With the continuous improvement of environmental requirements in modern society, large tree transplantation has been gradually adopted for its characteristics of optimizing the structure of green land and improving people’s living environment. Now I will introduce some experiences in transplanting as follows:
I. Preparation
1. Tree species selection. In the middle and southern part of the province, the tree species can be selected from the original local tree species, such as Fartung, Liu, Guochao, Chinese wolfberry, persimmon, walnut, saponin, etc., with long life span, strong adaptability, beautiful green landscape, and many latent buds. Tree species are effective.
2. Tool preparation. Based on the size, quantity, and distance of the transplanted trees, personnel, transportation vehicles (such as flatbeds, cranes, etc.) and excavation and planting tools should be reasonably arranged.
3. Select trees and handle. Should choose to grow strong, full of development, no obvious diseases and insect pests, a certain high dry, can reach the green design standards of the tree. Mark the yin and yang side of the big tree before excavation, and then carry out measures such as thinning and shortening the crown (reduced to 1/2-1/3 of the original crown), and treat the wound caused by the trunk. Dry healing agents can promote wound healing, reduce bacterial infections, inhibit wound water loss, and apply white lacquer or lime milk.
4. Planting hole treatment. The size of the planting hole should be determined according to the diameter of the big tree. For example, if the DBH is 15 cm, the diameter of the planting hole should be about 1.5 meters. The soil at the bottom of the tree hole is kept horizontal. If you need to change soil, you must fill in the virtual soil and use water to sink.
Second, excavation planting
1. Time. Transplanting trees are carried out from late March to early April and before the trees germinate. The trees that germinate early are moved first (for example, willows), and the germinations are moved backwards (such as sycamore and ash, etc.). At this moment, the trees are still asleep, and the sap has not yet flowed. It is necessary to follow, transport, plant, and pour.
2. Dig seedlings. When digging bare-rooted seedlings, first ensure that the roots of the seedlings are less damaged (the roots are generally not less than 8-10 times the diameter of the DBH). The better the whole, the smoother the broken roots. It is best to bring the heart and soil, and then use a pouch or hemp rope tied tightly. When suspending the seedlings with a crane, put a 1-inch-thick block of wood on the contact surface between the steel cord and the soil to prevent the soil from loosening due to excessive local force.
3. Yun Miao. When seedlings are too tall and there are cables and communication lines on the walking route, seedlings must be kept at a certain angle. In order to prevent the lower branch from being injured, it is necessary to do a stand protection on the transport vehicle.
4. Planting. According to the requirements of the depth of the roots of the trees, the big tree is placed in the pit. The yin and yang face of the tree is the same as the original, and the planting depth is slightly shallower than the original 2-3 cm. When bare-rooted trees are planted, the root system must be stretched and not rooted. When the soil is filled to 1/2 of the pit, the seedlings are gently shaken or raised a few times, and the soil is filled and compacted. After the trees are planted, do a triangular stand or lead wire hanger. Pillar pieces should be put on the part where the pillar and the trunk are connected to prevent the bark from being worn.
Third, post-plant management
1. Watering. Immediately after planting, watering, pouring feet, water, rooting powder can be added to the water. Because the newly transplanted trees suffer from damaged roots and reduced ability to absorb water, ensuring adequate water is the key to ensuring the survival of the trees. Then the tree discs are mulched to facilitate the elevation of ground temperature and promote hair rooting. The first tree roots and germination are the guarantee of survival. In addition to timely watering, water spray mist or tree trunk ropes or plastic wraps should be wrapped according to species and weather conditions. In short, moisturizing, raising temperature is the core of the survival of a large tree transplant.
2. Pest control. After the newly planted trees are alive, the branches and leaves are small, the tree vigor is weak, and the resistance to diseases and insect pests is poor. It is necessary to conduct regular inspections and timely take preventive measures according to the occurrence of pests and diseases.
3. Drainage. After the big trees were transplanted, according to weather precipitation, topography, soil quality, tree species and other factors, a comprehensive analysis, especially Summer rainfall, low-lying, soil-viscous land masses and planted intolerant tree species to do a good job of drainage.
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