【摘要】 【目的】为探索不同库容类型遗传群体水稻氮素吸收和利用的差异。【方法】在大田条件下,以染色体单片段代换系水稻群体114个株系为供试材料,采用聚类分析将供试株系群体库容量分为6种类型。【结果】（1）供试群体库容量变幅为676.80～1326.43 g·m^-2,产量变幅为311.74～763.35 kg·666.7m^-2,两者差异均较大。大库容量水稻具有高产的显著特征;（2）大库容类型水稻成熟期吸氮量优势显著,但其利用三指标均较小;（3）通径分析与相关分析均表明,成熟期吸氮量与氮素籽粒生产效率均对库容量的形成有显著的促进作用,且前者大于后者;（4）大库容量水稻抽穗期和灌浆结实期吸氮量均高于其它水稻;（5）大库容量水稻全生育期较小,但吸氮强度显著高于其它类型水稻;（6）大库容量水稻单位面积穗数、单茎吸氮量均具有显著的优势。【结论】大库容量水稻库容量和产量优势明显,这主要得益于其较高的吸氮量和吸氮强度,灌浆结实期尤为明显。更多还原

【Abstract】 【Objective】In order to reveal the features of nitrogen uptake and utilization in rice genetic populations with different sink capacity type. 【Method】A total of 114 chromosome single segment substitution lines（CSSSLs） were analyzed in two consecutive years under field condition, and subcategorized into 6 types, according to their sink size by MinSSw（Minimum Square Sum within Groups） method. 【Results】（i） The sink capacity ranged from 11.53-27.66 g·m^-2, and the yield ranged from 311.74-763.35 kg·666.7 m^-2. Along with increase in the sink capacity, the yield improved;（ii）The N uptake in the large sink capacity type lines was more than that in other types at the maturity stage, but the N use efficiency for grain yield, N use efficiency for dry matter production and the N harvest in the large sink capacity type were the least;（iii） The path analysis and correlation analysis suggested that the N uptake and N use efficiency for grain output at maturity stage had a positive effect on the formation of sink capacity, and the former one was larger than the latter one;（iv） The N uptake in the large sink capacity type were mora than in other types at heading stage and grain-filling stage;（v） The growth duration in the in the large sink capacity type was lesser, but the N uptake intensity was larger than the other types;（vi） The panicle number per unit area in the large sink capacity type had a distinct advantage, as well as the N uptake per panicle. 【Conclusion】The sink capacity and yield in the high sink capacity type were more than in other types, it was mainly due to its high nitrogen absorption and nitrogen absorption intensity, especially during the grain-filling stage.更多还原