通过多年对冬小麦幼穗分化进行观察表明,冬性品种越冬前不能进入光照阶段,弱冬性品种,一般于越冬前进入生长锥的伸长期,个别年份有的弱冬性品种甚至进入单棱期。年前处于单棱期,越冬期或返青期的低温导致冻害而死亡,因此,弱冬性品种应选用通过春化阶段需经过天数较多的品种。 Through years of observation of winter wheat spike differentiation, winter varieties can not enter the light stage before winter, weak winter varieties, generally before the winter into the growth cone of the elongation period, in some years some weak winter even entered the single-stage . Cryogenic winter in monogamy, overwintering or rejuvenation occurred years ago and died of frost damage. Therefore, the weaker winter varieties should adopt the varieties that need more days to pass the vernalization stage.