大白菜氮磷钾肥料配施效应研究

Effects of combined applications of nitrogen,phosphorus and potassium fertilizers on Chinese cabbage

采用"3414"试验设计方案,研究了不同氮、磷、钾施肥处理对大白菜产量、经济效益的影响及肥料效应。结果表明:合理施用氮、磷、钾肥能够产生显著的增产、增收效果,空白区产量<缺氮区产量<缺钾区产量<缺磷区产量;氮的增产效应>钾的增产效应>磷的增产效应;单位养分增产量,全肥区>缺钾区>缺氮区>缺磷区;氮、磷、钾互作效应最高,其次为氮、钾和氮、磷,磷、钾互作效应较差。通过模型分析得氮(N)、磷(P2O5)、钾(K2O)的最佳施用量分别为195、110和265 kg/hm2,可获得理论产量为82 162 kg/hm2。

Using ＂3414＂experiment plan,different NPK fertilization effects on Chinese cabbage yield,economic benefit and fertilizer effect were studied.The results showed that reasonable application of nitrogen phosphorus potassium fertilizer could significantly increase the production.The order was blank yield N deficiency yield P deficiency yield K deficiency yield.The yield increasing effect was N K P.The unit nutrient yield increasing effect was NPK NP PK NP.According to the analysis of model,the optimum amounts on fertilization of N,P2O5,and K2O were 195,110 and 265 kg / hm2.Thus,the theoretical yield of Chinese cabbage could be obtained as 82 162 kg / hm2.