Cinnamomum camphora is widely used as street trees, street trees and scenic forests because of its dense branches and leaves, dense crown and majestic tree posture.
Single planting, cluster planting, group planting or as a background tree can be used, and can be planted in Chi Pan, waterside, hillside and flat land.
Cinnamomum camphora is an evergreen tree with a height of 30 meters.
The canopy is oval.
The bark is green and smooth when young; It turns yellow-brown with age and has transverse cracks.
Branches and leaves smell of camphor.
Leaves are thin leathery, wavy, alternate, ovoid to ovoid-elliptic, with sharp apex, dark green shiny surface, blue-white back and orange in autumn to spring.
May flowers, flowers bisexual, small, yellow-green.
Berry is spherical, 0+00 ~ 165438 is close to purple-black when it matures.
Cinnamomum camphora likes warm and humid climate and is not cold-resistant.
It develops well in deep and fertile clay, sandy loam, acidic and neutral soil.
Resistant to moisture, drought, barren and saline-alkali soil.
Resistant to chlorine, carbon dioxide, fluorine, ozone, etc.
The growth rate of Cinnamomum camphora is moderate and slow, and it is faster in childhood and slower in adulthood.
It grows twice a year, germinates in early March, starts to grow in March-April and changes a lot of leaves, reaches its peak in April-May, blooms in May-June, stops growing at the end of June after flowering, germinates autumn shoots and a few secondary branches in August-September, and stops growing in1October when the fruit matures.
Cinnamomum camphora is a typical combined branch type, its dryness is weak first and then strong, and the tree is tall and weak. According to the different requirements of garden trees and street trees, the height of plastic belt is 2.5 ~ 3.5 meters.
Cinnamomum camphora seedlings should be densely planted to prevent the lateral branches from stretching too long, but not too close, otherwise the growth will be weak.
Because Cinnamomum camphora grows rapidly, it should be transplanted at least twice at seedling stage, and the spacing between plants will be gradually relaxed through multiple transplanting.
And every transplant should be trimmed correctly.
Because of the weak dryness in infancy, it is very difficult to cultivate camphor trees with straight trees, and the pruning workload at seedling stage is heavy.
In order to adapt to its weak trunk, the trunk and middle trunk of Cinnamomum camphora seedlings should be treated like "central stem-leading shape", which is called "stem-leading pruning"
The principle of leadership pruning is to train cadres, and several leading cadres have been trained successively.
At the beginning, it is to raise stems, and the strong buds around the top buds of seedlings need to be peeled off in time to ensure the healthy growth of the central main stem.
If there are two central leaders going hand in hand at this time, it is necessary to "preserve the strong and eliminate the weak" and remove one in time.
Generally, 2-year-old camphor tree seedlings begin to branch, but the position is very low. At this time, attention should be paid to thinning the side branches in time to avoid the influence of strong side branches on the extension of the middle trunk, but the weak side branches can be retained as supporting branches, and the branch parts always account for more than 2/3 of the height of the whole plant.
After reaching the branch height required by the shaping belt, 3 ~ 5 main branches are selected as skeleton branches according to the shaping method of multi-head trunk shape.
The azimuth angle of skeleton branches should be symmetrical, the branch spacing should be properly opened, and the opening angle is generally not large.
At this time, it is not important whether there is a central main stem, and the growth advantage of the central main stem is no longer deliberately reserved, but mainly 3 ~ 5 main branches as the advantage of the whole shaft until it is formed.
After the main branches are perfected, the original supporting branches under the plastic belt are removed.
After the standardized camphor tree seedlings are applied to the green space, it is very convenient to trim them. As long as we continue to pay attention to maintaining the balance between elliptical crown (that is, the middle part is more prominent) and branches at all levels, we can prevent the occurrence of bad trees such as flat crown, concave crown or chaotic distribution of branches.
Trimming techniques such as thinning and cutting can be used as needed.
Cinnamomum camphora grows in the peak season of spring and summer, and it is mainly pruned in spring and can also be pruned in summer, but the pruning amount is small, so it is said that "spring is strong and summer is weak".
The pruning time at seedling stage is mainly in spring, and it is maintained and pruned 1 ~ 2 times a year.