甘薯平衡施用氮磷钾肥料效应研究

Effect of N, P and K Balanced Fertilization on Sweet Potato

研究采用"3414"设计方案,开展甘薯平衡施肥田间试验,建立氮、磷、钾肥料施用量与产量、施肥利润之间的效应函数,结果表明:在本试验条件下,施用N213.6kg/hm2、P2O549.2kg/hm2和K2O223.8kg/hm2时,经济产量最高,达38729.5kg/hm2;施肥利润最佳时的施肥量为N209.1kg/hm2、P2O548.4kg/hm2和K2O190.3kg/hm2,最高利润为55669.4元/hm2。

The effect functions of NPK application on economical yield, fertilization profit of Sweet potato were studied by the field experiment with ' 3414 ' design.The results showed that the best NPK application of Sweet potato with maximum economical yield of 38729.5 kg/hm 2 was N 213.6 kg/hm 2 、 P 2 O 5 49.2 kg/hm 2 and K 2 O 223.8 kg/hm 2 ; the best NPK application with the greatest fertilization profit of 55669.4 yuan/hm 2 was N 209.1 kg/hm 2 、 P 2 O 5 48.4 kg/hm 2 and K 2 O 190.3 kg/hm 2 .