Abstract: 【Objective】The effects of different fertilization methods on maize yield and nitrogen and phosphorus leaching loss in farmland were investigated.【Methods】The three of fertilizing were set up：conventional treatment（CK）,the main factor to optimize treatment（KF）,a comprehensive optimization treatment（BMP）,optimize treatments than conventional treatment 23.63% reduction of nitrogen and 26.55% reduction of phosphorus,including comprehensive optimization treatment as the straw returned;maize grain yield and straw yield,plant biomass,nitrogen and phosphorus uptake,water leaching of nitrogen and phosphorus loss were determined.【Results】There were no significant differences in maize grain yield,straw yield,plant biomass,total nitrogen uptake and total phosphorus uptake among the three fertilization methods（P>0.05）. The annual cumulative loss of total nitrogen and total phosphorus in CK treatment was significantly higher than that in KF treatment and BMP treatment（P<0.05）. Compared with CK,the annual cumulative loss of total nitrogen of KF treatment and BMP treatment was 49.73% and 52.43%,and the annual cumulative loss of total phosphorus of KF treatment and BMP treatment was 38.49% and 59.18%,respectively.【Conclusion】The optimization of fertilization methods could guarantee the yield of maize and reduce the risk of nitrogen and phosphorus leaching loss,and reduce farmland non-point source pollution.

Key words: Optimized fertilization, Maize, Yield, Nitrogen and phosphorus leaching loss