7种彩叶树种光合特性分析  

Analysis of photosynthetic characteristics of seven colored-leafed trees

作　　者：王少杰[1] 付宇辰 冷平生[1] 李迎春 赵爽 胡增辉[1] 

机构地区：[1]北京农学院园林学院,城乡生态环境北京实验室,北京102206 [2]北京市黄垡苗圃,北京102601

出　　处：《河北林果研究》2017年第3期269-276,283,共9页Hebei Journal of Forestry and Orchard Research

基　　金：北京市属高等学校创新团队建设与教师职业发展计划项目“景观花卉种质创新与应用”(IDHT20150503);北京林果业生态环境功能提升协同创新中心项目(CEFF-PXM 2016-014207-000038)

摘　　要：为了更好地了解北方常见彩叶树种的生态特性,采用LI-6400便携式光合仪测定了自然生长状态下7种彩叶树种的净光合速率(Pn)、气孔导度(Gs)、细胞间二氧化碳浓度(Ci)、蒸腾速率(Tr)等光合特征,结果表明,7种彩叶树种最大净光合速率从大到小依次为彩叶豆梨、秋紫白蜡、金叶接骨木、全红杨、紫叶稠李、金叶风箱果、紫叶风箱果,其中,彩叶豆梨的最大净光合速率最高,为14.93μmol/(m^2·s),紫叶风箱果的最大净光合速率最低,为8.65μmol/(m^2·s);紫叶风箱果、彩叶豆梨的净光合速率与气孔导度之间呈现显著正相关的关系,相关系数分别为0.910、0.893;紫叶风箱果、金叶风箱果、紫叶稠李、彩叶豆梨的净光和速率与有效辐射呈显著正相关,相关系数分别为0.887、0.920、0.946和0.959;其中彩叶豆梨、紫叶稠李、全红杨、秋紫白蜡、金叶接骨木的光饱和点分别为1 166μmol/(m^2·s)、1 010μmol/(m^2·s)、836μmol/(m^2·s)、1 136μmol/(m^2·s)、1 456μmol/(m^2·s),紫叶风箱果、金叶风箱果的光饱和点均较低,分别为508μmol/(m^2·s)和424μmol/(m^2·s),较高的光饱和点使植物更好地适应当地中午高光条件,较低的光饱和点与光补偿点使植物表现出耐阴的特点。To have a better knowledge of c o m m o n colorful-leafed plants in north of China and to explore their ecological characteristics,w e measured photosynthetic rate （P n）, stomatal conductance （Gs）,intercellular CO 2 concentration 〇 and transpiration rate （Tr） of seven color-leafed plants under natural conditions by using Li-6400 portable photosynthesis analy-zer system. The resutt shows the decreasing order of maximum phoseven colorful plants is： P yrus ussuriensis 4H o n g y e ·, Fraxinus chinensis / Autumu Purple, Sanbucus x vHUansii ‘ PlumosaAurea’,Populus deltoides i Quanhong·, Prunus virginiana 4Red Select Shurb·,Physocarpus opiifolius 4Darts Gold·,and Physocarpus oplifolius ‘Diabolo’ . Pyrus ussuriensis / Vongye· has the highest m a x i m u m net photosynthetic rate a-mong these seven plants, which is 14. 93 $mol/（m 2 · s） # and the tosynthetic rate is Physocarpus oplifolius ‘Diabolo’,which is 8. 65μmol/（m 2 · s） . Photo-synthetic rate have significant positive correlation with stomatal conductance. The correla-tion coefficient between Pn and Gs of Physocarpus oplifolius 4Diabolo’ and Pyrus ussurien-sis ‘ Hongye ’ are 0. 910 and 0. 893 respectively. Pn also has significant positive correlationwith photosynthetic active radiation. The correlation coefficient between photosynthetic ac-tive radiation and the rate of net photosynthesis of Physocarpus oplifolius 4Diabolo’ , Phy-socarpus oplifolius ‘ Darts Gold’, Prunus virginiana · Red Select Shurb’ and Pyrus ussu-riensis / Hongye’ are 0. 887,0. 920,0. 946,0. 959 respectively. The light saturated point of Pyrus ussuriensis ‘ Hongye ’, Prunus virginiana ‘Red Select Shurb ’ , Populus deltoides ‘ Quanhong ’, Fraxinus chinensis ‘ A u t u m u Purple ’, and Sambucus vuiUiamsll ‘Plumosa Aurea’ are 1 166 μmol/（m 2 · s）,1 010 Smol/（m 2 · s）,836μmol/（m 2 · s）,1 and 1 456μmol/（m 2 · s） respe

关 键 词：彩叶植物 光合特性 光补偿点 光饱和点 日变化 

分 类 号：S687[农业科学—观赏园艺]