1, root
Roots are an important part of plant growth, located underground, and play a role in supporting plants and absorbing water and nutrients. Tree roots are usually branched and can extend in all directions, closely contacting the soil. The structure of tree roots includes main roots and lateral roots. The taproot is usually thick and goes deep into the ground, which is responsible for downward growth and water absorption.
The lateral roots are densely distributed and are responsible for growing and absorbing the surrounding nutrients. There are many fine root hairs on the surface of the root, which increases the surface area of the root and improves the ability to absorb water and nutrients. Roots can also have a biological relationship with soil microorganisms and promote growth and nutrient exchange.
2. Crown
Canopy plays an important role in ecosystem. First of all, it provides the main photosynthesis area of trees, and produces food and oxygen by absorbing sunlight energy and photosynthesis. The tree crown also provides shelter and food source for animals living in it. Many birds and other small animals choose to nest or forage in the tree crown.
In addition to its functional function, dental crowns also have aesthetic value. The shape, color and density of the crown have a far-reaching impact on the overall effect of the landscape. Different forms of crown can create different landscapes, such as broad umbrella crown, spire crown or jungle crown.
However, the canopy also needs proper management and protection. Regular pruning and thinning can maintain the health and shape of the crown, prevent overgrowth and balance the light distribution. In addition, it is also important to protect the crown from pests and diseases and environmental pressure.
Step 3: Trunk
Trunk is the main structural part of trees, connecting root system and crown, and plays an important role in supporting and transporting water and nutrients. The trunk is usually composed of multiple layers of tissue.
The outer layer is the epidermis of the trunk, also called bark. Bark protects the internal tissues from the external environment and carries the lives of many microorganisms and insects. Its color, texture and thickness vary with tree species, providing a unique appearance of trees.
Below the bark is xylem, which consists of wood fibers, vascular bundles and lignin. The main function of xylem is to provide mechanical support for trees so that they can stand upright and resist external forces such as wind. At the same time, xylem also acts as a conduit for transporting water, nutrients and organic matter, which is realized through vascular bundle system.