First, the walnut seedlings should be bundled and placed into water for soaking. The water level should be higher than the roots but lower than the grafting site. Soak them for more than 12 hours to ensure the roots absorb enough moisture. This step is crucial for preparing the seedlings for successful transplantation.
Second, after the roots have absorbed sufficient water, dip the seedlings into ABT rooting powder diluted at a ratio of 1:2000 for 5 to 20 minutes. This treatment helps promote root development and significantly increases the survival rate of the seedlings once they are planted.
Third, when planting the walnut seedlings, it's important to prevent wind damage and moisture loss. Use a plastic film with a size of 90 square centimeters. First, level the ground, then two people should work together to cover the film. Make sure the center of the film is positioned over the seedling, flatten it evenly, and spread it out. Then, cover the roots and the base of the seedling with fine soil, pressing it tightly to secure the film in place and prevent it from being blown away by the wind.
Fourth, after the walnut seedlings are bagged and dried, wrap the tree trunk with a special protective bag to keep out pests such as beetles and leaf-eating insects. As temperatures rise, gradually ventilate the bag and remove it once the seedlings are acclimated to the environment.
Fifth, after applying polyvinyl alcohol (PVA) to the walnut trees, the entire tree should be uniformly coated. The tanning method involves mixing PVA with water in a 1:15 ratio. Begin by heating water to 50°C in a pot, then add the PVA slowly while stirring continuously. Avoid adding PVA before the water boils, as this may lead to incomplete dissolution and an uneven solution. Continue stirring until the mixture reaches a boil, then reduce the heat and simmer for 20 to 30 minutes. Let the solution cool slightly before use. This coating helps protect the tree from environmental stress and promotes healthy growth.
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