Wrap grass and film
Wrap the trunk with straw curtain or directly with straw, and then fix it on the trunk with thin straw rope. Then spray the straw with a hose or sprayer, or soak the straw curtain or straw and wrap it. Then wrap the plastic film around the straw curtain or straw, and finally tie the film to the trunk. The lower part of the trunk clings to the soil ball to spread the film. After the basement is covered with soil and watered, it is covered with plastic film together with the dry bag. The periphery of the plastic film is closely combined with the soil, so that the temperature and humidity of the trunk space of the package can be ensured by adjusting the soil temperature, and the work of supplementary watering can be omitted.
Tie rope and film
First, tie the trunk tightly with thick straw rope, pour the straw rope into the water, tie the plastic film and keep it moist. The ground is covered with plastic film, and the method of pressing soil at the bottom is the same as the first method, which has obvious moisturizing and temperature regulation effect and is also conducive to survival.
Tie grass, film and cloth
In some very beautiful landscape environments, because grass wrapping and film binding will affect the landscape effect, after the grass wrapping and film binding are completed, a thick layer of white linen can be wrapped around the trunk and trees. This can not only coordinate with the environment, but also prevent the temperature in the film from being too high in summer, which is also good for the survival of the trunk.
material
The above three methods of moisturizing trees are the same in principle, but there are differences in material selection. The trunk is sealed with plastic film, which is forced to keep warm and moist. It is more stable and even than the traditional manual water spraying maintenance, and can minimize the impact and damage of bad weather on trees. Therefore, in March and dog days, the film must not be removed. 1 ~ 2 years growth period, the film can not be uncovered until the trees grow stably. The above-mentioned trunk moisturizing operation can also be carried out before planting big trees, which is more convenient. Make a good plan and plan (1) and take measures more than one year in advance to promote the absorption of roots in the ball (block) in advance.
(2) Selecting trees, and conducting field investigation on transplantable big trees, including measuring and recording tree species, tree age, stem height, etc. And take pictures. Judge whether it is suitable for excavation, packaging and hoisting; Analysis of existing problems and solutions.
(3) Cut the roots and shrink the lump, and judge the difficulty of transplanting survival according to the habit, age and growth of the tree species. When digging, it is best to only cut off the fine roots and leave the thick roots above 1cm, and peel them into a circle with a line width of about 10cm. Make preparations before excavation. After specific selection of trees, they shall be numbered and marked according to the planting design. If the soil is too dry, water it a few days before excavation, and designate a special person to prepare the necessary tools, materials, machinery and lifting vehicles. When picking up and packing trees, the size of clods should be 10 ~ 20 cm wider than roots. In order to reduce the weight of the mound, the topsoil should be shoveled off. Soft soil ball packaging is suitable for transplanting trees with DBH 10 ~ 15cm. Soft soil can be used when the soil ball does not exceed1.3 m. In order to ensure safety, wooden sticks should be used to support the trunk above the branch point. Lifting and follow-in. Before lifting, remove the support, tie up the tree crown, select the locomotive with lifting and loading capacity greater than the tree weight and the lifting type suitable for site construction. When transporting trees, people who are familiar with the route and other conditions should stand near the trunk (don't stand at the soil ball) to escort them, and prepare insulating tools for supporting and lifting wires. If it is not planted immediately after being transported to the site, the upper wood will be padded immediately after unloading, so that the steel wire rope can be put on when planting and hoisting. Plant and maintain, check the potholes and sit in the right position. Check and adjust the specifications of the pit to make it flush with the soil after planting. If the soil is not good, it should be increased, and soil replacement or fertilization should be prepared in advance. When entering the cave, aim at the main viewing surface. When landing near the ground, one person is responsible for aiming straight, and four people sit by the pit, draw out the wire rope and tie the crown block with a long pole. Compaction 1 time every 20 ~ 30cm until it is compacted. Greening and maintenance measures
After the planting project, it began to enter the survival and maintenance period. Survival maintenance period * * * 12 months. During the maintenance period, a special maintenance team will be set up. During the whole maintenance period, various maintenance measures, such as cleaning, replanting, watering, weeding, pruning, pest control, fertilization and cold protection, will be carried out according to the contract and actual conditions to ensure the effectiveness of relevant facilities and the healthy growth of plants. Take a series of conservation measures in the process of greening and conservation to better manage plants.
Herbaceous flowers should be pruned before bud formation to avoid cutting off flower buds. After the flowers wither, they should be cut off in time. Perennial flowering plants should cultivate flower branches purposefully to make flowers bloom in all seasons. The shaping effect of hedges and flower beds should be coordinated with the surrounding environment, enhance the landscaping effect, and carve out fine products with great care.
Reasonable irrigation and fertilization should be carried out according to the growth and flowering characteristics of plants. In the rainy season, the daily rainfall is slightly larger than the transpiration of this type and specification, and fertilization is generally concentrated in spring and autumn two or three times a year. Fertilizers should not be exposed, and different methods such as burying or watering can be used. Burying can be done by digging holes or ditches. After fertilization, the soil should be leveled, stabilized, soaked and leveled. Generally, it can be combined with weeding and loosening soil to fertilize.
Weeding: Weeds and loose soil should be removed frequently. When removing impurities and loose soil, the root system should be protected, so as not to damage the root system and expose the root system, let alone the loess.
Replanting and replanting: clear up the dead seedlings in time, replant the original seeds within one week and make the specifications as close as possible to the original plants to ensure excellent landscape effect. Replanting should be carried out according to the planting specifications, and maintenance measures such as applying sufficient base fertilizer and strengthening watering should be taken to ensure the survival rate of more than 98%. Shrubs and flowers that are aging or obviously incompatible with the surrounding environment should be replanted in time.
Prevention and control of pests and diseases: timely prevention and control of pests and diseases, careful management and feeding of plants to enhance their ability to resist pests and diseases, regular inspection, early detection and early treatment. Comprehensive control, chemical control, physical artificial control and biological control are adopted to prevent the spread of pests and diseases and affect plant growth. Try to reduce environmental pollution by biological control.
When chemical methods are used for prevention and control, spraying is generally carried out at night; Drugs, dosage and environmental impact should meet the requirements and standards of environmental protection. Pests and diseases occur, and the most serious harm rate is below 5%.
The standard of first-class tree maintenance is vigorous growth, strong branches and leaves, and beautiful tree shape. The lower edge line of street trees is neat, moderately trimmed, dry and straight, with beautiful crown, no dead trees and litter, and the landscape effect is excellent.
Growth potential: the growth potential is strong, and the growth amount exceeds the average annual growth amount of this tree species; Thick branches and leaves, thick branches, dark green leaves, no litter.
Pruning: Considering the growth characteristics of tree species, such as germination period and flowering period, except Palmae plants, other trees are generally pruned before the differentiation of leaf buds and flower buds to avoid cutting off leaf buds and flower buds, so that flowering trees can flourish. The tree shaping effect should be coordinated with the surrounding environment, and the landscaping effect should be enhanced and pruned in time. Pruning should be carried out in accordance with the operating procedures, try to reduce the wound, the incision should be flat, and no tree nails can be left; Shade branches, drooping branches, sprouting algae branches and dry branches and leaves below the lower edge line should be cut off in time.