甘薯平衡施肥技术研究

Study on Balanced Fertilization of Sweet potato

[目的]研究不同肥料配比对甘薯产量的影响,为甘薯平衡施肥提供依据。[方法]以徐薯22为材料,以不施肥为对照,研究不同肥料配比对徐薯22地上部、地下部及产量的影响。[结果]P、K是徐薯22增产的关键,NPK、PK和习惯施肥这3个有P、K搭配的处理徐薯22的鲜薯产量均出现一定幅度的增产,其中以PK处理徐薯22的鲜薯产量最高,增产16.03%;NPK处理徐薯22鲜薯产量增产次之,为7.04%;NP处理徐薯22的地上部出现旺长。[结论]在中等肥力土壤条件下,甘薯要高产,应注意磷钾肥的搭配,不施或少施氮肥。

[ Objective ] To study the influence of different fertilizer ratio on sweet potato yield, and provide reference for balanced fertilization of sweet potato. [ Method] With Xushu 22 as material, non-fertilizer as control, effects of different fertilizer ratio on the growth of aboveground parts, underground parts and the yield were studied. [ Result ] The results showed that phosphorus （P） and potassium （K） are key fertilizers for the yield of Xushu 22. And in all processing with P and K, such as N ＋ P ＋ K, P ＋ K and the compound fertilizer, the fresh base yield of Xushu 22 was raised at a certain level. With the treatment of P ＋ K, Xushu 22 had the highest fresh base yield. And/he yield increased at a significant level, which was 16.03%. The N ＋ P ＋ K treatment followed by 7.04%, while with the N ＋ P treatment, the aboveground parts had excessive growth. [ Conclusion ] Under the medium fertility soil conditions,in order to have high sweet potato yield, we should pay attention to the mix of P and K. and fertilize no or less nitrozen.