小麦生育后期的光合作用与产量

THE RELATION BETWEEN YLELD AND PHOTOSYNTHESIS OF LATE-GROWTH PERIOD IN WHEAT

文中总结了小麦生育后期光合作用的一般特征及其与产量的关系。讨论了肥料、水分、CO_2、光照,温度及生长调节物质等因素对该期光合作用的影响;并对小麦灌浆期光合作用下降的原因加以分析;从育种、栽培方面对光能利用进行了探讨。

Sowing at suitable time, there were differences in both canopy photosynthesis and grain yield of winter wheat (cv. Lumai No.5) at the following plant densities: 8×10~4, 16× 10~4and 24×10~4seedlings per mu. A small plant stand had higher canopy photosynthetic rate, higher dry matter accumulation rate, larger LAD value and longer active grain-filling duration. Grain growth rate declined with increasing of plant density, esp. 16 days after anthesis. The theoretical basis of cultivation with high grain yields and low sowing rate is discussed in relation with community structure and dry matter production.