干热风是小麦籽粒灌浆期间的主要灾害性天气。干热风造成了一些不可逆的伤害,小麦叶片的叶绿素含量和光合速率迅速减少,细胞膜系统丧失了正常功能,由于叶片里氮的净损失,引起氮代谢平衡的破坏,诱发了代谢紊乱和造成饥饿,小麦灌浆源严重减少。干热风伤害的机理,实质上是间接伤害。 Dry hot wind is the main catastrophic weather during wheat grain filling. Dry hot wind caused some irreversible damage, the chlorophyll content and photosynthetic rate of wheat leaves decreased rapidly, the cell membrane system lost its normal function, the net loss of nitrogen in the leaves caused the destruction of nitrogen metabolism balance, induced metabolic disorders and caused hunger, Severe reduction of wheat filling source. Dry hot wind damage mechanism, in essence, is an indirect injury.