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根据天气预报,今年可能会出现极寒天气,对小麦的安全越冬会造成极大影响。因此,预防小麦冬季冻害非常有必要。小麦冻害主要分为两种情况一是越冬期冻害。11月底至12月初,如果出现严重霜降或冻雨,极易造成越冬期冻害。冻害程度较轻时主茎和大分蘖的幼穗受冻,叶片皱缩严重,即使抽穗,顶端和下端缺粒严重;冻害严重时,小麦叶片、叶尖干枯或青枯,心叶脱水,甚至死亡。二是返青期冻害。通常指的是倒春寒影响。
According to the weather forecast, this year may be arctic weather, winter wheat will have a significant impact on the safety. Therefore, the prevention of winter frost damage is very necessary. Frost damage to wheat is mainly divided into two cases, one is the winter frost damage. From the end of November to the beginning of December, severe frost or freezing rain can easily cause frost damage during winter. When frost damage is mild, the young stems of main stems and big tillers are frozen, and the leaf folds are severe. Even if heading, the grains at the top and bottom are severely damaged. When the frost damage is severe, the leaves and tips of wheat are withered or withered, death. Second, return to green frost damage. Usually refers to the impact of late spring cold.