施用氮钾肥对大葱产量和经济效益的影响

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

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26160~41900元/hm^(2),产投比为20.22~43.21。

In order to determine the effect of nitrogen and potassium fertilizer on the yield and economic benefit of Chinese onion,the effect of nitrogen and potassium fertilizer in different quantities on the yield and economic benefit of Chinese onion tests were carried out.The results showed that more potassium fertilizer application could promote the growth and development of Chinese onion,and significantly increased the yield.In Baimiao area and Huangling area,the economic yield of Chinese onion increased by 11.9%-16.8%and 13.2%-21.1%under nitrogen fertilizer(pure nitrogen)level of 225,300 kg/hm^(2),with average growth of 13.9%and 16.7%,respectively.The yield of Chinese onion increased with the increase of potassium fertilizer application rate.Under the condition of low nitrogen application rate,the economic yield of Chinese onion could also be effectively improved by appropriately increasing the application rate of nitrogen fertilizer.Under different potassium fertilizer(K2O)application rate,the economic yield of Chinese onion increased by 9.9%-14.8%,with average increased by 12.5%;the output value of Chinese onion in Baimiao area increased by 26160-41900 yuan/hm^(2),and the value-cost ratio was 20.22-43.21.