白蜡优良无性系光合特性日变化研究  

Photosynthetic Characteristics Diurnal Variation of Superior Clones of Fraxinus chinensis

作　　者：李永涛[1] 王霞[1] 王振猛[1] 魏海霞[1] 周健[1] 刘德玺[1] 亓文琪 赵春周 

机构地区：[1]山东省林业科学研究院,山东济南250014 [2]山东省寿光市国有机械林场,山东寿光262716

出　　处：《安徽农业科学》2014年第33期11786-11787,11815,共3页Journal of Anhui Agricultural Sciences

基　　金：山东省自主创新专项(2012CX90303);国家级星火计划项目(2012GA740003);山东省农业良种工程项目[鲁农字(2010)6号]

摘　　要：[目的]探索白蜡光合作用与环境变化的关系。[方法]以白蜡优良无性系鲁蜡5号及原生绒毛白蜡为试材,对其自然生长条件下主要光合生理指标进行了测定。[结果]鲁蜡5号与对照光合速率日变化曲线均呈双峰型,峰值出现在10:00和16:00,有明显的光合午休现象;温度在32.85℃时净光合速率最大,两者无明显差异;在强光条件下,鲁蜡5号的净光合速率、蒸腾速率、气孔导度及胞间CO2浓度均高于对照;经相关性分析,鲁蜡5号的净光合速率与蒸腾速率呈显著正相关,气孔导度与湿度呈显著正相关,胞间CO2浓度与温度呈显著负相关,与湿度呈显著正相关。[结论]为白蜡栽培管理提供了理论依据。[Objective] The aim was to explore the relationship between photosynthesis of Fraxinus chinenesis and environmental change.[Method] The photosynthetic characteristics under natural growth conditions of Fraxinus pennsylvanica ‘ Lula Wuhao’ and native Fraxinus velutina were studied.[Result] The diurnal photosynthetic rate of Fraxinus pennsylvanica ‘Lula Wuhao’ and the contrast varied with two peak curves.The peaks occurred at 10：00 and 16：00.It had midday depression obviously.The net photosynthetic rate reached maximum at 32.85 ℃,and there was no significant difference between them.Under the strong light condition,the net photosynthetic rate,transpiration rate,stomatal conductance and intercellular CO2 concentration of Fraxinus pennsylvanica ‘ Lula Wuhao’ were higher than the contrast.After the correlation analysis,the net photosynthetic rate of Fraxinus pennsylvanica ‘ Lula Wuhao’ had a significant positive correlation with transpiration rate; the stomatal conductance had a significant positive correlation with the humidity; the intercellular CO2 concentration had a significant positive correlation with the humidity,and had a negative significant correlation with the temperature.[Conclusion] The results provide theoretical basis for cultivation management of Fraxinus chinenesis.

关 键 词：白蜡 光合作用 日变化 

分 类 号：S718.554.1[农业科学—林学]