对福建杂交早稻金优2155和T78优2155进行施氮量试验,结果显示,两品种各器官的含氮量随着植株生长发育进程而逐渐降低;移栽后,两品种各生育期各器官的含氮量、氮素积累量、籽粒中氮素来自营养体转运量随施氮量的增加而增加;T78优2155氮素积累量和灌浆期间籽粒的氮素吸收更依赖于营养体;两品种的氮收获指数、土壤氮贡献率在不同氮肥处理间差异不显著,两品种的氮收获生理效率随施氮量的增加而减少,而两品种的氮肥利用率随施氮量的增加表现出不同的变化趋势。 The results showed that the nitrogen content of different organs of two cultivars decreased gradually with the process of plant growth and development. After transplanting, the content of nitrogen in different organs of two cultivars Nitrogen content and nitrogen accumulation, nitrogen transport from kernels increased with the increase of nitrogen application rate. Nitrogen accumulation of T78you 2155 and grain filling were more dependent on vegetative organs. , The contribution rate of soil nitrogen to different nitrogenous fertilizer treatments had no significant difference. The nitrogen harvest physiological efficiency decreased with the increase of nitrogen application rate, while the nitrogen use efficiency of two cultivars showed different with the increase of nitrogen application rate The trend of change.