库容／有效群体指数与水稻的源库关系及不同部位籽粒的灌浆结实特性

本文研究了赣化７号、Ｗ６１５４ｓ／早特青（简称Ｗ／早）、汕优６３的源库特征及类型，以及不同部位籽粒的灌浆结实特性。结果表明，库容／有效群体指数较好地反映了源库相互依存的关系以及其作为判断源库关系的指标是适宜的。另外．水稻结实率的差异主要表现在中部及下部二次枝梗籽粒（弱势粒），以弱势粒结实率作为判断源库关系的指标能大大提高灵敏度。

Sink Capacity/Effective Population Inded,Source Sink Relationship,and Setting Percentage of Kernels Different Parts of Rice

The sink source relationship and setting characteristics of kernels in different parts of rice were srudied Results were summarized as follows:Firstly, the ratio of sink capacity to effective population index has cluse correlation with sink source relationship.So it can be taken as an index forregulation of sink source relationship in rice cultivation, Secondly,the difference in setting percentage appears to be mainly attributed to middle and lower secondary branches kernels.The setting percentage of kernels in middle and lower secondary branches can be used to characterize sink source relation with higher sensitivity.