水稻灌浆期群体光能截获与利用分析

对直立穗型和弯曲穗型水稻品种灌浆期群体光能截获与利用情况测定分析的结果表明:不同穗型水稻群体的光截获在南北行向上存在明显差异,东西行向差异不显著;直立穗型南北行向群体光垂直递减率明显小于弯曲穗型,但漏光损失较多;各群体的冠层光反射均随水稻生育期的发展而增大,品种之间差异明显;各群体的地表漏射在行向间差异明显,品种间差异不大。

Utilization and Interception of Light on Rice Population During Filling Stage

The utilization and interception of light on different rice panicle type variety populations during their filling stages were measured and analyzed.The results showed that there was significant difference in N-S row direction for rice populations of different panicle type varieties in light interception,while there was not significant difference in EW row direction.There was significant difference in light interception for different row directions of erect panicle type,while the curved panicle type was no different.Light reflection of canopy in all populations increased with the development of growth stages,and there was a difference between the erect panicle type and the curved panicle type varieties.Light penetration of soil surface was very similar between the erect panicle type and the curved panicle type varieties,but it was different between N-S and E-W row directions.