北方地区春季风大干燥,日照时间长且强度大,降水量少,温度低,土壤解冻慢。因此,为了最大限度提高新植大树的成活率和移栽质量,北方地区大树移植通常在春、秋两季进行。 The spring monsoon in the northern part of the country is very dry with long sunshine hours and high intensity with little precipitation, low temperature and slow thawing of the soil. Therefore, in order to maximize the survival rate and transplanting quality of newly planted large trees, large tree transplants in northern China are usually carried out in spring and autumn.