根是构成植物体的主要部分之一,它不仅是吸收和输送水分与营养物质的器官,而且是使物质形成、贮藏和进行繁殖的器官。不同的树木种类,它的根系有不同的形态和构造,虽同一树种,由于生长地条件不同,根系发育情况也不一样。所以当选择造林树种及研究树木的混交时,不仅要调查各种树种的地上部生长,而且也要了解地下部根系在土壤中的结构特性和彼此互间的关 The root is one of the main parts that make up a plant. It is not only an organ that absorbs and delivers moisture and nutrients, but also an organ that forms, stores, and reproduces. Different types of trees, its roots have different shapes and structures, although the same species, due to the different conditions of growth, root development is not the same. So when choosing afforestation species and studying the mix of trees, not only to investigate the growth of the aboveground species of various tree species, but also to understand the subsurface root structure in the soil structure and mutual relations