为了科学合理地施用氮肥，实现化肥减量增效的目的，本试验研究了氮肥用量对浙北地区不同类型晚粳品种产量形成的影响。结果表明，在本试验范围内，不同类型晚粳品种的耐氮肥性表现为弯穗型晚粳稻（嘉禾218）＞籼粳型杂交晚粳稻（甬优538）＞直立穗型晚粳稻（秀水134、秀水121）＞半直立穗型晚粳（糯）稻（甬糯34）；浙北地区单季晚粳稻产量构成因子主要由品种本身决定；直立穗型和半直立穗型晚粳及籼粳杂交稻可以适当减少氮肥施用量，氮肥用量以折合尿素30 kg/667 m2为宜。

In order to apply nitrogen fertilizer reasonably and achieve the purpose of reducing the amount of fertilizer and increasing the efficiency of fertilizer, an experiment was conducted to study the effects of nitrogen fertilizer amount on the yield of different types late japonica rice in the northern Zhejiang. The results showed that the nitrogen tolerance traits of different types of late japonica rice were as follows: bending head late japonica variety Jiahe 218＞ indica-japonica hybrid variety Yongyou 538＞erect panicle late japonica variety Xiushui 134, Xiushui121＞semi-erect panicle late japonica variety Yongnuo 34. The yield components of late japonica rice in the northern Zhejiang are mainly determined by varieties and have little relationship to the amount of nitrogen fertilizer. The amount of nitrogen fertilizer could be reduced appropriately in indica-japonica hybrid rice varieties, erect and semi-erect panicle late japonica rice varieties, and suitable urea is 30 kg/667 m2.