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Milan is a kind of evergreen leaf, flower, and fragrant flowers, with strong ornamental value. Indoor and outdoor can be cultivated and easy to manage, so it is widely used in landscaping and is loved by flower lovers. However, there are certain difficulties in the reproduction of Milan, especially the low survival rate of cuttings, which makes many flower lovers' desire to cultivate Milan themselves impossible. This article describes a simple, practical Milan breeding technology - high pressure reproduction for your reference. (a) Preparation before high pressure 1. Select the appropriate time. It can be carried out every year from March to August. During the 20 days before the high pressure, the Milan trees were fertilized and fertilized to make the plants grow vigorously. In case of dry and hot weather, irrigation should be done 4 to 5 times after fertilization to ensure that the plant has sufficient moisture and is conducive to high pressure propagation. 2. The required materials and tools. Prepare a suitable amount of moss, lashing ropes (about 40cm in length), plastic microfilm strips (40cm in length and 20cm in width) according to the number of high-pressure Milanese, and prepare sharp girdling or grafting knives, branches and syringes. (b) The high-pressure technology is selected to be carried out on a sunny or cloudy day. Rainy days are generally not carried out. First, the moss is soaked in water for 1 hour. The rooting powder can also be added to the water, and the moss is removed after soaking. Choose a strong, strong growth, good tree shape, girdling on the branches 0.5 ~ 2.0cm in diameter, circumcision width 1.5 ~ 2.5cm; at the same time with a grafting knife scrape the ring to form a layer, make it Broken to facilitate the rooting of new plants. After girdling, some branches are trimmed with branches according to the shape of the tree and operation. Moss is covered with a plastic microfilm (the humidity of the moss is preferably not dripping by hand pressure), and is tied in the ring. Be sure to wrap the ring in the middle of the moss so that the ring is completely dark. At the same time, the micro-membrane is tightly bound and sealed. The number of high pressures can be determined according to the tree shape and growth potential, ranging from a few to several dozens. (III) Care management after high pressure 1. Pest control. After the high pressure, the vigor is weak and vulnerable to insect pests such as scale insects and red spiders. It can be used to kill 600 to 800 times of liquid, 500 to 800 times of rapid culling, and 600 to 800 times of 50% of carbendazim. Prevention. 2. Fertilizer management. After the high pressure, the fertilizer and water management should be strengthened. 0.1-0.2kg of compound fertilizer should be applied to each tree and irrigation should be carried out at any time to ensure the nutrient and water supply of the tree. Alternatively, 0.2% to 0.5% of potassium dihydrogen phosphate solution can be sprayed on the leaves. Or urea solution. In case of dry and hot weather, the moisture content of the high-pressure substrate should always be observed, and water should be added to the entrapped substrate at any time with a syringe. The substrate is suitable for moist, but water can not be accumulated. 3. Trim transplants. The roots of the new plants can be grown 20 to 25 days after the high pressure. Plants with well-grown roots should be transplanted under pruning. Different cultivation methods such as bagging, potting, and planting can be selected as needed. Using high-pressure methods to breed Milan can greatly increase its propagation coefficient, and the survival rate can reach more than 95%; at the same time, the survival rate of transplanting new plants can reach more than 90%. Therefore, this technology is simple, practical and effective, and is particularly suitable for medium and small-scale Milan breeding. In the case of sufficient mother trees, large-scale Milan breeding can also be carried out. Author: Xia Jiangwen Ren Junmei Unit: Sichuan Liangshan Subtropical Crops Research Institute