Plugging method. When grafting, the first true leaf development period of the rootstock is the best, and the grafting time can be maintained for 8-10 days after 6-8 days after the emergence of the rootstock. The watermelon scion is suitable for the cotyledon to be unfolded. Prepare a bamboo stick before grafting. The thickness is equal to or slightly thicker than the watermelon seedling, and the front end is cut into a wedge-shaped surface. When grafting, the growth point of the rootstock seedlings is removed first, and then the tip end of the bamboo stick is inserted in a direction parallel to the cotyledons from the growth point to the depth of about 1 cm, so that the tip of the bamboo stick just exposes the rootstock. Then, the scion was cut into a wedge-shaped surface 1 cm below the cotyledon with a blade, and the length was about 1 cm. The bamboo stick was pulled out, and the scion was inserted into the hole, and the tip slightly exposed the rootstock. Spraying a new high-fat film in the seam of the ear can prevent oxidation, prevent invasion of pathogens, and increase survival rate.
The docking method. The scion was pulled out from the seedling tray, and a 1 cm incision was made from the top and bottom with a blade 1 cm below the root of the rootstock, the depth of the incision was 95% of the diameter of the root axis of the rootstock, and the scion was 2 cm below the cotyledon. Cut the incision about 1 cm long, then insert the tongue into the shape, bundle it with plastic strips or clip it with a grafting clip, then dig a small pit in the nutrient bowl of the rootstock and bury the scion in the soil. water. For the grafting cultivation of watermelon, gourd can be used as the rootstock, and the rootstock and the scion can be sown at the same time by the docking method.
Seedbed management. After the grafting, the seedbed should be strengthened to obtain the best survival rate: to keep warm, the suitable temperature for grafting seedling healing is 20-28 °C, the temperature of the seedbed must be checked frequently, and the temperature at noon during the day is not higher than 28 °C, and the nighttime is not lower than 20 ° C; moisturizing, grafted seedlings can not get the water absorbed by the roots of the rootstock before the healing, the scion is easily wilted. Therefore, 100% of the relative humidity of the air should be maintained within 3 days after grafting, that is, the ground water is poured after the connection, and the water droplets on the membrane surface are kept. It can be gradually ventilated in 3 days, and 1-2 times a day, in the morning and evening, after 1 week. The shed film is opened a little, and the wind is cooled; the shading is strictly shading within 2 days after grafting, and the glare can be blocked after 2 days, and the light is gradually seen. After 1 week, there is no need to shading; pay attention to water control, watermelon is not wet, and the seedling period is generally not Watering is not topdressing. If the seedbed is too dry, you can pour small water at noon on sunny days. When the fertilizer is lacking, spray the urea + photosynthetic nutrient film fertilizer to improve the absorption of fertilizer efficiency.
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Total knee replacement is for patients with severe pain and/or severe joint disability due to osteoarthritis, post-traumatic arthritis, rheumatoid arthritis, or previous implant failure.
The total knee joint system consists of femoral condylar , tibial tray,tibial insert and patella.The femoral condylar and tibia tray are made of Co-Cr-Mo in accordance with the quality standards.Tibial insert and patella are made of UHMWPE containing PBHP antioxidants.
The revision knee system is suitable for cemented total knee replacement in patients with severe joint pain or severe disability due to osteoarthritis, post-traumatic arthritis, or rheumatoid arthritis, moderate knee varus, varus, or flexion deformity of the knee, avascular necrosis of the femoral condyle, previous failed knee replacement, osteotomy, or other knee surgery.
Total knee arthroplasty (TKA) is a practical and effective method for the treatment of serious knee arthropathy. However, attention should be paid to the selection of indications, the correction of joint internal and external inversion and flexion deformity, and the correct placement of tibial prosthesis to reduce the loosening of tibial prosthesis. At the same time, early functional exercise should be carried out to reduce postoperative complications. Total knee arthroplasty (TKR) provides an effective treatment for patients with severe knee arthrosis.
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