不同群体下小麦花期干物质转运和冠层光分布特性研究

Study on Dry Matter Transportation and Light Distribution in Canopy of Different Wheat Population in Flowering Stage

为研究不同群体条件下小麦开花期干物质转运及光分布特性，以半冬性周麦22和弱春性郑麦9023为试验材料，研究了2个品种在不同群体条件下开花期分层干物质转运、光分布、光能利用和产量的差异。结果表明，在2个小麦品种群体中，40～60am冠层单株干物质转运量、冠层截获光合有效辐射（PAR）及其对籽粒的贡献率优于其他冠层。半冬性周麦22地上部干物质对籽粒贡献率以及产量三要素都优于弱春性郑麦9023。

The difference of dry matter transportation, light distribution, light utilization and yield of dif- ferent populations of two wheat cuhivars during the flowering stage were studied with feeble-spring variety Zhengmai 9023 and semi-winter variety Zhoumai 22 as material. The results showed that,among different population of the two wheat cuhivars, dry matter transformation of single stem,layered PAR of 40--60 cm canopy stratification,as well as the contribution of 40--60 cm dry matter to grains were better than the other parts. To analyze two wheat varieties, contribution of dry matter above ground to grains and three yield factors of Zhoumai 22 were higher than that of Zhengmai 9023.