基于“3414”试验的红心甘薯新品种‘莆薯17’优化施肥技术研究

Research on the Optimized Fertilization Technology of the New Sweet Potato with Red Heart Variety‘Pushu 17’Based on the“3414”Experiments

为高产高效栽培红心甘薯新品种‘莆薯17’,采用“3414”肥料效应试验方案,研究氮磷钾配施对‘莆薯17’鲜薯产量的影响以及肥料效应。结果表明,影响‘莆薯17’产量的主要因素是钾肥,氮肥次之,磷肥最小。氮磷钾之间互作效应均可影响‘莆薯17’产量。氮磷钾施用量与‘莆薯17’产量的效应函数寻优结果表明,鲜薯获得最高产量(55646.98 kg/hm^(2))时的最大施肥量分别为氮肥206.88 kg/hm^(2)、磷肥100.37 kg/hm^(2)、钾肥252.86 kg/hm^(2),氮磷钾配比为1:0.49:1.22。氮肥最佳施肥量为199.42 kg/hm^(2),磷肥最佳施肥量为95.40 kg/hm^(2),钾肥最佳施肥量为238.50 kg/hm^(2),对应的最佳鲜薯产量为55574.07 kg/hm^(2),氮磷钾配比为1:0.48:1.2。

To provide scientific basis for the high-yield and efficient cultivation of the new variety sweet potato with red heart‘Pushu 17’,we studied the effect of combined application of nitrogen,phosphorus and potassium on yield and fertilizer effect based on“3414”experimental design scheme.The results showed that the main factor affecting the yield of‘Pushu 17’was the application of potassium fertilizer,followed by nitrogen fertilizer and phosphorus fertilizer.The interaction effect between nitrogen,phosphorus and potassium could affect the yield of‘Pushu 17’.The effect function of the application amount of nitrogen,phosphorus and potassium and the yield of‘Pushu 17’potato was optimized.Maximum fertilization amounts of the highest yield(55646.98 kg/hm^(2))were nitrogen fertilizer 206.88 kg/hm^(2),phosphorus fertilizer 100.37 kg/hm^(2),potassium fertilizer 252.86 kg/hm^(2),and the ratio was 1:0.49:1.22.The best amount of fertilization were nitrogen fertilizer 199.42 kg/hm^(2),phosphorus fertilizer 95.40 kg/hm^(2),potassium fertilizer 238.50 kg/hm^(2),with the ratio was 1:0.48:1.2.The corresponding optimal fresh sweet potato production was 55574.07 kg/hm^(2).