Using 5 wide suitability varieties as material in four typical ecological rice areas，effect of different nitrogen fertilizer on yield，and nitrogen use efficiency in different rice areas.The results showed that the rice yield was increased significantly by nitrogen fertilization in different rice areas，the increase rate of production by nitrogen application was in order of warm japonica area>cold japonica area>indica and japonica crisscross area>cool japonica area.The increased yield in cold japonica area were mainly caused by effective panicles and 1 000 grain weight，but those in other three ecological rice areas were mainlyincreased by effective panicles and grain number per panicle.The nitrogen fertilizer requirements of producing the same amount of rice were in order of cold japonica area>cool japonica area>warm japonica area>indica and japonica crisscross area.Agronomic efficiency of nitrogen was in order of warm japonica area>indica and japonica crisscross area>cool japonica areas>cold japonica area.Nitrogen absorption rate was in order of indica and japonica crisscross area>warm japonica area>cool japonica area>cold japonica area.The soil nitrogen contribution rate was 61.10%~66.09% in the four rice areas.It was concluded that the absorption of nitrogen in the rice area was derived mainly from soil，maintaining on a high level of soil fertility was great significance to the yield and nitrogen efficiency.