Effect of NPK Combination on Yield and Fertilizer Use Efficiency of Rice

[Objective]The aim was to study the effect of N、P and K fertilizer applyed on the yield and the fertilizer use efficiecy of rice.[Method] The field trial was conducted to investigate the effective tillering and grains of rice and determine rice yield,by setting the regular fertilizer、conventional nitrogen free zone、 conventional phosphorus free zone、conventional no potassium area、formula fertilizer、formula fertilizer without nitrogen、formula fertilizer without phosphorus、formula fertilizer without potassium area and no fertilizer area treatments.[Result] The results showed that the N,P and K formula fertilizer could significantly increase the rice yield.The yield of rice which in formula fertilizer area were significantly higher than those in routine fertilization,while fertilizer utilization rate of rice which in NPK fertilization area increased by 47.8%,23.4% and 10.3% than which in conventional fertilization area.[Conclusion] N,P and K fertilizer application could significantly increase rice yield,at the same time,reasonable control fertilizer applicatin in Hanjiang hilly area of fertilization.