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作者	单位
张雅倩，林琪，刘家斌，张洪生，赵长星	（青岛农业大学山东省旱作农业节水重点实验室，山东青岛 266109）

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中文摘要:

为给小麦抗旱育种和节水高产栽培提供理论和技术支持，在防雨旱棚池栽条件下研究了干旱胁迫对6个不同肥水类型小麦品种旗叶光合特性和产量的影响。结果表明，干旱胁迫条件下，小麦开花后旗叶的净光合速率、气孔导度、蒸腾速率、气孔限制值和单叶水分利用效率均呈下降趋势，而胞间CO₂浓度有所升高。其中，水浇地品种烟农21、烟农24和济麦22净光合速率、气孔导度、蒸腾速率、气孔限制值和单叶水分利用效率较低且下降幅度大，而旱地品种青麦6号、济旱5034和鲁麦21的净光合速率、气孔导度、蒸腾速率、气孔限制值和单叶水分利用效率较高且下降较为缓慢，而胞间CO₂浓度较低。青麦6号具有较高的抗旱指数，在干旱胁迫条件下能够保持较好的叶片结构和功能状况，是其获得高产的重要原因。

英文摘要:

Effect of drought stress on photosynthetic characteristics in flag leaf and yield of six different fertilizer and water types of wheat were studied under the condition of cultivation under rain proof shelter. The results showed that net photosynthesis rate, stomatal conductance, transpiration rate, stomatal limitation value and water use efficiency of flag leaf were decreased under drought stress after anthesis, while the intercellular CO₂ concentration increased at the same time. The net photosynthesis rate, stomatal conductance, transpiration rate, stomatal limitation value and leaf water use efficiency of cultivars Yannong 21,Yannong 24 and Jimai 22 used for irrigated field were lower and decreased in a large amplitude under drought stress. While net photosynthesis rate, stomatal conductance, transpiration rate, stomatal limitation value and leaf water use efficiency of cultivars Qingmai 6, Jihan 5034 and Lumai 21 used for dry land were relatively higher and declined more slowly, and intercellular CO₂ concentration was much lower. Qingmai 6 could maintain relatively superior leaf structure and functional status under drought stress, which was a reason achieving a relatively higher yield, and relatively high drought resistance index.

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