树木休眠是树木每生长发育周期中的一个阶段,亦是树木的老体或一部分在某一时期内由于受外界条件(气侯:包括空气、日光、温度、水分、风等)不适于树木的生长而引起树木停止生长的现象。树木除南方热带潮湿的地方一年四季生长外,一般温带寒冷的地方不是整年生长的。在一年四季中,它的生长有一定的周期性。从树木形成层发育来看,春天最盛,夏天次之,秋天又次之,冬天则停止生长,春夏两季各种条件具备, Tree dormancy is a phase of growth and development of trees. It is also a part of trees that are not suitable for trees due to external conditions (climate, including air, sunlight, temperature, moisture, wind, etc.) Growth caused by the phenomenon of trees to stop growing. In addition to the tropical south of the wet and humid growth throughout the year, the general temperate cold is not the year-round growth. In all seasons, its growth has some periodicity. In terms of the development of the tree-forming layer, the spring is the highest, the summer is second, the autumn is second, and the winter is stopped. The spring and summer seasons have various conditions,