Abstract: In order to solve the problems of unscientific nitrogen management,low nitrogen use efficiency and pollution of ecological environment in maize production in Heilongjiang Province,the combined application experiment of slow and controlled-release fertilizer under the reduction of base fertilizer was carried out in the plot with straw returning to study the effects of different fertilization treatments on maize yield,nitrogen accumulation,nitrogen transport and nitrogen partial productivity.The results showed that compared with conventional fertilization,under the condition that the base fertilizer reduced the amount of nitrogen application,and the topdressing period and topdressing amount of nitrogen were the same,the combined application of slow and controlled-release urea was beneficial to improve the nitrogen accumulation of per plant and population,the nitrogen transport capacity and efficiency of vegetative organs,the contribution rate of nitrogen transport to grain,and finally improve the yield and nitrogen partial productivity.Under the condition of applying11.3kg·ha-1 nitrogen fertilizer as base fertilizer and 30%∶70% ratio of resin coated urea to ordinary urea,the amount of nitrogen application could be saved by 16%,the maize yield could be increased by 5.20%,and the partial productivity of nitrogen fertilizer could be increased by 22.88%.