Effect of Fertilization of Nitrogen,Phosphorus and Potassium on Corn Yield

[Objective] The paper was to explore the basic parameters such as soil nutrient supply capacity,nutrient uptake of single corn and utilization rate of fertilizer to establish fertilizer effect function of single corn,and find out the optimum fertilization and formula of nitrogen,phosphorus and potassium.[Method] With nitrogen fertilizer,phosphorus fertilizer and potassium fertilizer as variable factors,the orthogonal experiment with 3 factors and 4 levels was designed.The basic parameters such as nutrient uptake of single corn and utilization rate of fertilizer are analyzed,and the optimum fertilization and formula of nitrogen,phosphorus and potassium were explored.[Result] The fertilizer demands of corn successively were nitrogen,potassium,phosphorus.Therefore,nitrogen fertilizer should be increasingly applied in corn production,with coordinated phosphorus and potassium fertilizer.The fertilization for highest corn yield was as follows:N 330 kg/hm2,P2O5 180 kg/hm2,K2O 90 kg/hm2.When N∶P2O5∶K2O was 1.00∶0.54∶0.27,the corn yield was the highest as 12.6 t/hm2.[Conclusion] The study provided reference for fertilizer formula and recommended fertilization of corn production.