How to plant Cedrela sinensis seedlings: a brief description of the planting method for Cedrela sinensis seedlings.

How to plant camphor seedlingsThe editor answers how to plant camphor seedlings and briefly describes the planting methods of camphor seedlings, please read on!There are two methods of propagation for camphor:播种繁殖 (播种 propagation) and cutting propagation. Adapted to altitudes below 1800m, absolute minimum temperature: -0.00°C. Camphor trees prefer light and are slightly shade-tolerant; they thrive in warm and humid climates, have weak cold resistance, are not strict about soil requirements, and the best soil is fertile and permeable sandy soil. They are relatively tolerant to moisture but not to drought, poor soil, and saline-alkali soil. They have a well-developed main root, deep roots, and are wind-resistant. They have strong germination power and are tolerant to pruning. Growth rate is moderate, tree shape is huge like an umbrella, providing shade and cooling. They have a long lifespan, can grow into thousands of years old towering trees, and have strong abilities to smoke and dust, conserve water sources, stabilize soil and prevent sand, and beautify the environment! In addition, they are resistant to tidal winds, smoke, and toxic gases, and can absorb various toxic gases, making them adaptable to urban environments.To ensure the survival rate of planting, the following issues should be noted and corresponding technical measures should be taken during the planting process.I. Planting cultivation1. Planting TimeGenerally, from mid-March to mid-April, before the spring buds start to sprout. In the plum rain season, supplementary planting can be done. September is suitable for autumn planting. In areas with few frosts or more rainfall in winter, winter planting is also possible. Planting should be timely, that is, the pruned camphor seedlings should be planted immediately. If the transportation distance is long, the rootstock should be wrapped with wet grass and plastic film to keep it moist. The best planting time is before 11 am or after 4 pm, and in winter, just avoid the coldest days.2. PlantingThe planting holes should be dug according to general technical procedures, with a depth, length, and width of 50-60 centimeters. The bottom of the hole should be fertilized and covered with a thin layer of soil. The planting soil should be loose and fertile. Remove the wrapping from the camphor seedlings, and the planting depth should be such that the ground is level with the root collar of the camphor seedlings. When planting, the protective soil should be tightly connected with the hole soil, and loose or unconsolidated backfill will cause voids. After planting the seedlings upright in the hole and filling the soil, firmly tamp the soil and continue filling until the top of the hole. Finally, make a water-retaining barrier around the seedlings.3. WateringAfter the camphor seedlings are planted, water them immediately. For seedlings with soil balls, stir the soil around the planting hole with an iron rod or wooden rod while watering to fill the soil around the hole with water. When watering, be careful not to damage the soil barrier, and fill the soil barrier with water, allowing the water to slowly seep into the planting hole. To further improve the survival rate of planting, a growth hormone can be added to the water to stimulate new root growth. Naa is usually used as the growth hormone, dissolved in a small amount of alcohol first, then mixed into water to make a 200PPm solution for the first watering.4. Special technical treatmentDuring the transplanting process, to maintain the humidity of the trunk and reduce the moisture evaporation from the bark, wrap the trunk with wet grass rope until the top of the main trunk, and if the branches are large, wrap them as well. Then, cover the grass rope-wrapped trunk thickly with clay slurry. afterward, spray water on the trunk with a sprayer to keep it moist. After digging up the large camphor, prune the broken, damaged, and withered roots, and then dip them in clay slurry; if 0.03% Naa growth hormone is added to the slurry, it can promote the growth of new roots after transplanting the large camphor.5. Management and maintenanceSince planting camphor trees in an unsuitable off-season, it is even more important to strengthen maintenance management after planting. Normally, pay attention to watering, adhere to the principle of "water when dry, water thoroughly when watering," and often spray clean water on the ground and leaves of the camphor trees to increase air humidity and reduce plant transpiration.II. Transplanting methods1. Root pruning to promote root growthFor seedlings with a trunk diameter of less than 10 centimeters, just dig the soil ball according to the usual requirements for transplanting. The diameter of the soil ball is usually about 5-6 times the diameter of the main trunk. For larger trees with a trunk diameter of more than 10 centimeters, root pruning and root promotion treatment should be performed first.2. Trunk cutting and branch reductionFor smaller seedlings, no pruning is required for 1-2-year-old seedlings, 1/3 of the branches should be pruned for 3-6-year-old seedlings, usually pruning the lateral branches in the lower 1/3 of the main trunk and the upper 2/3 in layers, and for larger seedlings, pruning should be comprehensive. The main stem height of street trees is usually controlled at 3-3.5 meters, with thick lateral branches retained at 0.3-0.5 meters. After cutting, the cut surfaces should be sealed with wax or wrapped with plastic film to prevent moisture loss.3. Ball lifting and wrappingThe best time for lifting the ball and transplanting is March. The soil ball should be 5-6 times the diameter of the chest (30-40 centimeters for small seedlings) and wrapped with grass rope to ensure the soil ball does not disintegrate.4. TransplantingThe diameter of the planting hole should be larger than 1/3 of the camphor soil ball, and the depth should be such that the root茎 is level with the ground. After planting the tree, fill the gaps with fine soil and tamp it down with a thick stick. When there are 10-20 centimeters left, water it to absorb moisture, then fill the remaining soil until the base of the trunk is dome-shaped.III. Pest controlCamphor trees have a majestic appearance, colorful spring leaves, and dense foliage, making them the most common绿化树种 (greening trees) in the south, widely used as courtyard shade trees, street trees, and for creating scenic and protective forests. Here is a brief introduction to the prevention and control of their diseases and pests:1. Powdery mildewThis disease often occurs on seedlings in nursery beds under conditions of high temperature, humidity, dense seedlings, and poor ventilation.2. Black spot diseaseThis disease easily occurs when the camphor seeds germinate and grow 1-4 leaves. The seedlings turn black and brown from the tip to the root and die.3. Camphor leaf蜂 (wasp)It occurs in multiple generations throughout the year and causes severe damage to 1-year-old seedlings, leading to withering and even death.4. Camphor shoot roller蛾It occurs in several generations a year and larvae bore into the shoots, affecting the tree's height growth and causing the trunk to bend.5. Camphor fruit borerIt usually affects young trees and trees under 20 years old, with two generations per year.6. Camphor longicorn beetleDuring the adult laying period (May to June), use a wire brush to brush the egg scars and刺 (stab) the eggs or newly hatched larvae.剪除 (Prune) the damaged branches and inject insecticides such as dichlorvos into the holes to kill the larvae.The above introduces how to plant camphor seedlings and briefly describes the planting methods of camphor seedlings for reference.