Transplantation of big trees is similar to human body surgery. During transplanting, trees cut roots that supply nutrients to big trees through saw cutting and other measures, resulting in insufficient supply of nutrients and water, and easy infection of wounds. After the transplant, the leaves that sprouted were tender and the tree's resistance was weak. Under the irradiation of sunlight, the amount of evaporation increased dramatically and it also dehydrated and died. And the transplanted large trees are vulnerable to disease and insect pests, causing significant impact on the survival rate of insects or trees. If the process of transplanting trees does not speak about science, technology, or importance, the survival rate of large trees after transplanting will be very low. Pay attention to transplanting large trees, early detection of problems, correct use of large tree transplants and maintenance products, and solve problems as soon as possible in order to effectively increase the survival rate of transplanted trees. Misunderstanding of common tree transplanting and maintenance: After transplanting the trees, they are afraid to fall flat and deep-seed or multi-filled soils. The regeneration ability of the big trees is poor, the root incisions are slowly healed, and good soil permeability conditions are required. The trees cannot be planted because they are afraid of lodging. However, if the roots are blocked from breathing, rooting should not be carried out, which can lead to root rot. If the surface is dry or the trees are wilted, they will be watered. This type of large tree after transplanting often mistakenly believes that it is the root that lacks water and tries to water it. The result is that the more the watering wilting, the faster it will be, the faster the death will be, and the topsoil will be dry. Does not mean that lack of water in the roots, there may be transplanted soil is too heavy, the soil ball at the bottom of the hot and humid is difficult to emit, but the soil moisture is still high, should pay more attention to timely cultivation of loose soil, conducive to breathability. The problems with the trees are not symptomatic, and they mistakenly believe that there are problems with the drugs and there are many factors that affect the survival of the trees, including the tree's own excessive consumption of water. It cannot be completely hoped that the use of drugs will achieve a high survival rate. Before handling the drugs, all the transplant procedures should be handled to identify problems that occur in large trees, and symptomatic medicine can be used to achieve better results. Do not take precautions beforehand. If problems occur before medication is used, the transplanted trees should be strengthened for maintenance management. In the daily maintenance, medication prevention should be carried out, instead of waiting for the problems in the big trees and relying on medications to solve the problems before they can fundamentally be prevented. Improve the survival rate of big trees. Basic Principles of Big Tree Transplantation 1. Principle of Balance of Big Trees: Normally growing large trees, roots and leaves absorb nutrients (income) and nutrients (expenditure) consumed by tree growth and transpiration can basically reach equilibrium. Only when the nutrient income is greater than or equal to that of raising branches can the tree life be maintained or its normal growth and development can be promoted. 2. Effect of digging and transplanting on the balance of large trees: After the roots of big trees are cut off, the ability to absorb water and nutrients is severely weakened or even lost. Before the trees are transplanted to survive and grow a large number of new root systems, the tree's nutrients The consumption (expenditure) is much greater than its own absorption of nutrients (synthesis). At this time, the nutrient balance of the big tree is out of balance. If there is a problem during transplantation, the big tree is characterized by wilting leaves, and when it is severe, it will eventually shrink. The tree died. According to the principles of nutrient balance of the big tree, the current advanced transplantation technology and transplantation maintenance products are used to make up for this imbalance, thus greatly increasing the survival rate. 3. After digging to meet the specific methods of balancing the balance of trees: 1). Measures to increase the "income" of large trees: Full irrigation before 3-4 days before digging; spray water or foliar fertilizer to tree body to increase nutrient of tree body; infuse liquid to tree body during transportation, and inject liquid or tree to hang trunk. The nutrient solution is used to infuse the tree body; after the transplanting and transplanting, the infusion is carried out, and the trunk infusion liquid or the big tree transplantation nutrient solution is used to infuse the tree body. 2). Measures to reduce the "expenditure" of large trees: During operation, prevent damage to the bark, avoid incision tearing, sterilize the damaged bark and incision smear protector (cure coat), apply skin grafts to the bark as soon as possible and coat the wound as quickly as possible. Membrane and dressing to prevent germs from entering. In order to prevent the loss of moisture and nutrients, all new shoots before transplanting are removed and properly trimmed. Wrap the moisturizing pad (the trunk is wrapped with non-woven linen mats, bedding, straw ropes, etc.); cover the cap with the incision.) Shade sheds are built during the transportation and after the transplant; shading is applied after the excavation, and the transpiration inhibitor is sprayed to reduce evaporation. . How to determine if a transplanted tree survives: 1. After transplanting for a period of time, observe whether the leaves of the big tree turn green and return to normal. 2. Observe whether there is any change in the color of the big bark and whether the water is full. 3 Observe whether the color of the xylem of the tree is fresh, whether it is shrinking or blackening and necrosis. 4. Draw a small observation hole near the soil ball to see if the roots are necrotic or have new roots. 5. The infusion does not flow (the tree has no absorption capacity) or the flow of fluid is very fast (xylem dry or hollow tree), indicating that the big tree is not alive or weak. Watch out for the phenomenon of “false death and false living†in big trees: False living: refers to the phenomenon that the tree body distributed buds by self-cultivation, but did not take root, and the nutrient-depleted shoots shrank and died down after a while. Therefore, it is not possible to judge whether or not the big tree survives. False death: It means that the nutrient of the tree is relatively abundant, but it does not take a bud, and it does not take root. It is thought that the tree has died. The tree in the phenomenon of suspended animation, as long as the nutrients and moisture are supplied at a later stage, and rooting conditions (breathing, anti-water accumulation, etc.) are maintained in the roots, and the maintenance supplies that promote the survival of large trees, such as rooting fluid and trunk infusion solution, may sprout. Rooting, if you do not take timely measures, it may become a real dead tree. The "root" is the basis for judging the survival of a big tree. It is determined whether or not the big tree survives by checking whether or not a new root system has been issued after the big tree is transplanted.
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