Abstract: Using japonica variety XiuShui 128,field experiments were carried out to investigate the effects of sulfur-polyester resin-coated urea(SPCU)and polyester resin-coated urea(PCU)on rice grain yield and nitrogen use efficiency(NUE). The results showed that:(1)compared to PU 70%(prilled urea)with N content at 147 kg·hm^-2,the rice grain yields significantly increased by 5.26% with a single basal application of SPCU 70% under the same N rate which were 8 022.5 kg·hm^-2,and the NUE were 49.32% which significantly increased by 38.42%；(2)compared to PU 100% with N content at 210 kg·hm^-2,the rice grain yield showed no significant difference but the NUE significantly increased by 33.69% with a single basal application of SPCU 70%；(3)there was no significant difference between rice grain yields of SPCU and PCU; however, NUE of SPCU significantly increased compared to that of PCU．

Key words: controlled-release coated urea, grain yield, nitrogen use efficiency, rice