Walnut is a kind of dried fruit. It is relatively easy to cultivate, manage and store fresh fruit rather than fresh fruit, and it also saves labor, and it does not cause damage to ostrich birds. In particular, fruit growers in the Beijing suburbs have set off a walnut plantation in recent years.

Although the history of cultivation of walnuts on the outskirts of Beijing is very long, most of the walnuts are planted on ravines, river banks, roadsides, dams, and grounds. The fruit growers generally adopt extensive management, and they are allowed to grow naturally after they are dried, and the trees are disordered. Closed, severe dry branches, and low yields. According to statistics from the Fruit and Tree Department of the Municipal Landscaping Bureau, the average yield per mu of mountain walnuts is only 31.5 kg, which is less than one-tenth of the output of normal acres. To increase the output per unit area, the primary management work is to strengthen fertilizer and water management, pest control, and proper pruning, while plastic pruning is a weak link in the management technology of the rural suburbs of Beijing.

When should the walnuts be pruned: Generally, the winter cuts of the fruit trees are in dormant period and the nutrients of the shoots are returned to the dry and root storage period. In the period of walnut trimming, it is easy to produce wounds, affect the tree vigor, and the wounds should not heal. It even caused the death of the plant. After pruning in the spring, the pruning will not hurt the flow, but the loss of nutrients will also affect the tree vigor. The correct period of pruning is the most suitable for the postharvest white dew to the autumnal section.

How to trim walnuts: Although the history of cultivation of walnuts in the suburbs of Beijing is very long, but the experience of the fruit farmers to accumulate walnut plastic trim is inadequate. To trim walnuts you must understand the habit of growing walnuts. Walnuts are very dry, and they should pass through 4-5 years of trunk sparse formation after planting. The results of walnuts are early, and most of the second year of colonization can begin. The flower buds of walnut are different from general fruit trees. The flower buds are divided into female and male, and the female flower buds are mixed buds. The buds are planted at the top of the shoots and 1-2 buds under the top buds. After germination, they have both long branches and leaves, and flowering results. Male flower buds are pure flower buds and lateral. Therefore, except for the promotion of its branches, it cannot generally be shortened, otherwise it will affect the results. Therefore, the walnut pruning method should be based on sparse shearing, supplemented by short cuts. Since most of the pith of walnut branches are prone to loss of water, the improper cutting of the cuts often results in the weak growth of the cut-out buds, and the short cuts should leave long bracts.

In addition, most of the adult walnut trees in the suburbs of Beijing are disturbed by trees, with severe baldness, sparse branches, dense peripheral branches, and thin and dry branches. When pruning, pruning should first remove some of the large branches with severe baldness, but it is not advisable to remove large branches once. It is better to gradually remove the dense branches of bare trees after two to three years. Secondly, weeds should be removed from dry and dead branches, pests and branches, and then we must trim the cross-branches, parallel-branches, over-closed branches and peripheral branches, and shred thin and thin branches to make the interior of the tree body airy and transparent. At the same time, the branches of sparsely populated parts should be shorted. Cut, promote its hair, to achieve the purpose of three-dimensional results.

Another characteristic of adult walnut trees is that the growth potential of the shoots will become weaker along with the higher branches, resulting in a decrease in the ability and an increase in the dryness rate. The branches should be trimmed as much as possible each year to minimize the number of branches. Within the scope of the 4th grade, it is advisable to not exceed 5 grades, so as to maintain a balance between vigorous growth, growth and results, and achieve high yield and stable yield.

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