不同穗型水稻生育后期群体光合有效辐射的分布状况

Distribution of Photosynthetic Active Radiation in Different Panicle Type Rice Communities during Later Growth Stage

在灌浆期对2个不同穗型的水稻品种,在不同行向群体光合有效辐射分布和截获情况进行了测定分析。结果表明:不同穗型品种在东西行向上,光截获和分布差异不大,在南北行向上差异明显。在不同行向直立穗型品种差异明显,弯曲穗型品种差异不大。水稻不同生育时期内,群体光合有效辐射的截获量及截获率不同。

Photosynthetic active radiation (PAR) distribution and interception of different rice variety communities in different row directions were measured during the whole filling stage. The results showed as follows: There are significant differences in N-S direction of different variety communities in PAR distribution and interception, while there is similarity in E-W direction. There are significant differences in different directions for erect panicle type, while the curved panicle type is not different. PAR interception and PAR interception rate are different at each growth stage.