CAJ | 학술논문

【目的】研究结实期不同施氮量对寒地水稻群体源库关系及产量的影响，为结实期合理施氮提供理论依据。【方法】采用随机区组设计，研究结实期5个施氮水平对空育131群体源库关系及产量的影响。【结果】施氮22．5～67．5 kg/hm2对空育131的叶面积指数、库容量、平方米穗数、穗粒数、千粒重、产量及整精米产量均有一定的促进作用，存在最适值；施氮67．5 kg/hm2时稻谷产量及整精米产量分别达到13581 kg/hm2、8914 kg/hm2，与对照差异均达到极显著水平。【结论】在寒地条件下，施氮67．5 kg/hm2对空育131的增产及其他指标的综合提高效果明显，结实期适量施氮可以提高群体稻谷产量和整精米产量。
【목적】연구결실기불동시담량대한지수도군체원고관계급산량적영향，위결실기합리시담제공이론의거。【방법】채용수궤구조설계，연구결실기5개시담수평대공육131군체원고관계급산량적영향。【결과】시담22．5～67．5 kg/hm2대공육131적협면적지수、고용량、평방미수수、수립수、천립중、산량급정정미산량균유일정적촉진작용，존재최괄치；시담67．5 kg/hm2시도곡산량급정정미산량분별체도13581 kg/hm2、8914 kg/hm2，여대조차이균체도겁현저수평。【결론】재한지조건하，시담67．5 kg/hm2대공육131적증산급기타지표적종합제고효과명현，결실기괄량시담가이제고군체도곡산량화정정미산량。
Obj ective]The aim of this study was to explore the effects of nitrogen fertilizer during the productive phase on source-sink relationship and yield of rice population in the cold region. The results may provide a theoretical basis for reasonable application of nitrogen fertilizer.[Method]Randomized block design was used to investigate the effects of 5 nitrogen addition lev-els during the productive phase on source-sink relationship and yield of Kongyu 131 population.[Results]Nitrogen application (22. 5-67. 5 kg/hm2 )had positive effects on leaf area index,stor-age capacity,spikes grains of per square meter,grain number per spike,1 000-grain weight,yield and head rice of Kongyu 1 3 1 .When nitrogen application was 6 7. 5 kg/hm2 ,the grain yield and head rice were 13 581 kg/hm2 and 8 914 kg/hm2 ,respectively.They were significantly higher than those of the control.[Conclusion]In the cold region,when nitrogen application was 67. 5 kg/hm2 ,the yield and other indicators of Kongyu 131 were enhanced obviously.Nitrogen fertilizer during the productive phase may increase the yield of rice in groups and head rice.