施用氮钾肥对大葱产量和经济效益的影响

为了明确氮、钾肥对大葱产量和经济效益的影响,开展了多年施用不同数量的氮、钾肥对大葱产量和经济效益的影响试验。结果表明,增施钾肥对大葱生长发育有明显的促进作用,并能显著提高产量。白庙和黄岭地区试验在氮肥(纯N)水平为225、300 kg/hm~2时,大葱经济产量分别增加11.9%～16.8%和13.2%～21.1%,平均分别增长13.9%、16.7%,大葱产量均随钾肥施用量的加大而提高。在氮肥低用量条件下,适当增加氮肥施用量,也能有效提高大葱的经济产量,不同钾肥(K2O)用量下施氮肥大葱可增产9.9%～14.8%,平均增产12.5%;其中,白庙地区大葱产值增收26 160～41 900元/hm~2,产投比为20.22～43.21。

Effect of Nitrogen and Potassium Fertilizer on Yield and Profit Profit of Chinese Onion

In order to explore the effects of different rates of nitrogen and potassium fertilizer on yield and profit of Chinese onion(Allium fistulosum L.), field experiments of two sites two years were conducted in Anhui province. The results showed that more potassium fertilizer application can improve the growth and development of Chinese onion, and increase the profit significantly. The economic yield of Chinese onion increased with increase of potassium fertilizer. Compared with K₀ treatments, the economic yields of Chinese onion increased by 11.9-16.8% and 13.2-21.1%, and the average economic yields increased 13.9% and 16.7% under N₂₂₅ and N₃₀₀ levels. Increasing application of nitrogen can improve economic yields of Chinese onion effectively at low nitrogen fertilizer level. The economic yields in N₃₀₀ levels were 9.9-14.8% (average 12.5%) higher compared to N₂₂₅ levels. The profit increased by 26,160- 41,900 yuan/hm^₂ and the vale cost ration reached (20.22-43.21):1 compared the treatments of K application to the control.