Sakura (Prunusserrulata Lindl) is a deciduous tree of the genus Rosaceae, 5 to 25 cm in height, composed of 3 to 5 flowers, corymbose or racemes, white, pink single or double petals, leaves in the same flower, or anterior and posterior. April-May. When the flowers bloom in spring, the trees are full of flowers and flowers. Generally, cherry blossoms are mainly grafted and multiplied, and single-sakura cherry or cherry rootstocks are used as rootstocks for flowering in early spring. In recent years, we conducted trials on the cutting propagation of cherry shoots. The results showed that the average rooting rate was above 95% within 25 days after cutting. The maximum rooting of individual plants was 20 and most of them were cortical roots and callus roots. More than 90% are now introducing their technology as follows. 1 Clipping and Handling In the first half of June to mid-September, we collected the semi-lignified shoots that germinated in the same year and cut into 10 to 15 cm long branches. Each of the branches retained the top two to three leaves. The remaining leaves together with the petiole were removed and the cuttings were cut under the cutting edge. Flat cutting requires a flat surface. The bundles of 50 or 100 bundles are cut into thin strips in a cool, damp place. The base of the cuttings is approximately 3 to 4 cm in diameter. ABT rooting powder No. 1 (developed by the ABT Research Center of Chinese Academy of Forestry) has a concentration of 50 mg/L. Soak for 5~8h or soak in solution with concentration of 100mg/L for 2~4h. 2 cutting method and post-insertion management 2.1 slotting settings Choose a cool, easy-to-drain area with a height of 70-90cm for a small plastic arch shed of 1.2-1.5m in length and 5.0-6.0m in length. The slag with a depth of about 10 cm at the bottom and a depth of about 10 cm is then spread on the slag. The expanded perlite or green sand with a thickness of about 10 cm is poured as the cutting substrate. 2.2 Cutting The cuttings were planted in the cutting bed with 3 cm spacing and 5 cm spacing. (It is advisable that the cutting blades do not overlap each other). In the cutting process, first, a short wood braze slightly thicker than the cutting insert is used to drill the hole, and then the cutting insert is placed in the hole to compact the matrix around the cutting insert so that the substrate and the cutting insert are in close contact with a cutting depth of 4 to 5 cm. 2.3 Post-insert Management Immediately after the cuttings, cover with water and cover the film. The relative humidity of the film should be kept above 95%. Afterwards, apply clean water once a day in the morning. The temperature in the arch shed should be maintained at about 30°C. If the temperature exceeds 35°C, the temperature of the substrate can be lowered by about 25°C. In the initial stage of cutting, the amount of watering should be larger, and then the amount of watering should be gradually reduced. When cuttings begin to take root (usually about 15 days after cutting), ventilation can be properly performed sooner or later, then gradually increase the amount of ventilation to extend the ventilation time. When the root length of the cutting plug reaches 3 to 5 cm, 3 to 5 roots per cutting can be transplanted. 3 transplanting Before the transplanting, the shed film was gradually opened and the seedlings were gradually opened for about 7 days and the watering amount was reduced. When transplanting, the cutting seedlings that have been exercised are moved directly to Daejeon. Immediately irrigated with water. Shade the net for a few days to avoid exposure. Can also be moved into the nutrient bowl (culture soil requires good permeability) and put it into a small shed to be covered with water to cover the shed film. Moisturizing and shading starts at the beginning of each day, and ventilation is started every morning and evening. After 2 to 3 days, the ventilation volume is gradually increased to open after 10 days. Remove the shade from the shed film and re-enforcing the seedlings for 4 to 5 days before moving into Daejeon.
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