Effects of different nitrogen application（N 0 and 2025 kg/hm2） on rice yield，quality and nitrogen absorption were studied using three rice cultivars，Tianyou huazhan and their parents（Huazhan and Tianfeng），in a field experiment.The results showed that:nitrogen fertilizer could raise Tianyou huazhan and their parents yield and the reason was effective panicles increased，the reason of Tianyou huazhan yield higher than the other two varieties was effective panicle number and grain weight higher；The application of nitrogen fertilizer could increase dry matter accumulation of Tianyou huazhan and its parents；under the same treatment，stem sheath dry matter output rate and contribution rate of Tianyou huazhan was the biggest；nitrogen fertilizer could increase Tianyou huazhan and parents rice grain length and protein content，decrease chalky grain rate；When harvest different parts of nitrogen accumulation in all varieties positively corrected with nitrogen fertilization，and nitrogen accumulation in different organs of Tianyou huazhan was significantly higher than that of Huazhan and Tianfeng.