Effects of temperatures on spikelets per panicle of rice

This paper studied effects of weather conditions on spikelets per panicle by the method of interval sowing times in the field.The results showed that temperature was a major factor affecting formation spikelets per panicle.Under the condition,two temperatures (25.0±0.2℃,30.1±0.4℃ for japonica rice and 19.4-23.5℃,30.1±0.6℃ for indica rice) was beneficial to the formation of spikelets per panicle. The temperature of 27.9±0.2℃ was not beneficial to the formation of spikelets per panicle of japonica rice,whereas the temperature of 24.6-27.7℃ was not beneficial to the formation of spikelets per panicle of indica rice.