百农 64干物重增长呈 S曲线 ;抽穗前干物质分配以茎叶等营养器官为中心 ,抽穗后以穗子为中心。在栽培管理上 ,要施足基肥 ,前期适时追肥保证营养器官的顺利建成 ,抽穗前后适时适量追肥 ,可延长功能叶片的寿命 ,促进光合产物的形成及其在穗部的积累 ,以提高产量。 Dry weight of Bainong 64 showed a S curve. Before heading, the distribution of dry matter was dominated by vegetative organs such as stems and leaves, and panicle was the center after heading. In the cultivation and management, to apply Shizujifei, pre-timely top-dressing to ensure the successful completion of vegetative organs, proper amount of top dressing before and after heading can extend the life of functional leaves and promote the formation of photosynthetic products and its accumulation in the ear to increase production.