【摘要】 不同栽插密度及氮、磷、钾不同施肥水平对甘薯品种苏渝 30 3产量等性状的影响研究表明 ,各因素对鲜薯产量的影响作用依次为钾 >氮 >磷。进一步的逐步回归分析表明氮、磷、钾的作用达显著水平 ,密度的作用不明显。在本试验的处理水平内 ,苏渝 30 3获得最高产量时 ,氮、磷、钾的最适施肥量分别为N 30 0kg·hm- 2 ,P2 O51 93 5kg·hm- 2 ,K2 O 367 5kg·hm- 2 。更多还原

【Abstract】 The result by studying on the effects of different plant density and fertilization level of N, P and K on sweet potato Suyu 303 indicates that the effects on the root yield are K>N>P in turn. Regression analysis indicates that the effects of N, P and K are significant rather than the density. To obtain the highest root yield of Suyu 303, the quantity of N, P and K in the optimal fertilization is N 20 kg/667 m 2, P 2O 5 12 9 kg/667 m 2, K 2O 24 5 kg/667 m 2 separately in this experiment.更多还原