越冬冻害是我国北方地区冬小麦生产中的最大灾害。解放以来,大凡冬小麦大幅度减产,差不多主要都是由于严重冻害所造成。关于冬小麦越冬死亡的原因,苏联许多学者早在本世纪30年代就有过不少研究,认为分蘖节温度降到-15℃到-20℃以下就会发生严重冻害。近20年来,新疆地区对小麦冻害问题进行了大量研究。1963,1970,1973各年,新疆不少地区的麦苗死亡率在早春不断加重,部分同志认为是早春冻害,另一部分同志则认为是冬季低温冻害的延续表现(先是假生长,尔 Winter frost damage is the largest winter wheat production in northern China’s disaster. Since the liberation, almost all winter wheat production has been substantially reduced, almost due to severe freeze damage. As for the reasons for the overwintering of winter wheat, many scholars in the Soviet Union have made quite a number of studies as early as the 1930s. They think that serious frost damage occurs when the temperature of the tillering section drops below -15 ° C to -20 ° C. In the past 20 years, a large number of studies have been conducted on the frost damage of wheat in Xinjiang. In 1963, 1970 and 1973, the mortality rate of wheat seedlings in many areas of Xinjiang continued to increase in early spring. Some comrades considered it as frost damage in early spring, while others commented that it was a continuation of winter frost damage (first, fake growth, Seoul