采用裂区设计，探究了不同氮肥运筹方式对有序机抛晚稻生长发育、产量和氮肥利用率的影响。主区为施氮量（N），设3个水平，分别为120 kg/hm²（N1）、150 kg/hm²（N2）和180 kg/hm²（N3）；副区为氮肥分配比例（基肥:分蘖肥:穗肥），设4个水平，分别为1∶1∶1（T1）、0∶1∶1（T2）、1∶0∶1（T3）和1∶1∶0（T4）。以农民习惯施肥为对照（CK，氮肥用量120 kg/hm²，基肥∶分蘖肥∶穗肥=5∶3∶2），另设一不施氮处理（N0）。结果表明，相同施氮量下，T2处理的水稻产量显著低于T1、T3和T4处理及CK，T4处理的产量高于T1处理和CK。表明施用基肥有助于提高有序机抛晚稻的产量。氮肥利用方面，T2处理的氮肥利用率显著低于其他处理；T4处理的氮肥农学利用率（NAE）显著高于T1和T3处理，但与CK差异不显著；T1、T3、T4处理和CK在氮肥偏生产力（NPFP）、氮素籽粒生产效率（NUEg）、氮肥生理利用率(NPE)和氮素收获指数（NHI）等方面差异较小。可见，前期氮肥施用对有序机抛晚稻生长发育、产量形成和氮素利用具有显著调控效应，而后期氮肥施用影响相对较小。

A split plot experimental design was used to explore the effects of different nitrogen fertilizer management methods on the growth and development, yield, and nitrogen fertilizer utilization efficiency of ordered mechanical throwing late rice Jiayouchangjin. The main plot is the nitrogen application rate (N), with three levels set, namely 120 kg/hm² (N1), 150 kg/hm² (N2), and 180 kg/hm² (N3). The sub plot is the distribution ratio of nitrogen fertilizer (base fertilizer: tillering fertilizer: spike fertilizer), with four levels set, namely 1:1:1 (T1), 0:1:1 (T2), 1: 0:1 (T3), and 1:1:0 (T4). Using farmers' habitual fertilization as a control (CK, nitrogen fertilizer dosage of 120 kg/hm2, base fertilizer: tillering fertilizer: ear fertilizer=5:3:2), and another non nitrogen treatment as control 2(N0). The results showed that under the same nitrogen application rate, the rice yield of T2 treatment was significantly lower than that of T1, T3, T4 treatment and CK, the rice yield of T4 treatment was higher than that of T1 treatment and CK. It can be seen that the application of basic fertilizers helps to improve the yield of ordered mechanical throwing late rice. In terms of nitrogen fertilizer utilization, the nitrogen fertilizer utilization rate of T2 treatment was significantly lower than that of other treatments. The differences in nitrogen partial productivity (NPFP), nitrogen grain production efficiency (NUEg), nitrogen physiological utilization efficiency (NPE), and nitrogen harvest index (NHI) among T1, T3, T4 treatments and CK were relatively small. The above results indicated that the application of nitrogen fertilizer in the early stage had a significant regulatory effect on the growth and development, yield formation, and nitrogen utilization of ordered machine thrown late rice, while the effect of nitrogen fertilizer application in the later stage was relatively small.