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通过多年、多播期、多品种结实期分段取样和人工气候箱控温试验，结果表明，水稻齐穗后２０ｄ内是稻米粒重和整精米率形成及其对环境因素影响反应的主要和敏感时段；粒重和整精米率有效积累天数和积累速率对结实期温度影响的反应存在相互补偿作用，并据此估算出粒重形成的适宜温度指标为：籼稻２４．１４～２５．５０℃，粳稻２３．６５～２４．８３℃；整精米率形成的适宜温度指标为：籼稻２３．１１～２４．６５℃，粳稻２１．６１～２３．４８℃；结实期温度对粒重和整精米率形成的影响效果存在累积延续作用
The results of multi-year, multi-sowing, multi-variety seedling stage sub-sampling and artificial climate chamber temperature control showed that within 20 days after heading, the formation of rice grain weight and milled rice rate and the main response to environmental factors Sensitive period; grain weight and milled rice rate of effective accumulation of days and accumulation rate of the impact of grain temperature during the reaction there is mutual compensation, and thus estimate the formation of grain weight appropriate temperature indicators: Indica 24.14 ~ 25.50 ℃ , 23.65 ~ 24.83 ℃ for japonica rice, and the suitable temperature index for the formation of milled rice rate was 23.11-24.65 ℃ for indica rice and 21.61-23.48 ℃ for japonica rice. The impact of the formation of the cumulative effect of the existence of a continuum