Effects of Different Combination Ratios of N,P Fertilizer on Nutrient Uptake of Maize and Yield

【Objective】The purpose of this project is to study the effects of different rates of N,P fertilization on nutrient uptake of maize and the yields under field trial.【Method】Through the different rate of N,P fertilization experiment,to study the relationship between fertilizer rate and the dry matter accumulation,the nutrient uptake,as well as the yields of corn. 【Result】The results showed that the N,P maximum absorption of spring corn was appeared in the filling stage,and the N and P uptake proportion were 43. 2% and 44. 2%.The nutrients uptake of jointing stage and silking stage increased along as nitrogen or phosphorus fertilizer increased,and the N∶ P2O5 was from 1∶ 0. 16 in the jointing stage reduced to 1∶ 0. 84 in the milking stage.【Conclusion】The dry matter accumulation and corn yield were increased significantly as the N,P fertilizer increased,and the treatment of high nitrogen increased more significantly increased with the growth of maize,During the same period,the inereasing amount of nitrogen and phosphate increased could increase dry matter accumulation quantity significantly. The nutrient absorption of N,P2O5 and K2O were 2. 92 kg,1. 02 kg,and0. 13 kg of 100 kilogram grain,and the nutrient absorbed ratio was 1∶ 0. 35∶ 0. 04. The treatment N300P150 is the optimum to the nutrient uptake and yield of maize in the study area.