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在连续多年创小麦超高产纪录试验田,通过Li-6400便携式光合测定仪,采用开放式气路测定旗叶净光合速率、胞间二氧化碳摩尔分数、气孔导度等相关指标,研究灌水量和灌水期对超高产小麦灌浆期光合特性、水分利用率和产量的影响。结果表明,在灌水0～300毫米,灌水对超高产小麦生育后期的光合特性有显著调节作用;与对照处理相比,灌水可显著提高超高产小麦灌浆期旗叶SPAD值和叶面积指数,使小麦能够保持较好的叶片结构和功能状况,这是小麦获得超高产的基础;随着灌水量增加,超高产小麦旗叶气孔导度
In the field of continuous record high yield of wheat for many years, Li-6400 portable photosynthesis tester was used to measure the net photosynthetic rate of flag leaves, the molar fraction of intercellular carbon dioxide and the stomatal conductance by using open air way to study the effects of irrigation amount and irrigation period On photosynthetic characteristics, water use efficiency and yield of super high-yielding wheat during grain filling stage. The results showed that irrigation at 0-300 mm irrigation had significant effects on the photosynthetic characteristics of super-high-yielding wheat at the later growth stage. Compared with the control, irrigation could significantly increase the flag leaf SPAD and leaf area index Wheat can maintain good leaf structure and functional status, which is the basis for wheat to achieve super high yield. With the increase of irrigation, the stomatal conductance