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1晚霜冻概念小麦晚霜冻是由寒冬季节向温暖季过渡时期使小麦植株体温降到≤0℃引起伤害的农业气象灾害。具有不可逆性。其危害远大于早期霜冻与生理霜冻。随着暖冬年份的增多,晚霜冻灾害已成为危害小麦生产安全的重要因素。2冻害机理小麦在霜冻之前环境背景、植物学特征和生理生化反应上有4种表现形式。一是生长在较温暖的环境里,组织柔嫩。细胞内外游离水较多,遇较低温度,容易结冰。轻者细胞间隙结冰,重者原生质冻成晶体。细胞间
1 Night Frost Concept Wheat night frost is an agricultural meteorological disaster that causes the body temperature of wheat plants to drop to ≤0 ° C during the transition from the winter season to the warm season. Irreversible. Its harm is far greater than the early frost and physiological frost. With the increase of warm winter years, late frost disaster has become an important factor that endanger the safety of wheat production. 2 frost damage mechanism Wheat before the frost environment, botanical characteristics and physiological and biochemical reactions have 4 manifestations. First, growth in the more warm environment, soft tissue. More free water inside and outside cells, in case of lower temperatures, easy to freeze. Light cell interstitial icy, severe protoplasm into a crystal. Intercellular