The response of rice to nitrogen (N) was compared between three rice cultivars and three N treatments: 1:0, 0:1, and 1:1 NH₄⁺:NO₃⁻. The three rice cultivars used were: Shennong1401 (SN1401, erect panicle rice cultivar) and Habataki and Sasanishiki (curved panicle rice cultivars). At the booting stage, higher gene expression and enzyme activity associated with N metabolism of rice in the including-NO₃⁻ solutions effected the secondary assimilation of N metabolism, and ultimately increased grain development. During the tillering stage, lower NO₃⁻ uptake rates and glutamine synthetase and NADH-dependent glutamate synthase activity in Habataki and Sasanishiki under the NO₃⁻ treatments resulted in lower effective panicle number per plant. However, no significant differences were observed in the grain yield per plant of SN1401 between NH₄⁺ and NO₃⁻ treatments. Our results indicate that the erect panicle rice cultivar can grow better under the including-NO₃⁻ treatment.

1：0，0：1和1：1的NH水稻对氮的反应（N）中的溶液3个水稻和三个N处理之间进行比较₄ ⁺ NO：₃ ^- 。使用的三种水稻品种为：神农1401（SN1401，直立穗型水稻品种）和Habataki和Sasanishiki（弯曲穗型水稻品种）。在孕穗期，更高的基因表达，并与在包括-NO大米的氮代谢相关的酶的活性₃ ^-溶液进行氮代谢的二次吸收，并最终增加的晶粒的发展。在分蘖期，降低NO ₃ ^-摄取速率和谷氨酰胺合成酶和NO下哈巴达克和笹锦NADH依赖性谷氨酸合酶活性₃⁻处理导致每株植物的有效穗数较低。然而，在每NH之间SN1401的植物的谷粒产量没有观察到差异显著₄ ⁺和NO ₃ ^-的治疗方法。我们的研究结果表明，直立穗型水稻品种都下包括-NO更好地成长₃ ^-治疗。