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文章通过微型蒸渗器和土壤水分烘干称重法测定了洋葱不同节水灌溉技术条件下灌溉水消耗及水分利用效率,并结合气象数据比较不同灌水技术的优越性,测定了洋葱地土壤水分变化规律、生育期耗水规律、土面蒸发规律及水分利用效率,分析不同灌溉方式对洋葱水分利用效率的影响。研究结果表明,在石羊河流域,洋葱采用节水灌溉技术能有效地减少作物生育期耗水量,不同节水技术可减少洋葱耗水量1 60 mm以上,其中棵间蒸发减少90 mm以上,水分利用效率提高20%以上,在实际生产中可根据水源、基础设施、技术掌握难易程度等选择适宜洋葱的节水灌溉技术。
In this paper, the irrigation water consumption and water use efficiency under different water-saving irrigation techniques were measured by micro-steamer and soil moisture drying weighing method. By comparing meteorological data with the superiority of different irrigation techniques, the soil moisture The law of change, the law of water consumption during growing period, the law of soil surface evaporation and water use efficiency, and analyzed the effects of different irrigation methods on onion water use efficiency. The results showed that in Shiyanghe River Basin, using water-saving irrigation technology can reduce the water consumption of crops during the growth period. Different water-saving technologies can reduce the water consumption of onion more than 160 mm, with the decrease of more than 90 mm in evaporation, Use efficiency increased by 20% or more, in the actual production can be based on water, infrastructure, technology and easy to choose the appropriate water-saving irrigation onions technology.