引言冻害是我国北方冬麦区普遍存在的重要灾害。国内外虽然进行了多年的研究,但对其变化规律尚未完全掌握,应用上仍然存在着很大的距离。为了找出冻害温度指标的规律,我们利用适期播种的冬小麦进行了低温冷冻模拟试验,找到了冬小麦在越冬期不同阶段的冻害死亡温度、绝苗温度的指标,分析了负积温对冬小麦的影响。 Introduction Frost damage is a common disaster in northern winter wheat area in our country. Although many years of researches have been done at home and abroad, the laws of its variation have not yet been completely mastered, and there is still a long way to go in application. In order to find out the law of frost damage temperature index, we simulated the low temperature freezing with suitable sowing winter wheat and found the index of frostbite death temperature and the temperature of frostbite in different stages of winter wheat, and analyzed the effect of negative accumulated temperature on winter wheat .