Currently, with the shortage of agricultural water resources, research on water-saving irrigation is of great significance for the improvement of water productivity. In this research, the economic irrigation quotas for summer maize in years with different precipitation levels were determined according to the growth function of summer maize, aiming to maximize the net benefit of water consumption units. Based on the economic irrigation quotas, the irrigation schedule of summer maize was optimized by the AquaCrop model. The results show that in wet years, summer maize does not need irrigation. In normal years, summer maize only needs to be irrigated once at the seedling stage and once at the jointing stage to reach a maximum yield of 7.23 t/ha and a water productivity of 2.25 kg/m³, with an irrigation quota of 25 mm and a total irrigation amount of 50 mm. In dry years, summer maize needs to be irrigated once at the seedling stage, jointing stage, and flowering stage, with an irrigation quota of 46.6 mm and a total irrigation amount of 140 mm. Under this condition, the summer maize yield reaches a maximum of 7.20 t/ha, and the water productivity is 1.99 kg/m³.

中文翻译：

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基于经济灌溉定额和 AquaCrop 模型的灌溉计划优化*

当前，在农业水资源短缺的情况下，研究节水灌溉对提高水资源生产率具有重要意义。本研究根据夏玉米的生长函数确定不同降水量年份夏玉米的经济灌溉定额，以实现用水单位的净收益最大化。基于经济灌溉定额，利用AquaCrop模型优化夏玉米灌溉计划。结果表明，在湿润年份，夏玉米不需要灌溉。在正常年份，夏玉米只需在苗期和拔节期浇水一次，即可达到最高产量7.23 t/ha和2.25 kg/m ³的水分生产率。，灌溉定额为 25 毫米，总灌溉量为 50 毫米。旱年夏玉米需在苗期、拔节期、开花期浇水一次，定额为46.6毫米，总灌水量为140毫米。在此条件下，夏玉米产量最高可达7.20 t/ha，水分生产力为1.99 kg/m ³。