Under high temperture and low irradiance in summer, the photosynthetic capacity of ear leaves for Yayu 2 and that of Chengdan 202 were raised by 40mg/kg and 10mg/kg S-3307 treatment, respectively.

• 40mg/kg和10mg/kg的烯效唑处理分别显著提高了雅玉2号和成单202夏季中午高温弱光下穗位叶的光合能力。