Cinnamomum camphora is a subtropical tree species, mainly distributed in the south of the Yangtze River, and it is an evergreen tall tree of Catalpa in Lauraceae. Flowers in early summer, yellow-green, panicle, broad crown, lush foliage, shady everywhere, magnificent momentum, is an excellent street tree and shade tree. Cinnamomum camphora has the characteristics of temperature resistance, corrosion resistance and insect repellent because of its special aroma and volatile oil. It is an ideal material for making expensive furniture, high-grade buildings, shipbuilding and sculpture. Camphor for daily use is a white crystal extracted from the roots, stems, branches and leaves of camphor tree. It is colorless and transparent, and has a cool fragrance. Used for moth prevention, and also widely used in medicine and chemical industry.
In the folk, people often regard Cinnamomum camphora as a landscape tree and a geomantic tree, which means avoiding evil spirits, longevity and good luck. Cinnamomum camphora is favored by the majority of urban and rural residents, and it has been selected as a "city tree" in cities such as Hangzhou, Yiwu and Maanshan.
Cinnamomum camphora is very distinctive, its bark is rough, but its texture is very uniform, and there has never been mottled poplar or tumor of willow. The branch is divided into two and two into four. They won't cut corners or gild the lily. The crown is spherical in shape, drawing a beautiful curve in the sky. Zhangshu is the calligraphy of Dongpo, Su Like. Round and continuous, handsome and elegant, but quite satisfactory. If it is a hillside full of camphor trees, it is simply a peerless monument of Su Dongpo. Therefore, people who study art like to use camphor tree as the object of sketch. What is even more rare is that camphor tree has a special fragrance, which can repel insects, and gardeners hardly need to spray pesticides. These two days in Jiangxi, which is famous for its camphor trees, I feasted my eyes, which greatly satisfied my special interest in human nature. Cinnamomum camphora is everywhere in Jiangxi, and there are many ancient trees over 500 to 600 years old, scattered in villages, rivers and hilltops.
Cinnamomum camphora smells unique and fragrant for the first time.
The shape of the tree is also very beautiful.
It has high photosynthetic efficiency under light, because it has many leaves and can release a lot of oxygen.
As for breathing oxygen at night, it's nothing.
There is no particularly powerful statement.
However, the leaves of Cinnamomum camphora are quite powerful, and they fall all year round, with the most in spring ~ ~
Garden planting will be even more inconvenient! !
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 to greatly reduce the water loss of the whole tree, 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.