论文部分内容阅读
以第1,2,3期超级杂交稻代表品种两优培九、Y两优1号、Y两优2号为材料、以高产三系杂交稻汕优63为对照,对冠层形态结构、干物质积累与转运和产量性状进行了研究。结果表明:与对照汕优63相比,超级杂交稻的比叶重、卷叶指数较大,叶基角、披垂角较小,表现为上3叶直立、厚、卷,基部透光率较高;总干物质积累量及抽穗后干物质积累量、茎鞘物质输出率较高,群体总颖花量、每穗总粒数和结实率也显著高于对照,且随不同时期超级杂交稻产量水平的提高,群体总颖花量、抽穗后及总干物质积累量依次提高。在“源”足、“流”畅的支撑下,不断提高“库”容量是进一步提高超级杂交稻产量水平的重要途径。
The hybrid rice Liangyougyou 9, Y Liangyou 1 and Y Liangyou 2, which are the first, second and third phases of super hybrid rice, were used as control materials. The high-yielding three-line hybrid rice Shanyou 63 was used as control. The morphological structure, dry matter accumulation Transport and yield traits were studied. The results showed that the super hybrid rice had larger specific leaf weight, larger leaf index and smaller leaf base angle and phi than the control Shanyou 63, which showed the upright, thick, curly, basal transmittance Higher total dry matter accumulation and post-heading dry matter accumulation, higher stem and sheath material output, total population spikelets, total grains per panicle and seed setting rate were significantly higher than those of the control, and with the super hybridization at different stages The increase of rice yield, total population of spikelets, heading and total dry matter accumulation increased in turn. Under the support of “source” and “flow”, the continuous improvement of the “” “” capacity is an important way to further improve the yield of super hybrid rice.