摘要：本文以木芙蓉为实验材料，研究阴、阳生木芙蓉气体交换参数对光、温的响应。测定了不同光温条件下，阴、阳生木芙蓉光合速率Pn、蒸腾速率E、胞间CO2浓度Ci、气孔导度Gs。结果表明,随着光强和温度的升高，阴、阳生木芙蓉的净光合速率、蒸腾速率逐渐升高，而胞间CO2浓度随光强和温度的的递增而递减；气孔导度随温度的的递增而递减，随光强的递增而递增。阳生木芙蓉的光合生理表现优于阴生木芙蓉。本研究结果发现木芙蓉更适于在阳生环境下栽培，为木芙蓉的园林绿化提供技术参考。

关键词：木芙蓉;气体交换参数;光强;温度

Abstract：With the hibiscus mutabilis in shade and sun as material, response of gas-exchange parameters in hibiscus mutabilis on light intensity and temperature were studied in this paper. The photosynthetic rate( Pn), transpiration rate( E ) , intercellular CO2 concentration (Ci), stomatal conductance( Gs) were determined. Experiments show that with the increase of light intensity , Pn and E were on increase, while the Ci and Gs were on decrease. Based on the results, hibiscus mutabilis in the sun photosynthetic physiological performance superior to the hibiscus mutabilis in the shade. The results of this study found that Hibiscus is more suitable for cultivation in the sun environment, and provide technical reference for the Hibiscus landscaping.

Key words: hibiscus mutabilis; gas-exchange parameters; light intensity; temperature