杂交稻的物质生产与产量优势的形成

The Dry Matter Production and Yield Superiority Forming of Hybrid Rice

利用计算机模拟手段，分析比较２个杂交组合及其共同父本的干物质积累、分配和产量形成特性．结果表明：杂交组合的干物质生产能力比其父本强，各器官干物质分配在生育后期差异较明显；籽粒产量的高低主要取决于后期群体光合产物向穗部的分配．杂交组合后期生理活性较强以及新生产的干物质较多是形成产量优势的主要原因．

Two hybrids and the same male parent of them were used for the experiment.The characters of dry matter accumulation and distribution and yield superiority were analysed by means of computer simulation·The results revealed that the ability of dry matter production of the hybrids was higher than that of the male parent, and,the,difference of dry matter distribution of the organs was significant during later period, the yield was mainly depended on the part of the population photosynthesis sended to the eat of grain in later stage.The main reason of the hybrids'yield superiority was that hybirds had a strength of physiological activity and produced more dry matter than their parent did in mature period.