Study on Effect of the "3414" Fertilizer Amount and Recommended Fertilization Amount on Late-season Rice with High Yield

[Objective] The research aimed to study the effect of nitrogen,phosphorus and potassium fertilization on the yield and economic benefits of late-season rice.[Method] The influences of the application amount of N,P and K fertilizer on rice were studied by the 3414 fertilizer experiment.[Result] The results showed that the fertility efficiency was the remarkably different between the soil of high fertility and other areas.When adequate N,P and K were supplied,the yield and economic benefits could be significantly improved,otherwise would decrease the economic benefits or to worse.According to fertilizer effect function,the highest yield would be reached when N,P2O5 and K2O application rate were 249.9,62.2 and 128.7 kg/hm2 resp.,and the highest profit would be reached when N,P2O5 and K2O application rate were 189.2 kg/hm2,55.2 kg/hm2 and 101.1 kg/hm2,respectively.[Conclusion] The reasonable application of N,P and K fertilizer was the effective measure for increasing the rice yield.