Transplantation of Picea koraiensis trees
Red spruce, alias tiger tail pine, Korean spruce, etc., is an evergreen tree of Pinaceae spruce. Originating in Northeast China and Korea, it is widely planted in Beijing and Qingdao, as well as in Northwest China. The tree species has graceful posture, steeple-shaped crown, spreading or slightly oblique branches, strong adaptability, shallow root distribution, well-developed lateral roots, and easy to survive after transplantation.
I. Transplant time
Spring is the best way to transplant big trees. Under the condition of perfect technical measures, the survival rate can reach more than 98% after transplantation in late November and late May.
II. Preparation for transplantation
1. Planting hole, according to the size of the soil ball of the planted trees, the diameter of the tree hole is increased by 40 to 100 cm on the basis of the size of the soil ball, and the depth is deepened by 20 to 40 cm. The planting soil is better in neutral and slightly acidic soil rich in organic matter, and the bad soil quality should be improved.
2. According to the seedling standard, it is better to choose nursery seedlings with strong plants, plump tree shape, no diseases and insect pests and mechanical damage.
3. Before digging seedlings, the tree crown should be sprayed with anti-transpiration agent, and the crown should be properly tied up with grass rope. Remove the rootless topsoil and covered leaves, take the trunk as the center, draw a circle with 4 to 5 times of the dry diameter as the radius, dig vertically from outside the line to the height of the soil ball, repair and smooth the shoulder of the ball with iron milling, and gradually shrink inward to half the height of the ball, so that the ball is oblate; the fine root is shoveled with sharp milling, and the coarse root is sawed and cut to avoid shaking the ball.
4. After the earth ball is lifted, the grass rope which has been wet in advance is used for winding, binding and packing. The oversized earth ball can be packed in wooden cases, waiting for transportation.
3. Planting
1. Before planting, the planting soil should be backfilled so that the middle is slightly higher than around, and the backfilling height should be 5 cm lower than the surface after the soil ball is put in.
2. Planting, gently put the seedling soil ball into the tree hole, erect the straight tree with good adjustment of the main viewing surface, remove the packaging, then adjust the tree body, layer-by-layer backfill the planting soil, and stand up the tree support.
3. Water and use soil as a water-retaining Weir after planting. The water-retaining Weir should be large and firm enough to prevent leakage. The planting was watered three times a week, and the first time within 24 hours after planting. Check the support situation in time after watering and find that the trees are askew or the support is loose and righted and strengthened in time.
IV. Maintenance
Timely replenish water according to weather conditions and soil moisture, foliar water supply should be carried out for transplanting in the midsummer season; foliar topdressing should be carried out regularly; timely inspection of wind and rain weather should be carried out; timely support and reinforcement should be carried out when trees are found to be skewed and the support is loose. regular spraying of pesticides to prevent the occurrence of diseases and insect pests.
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Seed collection, budding and seedling raising techniques of Picea koraiensis
Red skin spruce (PiceakoraiensisNakai), alias red skin smelly and white pine, is an important timber forest tree species and landscaping tree species in China. It is mainly distributed in Xiaoxing'an Mountains, Zhang Guangcai Mountains and Changbai Mountains, and a small amount is also distributed along the river valleys in the east and north of Daxing'an Mountains. 1 Biological characteristics and economic value of Picea koraiensis is a large evergreen tree with dense branches and leaves, strong shade and cold tolerance, slightly saline-alkali and drought tolerance. It is a shallow-rooted tree species, which is easy to be blown down by the wind and has a higher requirement for soil quality.
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Picea koraiensis: management techniques at seedling stage
(1) shading: red spruce seedlings like shade and dampness. after the seedlings are unearthed, the seedling preservation rate of proper shading is 30% 40% higher than that of full-light seedlings, the seedling height increases by 32%, and the tender leaves are bright green. Generally, when 50% of the seedlings emerge, they begin to set up day-covering curtains to cover the shade until they are removed in the early and middle of July. If it is difficult to cover and obtain materials, you can also plant tall crops (such as corn) along the bed instead of Reed curtains. In some areas, there are sufficient water sources and convenient irrigation. Watering with a small amount of water 2 or 4 times a day and mastering timely and appropriate watering can also make full-light seedling cultivation successful. (2) topdressing
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