At present, the construction of urban gardens and the construction of fast-track roads, the direct transplantation of large trees has become quite common, which has led to a sharp increase in the number of large-scale nursery stocks for seedling producers. No matter whether it is a tree planted for greening or transplantation, or a big tree for nursery production or transplanting, there is a problem of how to increase the survival rate. Otherwise, it will cause great waste of resources and significant economic losses for construction and production units. To this end, this reporter interviewed the general manager of Changzhou Huayu Garden Wood Co., Ltd. Dai Fang.
Reporter: Transplanting large trees can have a rapid effect on greening construction. However, it is risky and technically strong. Please contact General Dai to talk about practical experience in this area.
Dai Fang: The transplanting of trees is generally conducted in winter and spring, and the risk of transplanting is greater in summer. However, our company has accumulated mature experience in transplanting large trees. It can be transplanted all year round, and the survival rate is above 98%. As far as the general situation is concerned, at present, there are fewer transplants of large trees in the summer, and there is not much to say about transplanting techniques. Here, we mainly talk about the maintenance and management of the past summer. To transplant a tree to survive, the most essential phrase is called "keep the balance of water metabolism in the tree."
Reporter: "To maintain the balance of water metabolism in the tree," what measures need to be taken?
Dai Xiangfang: There are two sentences here: The ground part should be moisturized, and the underground part should be protected.
Reporter: How to moisturize the ground?
Dai Shifang: 1, lump dry: With straw rope, pouch, moss and other materials wrapped tightly around the trunk and the more robust branches. The above dressing has a certain degree of moisture retention and heat retention. After being treated with a bag, one can avoid direct light and dry wind, reducing the evaporation of water from trunks and branches. Secondly, it can store a certain amount of moisture to keep the branches moist. Third, it can adjust the temperature of branches and reduce the temperature and temperature. Low temperature damage to the branches, the effect is better. At present, some areas use plastic film to dry, this method is good in the tree dormant stage, but the tree should be promptly replaced before sprouting. Because the poor permeability of the plastic film is not conducive to the respiration of wrapped branches, especially in the hot season, the internal heat is difficult to be distributed in time, causing high temperatures, burning branches, buds or buds, causing damage to the tree.
2. Water spray: The above-ground part of the tree (especially the leaf surface) is susceptible to water loss due to transpiration and must be sprayed with moisture in time. Spraying water is required to be fine and uniform, sprayed on all parts of the ground and surrounding space to provide a humid microclimate environment for the tree. High-pressure water spray can be used, or the water supply pipe can be installed above the canopy, and one or more fine-hole nozzles can be sprayed according to the size of the canopy, and the effect is better, but it is more labor-consuming. Some people adopt the method of “suspending salt waterâ€, that is, putting a number of salt water bottles filled with clean water on the branches, and using the principle of hanging salt water, let the water in the bottles slowly drip on the trees, and add water regularly, which saves labor. It also saves investment. However, the water spray is not uniform enough and the amount of water is difficult to control. The tree that is generally used for crown removal needs to be moisturized after spraying branches and leaves.
3. Shading: In the early stage of transplanting or during the high-temperature and dry season, shady shades should be used to reduce the temperature in the shed and reduce the water evaporation of the trees. In areas where plants are planted in rows, grown in dense areas, and where density is high, it is advisable to build large sheds, save materials and facilitate management, and solitary planting trees should be planted by plants. All shades are required to be shaded. A distance of about 50 centimeters from the canopy is maintained above and around the arbours to ensure that there is a certain amount of air flow space in the shed and to prevent sunken damage to the canopy. The degree of shading is about 70%, so that the tree receives a certain amount of scattered light, in order to ensure the tree's photosynthesis. Later, depending on the growth of the trees and the changes in the season, shades are gradually removed.
Reporter: There are three measures for moisture on the ground, and what are the methods for promoting roots in the underground?
Dai Fang: The underground part of the promotion of roots should also pay attention to three points:
1. Water control: Newly transplanted large trees, weakened water absorption function of the roots, and have less demand for soil moisture. Therefore, just keep the soil moist. Excessive water content in the soil will affect the permeability of the soil, inhibit the respiration of the roots, and be detrimental to rooting. Severely, it will lead to the death of rot. For this reason, on the one hand, we must strictly control the amount of soil watered. For the first time when transplanting, it should be irrigated. Afterwards, depending on the weather conditions, the soil texture, inspection and analysis, and careful watering. At the same time, beware of excessive water droplets entering the root zone when spraying. In the second aspect, it is necessary to prevent tree pool water accumulation. The watering hole left after planting should be filled or slightly higher than the surrounding ground after the first irrigating, to prevent rain or water accumulation when watering. At the same time, in the low-lying and easily reclamated areas, open drains to ensure timely drainage on rainy days. In the third aspect, it is necessary to maintain a suitable groundwater level (general requirements -1.5 meters or less). At the higher groundwater level, net drainage should be done. When the water level rises in the flood season, deep wells can be dug in the outer part of the root system, and the groundwater can be pumped out of the site with a pump to prevent flooding.
2. Protection of sprouts: The germination of new shoots is a sign of the physiological activity of the newly planted tree and is a hope for the survival of a large tree. More importantly, the germination of the aerial part of the tree has a natural and effective stimulating effect on the root system and can promote the germination of the root system. Therefore, in the initial stage of transplantation, the sprouts of the trees that are heavily pruned during transplantation must be protected, and the branches should be pulled out. After the trees survive, they are trimmed. At the same time, after the sprouting of the tree, special efforts should be made to enhance water spray, shading, disease prevention and pest management, and ensure the normal growth of shoots and shoots.
3. Soil aeration: Maintaining good air permeability of the soil is conducive to root germination. To this end, on the one hand, we must do a good job of cultivating loose soil to prevent soil compaction. On the other hand, always check the soil ventilation facilities (snorkel or bamboo cage). If it is found that the ventilation facility is clogged or has accumulated water, it should be promptly removed to maintain good ventilation performance.
Reporter: Moisturizing the water balance of the tree body and improving the survival rate of planting trees is very clear. Please pay to Dai, what should you pay attention to in the management of fertilizer and water in the process of survival?
Dai Fang: In the early summer in the south, there is more rain, especially in the Huangmei season. If there is accumulated water, submersible pumps can be used to drain the water inside the cave one by one to avoid the trees being soaked in water.
As for fertilization, it is impossible to fertilize the trees in the first year due to the great damage to the trees. In the second year, according to the growth of the trees, the manure fertilizer will be sprayed on the leaves.
Reporter: What needs to be done in pest control?
Dai Fang: The trees are sawed and transplanted. The trees have many wounds, and the buds are tender. The tree's resistance is weak, and it is vulnerable to diseases and insect pests. If you do not pay attention to precautions, the insects or trees may quickly die after being infected. To strengthen prevention. Can be used carbendazim or thiophanate, enemy killing and other pesticides mixed spraying. In April, July and September, three phases were sprayed continuously at each stage, and once a week, the purpose of prevention and control can be achieved under normal circumstances.
Steel Stacking Commode,Stacking Commode Chair,Steel Stacking Commode With Potty,Steel Frame Stack Commode Chair
Active Life Healthcare Co.,Ltd , https://www.alh-med.com