膜下滴灌条件下甘肃河西地区洋葱生产中的减氮与节水效应

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关键词：减氮节水；洋葱；产量；水分利用效率

中图分类号：S633.2 文献标志码：A 文章编号：2097-2172（2025）12-1123-05

doi：10.3969/j.issn.2097-2172.2025.12.008

Effects of Nitrogen Reduction and Water Saving on Onion Production in Hexi Area of Gansu under Mulched Drip Irrigation Conditions

KUAIJialin¹，ZHANGYuxin¹，MAYanxia’，ZHANGXiangyu²，YUQingwen1 （1.Institute of Vegetables， Gansu Academy of Agricultural Sciences，Lanzhou Gansu 73Oo70，China; 2.NewnemBeijing Seed Co.，Ltd.，Beijing100176，China）

Abstract：Toestablisharationalirigationandfertilizationregimeand promotethesustainabledevelopmentof theonion industryinGansu，4iigatiofertizationheesreevaluateduderaulcddripiigationsystem：conentioalrgn rate + conventional irrigation（CK）， 70% conventional nitrogen + conventional irrigation， 70% conventional nitrogen +78% conventional irrigation，and 70% conventional nitrogen +60% conventional irrigation. Results showed that a 22% reduction in irrigation on the basis of 30% nitrogenreduction hadno adverse impactononiongrowthandyield.Under thiscondition，onion yieldreached98879.4 kg/ha， which was 0.15% higher than the conventional treatment. Total water consumption during the growing period decreased by 13.47% ，and water use efficiency increased by 15.66% .Therefore，an irigation-fertilization regime combining 30% nitrogen reduction and 22% water saving under mulched drip irrigation is an appropriate management practice for effcient onion production in the Hexi region.

Key Words： Nitrogen-reduction; Onion; Yield; Water use efficiency

甘肃省河西地区因日照时间长，昼夜温差大，病虫害发生较轻，是甘肃省内长日型洋葱集约化、规模化生产的优势区域，近年来种植面积稳定在2.0万 hm2 左右［1-3]。（剩余5844字）