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在宁夏中部干旱区以圆葱“巴顿”品种为试材,研究了氮、磷、钾配施不同用量对圆葱干物质积累和产量的影响。结果表明:氮15kg/667m2、磷17.5kg/667m2、钾25kg/667m2(T1)处理对圆葱株高、叶片数、生长量有明显地促进作用,鳞茎产量5 580.83kg/667m2,较当地常规施肥氮10kg/667m2、磷12.5kg/667m2、钾20kg/667m2处理(CK)产量4 478.93kg/667m2,增产24.6%;氮20kg/667m2、磷22.5kg/667m2、钾30kg/667m2处理(T2)产量4 702.09kg/667m2,较CK增产4.98%,较T1减产15.75%;进而优化得出“巴顿”丰产高效的合理施肥模式为氮15kg/667m2、磷17.5kg/667m2、钾20kg/667m2,为当地圆葱大田栽培合理施肥提供参考和技术指导。
In the arid zone of central Ningxia, onion “Barton” was used as experimental material to study the effects of different amounts of nitrogen, phosphorus and potassium on dry matter accumulation and yield of onion. The results showed that: Nitrogen 15kg / 667m2, phosphorus 17.5kg / 667m2, potassium 25kg / 667m2 (T1) significantly promoted plant height, number of leaves and growth of bulb. The yield of bulb was 5 580.83kg / 667m2, Fertilization of nitrogen (10kg / 667m2), phosphorus (12.5kg / 667m2) and potassium (20kg / 667m2) resulted in a yield of 4778.93kg / 667m2 and an increase of 24.6% The yield was 4 702.09 kg / 667 m 2, which was 4.98% higher than that of CK and 15.75% lower than that of T1. The reasonable fertilization modes of “Barton” with high yield and high efficiency were 15kg / 667m2 nitrogen, 17.5kg / 667m2 phosphorus and 20kg / 667m2 potassium , For the local onion field cultivation and reasonable fertilization provide a reference and technical guidance.