甘薯平衡施肥技术研究

摘要

[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 the 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 nitrogen.