小麦早春若遇大雪、寒流、冰冻等低温天气，极易发生冻害。据调查，看性品种比冬性品种受害重，早播小麦比适括小麦受害重，单一施肥比配方施肥受害重。且受害程度主茎重于分集，低位分获重于高位分荣。受害小麦一般减产10％～30％，重者达50％以上。小麦幼穗冻害的形态特征：? Wheaten snow in early spring wheat, cold, freezing and other cold weather, prone to frost damage. According to the survey, it is harder to see sex breeds than winter breeds. Early-sowing wheat is harder than wheat, and single-fertilization is heavier than formula fertilization. And the degree of victimization of the main stem is more than diversity, low points were higher than the highest points Rong. Victims of wheat generally cut 10% to 30%, severe cases of more than 50%. Morphological characteristics of wheat panicle frost damage:?