Magnolia is a variety of white flowers in magnolia. Also known as Mulan, Magnolia, etc. Magnolia deciduous trees, the height of the tree is generally 2-4 meters or as high as 15 meters. Flowers white, large, aromatic, open first, flowering period of about 10 days. China's famous flowers and trees, important flower-viewing trees in the early spring in the north, and Shanghai city flowers, have a cultivation history of about 2,500 years, and are valuable ornamental trees in the garden. It is native to the central provinces of China and is now cultivated south of Beijing and the Yellow River Basin. In ancient times, it was planted in front of pavilions, terraces, buildings and pavilions. It is now more common in gardens, factories and mines, sowing, scattered, or on both sides of the road as a street tree. There are also potted plants in the north. It has been introduced and cultivated all over the world.
Magnolia seedlings grow very fast, in order to rationally use the land, shorten the time as a grafting rootstock, avoid the waste caused by the seedlings, can be transplanted during the seedling period, and promote the growth of the lateral roots and fibrous roots of the seedlings through transplantation. After the transplanted Magnolia in the same year, the next year can be used as a rootstock to directly graft the varieties such as Magnolia or Magnolia, which shortens the time for cultivating the rootstock and prevents the occurrence of blight. The specific operations are as follows:
1. Transplant preparation: Deeply renovate in autumn and winter, and make 1 to 1.5 m of bed in Hunchun. Fertilization and weeding are carried out during the preparation to ensure the growth of seedlings after transplantation.
2, transplantation time: suitable for transplanting time when the seedlings are grown after 2 to 3 true leaves, the survival rate is higher, up to 95%, the transplanting work should be carried out in the rainy days, watering each morning and evening, Shade properly when the sun is too strong. According to the climatic conditions of Jigong Mountain, it is generally better to carry out transplantation in mid-May.
3, seedling: 1 to 2 days before the seedlings, if the weather is dry, the soil is knotted, the transplanted seedlings need to be watered, once a day. When starting the seedlings, in order to not damage the root system, when the soil is more knotted, insert a small shovel (2 to 3 cm wide) into the soil at 45 degrees to help loosen the soil. The seedlings are then lifted up until the roots are completely raised.
4. Colonization: The planting pit can be temporarily excavated with a small shovel during transplanting. The seedlings are placed in a positive position, and the roots are buried in the soil 1 to 2 cm, and the soil is squeezed by hand and then watered.
5. Management: After the seedlings are planted, if there is more rainfall, no watering is needed. If the weather is dry and dry, pour water every 3 to 5 days. After 100 days of seedling transplanting, foliar fertilizer or urea or potassium fertilizer can be sprayed in late August to promote vegetative growth.
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Lower Limb Locking plate is a kind of implant fracture orthopedics with locking thread holes.
The lower limb locking plate allows the bone to bind to the plate more firmly, so that the reduced limb is more stable. Locking plates were first used in spine and maxillofacial surgery 20 years ago to stabilize fractures while reducing extensive dissection and damage to soft tissues. When the threaded hole in the locking plate is screwed in by a screw with a threaded head, the plate becomes an Angle fixing device. It can have both locking and non-locking holes for different screws to be screwed in. Any plate that can be screwed into an Angle fixed (stable) screw or bolt is essentially a locking plate.
Locking plate system does not rely on bone friction to achieve connection, but completely depends on the interlocking structure of the plate itself. A certain gap between the plate and the bone surface can be left, which can eliminate the adverse effect of heavy pressure contact between the plate and bone, and greatly improve the blood supply and the growth and recovery of the periosteum. The main biomechanical difference from conventional plates is that the latter relies on friction at the bone-plate interface to accomplish plate compression on bone. Stability is maintained by an angularly stable interface between the screw and the plate. Because the locking internal fixator has a stable integrity, the pull-out force of the locking screw is much higher than that of the ordinary screw. It is difficult for a single screw to be pulled out or broken unless all the surrounding screws are pulled out or broken.
Locking Plate,Femur Plate,fibula plate,tibia plate
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