Abstract: A field experiment was carried out to explore the effects of bud fertilizer on agronomic traits and yield formation of ratoon rice, using Huanghuazhan as material, urea as nitrogen fertilizer. The results showed that: in the application of the same seedling fertilizer （urea 225 kg/hm2） conditions, with the increase of the amount of bud fertilizer, the yield, plant height, ear length, spike rate and final regeneration rate of Huanghuazhan were increased in the regeneration season, and the grains per panicle and seed setting rate were increased first and then decreased, but 1 000-grain weight had no obvious change. There were significant positive correlation between the amount of bud fertilizer and the yield and effective panicles of Ratoon rice. When bud fertilizer is 300 kg/hm2, the yield of ratoon rice was the highest（4 633.8 kg/hm2）, and increased by 22.69% compared with no bud fertilizer treatment.

Key words: ratoon rice, bud fertilizer, correlation, agronomic characteristics, yield.

摘要： 为探讨促芽肥对再生稻再生季农艺性状和产量形成的影响，以黄华占为试验材料，尿素作为氮肥进行小区试验。结果表明，在施等量发苗肥（尿素225 kg/hm2）的情况下，随促芽肥施用量（尿素0、75、150、225、300 kg/hm2）的增加，黄华占再生季的产量、株高、穗长、成穗率和最终再生率增加，每穗粒数和结实率先增后减，千粒重无明显变化；促芽肥用量与再生季产量、单位面积穗数呈显著正相关，促芽肥用量为300 kg/hm2时，黄华占再生季产量最高，为4 633.8 kg/hm2，比不施促芽肥的处理增产22.69%，达极显著水平。

关键词: 再生稻, 促芽肥, 相关性, 农艺性状, 产量