The propagation of cherry blossoms is usually dominated by grafting, with single-flowered cherry or cherry rootstocks used for cutting or splicing before flowering in early spring. In recent years, the experimental results of cutting propagation of cherry shoots showed that the average rooting rate was above 95% within 25 days after cutting, and the number of rooting per plant was up to 20, and most of them were cortical roots and callus roots. The survival rate is above 90%. The cherry blossom tender cutting technique is introduced as follows:
Cutting and handling of cuttings From mid-June to mid-September, collect half-lignified twigs that germinate in the same year and cut into 10 cm to 15 cm long branches. Each culm retains the top 2 to 3 leaves. The remaining leaves were removed together with the petiole, and the cuts under the cuttings were cut with sharp blades, requiring that the cut surface be flat. Cut the cuttings into bundles of 50 or 100 sticks. Place the base of the cuttings approximately 3 to 4 cm in a cool, damp place. Soak for 5 hours in a solution of ABT rooting powder No. 1 at a concentration of 50 mg per liter. Soak for 2 to 4 hours in 8 hours or in a solution with a concentration of 100 mg per liter.
The cutting method and the post-insertion management are selected to cool and easy to drain. A small plastic shed with a width of 1.2 to 1.5 meters and a length of 5 to 6 meters is built. The height of the shed is 70 to 90 centimeters. At the bottom, first dig 25 cm, then pour slag with a thickness of about 10 cm, and then spread 10 cm of expanded perlite or green sand as a cutting matrix and drench the water.
Insert the cuttings by 3 cm spacing and 5 cm line spacing in the slotting machine (the cutting blades do not overlap each other). In the cutting process, first use a short wood braze slightly thicker than the cutting insert, then insert the cutting insert into the hole to compact the matrix around the cutting insert so that the substrate is in close contact with the cutting insert. The cutting depth is 4 cm to 5 cm.
Immediately after the cuttings, they are thoroughly sprayed with clean water, covered with a thick shed film, and the relative humidity is kept above 95%. Afterwards, apply clean water once a day in the morning. The temperature in the arch shed should be kept at about 30°C. If the temperature exceeds 35°C, the water temperature can be lowered and the temperature of the substrate is appropriate at 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), they can be properly ventilated sooner or later, and then gradually increase ventilation and prolong ventilation time. When the root length of the cutting insert reaches 3 cm to 5 cm, 3 to 5 roots per cutting can be transplanted.
Before transplanting, the shed film was gradually opened, and the seedlings were smelted for about 7 days, and the watering amount was reduced. When transplanting, the cutting seedlings that have been exercised will be moved directly into Daejeon. Immediately they will be soaked with water, shaded with shading nets for a few days, and avoid exposure. Can also be moved into the nutrients (culture soil requires good permeability), moved into a small shed, drenched water, cover the shed film, moisture shading a few days, began to ventilate sooner or later every day, 2 days to 3 days after Increase the amount of ventilation, open the shed film after 10 days, remove the shade, and then move to Daejeon after hardening for 4 days to 5 days.
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