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[目的]研究不同氮肥施用量对超级稻桂两优2号生理特性和生长发育特点的影响。[方法]采取随机区组试验设计,开展6个相同密度不同氮肥施用量的研究,调查生长期间茎蘖穗的生长动态以及产量变化。[结果]120 kg/hm2氮肥处理超级稻桂两2号群体结构好,产量最高;300 kg/hm2氮肥处理群体结构差,产量最低。[结论]通过不同氮肥施用量的研究,为超级稻桂两2号及同类超级稻提供适宜氮肥施用量的参考。
[Objective] The research aimed to study the effects of different nitrogen fertilizer rates on the physiological characteristics and growth and development of super rice Guiliangyou 2. [Method] A randomized block experiment design was carried out to study the application of six nitrogen fertilizers with the same density and different density. The growth dynamics of tiller and spike and the change of yield during the growing period were investigated. [Result] The results showed that the structure of super rice Gui Lian No.22 was the best under the nitrogenous fertilizer treatment of 120 kg / hm2, with the highest yield. The nitrogenous fertilizer treatment group with 300 kg / hm2 had poor structure and the lowest yield. [Conclusion] Through the research of different nitrogen application rate, the reference of the suitable N application rate for Super Rice Gui Lian 2 and its similar super rice was provided.