摘要
以本地表现最好的三系杂交稻Ⅱ优 5 8和两系杂交稻两优培九为材料 ,比较研究了两组合后期叶片叶绿素含量与功能随时间发生的变化、剑叶在后期不同阶段光合速率的变化及后期干物质的转运与分配。结果表明 :两系杂交稻后期虽具有叶绿素功能期较长和光合速率较稳定等优势 ,但在中肥条件下 ,仍表现库大源小 ,干物质转运欠畅 ,源库流关系欠协调 ,因而结实率较低 ,谷粒充实度较低 ,限制了其增产潜力的发挥。两系杂交稻的超高产栽培 。
The difference of photosynthetic characteristics between two line hybrid rice Liangyou Peijiu and three line hybrid rice Ⅱ You 58 was compared after heading stage. The results showed that compared with Ⅱ You 58, Liangyou Peijiu had a longer functional period of photosynthesis and the photosynthetic rate decreased more slowly in flag leaf. Even so, under middle fertility conditions, its source sink relation could not be well coordinated for its relatively smaller source but larger sink, and its dry matter could not be transferred to spikelets normally, which results in a lower seed setting rate and a poorer grain filling in Liangyou Peijiu than in Ⅱ You 58, thus limiting the high yielding potential of Liangyou Peijiu. To achieve a super high yield of two line hybrid rice Liangyou Peijiu, fertile soil is a must in its cultivation.
出处
《杂交水稻》
CSCD
北大核心
2001年第1期51-54,共4页
Hybrid Rice
关键词
两系杂交稻
三系杂交稻
生育后期
光合生产特性
two line hybrid rice
three line hybrid rice
photosynthetic characteristics
