Based on the field experiment with different sowing\|date and controlled temperature treatment in the climatic chamber of rice varities,we analysed the dynamic change characteristics of amylose content(AC)in developing grain and the ecological effects of temperature during the filling period.the result showed that,the change trend of AC forming could be simulated by quadratic equation or cubic equation,the AC value was very low at the beginning stage of grain filling,then increased rapidly and the peak of A...