The advantages and disadvantages of big tree transplantation
In recent years, with the development of landscaping, more and more trees have been planted in large trees and highways. In order to promote their survival, many people have adopted the practice of suspending water to supplement fertilizers. This method can maintain the balance of water supply and consumption after the transplanting of large trees and promote the survival of the trees. However, if they are abused, they will not only fail to achieve the desired effects, but will cause fertilizer damage and affect the normal growth of the trees. Some new problems deserve attention.
The big trees suspend water to supplement fertilizers, and drill holes in the trees so that the well-matched nutrient solution naturally flows into the tree body. The advantage is that the supplemental nutrients are not affected by the rhizosphere soil conditions to reduce the fertilizer efficiency and can directly enter the tree body. All parts, so the general amount of economic and effective, but it should be seen that the tree to absorb mineral nutrients are roots and leaves, mainly root. Various nutrients enter the roots through complex physiological processes in the roots, and some of these nutrients must be assimilated into organic nutrition in the roots before they can be transported to various sites via the catheter. Absorption of nitrogen by the tree is mainly composed of ammonia nitrogen and nitrate nitrogen, while the main transport by pipeline is organic nitrogen and a small amount of nitrate nitrogen. The absorption of phosphorus and sulfur is mainly orthophosphoric acid and sulfate ion, transport is still orthophosphoric acid and Sulfate ions dominate, and a small amount is transported organically. The transportation and absorption of metal ions are all ionic. It can be seen that the nutrient form transported by the catheter is not completely consistent with the absorption of roots. Therefore, not all fertilizers are suitable for hanging water. Only nutrients in fertilizers can be transported in conduits. Can be applied to hanging water. Therefore, the fertilizer that enters the tree body, if the nutrient form is unsuitable, may also damage the catheter tissue. Some unwanted substances that enter the tree body with the fertilizer water may even affect the growth and development of the tree body. The method of hanging water is used to drill the tree trunk. The nutrients that enter the tree body are difficult to balance and the local nutrient concentration is too high will cause damage to the tree body. For example, after the use of hanging water, the young leaves and the edge of the petal are scorched, and some of the branches are hindered from growing, and some of the branches may even die. In addition, there are obvious side effects of supplementing fertilizers by hanging water. If the number of trunks is too large and the drilling time is long, it will also cause mechanical damage. Therefore, this method must not be abused.
In order to reduce the side effects of drip-fed fertilizer, it is necessary to pay attention to the water quality of drip-fed fertilizer. It is better to use purified water or distilled water to reduce impurities and toxic and harmful substances in water. Trunk hole drilling should pay attention to the upper and lower branches of the catheter in the trunk, as far as possible to make the dispersion of the aqueous solution is good, the input of fertilizer liquid such as acidity of the tree is strong, will cause the xylem flowing through different degrees of injury, often hanging water will make the xylem affected Damage affects the normal absorption and transportation of nutrients by the tree. Supplementing fertilizer with suspended water can not cure the problem and can only meet the temporary needs. Only by cooperating with other measures to promote survival, the transplanted tree can form its own independent roots as early as possible, and can fundamentally solve the needs of trees for fertilizer and water.
The use of stem syringes and sprayer infusion, the frequency and time should be observed depending on the water requirement of the transplanted trees, when the stump has produced a new root or drawing, can stop the infusion, and timely use Bordeaux mixture or fungicide such as lime sulfur Blocking the orifice to prevent the bacteria from invading and roting the borehole. In freezing weather, it is not suitable for hanging water to prevent freezing damage to the plants.
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