姜叶片晴天中午的表观量子效率 (AQY)和PSⅡ光化学活性 (Fv/Fm)显著降低 ,表明有明显的光抑制现象 ,而干旱、高温、强光等逆境条件可显著加重光抑制程度。土壤水分胁迫使光呼吸速率(Pr)降低 ,峰值提前 ,Pr/Pn升高 ;同时使叶黄素循环库增大 ,(A +Z) /(V +A +Z)上升 ,表明光呼吸和叶黄素循环是姜叶片耗散过剩光能的重要途径 The apparent quantum yield (AQY) and PSⅡ photochemical activity (Fv / Fm) of ginger leaves decreased significantly at noon on the sunny day, indicating that there was a significant photoinhibition phenomenon. However, the photosynthetic rate was significantly increased under the adverse conditions of drought, high temperature and intense light. Under the condition of soil water stress, the light respiration rate (Pr) decreased, the peak value increased earlier, and Pr / Pn increased. At the same time, the lutein cycle increased and (A + Z) / (V + A + Z) Lutein cycle is an important way to dissipate excess energy of ginger leaves