试验通过中粳稻在不同抽穗结实期的温度与产量变动情况关系的研究，结果表明水稻在穗数和每穗粒数基本确定的情况下，对产量影响最大的为抽穗结实期的日均温。当抽穗期（６天）日均温为２５．１℃、灌浆结实期（１０天，花后１０—２０天）日均温２４．７℃、抽穗至成熟期日均温２３．５—２４℃时，结实率和千粒重高，产量最高。 The results of the study on the relationship between the temperature and the change of grain yield of mid-stage japonica rice at different stages of heading and heading showed that the daily average temperature at heading and setting stage was the most important for the yield of paddy under the condition of basically determining the number of ears and grains per hectare. When the average daily temperature of heading stage (6 days) was 25.1 ℃, the average daily temperature of grain filling stage (10 days, 10-20 days after anthesis) was 24.7 ℃, and the average daily temperature from heading to maturity was 23.5-24 ℃ When, seed rate and grain weight, the highest yield.