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小麦早春冻害又称倒春寒,是指小麦在过了“立春”季节进入返青拔节这段时期,因寒潮到来降温,地表温度降到0℃以下,发生的霜冻危害。因为此时气温已逐渐转暖,又突然来寒潮,故也称为倒春寒。小麦早春冻害原因:在4月份小麦已先后完成了春化阶段和光照阶段的发育,小麦完成春化阶段发育抗寒能力降低,通过光照阶段后开始拔节,完全失去抵御0℃以下低温的能力,当寒潮来临时,夜间晴朗无风,土
Early winter frost damage, also known as late spring cold, refers to the wheat in the “Spring” season into the green back to join this period, due to the cold coming cool, the surface temperature dropped below 0 ℃, the occurrence of frost damage. Because at this time the temperature has gradually warmed up, and suddenly came the cold, it is also known as late spring cold. In early spring wheat frost damage causes: in April wheat has completed the vernalization stage and the development of the light stage, the completion of wheat vernalization stage development of cold-resistant ability to reduce, through the light phase after the beginning of jointing, completely lose the ability to resist low temperature below 0 ℃, When the cold comes, the night is clear and windless, soil