网址：www.dzyangguang.com.cn 2022-06-08 作者：admin 阅读：
Seedling quality is of great importance. We should pay attention to the
selection of seedlings with strong branches, full buds, no diseases and
pests, and beautiful shape. In addition, because it is used for
supplementary planting, the specifications of seedlings should be
unified and coordinated with the specifications of surrounding
seedlings. The height of branches and nodes of supplementary planted
trees, especially street trees, should be unified, and the tree shape
should be as plump as possible.
The trees shall be watered once a week before excavation to make up the
water, so as to avoid premature dehydration after seedling emergence.
When digging seedlings, it is generally necessary to bring soil balls.
Generally, the diameter of soil ball shall be calculated as 8-10 times
of DBH. Deciduous tree species can also use open root seedlings, and the
root length is also 8-10 times of DBH. When excavating, dig vertically
downward along the outer ring of the specified root width. In the
process of excavation, in case of thick roots, cut them off with a hand
saw to avoid root splitting, try not to damage the root skin and fibrous
roots, and retain the original soil.