Abstract: By comparing rice variety Yuexiangzhan, a high harvest index variety with Qishanzhan, Jingxian 89, the mainly varieties cultivated in Guangdong Province, the sink, source and flow characteristics of rice variety Yuexiangzhan was studied.The results showed that Yuexiangzhan had higher sink, filling sink ability, and ratio of grains to leaf area, stronger photosynthetic ability during growing stage, especially from heading to yellow ripening compared with Qishanzhan and Jingxian 89. The source and the sink was coordinated in Yuexiangzhan. More photosynthate was translated to grains after flowering, and the flow was unimpeded between the sink and the source. The main reason of Yuexiangzhan forming high harvest index and high yield was due to balance and coordination of sink, source and flow.

Key words: rice, harvest index, physiological trait, source sink relationship, flow

摘要： 以广东省主栽水稻品种七山占、粳籼89为对照，采用对比分析的方法，研究了高收获指数型优质水稻品种粤香占库、源、流特性。结果表明，粤香占的库容较大，填库能力较强；全生育期叶片的光合作用能力，尤其是抽穗至黄熟期的光合作用能力强，粒叶比高；花后光合产物用于籽粒充实的比例大，库源间流的通畅性好。库、源、流在较高水平上协调平衡是粤香占高收获指数高产的主要成因。

关键词: 水稻, 收获指数, 生理特性, 源库关系, 流