干热风是华北地区影响小麦高产、稳产的主要气象灾害,农民称为“旱风”、“热风”、“火风”、“西南风”等,是高温、干旱和风等气象因子综合的影响,破坏作物正常的光合作用和水分平衡,使作物提前成熟,籽粒干秕,影响产量。干热风和干旱有区别。干热风是一种持续时间较短的特定的天气现象,在干旱地区和长期干旱的情况下,最易出现干热风天气。另外,作物受害的症状也不一样。受干热风影响,植株很快地由上往下青干,而干 Dry and hot winds are the major meteorological disasters that affect the high yield and stable yield of wheat in North China. Peasants called “dry wind”, “hot wind”, “fire wind” and “southwest wind” are the comprehensive effects of meteorological factors such as high temperature, drought and wind, Destroy the normal crop photosynthesis and water balance, so that the crops mature in advance, dry seeds, affecting the yield. Dry hot air and drought are different. Dry hot air is a specific short-duration weather phenomenon that is most likely to occur in dry and dry conditions in long-arid and dry conditions. In addition, the symptoms of crop damage are not the same. Affected by the dry hot wind, plants quickly dry from top to bottom, and dry