春季生态因子对武夷四照花光合作用的影响研究  

Effects of Ecological Factors on Photosynthesis of Dendrobenthamia angustata var.wuyishanensis in Spring

作　　者：郭振[1] 黄成林[2] 

机构地区：[1]六安职业技术学院城市建设学院,安徽六安237000 [2]安徽农业大学林学与园林学院,安徽合肥230036

出　　处：《安徽农学通报》2015年第17期39-42,共4页Anhui Agricultural Science Bulletin

摘　　要：采用Li-6400便携式光合测定仪,在春季对武夷四照花的光合日变化进行测定,通过相关分析和通径分析,得出净光合速率与影响因子之间的关系,并拟合光响应曲线,利用多元回归分析建立相应的多元方程。结果表明:武夷四照花叶片Pn的日变化呈双峰曲线型,具有典型的光合"午睡"现象;气孔导度和相对湿度是直接影响武夷四照花叶片Pn的主要因子;武夷四照花的光补偿点为26.02μmol photons·m-2·s-1,光饱和点为670.01μmol photons·m-2·s-1,补偿点、饱和点均较低,属于耐阴植物。Using Li-6400 portable photosynthetic apparatus,photosynthesis diurnal variation of Dendroben-thamia angustata var.wuyishanensis in spring was determined. Through correlation analysis and path analy-sis,this paper assessed the relationship between net photosynthetic rate（Pn）and impact factors and light re-sponse curve fitting. Multiple regression analysis is used to establish the corresponding equation. The re-sults showed that：the diurnal variation of Pn had the double-peak curve,the typical photosynthetic“nap”phe-nomenon;relative humidity and stomatal conductance were the most important directfactors to influence the changes of Pn. The light saturation point was 26.02μmol photons · m-2 · s-1and the light saturation point was 670.01μmol photons·m-2·s-1,so D.angustata var.wuyishanensis is shade plants.

关 键 词：武夷四照花 光合作用 生态因子 

分 类 号：S685.99[农业科学—观赏园艺]