东北以纬度来说一般的是在北纬三十八度至四十七度之间,冬季温度和摄氏零下二、三十度左右,气候的寒冷冠于全国,所以在东北栽培果树,防寒是极为重要而不可忽视的。以苹果来说,其最低温度在零下十 Northeast latitude is generally between 38 degrees north latitude to 47 degrees, the winter temperature and Celsius minus two or thirty degrees, the climate of the cold crown in the country, so the cultivation of fruit trees in the northeast, cold is extremely Important and can not be ignored. For Apple, its lowest temperature is minus ten