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【目的】研究不同氮肥施用量对优质稻百优838生理特性和生长发育特点的影响,为百优838以及同类优质稻品种的栽培调控和群体控制提供理论依据。【方法】采用随机区组设计,设6个不同氮肥施用量(0、90、150、210、270、330kg/haN)处理,调查百优838生长期间茎蘖穗的生长动态变化及产量。【结果】百优838在低氮施肥水平下即可建立良好的群体结构、获得较高净物质含量和产量,90kg/haN处理下百优838的产量最高,为8390.4kg/ha,其对茎蘖数动态控制及最终的净物质含量最有利;330kg/haN处理产量最低。【结论】百优838对氮肥施用量较为敏感,最佳施氮量为90kg/haN。
【Objective】 The objective of this study was to investigate the effects of different nitrogen rates on physiological characteristics and growth and development characteristics of high yielding rice Baiyou 838, providing a theoretical basis for the cultivation and population control of Baiyou 838 and other high quality rice cultivars. 【Method】 A total of 6 different N application rates (0, 90, 150, 210, 270, 330 kg / ha) were used to investigate the dynamic changes of stem tillering spike and its yield during the growth of Baiyou 838. 【Result】 Baiyou 838 was able to establish a good population structure under low N fertilizer application with high net content and yield. The yield of Baiyou 838 was highest at 83kg / haN, which was 8390.4kg / ha. The dynamic control of tiller number and net final content were the most favorable. The output of 330 kg / haN was the lowest. 【Conclusion】 Baiyou 838 was more sensitive to nitrogen application rate and the optimum nitrogen application rate was 90kg / haN.