箭叶淫羊藿光合特性研究  

Photosynthetic characteristics of Epimedium sagittatum

作　　者：王旭军[1,2] 张玉荣 曹展硕[3] 向玉龙 WANG Xujun;ZHANG Yurong;CAO Zhanshuo;XIANG Yulong(Hunan Academy of Forestry,Changsha 410004,China;Hunan Engineering Research Center for Cultivation and Utilization of Distinctive Bio-resources under Forest,Changsha 410004,China;Hunan Agricultural University,Changsha 410128,China;Forestry Bureau of Sangzhi,Sangzhi 427199,China)

机构地区：[1]湖南省林业科学院,湖南长沙410004 [2]湖南省林下特色生物资源培育与利用工程技术研究中心,湖南长沙410004 [3]湖南农业大学农学院,湖南长沙410128 [4]桑植县林业局,湖南桑植427199

出　　处：《湖南林业科技》2018年第1期22-27,共6页Hunan Forestry Science & Technology

基　　金：湖南省科技计划项目(2016NK2163);湖南林业科技计划项目(XKL201710)

摘　　要：运用Li-6400便携式光合作用测定系统对郁闭林分下箭叶淫羊藿的光合作用日变化、光响应特性及CO_2响应特性进行了研究。结果表明:(1)箭叶淫羊藿光合作用日变化表现为单峰曲线,其峰值出现在上午10∶00左右,且影响其日变化的主要因素为叶片蒸腾速率、胞间CO_2浓度、光合有效辐射和大气CO_2浓度等;(2)箭叶淫羊藿的光补偿点为3.6μmol·m^(-2)·s^(-1),光饱和点为433.6μmol·m^(-2)·s^(-1),表观量子效率为0.038μmol·m^(-2)·s^(-1),验证了箭叶淫羊藿为典型的阴生植物,且利用弱光的能力较强;(3)箭叶淫羊藿CO_2补偿点为80.3μmol·mol^(-1),CO_2饱和点为1 656μmol·mol^(-1),羧化速率为0.008μmol·mol^(-1)。By using the Li-6400 Portable Photosynthesis System,the diurnal variation of the photosynthesis,light response curve and photosynthetic-CO2 response curve of Epimedium sagittatum were conducted in closed stand.The results indicate as followings:(1)The diurnal variation of the photosynthesis of Epimedium sagittatum presents as single-peak curve,which rises to the peak at 10∶00 am,and its main affecting factors are the transpiration rate(Tr),the intercellular CO2 concentratio(Ci),photosynthesis active radiation(PAR)and air CO2 concentratio(Ca),etc.(2)The light compensation point(LCP),the saturation point(LSP)and apparent quantum efficiency(AQE)are 3.6μmol·m-2·s-1,433.6μmol·m-2·s-1 and 0.038μmol·m-2·s-1,respectively,Which indicates that Epimedium sagittatum could perfectly acclimate to low light condition.(3)The CO2 compensation point(CCP),CO2 saturation point(CSP)and carboxylation efficiency(CE)are 80.3μmol·mol-1,1 656μmol·mol-1 and 0.008μmol·mol-1,respectively.

关 键 词：箭叶淫羊藿 光合日变化 光响应曲线 CO2响应曲线 

分 类 号：S567.239[农业科学—中草药栽培]