齿瓣石斛光合特性研究  

Study of Photosynthetic Characteristics of Dendrobium devonianum

作　　者：刘高慧 李昆[1] 孙永玉[1] 侯锐[1] 闫红[1] 

机构地区：[1]中国林业科学研究院资源昆虫研究所,云南昆明650224

出　　处：《林业科学研究》2014年第2期265-269,共5页Forest Research

基　　金：国家林业科学技术推广项目"药用石斛繁育与栽培关键技术推广示范[2012]27号";国家林业公益性行业专项"金沙江河谷生态公益林结构调控与资源培育研究201304202

摘　　要：石斛（Dendrobium SW．）为兰科（Orchidaceae）多年生草本植物，常附生于温暖湿润半荫环境下的树干或岩石上，生长缓慢，是我国传统名贵中药。目前发现的石斛属植物有1500多种，主要分布在亚洲热带和太平洋岛屿的东亚、东南亚及澳大利亚等地区。In order to study the photosynthetic characteristics of Dendrobium devonianum, the diurnal dynamics of photosynthesis and the response of photosynthetic rate to photosynthetic active radiation and CO2 were analyzed by LI-6400 portable photosynthesis analysis system under overshadow conditions. The results showed ： （ 1 ） The diurnal variation of D. devonianum followed a double-peaks curve, there was obvious midday depression of photosynthesis. （2） The change rule of the response of photosynthetic rate to photosynthetic effective radiation and CO2 were simi- lar, the critical points of light compensation and saturation of D. devonianum were 4. 4 and 182. 5 μmol · m^-2 · s^-1 , respectively; the apparent quantum efficiency was 0. 03 mol · mol^-1 Its CO2 compensation point and satura-tion point were 162.5 and 1 240. 25 μmol · m^-2 ·s^-1, respectively; its carboxylation efficiency was 0. 004. （3） D. devonianum, as the same as other Dendrobium plants, belong to shade plants, therefore, shading and tempera-ture and humidity controlling are needed in the cultivation and management.

关 键 词：齿瓣石斛 光合特性 生长环境 

分 类 号：S718.4[农业科学—林学]