氮磷钾肥平衡施用对素花党参产量的影响

为探明党参高产栽培的最佳施肥量和施肥配比,建立氮、磷和钾肥肥料效应模型,以素花党参为试验材料,采用"3414"肥料效应试验设计方案,研究氮、磷和钾肥平衡施用对素花党参产量的影响。结果表明:施肥处理党参产量显著高于不施肥处理,增产率达29.7%;缺氮和缺钾处理其产量显著低于缺磷处理,对党参产量的影响依次为氮钾磷;氮、磷及钾肥之间存在一定的交互作用,互相影响肥效的发挥,任一因素过量施用均会导致产量显著降低。根据一元二次肥效模型得出党参氮(N)、磷(P2O5)和钾(K2O)的最佳施用量分别为197kg/hm~2、140kg/hm~2和298kg/hm~2,适宜的氮∶磷∶钾为10∶7∶15。

Effects of Balanced Fertilization on Yield of Codonpsis pilosula

To explore the optimum fertilization amount and fertilizer proportion for high-yield cultivation of C.pilosula,and establish the fertilization efficiency model,by using "3414" experiment plan,different nitrogen,phosphorus and potassium fertilization effects on C.pilosula yield was studied.Results:C.pilosula yield of the fertilization treatments were significantly higher than those of the treatments without fertilization,the yield increasing rate was 29.7％.The yield of the nitrogen and potassium deficiency treatment are significantly lower than the phosphorus deficiency treatments,and the effects on the yield followed the sequence of N＞K2O＞P2O5.The results also showed beneficial interactions among nitrogen,phosphorus and potassium.Any excessive application of three factors could result in reducing the yield significantly.According to the analysis of model,the optimum amounts on fertilization of N,P2O5 and K2O were 197 kg/hm2,140 kg/hm2and 298 kg/hm2.The suitable ratio of N ∶P2O5 ∶ K2O was 10 ∶ 7 ∶ 15.