苹果幼树抽条是指果树越冬后枝条死亡的现象。在我国北方苹果产区均有不同程度的发生,尤其是富士系、玉林、红津轻等品种发生较重。据调查,轻者死树2％,重者死树达90％,甚至全园毁灭。 一抽条原因 1.气候因素:苹果幼树抽条发生在春季发芽前,这时气温开始回升,空气湿度偏低,风大风多,使枝条的蒸腾作用加强,再加上地温偏低,根 Apple young tree pumping refers to the fruit trees after the death of the phenomenon of branches. Apple production in northern China have varying degrees of occurrence, especially in the Fuji, Yulin, Hongjin light and other varieties of heavy occurrence. According to the survey, the light dead tree 2%, heavy dead tree reached 90%, and even the whole park destroyed. A pumping reasons 1. Climatic factors: apple young tree sprouting occurred in the spring before germination, when the temperature began to rise, the air humidity is low, the wind gusts and more branches to enhance transpiration, coupled with the low ground temperature, root