研究证明:从促进抽穗来看,前期(播种至生理拔节期)都以低温短日光周期为宜。低温不是使其通过春化阶段的唯一因素,短日光周期也可促进春化。当低温短日光周期不足时昼夜温差又是促进春化的一主要因素。因此断定,春化在低温效应中不是恒温效应,而是变温效应。不能笼统地称小麦为“低温长日型”,而是“低温短日—高温长日型”. Studies have shown that: from the perspective of promoting heading, early (sowing to physiological jointing) are low temperature and short solar cycle is appropriate. Cold weather is not the only factor that allows it to pass the vernalization stage, and short daylight cycles can also promote vernalization. When low temperature short daylight cycle is insufficient, the temperature difference between day and night is also a major factor to promote vernalization. Therefore concluded that vernalization in the low temperature effect is not a constant temperature effect, but the variable temperature effect. Can not generally be called wheat as “low temperature long day”, but “low temperature short day - high temperature long day.”