冬去春来,在果园中时常可以发现果树枝干冻害或枝梢抽干的现象,这使生产蒙受很大的损失。果树枝干冻害分因冬季绝对温度过低,而造成的广泛性冻害,和因春季暖而复寒引发的形成层冻害两种类型。树种和品种的不同抗寒力亦有很大差别,在落叶果树中苹 Winter to spring, in the orchard can often be found in the dry branches of fruit trees or freeze-dried branches of the phenomenon, which makes the production suffered a great loss. Fruit branches dry frost damage points due to the absolute temperature in winter is too low, resulting in a wide range of frost damage, and due to spring warm and cold caused by the formation of two types of frost damage. Trees and varieties of different cold resistance are also very different, in the deciduous fruit trees in the apple