1. Scion Collection. To ensure successful grafting, it's essential to select a healthy mother tree from the seed orchard that exhibits strong growth and high seed production. Collect scions in mid-March to early April of the grafting year, before the sap starts flowing. Focus on collecting 2-3-year-old branches or vigorous one-year-old shoots. The diameter of the scion should be approximately 8 mm. Avoid overharvesting; limit collection to 15-20 shoots per tree to protect the health of the mother tree. After collection, wrap the scions in moist paper or store them in a pit. For long-term storage, use a rural vegetable cellar. Place about 50 cm of ice at the bottom of the cellar, then insert the scions and seal the entrance tightly to maintain a temperature below -5°C.
2. Grafting Time. Pine grafting is best performed between mid-May and early June, when the new shoots are actively growing. This period ensures optimal conditions for successful union between the scion and rootstock.
3. Grafting Technique. Choose young plantation forests that are at least 2 years old, with 4-6 years being ideal. Once the scions are taken out of storage, trim them to a length of 9-10 cm, ensuring they have a full top bud, are not dried out, and retain all their needles. Carry the scions in a container and keep them moist during transport to prevent exposure to sunlight or air drying, which can reduce survival rates. The scion and rootstock should be similar in thickness, with the scion being at least two-thirds as thick as the rootstock.
Use a wedge cut that is 1.5-2 cm long, making sure to do it in one smooth motion without repeating. After cutting the scion, prepare the rootstock by removing the apical shoots within 5 cm of the top. Cut the base of the bud flat, 2 mm above the bud, and then make a vertical cut along the pith of the rootstock, slightly longer than the wedge. Insert the scion into the cut surface of the rootstock so that the cambium layers align. Secure the graft with plastic tape, leaving the top bud exposed while ensuring the area is waterproof and windproof.
4. Key Considerations. Avoid cutting any lateral buds around the rootstock during the grafting process. After grafting, the scion may be damaged due to environmental factors, animal activity, or drought. If this happens, the main branch of the rootstock will no longer be suitable for grafting, but lateral branches with good growth can be used in the following year. When using lateral branches as rootstock, assess their growth potential and consider using fruit materials to promote development or cultivation.
5. Post-Grafting Care. Prevent animals from entering the forest after grafting. After 90 days, remove the plastic bandages and prune the side buds of the rootstock. If the rootstock’s lateral branches grow faster than the scion, perform annual spring pruning to remove competing buds and encourage the growth of the main scion branch. After the graft has fully established, continue with strong pruning practices to support healthy development.
Sensory Organs,Larynx Medical Model,Auditory Ossicles Model,Human Ear Anatomy Model
Yinchuan Erxin Technology Co., LTD , https://www.exmedmodel.com