Effect of balanced fertilization on the yield,nutrients absorption and accumulation of summer maize

At present,the fertilization of summer maize has many disadvantages,a field experiment was carried out to study the effect of different fertilization treatments on the yield,apparent N recovery,nutrients absorption and accumulation of summer maize.The objective of this experiment was to find the rule of nutrients absorption and transformation,and to give a scientific suggestion for the high-yield fertilization.The results showed that balanced fertilization(NPK) could increase grain yield significantly,the yield reached 6426 kg/hm2,and improved 13.2%、12.9%、19.3%、12.0%、22.9% compared with PK、NK、NP、FP、CK,respectively.The curve of biomass accumulation was the same as the curve of nutrients accumulation,assuming the shape of S.The order of nutrients accumulation was NKP,the chief stage of accumulation of biomass and nutrients was from large bell to filling stage,so fertilization in large bell was very important.