This kind of tree is also called Cinnamomum camphora and Cinnamomum camphora cl. Lauraceae plants. This is a tree 50 meters high. Its crown is huge and oval, and its bark is green and smooth when it is young, grayish brown or yellowish brown when it is old, with irregular longitudinal cracks. Leaves alternate, ovoid to ovoid, 6- 12 cm long, slightly covered with white powder below, with three veins at the base and glandular points in the axils of veins. Panicles are born in the axils of new branches, with small yellow-green flowers. The fruit is nearly spherical, 6-8 cm in diameter, and purple-black at maturity. The flowering period is April-May, and the fruiting period is August-165438+1October. Produced in the south of the Yangtze River basin, especially in Taiwan Province, Fujian, Jiangxi, Hunan and other places. I like light and shade, warm and humid climate, especially deep, fertile, humid and slightly acidic or medium sandy soil. Deep roots, strong germination, long life, strong resistance to smoke, sulfur dioxide and ozone. Seeding and propagation are the main methods, and soft branch cutting or tillering can also be used. Cinnamomum camphora is a beautiful shade tree, street tree, scenic forest and shelter forest with deep roots and luxuriant leaves. It can be planted in streams, Chi Pan, lonely, gathered on lawns, patched and clustered as background trees.

Key points of anti-season construction of Cinnamomum camphora;

1. Seedling selection

The characteristics of plants largely determine the survival rate and planting effect of plants, so it is particularly important to choose seedlings for greening, especially anti-season greening. The use of camphor trees out of season should start from the following aspects:

1) Selection of transplanted trees: Cinnamomum camphora with straight trunk, fresh bark and strong tree vigor transplanted in the last two years should be selected, and its new fine roots are concentrated in stumps, so the survival rate of trees is high.

2) Heel-in seedlings: After a few months, the Cinnamomum camphora seedlings began to grow new roots at the roots, and the roots were more active, making it easier to survive when planted in unsuitable seasons.

3) Choose seedlings with large soil balls: Cinnamomum camphora seedlings dug from the nursery, if used for off-season planting, the soil balls are larger than normal. The bigger the soil ball, the more complete the root system, and the easier it will be to plant. If it is a bare-rooted seedling, it is also required to have as much soil as possible, with long roots and more fine roots.

4) Use small seedlings as much as possible: Small seedlings have stronger rooting ability and higher transplanting survival rate than large seedlings. As long as it is not in a hurry to get better greening effect soon, it should be used.

Pruning and remodeling

Survival and scenery are the unity of opposites; To ensure the survival rate, it will inevitably destroy the landscape effect to a certain extent. How to coordinate the contradiction between them and pruning is one of the keys.

1) Overall pruning of bare-rooted Cinnamomum camphora seedlings: before planting, the root system should be arranged, and the broken, dead and rotten roots should be cut off, and the main roots without fine roots should be cut short; The crown of the tree should also be trimmed. Generally, 1/3~ 1/2 of all branches and leaves should be cut off, which greatly reduces the transpiration area of the crown.

2) Pruning of Cinnamomum camphora seedlings with soil balls: the seedlings with soil balls need not be pruned at the roots, but only at the crown. When pruning, the branches and leaves of the crown 1/3~ 1/2 can be cut off, and the water loss of the whole tree can be reduced by greatly reducing the leaf area, but the basic tree shape should be maintained to speed up the landscaping and achieve the greening effect as soon as possible.

3. Planting technology treatment

In order to ensure the survival rate of planting, the following problems should be paid attention to in the process of planting and corresponding technical measures should be taken.

1) Determination of planting time: the planting should be timely, that is, the trimmed camphor tree seedlings should be planted immediately. If the transportation distance is far away, the root pile should be wrapped with wet grass and plastic film to keep it moist. The best planting time is before 1 1 am or after 16 pm. In winter, just avoid the coldest days.

2) Planting: according to the general technical regulations, dig the planting hole, apply base fertilizer at the bottom of the hole and lay a fine soil cushion, so that the planting soil is loose and fertile. Remove the topdressing of camphor tree seedlings, pay attention to planting seedlings in the planting hole (pay attention to the ornamental surface of the tree), then fill the soil and insert it, and continue to fill the top of the hole. Finally, make a cofferdam around the seedlings to stop water.

3) Irrigation: Cinnamomum camphora seedlings should be watered immediately after planting. For camphor tree seedlings with soil balls, stir the soil around the tree hole with iron bars or wooden sticks to fill it with water. Be careful not to damage the earth cofferdam when injecting water. The earth cofferdam should be filled with water, so that the water can slowly soak the planting holes. In order to further improve the survival rate of colonization, auxin can be added to the irrigated water to stimulate the growth of new roots. In general, naphthylacetic acid is used as auxin. Firstly, powdered naiacetic acid was dissolved in a small amount of alcohol, and then mixed with clean water to make irrigation solution with a concentration of 200PPm, which was used as the first root-fixing water for irrigation.

4) Special technical treatment for transplanting Cinnamomum camphora: In the process of transplanting, in order to keep the humidity of Cinnamomum camphora trunk and reduce the transpiration of bark water, the trunk should be wrapped with soaked straw rope until it reaches the top of the trunk, and if the branches are large, they should be wrapped. Then, the prepared clay mud is thickly covered on the trunk wrapped with straw rope. In the future, you can often spray water on the trunk with a sprayer to keep it moist. After the big camphor tree is dug out, it is necessary to trim the broken roots, broken roots and dead roots, and then soak the roots with clay mud after cutting; If 0.03% sodium acetate auxin is added to the mud, it can promote the growth of new roots of Cinnamomum camphora after transplanting.

4. Seedling management and maintenance

Because camphor trees are planted out of season, it is necessary to strengthen maintenance and management after planting camphor trees. Pay attention to watering at ordinary times, and master the principle of "don't dry it, water it thoroughly"; It is also necessary to spray clean water on the ground and camphor leaves regularly to increase air humidity and reduce plant transpiration. In hot summer, the newly transplanted big camphor tree is shielded by a sunshade net to avoid direct sunlight. In cold winter, the ground should be covered with grass, wind barriers should be set on the side of the tree, the crown of the tree should be covered with film, and the trunk should be wrapped with straw (the film should be tied on the basis of straw wrapping in windy and low temperature places) to keep the soil warm and prevent freezing injury.

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