The results showed that, as the increment of density, the population leaf area index (LAI) , net canopy photosynthetic rate(NCP) and canopy leaf source capacity (CLSC) increased before anthesis, but decreased quickly during grainfilling.

• 随着密度增加 ,开花前的叶面积指数 (L AI)、群体净光合速率 (NCP)、群体叶源量 (CL SC)提高 ,但生育后期衰减较快 ;