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.