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以广利灌区冬小麦为研究对象,通过测坑试验,研究确定在新的生产条件下作物各生育阶段的日需水强度、阶段需水量和全生育期需水量。同时调查不同水分条件下冬小麦产量变化情况,在此基础上,分析作物各生育阶段耗水量与产量的关系,建立作物水分生产函数模型,分析确定作物的需水主、次关键时期和灌水关键期。结合不同供水条件下冬小麦各生育阶段的水分状况、冬小麦耗水量和最终产量的观测结果,分析确定冬小麦生育阶段的适宜土壤水分控制指标,为制定节水高效灌溉制度提供参考依据。
Taking the winter wheat in Kwangli irrigation area as the research object, the daily water requirement, the stage water demand and the water requirement of the whole growth period under different production stages were determined by the test pit test. At the same time, the changes of winter wheat yield under different water conditions were investigated. On the basis of this, the relationship between water consumption and yield at each growth stage of the crop was analyzed. A model of crop water production function was established to determine the main and secondary critical periods of water demand and irrigation key period . Based on the observation of the water status, the water consumption and the final yield of winter wheat at different growth stages under different water supply conditions, the suitable control indexes of soil moisture during the growth stage of winter wheat were analyzed and analyzed, which provided a reference for the development of water-saving and high-efficiency irrigation system.