小麦冬季冻害是指进入冬季越冬至早春返青期间,由于寒潮降温超出冬小麦抗寒能力而对小麦植株造成的伤害,一般发生在每年的11月至翌年的2月初。据报道,过去的50多年中我国平均每5～7年发生1次较重的冻害。近几年,我国小麦冬季冻害发生次数多、范围广、影响大。2004年12月下旬,受 Winter winter frost damage refers to winter winter to early spring rejuvenation period, due to cold wave temperature exceeds winter wheat cold hardiness and the damage caused to wheat plants, generally occur in November each year to early February the following year. It has been reported that in the past 50 years or so China’s average once every 5 to 7 years occurred a heavier frost damage. In recent years, winter wheat freeze injury in our country occurs more frequently and has a great impact. In late December 2004, subject to