Effect of "3414" Fertilization Experiment and Fertilizer Recommendation on Mid-season Rice

This paper studied the effects of nitrogen,phosphorus and potassium fertilization on mid-season rice by the 3414 fertilizer experiment,which was conducted in Chibi city,Hubei province.The result showed that the effect of N fertilization on mid-season rice yield and economic benefit was largest,the next was K,and P fertilization was the smallest.The highest in-crement of N,P and K were 2 325,400 and 777 kg.hm-2,and which were 39.1%,5.1% and 10.4% higher than control,re-spectively.The net income of N,P and K were 2 737.5,288.8 and 678.5 yuan.hm-2,respectively.According to the model of fertilizer effect,the highest yield will be reached when N,P2O5 and K2O application rate are 169.8,84.5 and 163.7 kg.hm-2,and the highest profit will be reached when N,P2O5 and K2O application rate are 153.7,61.5 and 120.8 kg.hm-2,respectively.