Abstract: To analyze the most suitable and severe temperature indicators， we studied the influence of temperature on the development and yield components of hybrid rice Yueyou 9113 at different sowing dates with different temperature. The results showed that under the appropriate meteorological conditions， as the sowing date delayed 5 d， the effective accumulated temperature and the average daily effective temperature reduced by 60℃ and 0.65℃ in the whole growth period， respectively. The yield was proportional to the effective accumulated temperature from heading to maturity stage， when the effective accumulated temperature increased 50℃， the yield increased 767.5 kg·hm-2. The dates of maximum available tillering of Yueyou 9113 were basically at booting stage， and the most suitable effective accumulated temperature for tillering process was 1 292.4℃ during turning green stage to booting stage. Temperature of flowering stage was the main meteorological factors affecting rice yield components， 1 000\|grain weight and grains per panicle had a significant correlation with the average temperature of 5 days after heading. The results showed that 26.9℃ （average temperature of 5 days after heading） was the optimal temperature for Yueyou 9113， while the minimum and maximum temperature were 15.5℃ and 38.1℃， respectively.

Key words: late rice Yueyou 9113, sowing date, minimum temperature, effective accumulated temperature