选用23个小麦品种(系),从源、流、库的角度探索了籽粒皱缩的生理机制。皱缩指数与生物产量的相关性极弱(r=-0.0671),而与充实速率呈显著的负相关(r=-0.544~(**)),说明籽粒皱缩的原因是库的转运速率不高。籽粒的饱满程度还受制于库的活性,表现在籽粒发育后期,皱缩品种(系)的酸性蔗糖酶迅速下降,活性显著地低于饱满品种(系)。 23 wheat cultivars (lines) were selected to explore the physiological mechanism of grain shrinkage from the perspectives of source, flow and storage. The correlation between shrinkage index and biomass was very weak (r = -0.0671), but negatively correlated with the filling rate (r = -0.544 ~ (**)), which indicated that the reason for grain shrinkage was the transport rate not tall. The fullness of grain is also affected by the activity of the library, which showed that the acid sucrase rapidly decreased and its activity was significantly lower than that of full varieties (lines) in the late grain stage.