巫山淫羊藿光合生理日变化及其主要影响因子研究

Diurnal Variation of Photosynthesis and Mian Influential Factors of Epimedium wushanense

采用Li-6400光合作用测定系统测定巫山淫羊藿叶片光合生理日变化,并用SPSS19.0相关性分析探讨了巫山淫羊藿光合生理特征参数及其环境影响因子的相互关系,为巫山淫羊藿资源的种植栽培提供理论参考依据.结果显示:巫山淫羊藿叶片的最大净光合速率为5.28μmol CO_2·m^(-2)·s^(-1);其净光合速率、气孔导度和蒸腾速率的日变化均呈双峰曲线,影响净光合速率的主要环境因子是相对空气湿度.水分利用效率日变化与净光合速率显著正相关,与胞间CO_2浓度负相关.

In order to provide the theoretical reference for planting Epimedium wushanense,the diurnal variation of physiological parameters of Epimedium wushanense were tested by using the Li-6 400 portable photosynthesis,and the correlations between the physiological parameters and the environmental factors were analyzed by SPSS19. 0 software. The results showed that the Maximum net photosynthetic rate of Epimedium wushanense is 5.28 μCO_2 mol· m^（-2）·s^（-1）. A bimodal curve was founded for net photosynthetic rate,stomata conductance and transpiration rate. The most important factor of net photosynthetic rate is air humidity. The water use efficiency is significantly positive correlation with the net photosynthetic rate,and is negatively related to CO_2 concentration between cells.