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春霜对果树的危害远大于秋霜。因为春季气温逐渐回升,果树解除休眠进入生长期后,从萌芽、现蕾到开花坐果,抗寒力越来越弱。苹果、梨和桃等花期气温降到-1℃～-2℃时便会受到冻害,-3℃～-4℃的低温便可产生严重损伤;到坐果期,即使遇到短暂的0℃以下的低温,也会给幼嫩组织带来致死的伤害。果树开花、坐果的早春,北方冷空气时而颓侵形成的晚霜冻常对果树正常生长造成威胁。春霜冻出
Spring damage to fruit trees is far greater than the autumn frost. Because the temperature gradually rose in spring, fruit trees to lift dormancy into the growing season, from budding, budding to blossom fruit, cold weaker and harder. Apple, pear and peach and other flowering temperatures dropped to -1 ℃ ~ -2 ℃ will be frost damage, -3 ℃ ~ -4 ℃ low temperature can have serious damage to the fruit set, even encountered a brief below 0 ℃ The low temperature, will also give young organizations bring lethal damage. Fruit trees flowering, fruit early spring, the formation of the northern cold air and sometimes decadent frost often fry the normal growth of trees pose a threat. Spring frost out