【摘要】 多品种，多播期的试验结果表明，粒重形成的动态过程可用二次曲线模型来表征，且齐穗后２０ｄ内是粒重形成及其温度影响的主要时段；温度对粒重有效积累天数及速率的影响存在相互补偿作用，在补偿作用达到平衡时粒重达最大值，此时温度为粒重积累的适宜温度；结实期高（低）温一般要经历９～１２ｄ的连续作用才能看出其效果，并在以后时间亦有一定的影响更多还原

【Abstract】 The experimental result of multiple varieties and different sowing dates showed that the dynamic changes of rice seed weight could be simulated with quadratic curve model and that the 20 days after full heading was the key period for weight accumulation and temperature.The temperature played an important role in the seed weight accumulation through the compensatory function between the available accumulation days and accumulatiom rates.When this compensatory function reached its level of balance,the seed weight reached its utmost,during which period the temperature was most favourable for seed accumulation.Furthermore,the high or low temperature effect could be clear only on the condition of 9 to 12 days’ constant function,and it could also affect the seed weight accumulation,not only on its existing period,but also in its later stage.更多还原