When is the best time to prune a walnut tree?

If the walnut tree is pruned after falling leaves, it is very easy to cause wounds and excessive wounds, and people are worried that it will cause loss of nutrients and water, which will hinder the normal growth and fruit. For a long time, walnut pruning in China is carried out after budding and leaf development (spring cutting) and after harvest to before falling leaves (autumn cutting). Through the comparative analysis of the effects of spring, autumn and winter shearing, Hebei Agricultural University concluded that although winter shearing had loss of wound flow, it was far less than the loss of photosynthetic products and leaf nutrients that had not yet returned to autumn shearing.

Spring shearing is carried out just after the establishment of new organs, and the loss of nutrients such as high respiratory consumption is higher. Therefore, from the perspective of nutrient loss, the loss of winter pruning is the least, which is the fundamental reason for the strong potential and high yield of winter pruning trees. However, as far as winter shearing is concerned, it is advisable to avoid the peak period of the previous injury (mid-to-late November to early December).

Therefore, the suitable time for walnut tree pruning is winter, and winter pruning is best completed before walnut bud germination in late March.

Walnut trees. The best time to prune is as follows:

Walnut pruning is best done after the walnut harvest and before the leaves turn yellow (mid-September to early November). This pruning will reduce the leaf area and affect the nutrient accumulation of the tree, which is suitable for adjusting the skeleton structure of the tree. At the same time, because the leaves have not fallen, it is easier to distinguish the over-dense branches and shading branches, and remove them, so as to facilitate ventilation and light transmission, and there is no damage to the flow at this time.

Walnut trees can be pruned all year round. The pruning period of walnut trees is different from other tree species. If the period is not appropriate, there will be a wound flow phenomenon, so that the tree nutrients are lost, resulting in the weakening of the tree, under normal circumstances, it is divided into dormant period and injury-free flow period pruning.

According to the growers' experiments for many years, pruning in different pruning periods in spring, summer, autumn and winter has different problems and different pruning effects.

Summer pruning must master the pruning period, after pruning if the temperature reaches 30, walnut fruit exposure, easy to cause burns, nutritional quality decline, thereby reducing the benefit. It has been observed that pruning is best from late May to the end of June.

Or in the winter when the number of nine cold days, this period due to the temperature difference between day and night is very small, the flow of injury is light, this period is generally 30 40 days, is in the slack season, the area is large and the technical staff of the walnut orchard should be pruned more in this period.

Walnut trees are pruned up to 2 times a year, always after the leaves have grown or before they have fallen leaves, preferably in June and September each year.

Why did you choose these two times? This is related to the growth characteristics of walnut trees.

1. Walnut trees begin to bear fruit in June. When the fruit is in the expansion stage, those branches that do not set fruit, bright branches, underground branches, competing branches and long branches should be cut off, otherwise too many nutrients will be consumed and the normal growth of the fruit will be affected. After pruning, it is necessary to spray insecticide, fungicidal agents and foliar fertilizer in time to prevent the occurrence of pests and diseases and promote the growth of the tree.

Second, the walnut fruit ripening harvest time is about mid-September. After the fruit is ripe and harvested, the tree consumes too much nutrients, and then it is necessary to reduce the burden on the fruit tree. Therefore, it is necessary to prune before the leaves fall, and the pruning at this time is mainly to cut off dry branches, diseased branches, old and weak branches, and pinch off the top tips of some vigorous branches, which can control the excessive growth of branches.

Note: After pruning, it is necessary to carry out a thorough cleaning of the garden, including cleaning the cut branches out of the orchard, spraying the corresponding fungicides and insecticides at the same time to prevent the occurrence of pests and diseases, and then combined with the autumn application of base fertilizer, cultivated land, etc., to lay a good foundation for the growth of walnut trees in the coming year.

Some people may also say, I think walnut trees are better pruned in winter, if you insist on this opinion, and do this, then there is no way, fruit tree pruning as a technology, may be benevolent, wise and wise. Good technology is also proven in continuous practice.

When pruning walnut trees in winter, it should be adjusted according to the variety and growth of the tree, and can be adjusted according to the "control of strong heads, retract long mother branches, cut the autumn branches, cut the flower head, the branch group should be renewed, go to the weak and leave strong branches, winter pruning does not leave the head, and the next year does not lack the head." The mantra of pruning. The pruning time should also be chosen, and it is best to carry out it between the cold dew and the beginning of winter, when the pruning has less impact on the walnut tree.

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Overview of walnut trees.

Walnut trees are widely adapted to soil, but are suitable for planting on deep, loose, fertile, moist sandy loam soils. They prefer warm, humid environments and are not tolerant of waterlogging. They generally grow on hillsides and hilly terrains at distances of 400-1800 meters. The flowering period is May, and the fruiting period is October.

Walnut tree pruning time.

1.Walnut trees can be pruned in March in the spring, mainly after the peach trees have budded. At this time, the temperature rises, and after the tree sprouts, the nutrients stored in the roots continue to be transported upward, and more nutrients are stored, and the pruning is less harmful at this time.

2.Walnut trees can also be pruned in the summer from late May to the end of June. At this time, it can be harvested in combination with scion, and walnuts can be harvested from early October to early November.

3.The best time to prune walnut trees is from the freezing of the ground to budding, around December, when some trees stop growing in winter and pruning damage is minimal.

Walnut tree pruning method.

Walnut trees grow vigorously and bear many fruits, so they need to be thinned and pruned early to increase the ventilation and light transmission of the plants. When pruning, we should follow the principle of removing the weak and leaving the strong, thinning the dense branches in time, cutting off the diseased insect branches, dead branches and old branches, dense branches, and cross branches, so as to reduce the loss of nutrients, and prune the residual flowers in time after flowering.

Walnut tree pruning precautions.

Walnut trees can be pruned in winter, pruned in winter and spring, pruned less in summer, not pruned in autumn, and pruned at any time when the sick are found.

Font walnut trees are most suitable to prune 2 to 3 times a year. Spring pruning walnut trees is about March every year, and summer pruning walnut trees is generally between June and September each year, generally after the walnuts are picked and before the leaves turn yellow. The best time is when the incision will not bleed.

Walnut tree pruning time.

Pruning walnut trees can make them reasonably pruned into a qualified tree shape according to the goal, and can also adjust the light to make it grow better in the sun. In the end, the walnut tree will achieve the expected yield and economic benefits. In addition, it is necessary to insist on pruning in all seasons to achieve early fruit and high yield.

Walnut tree pruning.

Step 1: Bow your head in time after picking walnuts. Step 2:

Step 3: Try to reduce the branches as little as possible, try to keep them, but if they are too honey, it is recommended to cut them off. Step 4:

For the upright and leafy branches of the walnut tree, if there is room for cultivation, it is necessary to pull out their hearts in time.

When is the walnut tree pruned well.

Generally, the time to prune walnut trees is about twenty days before the spring germination, about March to April, pruning walnut trees at this time, the damage to walnut trees is the least, of course, in the walnut tree growth period, you can also prune several times; You should know that there are many varieties of walnut trees, and different varieties of walnut trees have different pruning times, suitable temperatures, and can be pruned all year round.

When we prune the walnut tree, it is best not to prune it during its dormant period, which is easy to cause the walnut tree to lose water quickly, and the nutrients will be consumed faster, which can easily lead to the death of the walnut tree.

When we prune walnut trees, we can cut off some dead branches and rotten leaves, and then cut off some annual branches and perennial branches, so that the branches of walnut trees will not be too dense and affect the growth of new branches; Some flower lovers will also prune from the bottom of the walnut tree, and if the walnut tree grows long, all these long branches should be cut off, so as to ensure that the walnut tree grows in a nutrient-rich environment.

The best times to prune walnut trees are: spring pruning, summer pruning, autumn pruning, and winter pruning.

1. Spring pruning

Spring pruning refers to pruning that takes place after the walnut tree has budded, and the earlier the pruning, the better.

Spring pruning is suitable for young trees, the first two years of tall grafts, and weak walnut trees. Because the growth fullness of the branches of young trees and tall trees is poor in the first two years, the branches have large pith cores, and the nutrients flow of the tree body after the germination stage, and will not be dehydrated and dried up due to the loss of water from the wound. Weak trees have less water content, and pruning the wound in spring will not dry out, which is conducive to wound healing.

2. Summer pruning

Summer pruning is carried out in conjunction with scion harvesting, which is best done from late May to the end of June. Summer pruning must be based on the physiological characteristics of walnut trees, walnut trees have large leaves, poor branching ability, and drooping branches. Pruning is mainly to thin the dorsal and lower branches, and it is best not to cut it short in summer, because; First of all, the new branch has a large medullary heart, and the wound should not be healed.

3. Autumn pruning

It is carried out after the walnut harvest and before the leaves fall (early October to early November). At this time, the leaves are not falling, and the nutrients of the tree body flow back to the roots, and the wound flow is small. During this period, pruning is the most harmful to the tree, because it is in the period of nutrient reflux, more nutrients will be lost, and the wound is easy to lose water, the xylem of the larger wound is easy to crack, the cortex is dehydrated and dry, the wound is not suitable for healing, and it is easy to be infected with diseases.

4. Winter pruning

The best time to prune fruit trees is from the time the ground freezes to the time before bud break. Due to the large water content of the walnut tree, the tree part stops growing in winter, and there is no place to use water, and to maintain the activity of the tree, the water content of the walnut tree does not change greatly, so the pruning of this period will appear in the cutting and sawing mouth of a large "wound flow".