1. Planting Newly planted walnut trees in the year had a small root system, a shallow distribution, and no drought tolerance. Management was mainly to strengthen fertilizer and water management and increase the amount of shoot growth in the current year. Pruning is mainly combined with walnuts planted on the seedlings will be trimmed, set the height of 60 to 80 cm (mountain 80 cm, flat 60 cm), less than the height of the set, can be broken on the top buds, triggering branches. After the shoots are spread, the new shoots below 40 cm in diameter are removed, and 4 to 5 shoots can be kept above 40 cm. In the summer, the second branch of the tree was lightly plucked and the branches were fully developed. Remove the dense branches, branches and branches, and thin and weak branches when the winter cut, and the short branches with a length of less than 10 centimeters, take out the tree shape, and leave a short cut of 25 to 30 centimeters for the length of the main branch that is left longer than 30 centimeters.
2. Remove the young fruit in the second year of planting. Remove unused branches (secret, disease, insect, weak, short branches) during summer cutting, and select 3 to 4 bud topping hearts for the secondary branches drawn in June, except for the center stem. Leave 40 cm of branches for short cuts during winter cuts.
3. Plant the same year old tree in the third summer. When cutting in winter, the main branch should be cut to length (about 10 centimeters in length, no more than 10 centimeters in length) and left in the same position (long-distance release, generally leaving the whole buds full, mature branches). Block light branches, weak branches removed from the local. "Truncated" branches should be separated and scattered, so that the result of the distribution of branches is reasonable and there is no confusion.
4. After planting for three years, with the increase of the tree body, one branch (a result branch and one vegetative branch) can be properly selected in the upper part of the crown. In summer, branches with short branches will sprout at the site of thinning, and they should be removed in time. The appropriate position can be cultivated into a temporary result branch. For multiple shoots drawn after a short cut, one should choose to keep a suitable position and grow well to cultivate, and other sparse. Pay attention to controlling the growth of the secondary branches in the later period. When the length exceeds 3 meters, the heart can be plucked. During the winter cut, the branches of previous years' results were cut short to serve as the vegetative branches for the following year; the branches that had been placed for a long time in the past were left as the result of the next year. Every year, one branch is the result of this year, and it will be cultivated as a vegetative branch next year. This is true for branches and branches year after year. When the tree body shows a decrease in germination rate and branching force, the walnut seedlings must be planted in a timely manner in the tree row, and one plant should be planted between each two trees. When the newly planted tree enters the result period, the old tree is removed and the comprehensive management of the young tree is strengthened. The pruning method is the same as above. (
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