhouse were analyzed for improved cultivation.【Method】A portable GFS-3000 photosynthesis measurement device was used to determine the net photosynthetic rate(Pn),transpiration rate(Tr),maximum net photosynthetic rate(Pnmax),saturated light intensity(LSP),and light compensation point(LCP)of“small unfurled”shoots(SUFS)and“medium unfurled”shoots(MUFS)located on top of branches of Jinmudan Tea plant.The collected data were fitted with light exposure to formulate a response function using the modified rectangular hyperbolic model.【Result】The measurements on P_(n) of the shoots ranged 2.63-4.74μmol·m^(-2)·s^(-1) with the 1^(st) MUFS on a plant being the lowest and the 3^(rd) MUFS the highest,while Tr ranged 2.31-5.97 mmol·m^(-2)·s^(-1) with the 1st MUFS being the lowest and the 2nd MUFS the highest.Among the young shoots on a plant,the greatest Pnmax of 7.40μmol·m^(-2)·s^(-1) and LSP of 1208.10μmol·m^(-2)·s^(-1) were found on the 3rd MUFS and the lowest of 3.20μmol·m^(-2)·s^(-1) and that of LSP of 867.03μmol·m^(-2)·s^(-1),on the 1st MUFS.The LCP ranked as 1st MUFS at 32.95μmol·m^(-2)·s^(-1)>2nd MUFS at 25.93μmol·m^(-2)·s^(-1)>3rd MUFS at 20.53μmol·m^(-2)·s^(-1).【Conclusion】In general,Pn of MUFS was greater than that of SUFS.The 3rd MUFS could more efficiently utilize strong or weak light as well as have a greater overall photosynthesis potential.

关 键 词：温室 茶树 光响应 叶位 净光合速率 

分 类 号：TS272.59[农业科学—茶叶生产加工]