紫金牛光合速率及其生理生态因子日变化研究  

Diurnal variation of photosynthetic rate and its eco-physiological factors of Ardisia japonica(Thunb.) Blune

作　　者：黄会国 王旭军[2,3] HUANG Huiguo;WANG Xujun(Forestry Bureau of Sangzhi County, Sangzhi 427199, China;Hunan Academy of Forestry, Changsha 410004, China;Hunan Engineering Research Center for Cultivation and Utilization of Distinctive Bio-resources under Forest, Changsha 410004, China)

机构地区：[1]桑植县林业局,湖南桑植427199 [2]湖南省林业科学院,湖南长沙410004 [3]湖南省林下特色生物资源培育与利用工程研究中心,湖南长沙410004

出　　处：《湖南林业科技》2019年第2期47-51,共5页Hunan Forestry Science & Technology

基　　金：湖南省科技创新平台与人才计划(2016TP2009)

摘　　要：利用Li-COR6400便携式光合作用测定系统对紫金牛的光合速率日变化进行研究。结果表明:紫金牛叶片净光合速率日变化呈双峰曲线,最高峰出现8:00,次高峰出现在14:00,有明显的"午休"现象,非气孔因素是导致午休的主要原因。相关分析和回归分析表明,紫金牛光合速率的主要影响因子为气孔导度。紫金牛叶片光能利用率和水分利用效率随着光合有效辐射的增强而降低,说明紫金牛对弱光的利用能力较强。The diurnal variation of net photosynthetic rate of Ardisia japonica (Thunb.)Blune and its eco-physiological factors were investigated by using Li-COR portable photosynthesis system. The results showed as following: the diurnal variation of net photosynthetic rate of A. Japonica in sunny day varied with double peak curve, and the peaks occurred at 8 : 00 and 14 : 00, respectively, showing obvious midday depression. Which were mainly controlled by non-stomatal limitation. Correlation analysis and regression analysis showed that the dominantly influencing factor of net photosynthetic rate of A. japonica was stomatal conductance. Light use efficiency (LUE) and water use efficiency (WUE) were decreased with the increase of photosynthetically active radiation (PAR), which indicated that A. japonica has rather greater potential to utilize poor light.

关 键 词：紫金牛 光合速率 生理生态因子 日变化 

分 类 号：Q949.773.1[生物学—植物学]