Effect of Formula Fertilization on Rice Yield in Jiangshan City

[Objective]The paper was to determine the best fertilization ratio of nitrogen,phosphorus and potassium in rice cultivation in Jiangshan City,so as to provide scientific basis for rice formula fertilization.[Method]With Eryoupei 9 as test variety,4 levels and 18 combinations of nitrogen,phosphorus and potassium fertilizer were set in the test respectively,and the effect of various treatments on rice yield factors and yield was detected.[Result]The combination treatment with nitrogen fertilizer of 180.0 kg/hm2 had the highest average yield,and phosphorus had less obvious effect on yield than nitrogen.The higher the potassium application amount was,the higher the yield was.The combination treatment with the highest yield was nitrogen(N) 180.0 kg/hm2,phosphorus(P2O5) 90.0 kg/hm2 and potassium(K2O) 225.0 kg/hm2,and the yield was 9 271.5 kg/hm2.[Conclusion]Combining the productive practice in local place,the recommended amount of optimal fertilization formula is as follows: nitrogen(N) 180.0 kg/hm2,phosphorus(P2O5) 52.5-90.0 kg/hm2 and potassium(K2O) 225.0 kg/hm2.