三个C两优杂交稻组合的株型及干物质生产特性

 以汕优63为对照，对3个C两优杂交稻组合的株型及干物质生产特性进行了研究。与汕优63相比，C两优杂交稻组合上3叶叶型较狭长，叶片着生角度小，总叶面积较大；齐穗期上3叶净光合速率和叶绿素含量较高，根系活力较强；基部节间较粗、较短，茎秆的抗倒性强, 中部节间较长,穗下节间占总秆长的42.77%；抽穗后干物质积累速率快，增量大，且茎鞘叶中的干物质向籽粒运转量多，对籽粒的贡献率高。C两优杂交稻抽穗后茎叶干物质输出量和干物质积累量与稻谷产量分别呈显著和极显著正相关。C两优杂交稻组合较理想的株型和中后期强大的干物质生产和转运优势是其高产的重要原因。

Plant Type and Dry Matter Production Characteristics of C Liangyou Hybrid Rice Combinations

The plant type and dry matter production characteristics were studied by using three C Liangyou hybrid rice combinations as materials and Shanyou 63 as a control.Comparing to Shanyou 63,the C Liangyou hybrid rice combinations showed narrower and longer uppermost three leaves,narrower leaf angles and larger total leaf area;maintained stronger root vigor and higher net photosynthetic rate and contents of chlorophyll at the full heading stage;had shorter and wider base internodes and stronger lodging resistanc...