一.引言水稻是我国的一种主要粮食作物。研究水稻阶段发育的规律,不论在实践上及理论上,都有很大的意义。苏联及其他国家在这方面有过研究,但对水稻春化阶段要求的温度条件以及在适宜温度条件下延续的时间未有统一的意见:有的认为水稻春化阶段要求高温(15—35℃),有的认为要求低温(3—8℃)有的认为水稻春化 I. Introduction Rice is a major food crop in China. Studying the law of rice stage development has great significance both in practice and in theory. The Soviet Union and other countries have studied in this area, but there is no uniform opinion on the temperature conditions required for the vernalization stage of rice and the duration of its extension under appropriate temperature conditions. Some people think that the rice vernalization stage requires high temperature (15-35 ° C ), And some think that low temperature (3-8 ℃) some think of vernalization