于水稻的抽穗期、灌浆前期、灌浆后期和蜡熟期测定了剑叶和剑叶下第一叶的单叶净光合率,并与收获后的籽粒产量进行相关分析,结果是:灌浆后期呈显著正相关,其余各期不相关或正相关但不显著。 The net photosynthetic rate of single leaf in the first leaf under the flag leaf and the flag leaf was determined at the heading stage, the early filling stage, the late filling stage and the wax ripening stage, and the correlation analysis was carried out with the grain yield after harvesting. The result was: Significantly positive correlation, the rest of the period is not related or positive correlation but not significant.