The pruning of early-ripening walnut varieties is done at the young tree stage, mainly to cultivate the tree shape to prevent premature formation of small old trees. When the opening angle is at the same time, the stems of the backbone branches are appropriately truncated to promote their growth and make them grow as quickly as possible. Forming; for the early fruiting walnut, it should be shortened and retracted appropriately to maintain the growth potential of the branches and fruiting branches and extend the fruiting life. Late maturing varieties are more prosperous at the young tree stage, and the top buds are the main result. Therefore, at the young tree stage, it is necessary to lightly cut the long and open angle, increase the proportion of short and medium branches, and promote the early fruiting of more flowers; The trimming and trimming of the mid-late maturing varieties in the fruit period should pay attention to the opening angle, dredge too dense auxiliary cultivation, improve the ventilation and light transmission conditions of the tree body, and for the fruiting branches that have been continuously fruiting for many years, they should be appropriately retracted to maintain their robust growth potential. . After trimming, clean up in time, rub the anticorrosive film on the big wound, protect the growth of healing tissue, and prevent infection by bacteria.
After the soil is thawed, the germination water is poured once before the tree germinates to supplement the water lost in winter to promote the growth of new shoots and flower bud differentiation. At this time, watering can also reduce the ground temperature and delay the flowering period to avoid the harm of late frost. Spring fertilization is mainly based on top-up nitrogen fertilizer (urea).
Pest and disease control 1. Clean up the litter and weeds in the garden in time, and burn or fertilize intensively. 2. Spray 1000 times of general tree protection in the early spring to prevent frost and overwintering pathogen infection. 3. Strengthen the prevention and treatment of rot and ulcer. If harmful symptoms are found, use a razor blade to gently stroke the diseased skin (vibration can cause rotten diseased spores to fly), and use a brush to protect the general mother liquor of the tree, which can dry the diseased skin after 3 days, and be infected with dead spores within 30 days The diseased skin started to fall off.
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