超高产杂交稻的光合特性研究.pdf

中国农业科学 2005,38(2):258-264
Scientia Agricultura Sinica
超高产杂交稻的光合特性研究
刘建丰1,袁隆平2,邓启云2,陈立云1,蔡义东1
(1湖南农业大学水稻研究所,长沙 410128;2国家杂交水稻工程技术研究中心,长沙 410125)

摘要:对 7 个冠层形态性状具有一定差异但又具有较高产量水平的杂交稻组合与对照组合汕优 63 的光合形
态生理特性进行了比较研究。结果表明,比对照显著增产的 4 个组合具有以下光合作用优势:在每穗粒数增加、
库容扩大的基础上,剑叶长度增加、叶角较小,冠层各部光的分布比较均匀(消光系数小); 在孕穗末期、抽穗
后 10 d 和抽穗后 30 d 的光饱和光合速率及抽穗后 10 d 的群体光合速率比对照都有不同程度增加;抽穗前茎鞘中
能积累较多的光合产物并能有效运转至籽粒。
关键词:水稻;超高产;光合作用

A Study on Characteristics of Photosynthesis in
Super High-yielding Hybrid Rice
LIU Jian-feng1,YUAN Long-ping2,DENG Qi-yun2,CHEN Li-yun1,CAI Yi-dong1
(1Agronomy College, Hunan Agricultural University, Changsha 410128;
2China National Hybrid Rice Research & Development Center, Changsha 410125)

Abstract: The morphological features and photosynthetic characteristics of 7 hybrid binations with different canopy
structure and super high-yielding potential were studied parison with Shanyou results showed that binations
having significant increase in grain weight per pared with Shanyou 63 have advantages including (1) a smaller light
extinction coefficient resulted from the more erect leaf blades and longer flag leaves enhanced the capacity of source supply on the
basis of significant increase of sink demand (. spikelets per panicle), (2) a higher rate of canopy photosynthesis during grain filling
and higher rates of flag leaf p