When will camphor trees be planted?

Question 1: When was camphor tree planted in the north? Cinnamomum camphora should not be planted in the north, and the problem of wintering has not been solved. I advise you not to intervene blindly for the time being. If you really want to plant Cinnamomum camphora, the survival rate will be the highest in April. At that time, it has basically begun to grow, including the roots. Because it is a ding green tree species, don't be confused by its dormant period. I wish you success!

Question 2: Planting method of Cinnamomum camphora:

Sowing propagation

When the fruit is ripe, it falls by itself and the bird pecks it. Breeding with seeds should be sown with the harvest, with 7200-8000 seeds per kilogram, germination rate of 70-80% and yield per mu of 10- 15 kg. Afforestation can also sprout and renew. Pests and diseases include powdery mildew, black spot, camphor sawfly, camphor leaf roller moth, camphor moth, camphor beetle and so on.

Seedling raising technology

1. Description: Cinnamomum camphora is a good material for first-class architecture, furniture and technology with excellent material and rich fragrance. Camphor of camphor tree and camphor oil are widely used in science and technology, OEM, medicine and national defense industry. In addition, Cinnamomum camphora is an excellent tree species for greening in the "four modernizations". Cinnamomum camphora is an evergreen tree, which likes light, has strong taproots, developed roots, warm and humid climate, strong adaptability, fast growth and long life. It grows best in the floodplain with deep soil layer.

Second, raise seedlings.

1. time. Mature seeds are harvested every year10-1February, then stored in sand, and can germinate and sow in early March.

2. Soil preparation. Plow and rake for the first time in early winter, and plough and rake for the second time before sowing, and apply sufficient base fertilizer. Generally, the base fertilizer is decomposed manure, with a per mu 1.500-2.000 kg or 50 kg of urea, 50 kg of phosphate fertilizer and 0/.50 kg of vegetable cake. Then, a high bed is built, with a general bed height of 35-50 cm and a bed width of 65,438.

3. accelerate germination. In early March, camphor trees need to be germinated before sowing. Seeds can be soaked in warm water at 50℃. After cooling in warm water, soaking the seeds in 50℃ water for 3~4 times can make the seeds germinate 10~ 15 days earlier.

4. sow seeds. The row spacing of drilling is about 20 cm, and the sowing amount per mu is 10~ 15 kg. After sowing, cover the soil with straw or plastic film to keep the surface soil of the seedbed moist, which is beneficial to seed germination.

5. Tending management. After the seedlings are unearthed, the straw or plastic film should be pulled out in time, and the seedlings can be thinned when they grow a few real leaves, and the seedlings can be fixed when the height of the seedlings is about 10 cm. There are about 20,000 camphor trees per mu. After July, it is necessary to strengthen the management of fertilizer and water, and often loosen the soil and weed. Stop topdressing and irrigation in late autumn. Topdressing is usually 2~3 times, the first two times can use 7~ 10 kg urea, and the last time can use 10 kg urea and 7.5 kg phosphate fertilizer. The annual seedlings of Cinnamomum camphora/KLOC-0 can reach more than 50 cm, and the ground diameter is more than 0.7 cm.

3. The suitable transplanting time is from the middle and late March to the early April, and the transplanting density is about 0/500 plants per mu/kloc. After transplanting, it was cut off at about 10 cm above the ground. When the buds grow to about 10 cm, the main stem can be fixed, and the redundant branch buds can be cut off, leaving thicker branches. Apply 2000 kilograms of manure to the bed in winter. In this way, the DBH of 3-year-old seedlings can reach more than 3 cm.

Transplanting technique

grow seedlings

Large seedlings should be transplanted, the suitable transplanting time is from the middle and late March to the middle and early April, and the transplanting density is about 22,500 plants /hm2. After transplanting, it was cut off about 10cm from the ground. When the bud grows to about 10cm, the trunk can be fixed, and the redundant branches will be cut off, leaving the thicker branches of 1. In seedling raising, cultivation management work such as intertillage, weeding, soil cultivation, topdressing, irrigation and pest control should be carried out in time. Seedling tending shall be carried out at least 3 times in the first 1 year and 1~2 times in the second year. Cinnamomum camphora has many sprouting branches. The first three years were used to wipe off buds, mainly to wipe off 2/3 of the buds on the ground. In winter, 30 tons /hm2 manure is applied on the bed surface. In this way, the DBH of three-year-old seedlings can reach more than 3cm. When you leave the nursery, you should bring mud balls and cut off branches and leaves appropriately to improve the survival rate of afforestation.

Transplanted Cinnamomum camphora

Cinnamomum camphora with straight trunk, fresh bark color and vigorous tree growth 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. Try to use the seedlings in the heel as much as possible. After a few months, the roots of camphor trees in the heel begin to grow new roots, and the roots are more active, so it is easier to survive when planted in unsuitable seasons. If the seedlings of Cinnamomum camphora dug out of the nursery are planted out of season, the soil ball is bigger than normal. The bigger the soil ball, the more complete the root system and the more successful the planting. If it is a bare-rooted seedling. It is also required to be as thoughtful as possible, with long roots and more fine roots. Try to choose seedlings. Small seedlings have stronger rooting ability and higher survival rate than big seedlings. As long as they are not in a hurry to get better greening effect soon, they should be used. 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 1l in the morning or after 16 in the afternoon, but in winter, just avoid the coldest weather. & gt

Question 3: How many years does it take for camphor tree to grow up? What are the precautions for planting? Cinnamomum camphora is a fast-growing tree species, which can grow to about 20 cm thick in 10 year. Just be careful not to be flooded when planting. Management is relatively extensive.

Question 4: When is the best time to plant camphor trees in the south? 5 points: 2010-08-1912: 24 adopted by netizens.

Cinnamomum camphora, also known as Cinnamomum camphora, is one of the precious timber trees in China. Evergreen all year round, with beautiful tree shape, it is also an excellent tree species for surrounding greening.

Seed treatment:

Sow in early February to early March in spring, or sow in winter harvest. Drill sowing is adopted, the spacing between strips is 30 cm, and the sowing amount per mu is 25 kg. Wet-stored seeds should be treated to accelerate germination before sowing, and seeds should be soaked in warm water intermittently to accelerate germination, and seeds should not be soaked at high temperature to avoid scalding them. After sowing, the thickness of soil cover is about 2 cm, and straw or Leymus chinensis should be covered after soil cover. Seeds germinate 20~30 days after sowing, and germinate neatly. After the seeds germinate, the mulch should be removed in time. Accelerate germination. In early March, camphor trees need to be germinated before sowing. Seeds can be soaked in warm water at 50℃. After cooling in warm water, soaking the seeds in 50℃ water for 3~4 times can make the seeds germinate 10~ 15 days earlier. You can also use the film wrapping method to accelerate germination, that is, the seeds mixed with river sand are wrapped with film, exposed to the sun, turned over 2~3 times a day, and kept moist until a small number of seeds begin to germinate.

Sowing method:

Camphor trees can be planted in winter or spring, but spring sowing is better. Before sowing, it is necessary to soak in 0.5% potassium permanganate solution for 2 hours for disinfection and sterilization, and accelerate germination to improve seed germination rate. The row spacing is 20-25 cm, and 30-40 seeds are put in each meter of sowing ditch, and about 65438 02 kg is sown per mu. After sowing, cover the seeds with fireclay ash or yellow mud, the thickness of which is equal to that of no seeds, and then cover them with straw for heat preservation and moisture retention to promote seed germination.

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Question 5: How many years does it take for camphor tree to grow up? What are the precautions for planting? Cinnamomum camphora is a fast-growing tree species, which can grow to about 20 cm thick in 10 year. Just be careful not to be flooded when planting. Management is relatively extensive.

Question 6: The depth, length and width of the planting pit of Cinnamomum camphora cultivation technology should reach 50 ~ 60 cm. Planting depth should be equal to the root diameter of Cinnamomum camphora seedlings. When planting, the mulch soil should be closely connected with the hole soil, and the hanging space will be formed if the soil is not tight. Whether planting camphor trees on cloudy days or sunny days, you should water them thoroughly in time. In dry and exposed weather, it should be irrigated once every 7 days or so. 3 ~ 4 times in a row. 1 Before the whole cutting planting of Cinnamomum camphora seedlings with bare roots, the root system should be arranged, the main roots with broken roots, dead roots, rotten roots and no fine roots and short joints should be cut off, and the crown should be trimmed. Generally, 1/3 ~ 1/2 of all branches and leaves should be cut off, so that the transpiration area of the crown is greatly reduced. 2 Pruning 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. Cinnamomum camphora has many short branches and strong continuous fruiting ability. As long as the tree is in a normal state, it will bloom in large numbers every year. However, if the amount of flowers is too large, the load is too heavy, and there is excess nutrition in the tree, it will also show the consequences of the years. Therefore, it is necessary to remove excess flowers and fruits in time. However, Cinnamomum camphora has a short flowering period and a small female organ. Therefore, in terms of consumption, it is not the flowers that have become thinner, but the fruits that have become thinner. But Cinnamomum camphora is tall, and it is difficult to dilute flowers and fruits. So some places try to dilute flowers and fruits with chemicals. Special technical treatment: in the process of transplanting, in order to keep the humidity of camphor tree 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 branch is large, it 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. 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. First, the nursery land is clean and open, the ground is flat, the leeward is sunny, the drainage is good, the water source is sufficient, and the groundwater level is low. Generally speaking, a gentle slope of 2 ~ 5 degrees is better. Deep ditches must be dug in the flat ground to drain water and reduce groundwater. The soil should be sandy loam or loam with deep soil layer and rich organic matter. Before freezing in early winter, the first ploughing should be carried out to accelerate ripening, and the ploughing should not be too deep to control the overgrowth of main roots and promote the growth of lateral roots. Apply sufficient base fertilizer, usually farmyard manure, before sowing. 2. Collection and storage of seeds 1 1 In the middle and late June, when the Cinnamomum camphora berries are purple-black, the fruits are collected from the robust and pest-free mother trees. Recovered berries should be treated in time to prevent deterioration. That is, put the fruit in a container or pile it up and add water to soften the pulp. Wash it with clear water and take out the seeds. Scatter the seeds thinly in a cool and ventilated place to dry, and then carefully select them, so that the purity of the seeds can reach over 95%. Third, sowing Cinnamomum camphora can be carried out in autumn or spring, and spring sowing is better. Autumn sowing can be sowed with sowing, before the soil freezes in late autumn. Spring sowing should be carried out after the soil thaws in early spring. Before sowing, the seeds should be soaked in 0. 1% bromogeramine solution for 3-4 hours for sterilization and disinfection. The seeds can germinate 10 ~ 15 days in advance by accelerating germination with warm water of 50 degrees, keeping the water temperature and soaking the seeds for 3-4 times repeatedly. Camphor trees can be drilled at a spacing of 25-30cm, with a trench depth of about 2cm and a width of 5-6cm. Sow 40-50 seeds per meter in furrow, and the sowing amount per mu is about 15kg. Fourth, tending management, seedling management: after the seedlings are unearthed, remove the plastic film in time to avoid yellowing of the seedlings. When the seedlings grow 2-3 true leaves, the seedlings are thinned. To achieve early seedling spacing, staged seedling spacing, timely seedling spacing, seedling spacing of about 7 cm. Intermittent strong seedlings should be planted separately to save seeds and improve the emergence rate. Pay attention to shading and water conservation after planting to ensure survival. Timely transplanting: the annual Cinnamomum camphora seedlings are about 60 cm high, the root diameter is about 0.8 cm, and the seedling yield is about 25,000 plants per mu. Except for afforestation, the annual camphor tree seedlings can not meet the standard of urban greening seedlings, and must be cultivated for 3 ~ 6 years after transplantation. Shading: In high temperature season, the water evaporation of trees is relatively large. Before the root system fully recovers its function, excessive water loss will seriously affect the survival of trees ... >>

Question 7: How to plant Cinnamomum camphora, also known as Cinnamomum camphora and Cinnamomum camphora, is one of the precious timber trees in China. Evergreen all year round, with beautiful tree shape, it is also an excellent tree species for surrounding greening. An evergreen tree with an oval crown. The bark is grayish brown and longitudinally cracked. Leaves alternate, oval, thin leathery, with three veins at the base. Conical tidbits axillary on new branches; Perianth yellowish green, 6-lobed. Drupe is spherical, purple-black when mature, and the fruit is tray-shaped. Flowering in May: Fruit ripens in September-165438+1October.

First, ornamental characteristics and garden use

This tree species has dense branches and leaves, large crown and strong shade. It is an excellent tree species for urban greening and is widely used as street trees, shade forests and scenic forests. Chi Pan, waterside, hillside and other places. Cluster planting, group planting, solitary planting or as a grassland background tree. . Camphor oil can be extracted from its roots, stems and leaves. Cinnamomum camphora contains important components such as eucalyptol, safrole, linalool and terpineol, which are widely used in raw material industry and medicine.

Second, ecological habits.

Like light, slightly resistant to shade; Like warm and humid climate, the cold resistance is not strong, young branches are frozen at-180℃, and the requirements for soil are not strict, and they are resistant to water and humidity, but they are not resistant to drought, barren and saline-alkali. The taproot is developed and deep, and can resist wind. Strong germination and pruning resistance. The growth rate is moderate and slow. It has a certain ability to resist tidal wind, smoke and toxic gases, and can absorb a variety of toxic gases, which is more suitable for urban environment.

Third, distribution.

Generally, it is bounded by the Yangtze River in the north and Guangdong, Guangxi and Southwest China in the south, especially in the southeast coastal provinces such as Jiangxi, Zhejiang, Fujian and Taiwan Province. The vertical distribution can reach 1000m, which is more common in low mountains, hills and villages in nature. South Korea and Japan also produce it.

Fourth, reproduction and cultivation.

Mainly through sowing and propagation, but also through twig cutting and root tillering. Seed was collected in June 10~ 1 1, and drilling was conducted in the spring of the following year (from the end of February to the beginning of March). The row spacing is 20~25cm, and the dosage per mu is 10~ 13kg. Suitable sowing row spacing1.5-20cm, deep border spacing1.5-2.0cm, width of 3-4cm, and sowing 40-50 seeds per meter in the sowing border (seeding can be adopted if "seedling transplantation" is needed). Cover with fire, thickness 1-2 cm, build a shade shed with 50% sunshade net, and spray water once every morning and evening. 3-4 seedlings are cultivated in separate beds or nutrient bags, and management is strengthened according to nursery norms. 1 year-old seedlings are 50-80 cm high, which can be planted out of the nursery and raked in time during growth.

Five, seedling technology

(1) Selection of nursery land: The nursery land should be sandy loam and loam with deep soil layer, loose soil, fertile and moist soil, sufficient water, good drainage and slight acidity, and paddy field and alkaline earth should not be selected. Soil preparation, soil disinfection and base fertilizer application are basically the same as other broad-leaved trees. Prepare soil in early winter, plough and rake for the first time, plough and rake for the second time before sowing, and apply sufficient base fertilizer. Generally, the base fertilizer is decomposed manure, with a per mu 1.500-2.000 kg or 50 kg of urea, 50 kg of phosphate fertilizer and 0/.50 kg of vegetable cake. Then, a high bed is built, with a general bed height of 35-50 cm and a bed width of 65,438.

(2) Seed collection: When collecting seeds, you should choose a robust mother tree that is about 40 years old and free from pests and diseases. The fruit can be harvested in mid-June at 5438+065438+1October when the berries are purple and black. Recovered berries should be treated in time to prevent deterioration. Treatment: You can put berries in a jar or bucket, soak them in water for 2-3 days, and then scrub them when the peel is separated from the seeds. Scrubbing tools can be bamboo baskets or dustpans. After peeling and removing pulp, mix plant ash degreasing 12-24 hours, then wash and dry in the shade. 100 kg berries can get 25-30 kg pure seeds. 1000-grain weight 120- 130g, and there are 76-80 million pure seeds per kilogram. The germination rate is 80-90%.

(3) Seed treatment: sowing in early February to early March in spring, or sowing with harvest in winter. Drill sowing is adopted, the spacing between strips is 30 cm, and the sowing amount per mu is 25 kg. Wet-stored seeds should be treated to accelerate germination before sowing, and seeds should be soaked in warm water intermittently to accelerate germination, and seeds should not be soaked at high temperature to avoid scalding them. After sowing, the thickness of soil cover is about 2 cm, and straw or Leymus chinensis should be covered after soil cover. Seeds germinate 20~30 days after sowing, and germinate neatly. After the seeds germinate, the mulch should be removed in time. Accelerate germination. In early March, camphor trees need to be germinated before sowing. Seeds can be soaked in warm water at 50℃. After cooling in warm water, soaking the seeds in 50℃ water for 3~4 times can make the seeds germinate 10~ 15 days earlier. You can also use the film wrapping method to accelerate germination, that is, the seeds mixed with river sand are wrapped with film, exposed to the sun, turned over 2~3 times a day, and kept moist until a small number of seeds begin to germinate.

......& gt& gt

Question 8: What are the planting requirements of Cinnamomum camphora and how to plant it with higher survival rate! Cinnamomum camphora is regarded as an excellent landscaping tree species in courtyards, streets, parks and other scenic spots in many places because of its fast growth, evergreen, lush foliage and beautiful crown shape. For example, the suburbs of southern Shaanxi and Wuxi, Jiangsu Province were listed as suitable tree species and vigorously promoted, and later listed as "city trees" in Wuxi, which were well received by the masses. I. Collection and Preservation of Seeds Choose plants with beautiful plant types and vigorous growth as mother trees. When collecting seeds, we should master their mature characteristics and harvest them in time. When the seed coat is black, it indicates that the seed is mature. After harvesting, wash the seed skin and take out the seeds to dry. Then, sand is stored in ventilation room or field soil hole with low groundwater level by layered method. The humidity of sand is generally measured by kneading it into a ball by hand and then letting it go. Secondly, loam with loose fertilizer and water and good air permeability is selected as the sowing place for field sowing and seedling raising. In Shaanxi and southern Gansu, sowing in spring from mid-March to early April is suitable for autumn seedling raising and vulnerable to freezing injury. It is wise to fine and level the soil with a high bed. Sowing adopts 25 cm row spacing. After sowing, the thickness of covering soil is 2 ~ 3 cm, which is permeable to water. After sowing, the seedbed should pay attention to moisture conservation, and the straw can be covered and removed after seedling emergence. In this way, the emergence rate can reach more than 90%. Third, transplant planting After repeated experiments, people think that transplanting camphor tree seedlings after one year is the best. Don't choose bedridden seedlings because bedridden seedlings have not been successfully planted, so choose seedlings that have been transplanted and cultivated for several years. The transplanting density of seedlings is 0.5m×0.3m After transplanting, reasonable seedling density can be maintained, which makes preparations for seedling raising in root-protecting soil, promotes the development of lateral roots and fibrous roots, and is beneficial to the survival rate of Cinnamomum camphora. The more transplanting times, the more developed the root system and the higher the survival rate. Note that 1 year-old Cinnamomum camphora seedlings should be cut off and covered with straw to preserve moisture when they are vulnerable to freezing injury in late autumn. The ground diameter of 2 ~ 4 cm is suitable for nursery seedling. The trunk bark of the seedling should be green. If the trunk is dark brown, it means that the seedlings are old and not suitable for planting. The number of branches removed can be roughly divided into three grades according to the years of transplanting cultivation:1/2 of the total number of branches removed after transplanting for 3 ~ 6 years; After transplanting for 7 ~ 10 years, cut off 3/5; One-year transplanting 1 1 ~ 65438+4/5. The pruning method is to cut off all the branches below 1/3 of the tree. Choose more than 2/3 trees, and their lateral branches are evenly distributed in 3 ~ 7 layers. The planting time of Cinnamomum camphora is more important. Spring in southern Shaanxi is from mid-late March to mid-April, and September is suitable for autumn. March 25th to April 10 is the best time in Wuxi, followed by rainy season, which is a good opportunity for replanting. Cinnamomum camphora seedlings should be planted with mulch with a diameter of about 30cm, and the soil should not be lost. After emergence, the branches and leaves can be cut off, and 1 ~ 3 leaves can be kept to avoid the influence of water transpiration on the survival of seedlings. But be careful not to go to the top, or the crown will form a bull. In addition, in order to adapt to trans-provincial and trans-regional transportation, a certain number of side branches should be removed to improve the survival rate. It is observed that the survival rate of leafless seedlings after planting is only 30% ~ 50%. When pruning, the cutting mouth should be close to the trunk, without leaving short sections and tearing the bark. The depth, length and width of the planting pit should reach 50 ~ 60 cm. The planting depth should be flush with the roots and necks of Cinnamomum camphora seedlings. When planting, the covering soil should be closely connected with the hole soil. If the soil is not tight or solid, it will form a hanging space. Therefore, when big seedlings are in into the pit, they should be filled and compacted until the pit mouth is filled, and the pit soil is dense and loose. No matter whether it is cloudy or sunny, planting camphor trees should be watered once in time. In dry and insolated weather, it needs to be watered once every 7 days for 3 ~ 4 days. Changsha Jin Hui Nursery is useful to you, please order some for me!

Question 9: How many kinds of camphor trees are there? What should we pay attention to in practice? Give 40 points. Thank you!

Cinnamomum camphora is divided into camphor tree and camphor tree.

According to the garden use, it can be divided into cutting Cinnamomum camphora, skeleton Cinnamomum camphora, full crown Cinnamomum camphora, multi-stem Cinnamomum camphora, cluster Cinnamomum camphora and other varieties.

1. Plant in time. Pruned camphor tree seedlings should be planted immediately, and wet grass and transpiration inhibitor should be used for those with long transportation distance.

2. Pit requirements. The hole should be large enough and clean. The bottom of the hole should be filled with the original excavated soil or fine soil cushion to the top of the hole for many times, and cofferdam should be built around the seedlings.

Water it. After planting, the plants should be irrigated immediately, and the soil around the tree hole should be stirred to make the soil fill the tree hole. In order to improve the survival rate of trees after planting, chemicals such as Shugenbao and survival solution of transplanted trees can be added to the water to improve the activity of root hair cells and the growth of new roots.

(1) Planting time:

Generally, it is planted from mid-March to mid-April, and spring buds will germinate. Replanting can be done in the rainy season. September is suitable for autumn. Winter plants can also be planted in places with less frost or more rainfall in winter.

(2) Planting method:

① The depth, length and width of the planting pit should reach 50 ~ 60 cm. Planting depth should be equal to the root diameter of Cinnamomum camphora seedlings. When planting, the mulch soil should be closely connected with the hole soil, and the hanging space will be formed if the soil is not tight.

(2) No matter whether it is cloudy or sunny, camphor trees should be watered once in time. In dry and exposed weather, it should be irrigated once every 7 days or so. 3 ~ 4 times in a row.

Transplant method

(1) Cutting roots and promoting roots For saplings with DBH below 10 cm, just dig the earth balls and transplant them according to the routine requirements. Usually, the diameter of the soil ball is about 5-6 times that of the trunk of the transplanted tree. For large saplings with DBH above 10 cm, root cutting and root promotion should be carried out first. The specific method is: dig a ditch on the opposite sides of the trunk, and the diameter of the ditch is 2-2.5 times the diameter of the trunk. Use a saw or a sharp axe to saw off the thick lateral roots, and the cross section must be uniform. Smaller lateral roots can be cut off by pruning shears, and then covered with fine soil, so that fine roots can grow near the fracture in the current year, and the two sides of unbroken roots can be repeatedly operated in the second year, and seedlings can be raised in the spring of the third year.

(2) For smaller young trees, Ap 1 -2-year-old young trees do not need to be cut off, and 3 16-year-old young trees should be cut off according to 1/3. Under normal circumstances, all the lateral branches at the lower part of the trunk should be cut off, the upper 2/3 lateral branches should be cut off in layers, and all the larger young trees should be cut off. Usually, the height of the trunk of street trees is controlled at 3-3.5 meters, and the thick lateral branches are kept at 0.3-0.5 meters. After cutting, seal the section with wax or wrap it with plastic film to prevent water loss.

(3) The best time for pilling, seed dressing, seedling raising and transplanting is March. The soil ball should be 5-6 times the diameter at breast height (seedlings can be 30-40 cm) and wrapped with straw rope to ensure that the soil ball does not come loose.

(4) The diameter of the transplanting hole should be greater than 1/3 of the soil ball of Cinnamomum camphora, the depth should be the soil ball, and the roots should be flush with the ground. L after the tree is planted, fill the gap with fine soil and tamp it with a thick stick. When it is short 10-20 cm, water it, let it absorb water, and then fill in the remaining soil until the base of the trunk becomes steamed bread.

control of insect

Cinnamomum camphora is the most common greening tree species in South China, with majestic tree posture, bright spring leaves, narrowest branches and leaves, and shade everywhere. It is widely used as shade trees and street trees, and can also be used to build scenic forests and shelter forests. Here is a brief introduction to the prevention and control of pests and diseases:

1. Powdery Mildew: This disease mostly occurs in nursery seedlings. When the temperature is high and humidity is high, the seedlings are too dense. It is most likely to happen in poor ventilation. Gray-brown spots appeared near the main vein on the back of tender leaves, and then spread all over the back of leaves, and a layer of white powder appeared, and there were also white powder on serious tender branches and stems.

1, nursery should always pay attention to environmental sanitation and properly sparse seedlings; Or if a few diseased plants are found, they should be pulled out or burned immediately.

2. When it happens, spray the lime-sulfur mixture with Baume of 0.3-0.5 degrees every 10 for three or four times continuously.

2. Black spot disease: It is easy to occur when camphor tree seeds grow 1-4 leaves after germination. From the tip of the seedling to the root, it turned dark brown and died.

Disinfect seeds, soil and mulch when sowing. When the disease occurs, the burned seedlings should be pulled out first and sprayed with 0.5% potassium permanganate or formalin for two or three times to prevent the spread.

Third, the camphor sawfly: it occurs for many generations a year and has a long damage period. 1 year-old seedlings were seriously damaged and died. After afforestation, the young leaves in the upper part of the crown are often eaten up, which seriously affects the growth of trees.

0.5 kg of Flos rhododendri mollis or tripterygium wilfordii powder and 75- 100 kg of clear water can be used to spray the seedlings, or 90% trichlorfon can be used. & gt

Question 10: What size camphor tree has a high survival rate? Hehe, no matter how big a tree can be transplanted, the key is to see what skills the transplanted person has.