Because walnut trees are different from other fruit trees, pruning during dormancy is easy to cause bleeding, which makes a lot of nutrients and water lose, leading to weak trees and dead branches, which seriously affects strict quantity.
Generally, after the fruit is picked and before the leaves fall, the big branches above the side branches can be pruned at any time except during the dormant period. In addition, according to the different site conditions and tree potential, the pruning period and effect are not consistent. There is such experience in production practice: "autumn pruning promotes strength, and it is appropriate to cut weak trees, old trees and hillside trees;" Pruning in spring should be cured, and trees that are too prosperous and fruitless should be cut down; In winter, it is advisable to cut down trees that grow vigorously on the flat land (that is, bleeding trees). "The crown structure of walnut trees can be divided into two types: natural happiness without central trunk and evacuation layered with central trunk. The choice of tree shape mainly depends on the topography, soil conditions, management level, variety characteristics and cultivation habits of the cultivation area. The fixed dry height of young trees mainly depends on the growth and development characteristics of varieties, cultivation purposes, site conditions and cultivation methods. The tree height of late-bearing walnut is fixed dry height 1.5 ~ 2.0m, and that of Geng, Mi and Feng orchards is 0.5 ~1.0m.. Because the growth and fruiting habits of early fruiting walnuts and late fruiting walnuts are not the same, their pruning methods are also different. Early fruiting walnut has strong branching ability and high lateral flower bud rate, which is suitable for short branch pruning. The proportion of lateral flower buds of late-bearing walnut is low, and a large number of short cuts affect the yield of the year. Pruning methods based on thinning and short cuts can be implemented.
Question 2: When is the best pruning time for walnut trees? What tree is good? The tree shape must conform to the growth characteristics of walnut. Walnut is relatively dry, young branches grow vigorously, and branches of adult trees and old trees grow weakly and droop easily. Therefore, walnut shaping should choose dry type, such as trunk type, evacuation layered type or multi-center dry type. How high is the trunk? The branching angle of walnut is relatively large, and the lateral branches are easy to grow, especially after entering the full fruit stage, the branches are easy to droop. So walnuts are higher than other tree species. In addition, the fixed stem height should be determined according to tree shape, variety and planting density, especially variety and planting density. The dry height of late-bearing varieties is higher than that of early-bearing varieties. The density of sparse planting is higher than that of close planting. At present, walnuts are mostly cultivated in pieces, which are newly cultivated early-fruiting varieties, so the fixed dry height should be about 1 meter. How to cultivate the main branch: Although the newly planted walnut tree does not sprout and spread its leaves, the cut will not bleed after cutting, but the wound will not heal and should be protected. Because walnut has strong branching ability, weak germination ability and large branching angle, leaving more main branches in the same layer will increase the branching angle. Therefore, the main branches of walnuts should be kept as little as possible. It is best to leave three main branches on the first floor of the base, and two main branches on the second floor and above. How to rebuild quickly: The central task of management in the first year of walnut planting is to find ways to improve the survival rate, leave all the new shoots on the trunk and increase the leaf area as much as possible, so as to make more nutrients and store them in branches, stems and roots for the winter. Young walnut trees grow vigorously. From the second year, the new shoots grow much longer every year. Therefore, during this period, the new branches will take two years. When the new branches of the cultivated backbone branches grow to 50-60 cm, they should be cored, branched quickly and formed early. However, the resulting branches should not be cut short to make them bear fruit in advance.
Question 3: When will the walnut tree be pruned? Pruning in autumn is an important technical measure for the cultivation of early-bearing walnut trees. While carry out soil, fertilizer and wat management and pest control, reasonable pruning of walnut trees is beneficial to realize that goal of high quality, high yield and stable yield of walnut trees. Some key points of pruning are as follows:
1. Pruning period and main tasks: after harvesting walnuts, before leaves turn yellow (from mid-September to 1 1 early). Pruning at this stage 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 haven't fallen, it is easy to distinguish the over-dense branches from the shade branches, which is beneficial to ventilation and light transmission, and there will be no flow injury at this time. Autumn pruning is mainly to remove over-dense branches and shade branches; Retract the drooping branches; Adjust the skeleton structure of the tree. In addition, pruning in autumn promotes strength and is suitable for pruning weak trees, old trees and walnut trees on the hillside. At this time, it can move the big branches smoothly without injury.
Second, pruning method: thinning dense branches and processing low branches. Early fruiting walnut has many branches, which is easy to cause many branches in the crown and high density, which is not conducive to ventilation and light transmission. In this regard, according to the principle of weakening and retaining strength, the branches that are too dense should be thinned in time. The specific method is: close to the base of the branch, cut it off, and stick the anti-corrosion film of the corpus callosum in time, and don't leave any branches, so as to facilitate wound healing. Most of the back branches are planted on the back of the tip of the mother branch, which germinates early in spring, grows vigorously and has strong competitiveness, which is easy to weaken the original branches, causing the phenomenon of "upside down" and even causing the original branches to die. Its treatment method: cut it off after germination or at the early stage of branch elongation. If the original mother branch is weak or the branching angle is too small, the original branch can be replaced by the lower branch or inclined upper branch on the back, and the original branch can be cut off or cultivated into a bearing branch group. If the growth potential of the lower branches of the back is moderate and mixed buds have been formed, the results can be retained. If the lower branches at the back grow vigorously, they can be retracted at the appropriate branches after fruiting and cultured into small fruiting branches.
Question 4: When is the walnut tree suitable for shaping and pruning? The best pruning time is 10 before defoliation and 10 after germination, and there is less bleeding in these two stages. The walnut orchard planted in a large area is unlikely to be pruned in such a short time, and can basically be pruned in the defoliation period. Although there is bleeding, it will lose some body fluids and nutrients, but it is not enough to cause great harm. If pruning cannot be completed in these two stages, it is generally recommended to prune after the year is safer.
In addition, brushing teeth in spring, thinning branches in summer and coring are all good pruning methods, which can not only arrange the tree shape as soon as possible, but also reduce unnecessary consumption of nutrition, thus reducing the amount of pruning in winter.
Question 5: When will the walnut trees in Lunan be pruned? It is more suitable to prune walnut trees in early March (before germination 1 month), when the bleeding is light and the nutrient loss is not great. Pruning after germination, although bleeding is light, but nutrient loss is great.
Question 6: Q: When will the walnut trees be pruned?
Walnut trees are usually pruned in autumn.
Because walnut trees are different from other fruit trees, pruning during dormancy is easy to cause bleeding, which makes a lot of nutrients and water lose, leading to weak trees and dead branches, which seriously affects strict quantity.
hope this helps
Question 7: When is the best pruning time for peach trees? 1. Pruning of fruit trees.
(1) Pruning in the first fruiting period: during this period, that is, 4-6 years after planting, the task of pruning is to continue to cultivate backbone branches, expand crown, ease tree vigor, promote flowering and improve fruit. At the same time, the fruiting branches should be cultivated in a planned way to lay a good foundation for high yield. When pruning, light cutting and slow release are the main methods, making full use of coring in summer to increase the number of branchlets and the thickness of backbone branches. For the big branches that disturb the tree shape, the strong branches can be thinned out in winter, and then the short branches can be lightly cut to promote the fruit, and then gradually thinned out after the tree vigor eases. The extension branches of main branches and lateral branches should be cut off by 50-70cm, and the extension branches should be evenly distributed, and the spacing should be increased. Pay attention to the methods of thinning, pressing and releasing to keep the growth balance of each main branch.
(2) Pruning at full fruit stage: The task of pruning at this stage is to constantly adjust the contradiction between growth and fruit, and try to prolong the full fruit stage. The specific method is to increase the amount of pruning, retract and update the weak backbone branches and large, medium and small fruit branches as appropriate, choose to keep the preparatory branches, cultivate and replace the backbone branches and fruit branches, and at the same time remove the peripheral branches appropriately to promote the emergence of new branches in the later stage and supplement the dead cavity fruit branches.
(3) Pruning in the aging period: the focus of pruning is to retract and update the crown. Under normal circumstances, the branches are retracted at 3-4 years old, and the branches with vigorous growth are cut off; Trees with elongation branch growth less than 20 cm can be retracted in the 5-6 year-old part of the main branch, and the elongation branch growth is only about 10 cm. Trees with weak tree potential can be partially retracted at 7-8 years old.
2. Pruning in production season
(1) Bud wiping: After the oak tree germinates in early spring, it can be wiped when the tender buds grow to 3-5cm. Generally, two or three branches grow in one bud, and all the branches are smoothed except 1 strong branches, so as to concentrate nutrients and promote the development and enrichment of branches.
(2) Picking: Generally, from late May to early June, when the extension branches of the main branch and the secondary branch are about 50 cm long, the core can be picked, that is, the tender part of the new shoot is about 0 cm; If the long branches are suitable, 6-8 buds can be left for pinching; The fruiting branch or auxiliary culture branch can be left for coring about 30 cm. Generally, coring in the early stage of branch development can promote the germination and growth of secondary branches and make them form good branches or fruiting branches, while coring in the later stage can enrich branch tissues and make flower buds full, so coring on flourishing trees and flourishing branches can be earlier and more frequently, while coring on weak branches can be later and less frequently.
(3) Pruning: for the fruit branches that have already set fruit, a tender and short pruning can be left on the upper part of the young fruit; For medium-long fruit branches that have been opened but have not borne fruit, 2-4 buds can be left short to make them bear fruit in the same year; The treetops that are too dense under the tree can be properly thinned out. Pruning time is usually controlled before mid-June, and peach trees are easy to flow from July to August and are not suitable for pruning.
(4) Twisting the tip: When the base of the new branch begins to lignify in mid-May, you can hold the initial hardened part by hand, twist it first and then bend it, so that the xylem is slightly damaged and the tip is slightly horizontal or drooping, so as to alleviate the growth potential of the tip and prevent excessive growth, and you can obtain the dual effects of results and renewal.
Question 8: How many months will the walnut tree be pruned? For small walnut trees, pruning is generally carried out before germination in spring. If the tree is strong and wants to be weakened by pruning, it is usually pruned before and after the leaves fall in autumn to reduce the nutrient reflux of the leaves.
Question 9: When is the best pruning time for walnut trees? Pruning of walnuts is carried out after harvest and before leaves turn yellow (from mid-September to165438+1early October). Pruning at this stage 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 haven't fallen, it is easy to distinguish the over-dense branches from the shade branches, which is beneficial to ventilation and light transmission, and there will be no flow injury at this time.
Pruning technology of walnut:
1. Pruning of main branches: In order to control the height of the fruit tree, the top three-pronged branch can be used to gradually lower the head, and the top main branch can replace the tree head, so that the height of the tree can be controlled at about 6 meters. Therefore, the trunks at all levels of the tree are constantly extending, and the crown is also expanding. Therefore, it is still necessary to cultivate a solid and gradually extending skeleton, control the back branches in time, and take back the drooping branches to replace the original ones to maintain the growth of branches. If the extended branches droop, you can use the inclined branches to pick the heads to rejuvenate the branches.
2. Pruning of surrounding branches: The branches, cross branches and overlapping branches that are too dense outside the crown should be thinned or retracted in time. For some weak branches with insufficient illumination and more consumption than accumulation, they should be thinned out in time to meet the requirements of evacuation of peripheral branches and non-empty lumen.
3. Pruning of fruiting branches: For walnut trees that enter fruiting, the fruiting branches should be selected and cultivated in a planned way.
4. The transformation of auxiliary branches can be gradually transformed into large or medium-sized branches by shrinking or shortening according to the space occupied and the distance from the surrounding main branches.
5. With the strong developing branches, the strong branches born in the middle or outside of the main and lateral branches can be removed, the strong branches can be removed, and the straight branches can be left flat, and the remaining developing branches can be gradually transformed into middle branches or branchlets.
6. Control the long branches, and control the use of long branches in the inner room. Under the condition of not affecting ventilation and light transmission, the living parts are suitable. Generally speaking, the head is long and retracts at the weaker branches in the second year, and it is cultivated into small fruiting branches. The spacing between branches should be 60- 100 cm to facilitate ventilation and light transmission. For aging branches, they should be retracted and rejuvenated in time.
Question 10: When will the walnut trees be pruned in spring? Pruning walnut trees in autumn is an important technical measure for the cultivation of early-bearing walnut trees. While carry out soil, fertilizer and wat management and pest control, reasonable pruning of walnut trees is beneficial to realize that goal of high quality, high yield and stable yield of walnut trees. Some key points of pruning are as follows:
1. Pruning period and main tasks: after harvesting walnuts, before the leaves turn yellow (from mid-September to165438+1early October). Pruning at this stage 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 haven't fallen, it is easy to distinguish the over-dense branches from the shade branches, which is beneficial to ventilation and light transmission, and there will be no flow injury at this time. Autumn pruning is mainly to remove over-dense branches and shade branches; Retract the drooping branches; Adjust the skeleton structure of the tree. In addition, pruning in autumn promotes strength and is suitable for pruning weak trees, old trees and walnut trees on the hillside. At this time, it can move the big branches smoothly without injury.
Second, pruning method: thinning dense branches and processing low branches. Early fruiting walnut has many branches, which is easy to cause many branches in the crown and high density, which is not conducive to ventilation and light transmission. In this regard, according to the principle of weakening and retaining strength, the branches that are too dense should be thinned in time. The specific method is: close to the base of the branch, cut it off, and stick the anti-corrosion film of the corpus callosum in time, and don't leave any branches, so as to facilitate wound healing. Most of the back branches are planted on the back of the tip of the mother branch, which germinates early in spring, grows vigorously and has strong competitiveness, which is easy to weaken the original branch, causing the phenomenon of "reverse pulling" and even causing the death of the original branch. Its treatment method: cut it off after germination or at the early stage of branch elongation. If the original mother branch is weak or the branching angle is too small, the original branch can be replaced by the lower branch or inclined upper branch on the back, and the original branch can be cut off or cultivated into a bearing branch group. If the growth potential of the lower branches of the back is moderate and mixed buds have been formed, the results can be retained. If the lower branches at the back grow vigorously, they can be retracted at the appropriate branches after fruiting and cultured into small fruiting branches.