泉州市甘薯“3414”肥效试验

A ‘3414' field test on sweet potato in Quanzhou City

在晋江、南安和惠安等3个县(市)甘薯主栽区开展甘薯"3414"肥效试验,结果表明:土壤基础肥力对当季产量的贡献率为47.1%~88.8%,平均为64.0%;以氮肥增产效果最佳,钾肥次之,氮磷钾施肥效应为N>K>P;试验区域甘薯最佳产量每667m2施肥量为N 0.30~18.65kg、P2O53.00~6.62kg、K2O 13.18~25.84kg,三大元素最佳施肥均值比为N∶P∶K=1∶0.28∶1.23。

A field fertilization experiment of sweet potato was carried out in three main planting area of sweet potato of Jinjiang,Nanan and Huian by using‘3414＇test program.The results showed that the contribution rate of soil basic fertility to quarterly output was 47.1%-88.8% with an average of 64.0%.And the nitrogen fertilizer had the best yield-increasing effect,followed by potassium fertilizer,and the fertilization effect of nitrogen phosphorus and potassium was NKP.The best yield of sweet potatoes in the test area could be obtained while the fertilization amounts per 667 m2 were N 10.30-18.65 kg,P2 O53.00-6.62 kg,and K2 O 13.18-25.84 kg,and the average ratio of optimal fertilization of the three elements is N∶P∶K=1∶0.28∶1.23.