A culture method of Zanthoxylum bungeanum Maxim. umbrella-shaped dense planting tree shape

Abstract

The application discloses a culture method of Zanthoxylum bungeanum umbrella-shaped dense planting tree shape, which comprises the following steps: in the first year of planting, in spring, the trunk is fixed, in winter, 2-3 strong branches are selected and reserved as main branches, and the main branches are cut short; in the second year of planting, lateral branches are selected and reserved, the angle of the main branches is 90 degrees, and the lateral branches are horizontally downward by 30 degrees; in the third year of planting, in summer, the new shoots sprouting on the back and oblique of the main branches and lateral branches are cut short according to the principle of high inside and low outside, thick inside and thin outside, and 60-20 cm is reserved; in winter, the extension head of the main branches is removed, and the main branches start to grow with fruiting branches; in the fourth year of planting, the extension head of the fruiting branch group on the back or oblique is cut short according to the reservation principle in the third year; in the fifth year of planting and the following years, the culture and renewal of the fruiting branch group are mainly carried out through the ways of local branch pulling, zooming combination and sparse and dense complementation. Compared with the traditional culture method, the culture method can significantly improve the planting density and the number of trees per mu of Zanthoxylum bungeanum, the fruiting period is advanced, the yield and quality are improved, and the early yield and high yield of Zanthoxylum bungeanum are realized.

Description

Technical Field

[0001] This invention belongs to the field of pepper tree shaping technology, specifically relating to a method for cultivating a densely planted, umbrella-shaped pepper tree. Background Technology

[0002] Sichuan pepper production commonly employs two tree shapes: one is the traditional large-canopy sparse planting model, known as the natural open-center tree shape, with a suitable planting density of 3-4m × 4-5m. Its main drawback is low space utilization during the sapling stage and delayed maturity. The other is the high-canopy, dense planting model with multiple main branches, known as the bush-like tree shape, with a suitable planting density of 2-3m × 3-4m. Its main drawback is that the excessively tall canopy after maturity makes harvesting inconvenient. Both traditional tree shapes share the disadvantage of delayed maturity and, after maturity, a tall canopy and hollow interior, severely restricting the efficiency of harvesting and pruning, thus hindering early and high yields and harvesting. Therefore, exploring a cultivation method for an umbrella-shaped, densely planted Sichuan pepper tree shape is crucial to address these issues. Summary of the Invention

[0003] The technical problem to be solved by this invention is to address the shortcomings of the prior art by providing a method for cultivating a densely planted umbrella-shaped tree for Sichuan pepper. This method allows for 2-3 times more trees per acre than the traditional open-center tree system, enabling trees to enter the fruiting period 1-2 years earlier, and facilitating early and high yields in base planting. This umbrella-shaped tree system changes the traditional tree system, which primarily bears fruit on horizontal branches on both sides of the main branches, to one where fruiting is primarily on upward-sloping branches. This results in stronger growth of fruiting branches, longer fruiting lifespan, larger Sichuan pepper spikes, and earlier and higher yields.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a method for cultivating a densely planted, umbrella-shaped tree of Sichuan pepper, the method comprising the following steps:

[0005] S1, Planting year:

[0006] S11. Planting: Plant two-year-old Sichuan pepper seedlings in the planting pit in spring;

[0007] S12. Pruning: Prune the trunk on the same day after planting, with a pruning height of 20-25cm.

[0008] S13. Selection and pruning of main branches: After the leaves of the Sichuan pepper tree fall in winter, select 2-3 strong and vigorous branches that sprouted after the trunk was established in S12 as main branches, and remove the rest; prune the selected main branches at 30-40cm to promote the growth of lateral branches.

[0009] S2, 2nd year after planting:

[0010] S21, select and keep side branches and pinching: in early or middle June, 1 strong and thick new shoot is selected and kept as a side branch on each side of the main branch, which is cultivated together with the main branch as a backbone branch; other new shoots sprouting on the main branch are treated, new shoots in horizontal or oblique downward direction are kept 20-25 cm and short cut in summer, new shoots in upward direction are pinched;

[0011] S22, short cutting of backbone branches and heavy pulling of branches: after the pepper trees shed leaves in winter, the top of the main branch and the selected side branches in S21 are cut 5-10 cm from the top, and the branches are fixed by binding ropes at 1 / 2 of the main branch and the side branch, the waist angle of the main branch is pulled to 90° with the vertical direction, and the side branch is pulled to horizontal downward 30°;

[0012] S3, the third year after planting:

[0013] S31, summer pruning: in late June, the new shoots sprouting upward on the backbone branches are short cut; the treatment of new shoots in horizontal or oblique downward direction on the backbone branches is the same as S21;

[0014] S32, winter pruning: 8-12 large and medium-sized fruiting branches sprouting upward on each backbone branch are selected and kept, which are retracted to the short cutting position in S31; small and medium-sized fruiting branches growing in horizontal or oblique downward direction are kept 30 cm long and retracted to keep compact; the extension of the main branch is removed, and the main branch starts to grow with fruiting branches;

[0015] S4, the fourth year after planting

[0016] S41, summer pruning: in late June, the extension of the large and medium-sized fruiting branches sprouting upward on the backbone branches after S3 treatment is short cut, and the length of the large and medium-sized fruiting branches sprouting upward after short cutting from inside to outside is increased to 120 (60+60) -40 (20+20) cm;

[0017] S42, winter pruning: the large and medium-sized fruiting branches sprouting upward are retracted to the short cutting position in S41; the treatment of small fruiting branches growing in horizontal or oblique downward direction is the same as S32;

[0018] S5, the fifth year and after

[0019] The fifth year enters the peak fruiting period, and the tree shape management mainly focuses on the cultivation and renewal of fruiting branches;

[0020] S51, summer pruning: in the growing season, the current year shoots germinated around the framework branches are pruned in time when they appear crossing and overlapping, or are cultivated into fruiting branch groups by means of branch pulling and pinching; the strong and vigorous nutrient branches germinated at the top of the large and medium-sized fruiting branch groups on the back and oblique upper part are pruned in time; with the growth and expansion of the fruiting branch groups, the branch groups are prone to crowding and crossing, and the branch distance is pulled apart in time by means of branch pulling, pruning direction changing and shortening to ensure ventilation and light penetration;

[0021] S52, winter pruning: in the dormant period, the main shaping and pruning target is to reasonably distribute the fruiting space and ensure ventilation and light penetration, while basically ensuring the umbrella-shaped characteristics of the tree crown, the over-dense, overlapping and diseased branches are pruned, the fruiting branches are shortened, the fruiting branch groups are continuously and dynamically updated by means of retraction and slow release combination, the stability of the permanent framework branches and the annual fruiting ability of the fruiting branch groups are ensured, and finally the large and medium-sized fruiting branch groups on the back and oblique upper part are mainly used for fruiting, and the umbrella-shaped tree crown has a high inner cavity and a low outer edge.

[0022] Preferably, the planting row spacing in S11 is 2-2.5m*3-4m, and the number of plants per mu is 67-111.

[0023] Preferably, the shortening method in S31 is to retain 60-20cm according to the principle of high inside and low outside, thick inside and thin outside.

[0024] Preferably, the shortening of the extension head of the back and oblique upper fruiting branch group in S41 is the same as the shortening method in S31.

[0025] Preferably, the crown width in the umbrella-shaped tree crown with a high inner cavity and a low outer edge in S52 is 2.0-2.5m, and the crown height is 1.2-1.4m.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] 1. The training method of the umbrella-shaped dense planting tree shape of Zanthoxylum bungeanum in the present application has the following advantages:

[0028] 2. The tree canopy cultivated by the method of this invention is umbrella-shaped with a canopy width of 2.0-2.5m and a canopy height of 1.2-1.4m. The main branches and lateral branches, etc., are horizontally downward. The fruiting branches are mainly composed of fruiting branches growing on the back and sides of the main branches, and the thickness and height of the fruiting branches gradually decrease from the inner canopy to the outer edge. After entering the fruiting period in the third year after planting, the extension heads of the main branches are removed, and the main branches begin to be led by fruiting branches, and the canopy no longer expands rapidly.

[0029] 3. The advantages of the umbrella-shaped dense planting tree shape of the pepper tree in this invention are that the tree canopy is low and compact, suitable for dense planting and harvesting, and the number of trees per mu is 2 to 3 times that of the traditional open-center tree shape. It enters the fruiting period 1 to 2 years earlier, and it is easy to achieve early and high yield in the base planting. The umbrella-shaped tree shape changes the traditional tree shape, which mainly bears fruit on the horizontal branches on both sides of the main branches, to mainly bear fruit on the back obliquely upward branches. The fruiting branch groups have strong growth and long fruiting life, and the pepper spikes are large, resulting in early and high yield.

[0030] 4. In the cultivation method of this invention, the main branch is pulled to a 90° angle with the vertical direction, and the lateral branches are pulled to a 30° angle downwards horizontally. Compared with the general pepper tree shape where the main and lateral branches are pulled at an angle of 30-60°, the tree shape in this invention has a larger pulling angle, the purpose of which is to further promote the growth of a large number of branches in the middle and rear parts of the main branches. The technical solution of this invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0031] Figure 1 This is a picture of a single Sichuan pepper tree in the 5th year of the results in Embodiment 1 of the present invention.

[0032] Figure 2 This is a distant view of the cultivation method of the umbrella-shaped densely planted pepper tree in Embodiment 1 of the present invention. Detailed Implementation

[0033] Example 1

[0034] This example was conducted in Wenjiawan Village, Maiji District, Tianshui City, Gansu Province from 2017 to 2023, with a planting area of ​​8 mu.

[0035] The cultivation method for the umbrella-shaped densely planted Sichuan pepper tree in this embodiment includes the following steps:

[0036] S1, Planting year:

[0037] S11. Planting: Select two-year-old seedlings of Fujiao Dahongpao with a clear variety, well-developed root system, plump branches and buds, and free from diseases and pests. Plant them in planting pits with a depth of 60cm and a diameter of 80cm in spring. The planting spacing is 2.5m×4m, and the number of plants per mu is 111.

[0038] Planting pit below 25 cm from the ground backfill mixture of topsoil and organic fertilizer, within 25 cm from the ground only backfill topsoil, plant seedlings in topsoil and then tamp and ensure that the original buried mark of seedling stem is level with the ground, and pour 1.5 Kg of planting water;

[0039] S12, dry: dry the next day after planting, the dry height is 20 cm, that is, cut off the part above 20 cm of the main stem of the seedling, and cut off other branches on the main stem, and note that the cut surface is smeared with wound healing agent;

[0040] S13, main branch selection and shortening: after the winter pepper tree sheds leaves, select 2 strong branches of the current year that sprout after dry in S12 as main branches, and remove the rest; the selected main branches are shortened at 30-40 cm to promote lateral branches;

[0041] S2, the second year after planting:

[0042] S21, selection of lateral branches and pinching: in early to mid June, select 1 strong and thick new shoot on each side of the main branch as a lateral branch, together with the extension head of the main branch as the backbone branch, and treat other new shoots sprouting on the main branch, the new shoots on the horizontal or oblique downward direction of the main branch are reserved for 20-25 cm shortening in summer, and the new shoots on the back and oblique upward direction of the main branch are only pinched;

[0043] S22, light shortening of backbone branches and heavy pulling of branches: after the winter pepper tree sheds leaves, the extension head of the main branch and the back bud of the selected lateral branch in S21 are cut by 5-10 cm; meanwhile, the branches are fixed by binding ropes at 1 / 2 of the main branch and the lateral branch, the waist angle of the main branch is pulled to 90° with the vertical direction, and the lateral branch is pulled to horizontal downward 30°;

[0044] S3, the third year after planting:

[0045] S31, summer pruning: in late June, the new shoots sprouting on the back and oblique upward direction of the backbone branches (main branches and lateral branches) are reserved for 20-60 cm shortening according to the principle of inside high and outside low, thick high and thin low; the treatment of the new shoots on the two sides or oblique downward direction of the backbone branches is the same as that of other new shoots sprouting on the main branch in S21;

[0046] S32, winter pruning: select 8-12 large and medium-sized fruiting branches on the back and oblique upward direction of each backbone branch (main branch and lateral branch) and retract them to the shortening position in S31; the medium and small-sized fruiting branches growing horizontally or obliquely downward are reserved for 30 cm length retraction to keep compact fruiting shape; remove the extension head of the main branch, and the main branch starts to grow with fruiting branches;

[0047] S4, the fourth year after planting

[0048] S41, summer pruning: in late June, the elongated heads of the oblique-upward large and medium-sized fruiting branch groups formed after S3 treatment on the main branches are pruned, and the length of the pruned oblique-upward large and medium-sized fruiting branch groups is increased from the inside to the outside to 120 (60+60) to 40 (20+20) cm; the pruning method of the elongated heads of the oblique-upward fruiting branch groups in S41 is the same as that of the pruning method in S31;

[0049] S42, winter pruning: the oblique-upward large and medium-sized fruiting branch groups are retracted to the pruning position in S41; the small fruiting branch groups growing horizontally or obliquely downward are retracted by retaining a length of 30 cm; the fourth year of planting is the transition period from the initial fruiting period to the peak fruiting period of the Zanthoxylum bungeanum tree;

[0050] S5, the fifth year of planting and after:

[0051] The fifth year enters the peak fruiting period, and the tree shape management mainly focuses on the cultivation and renewal of the fruiting branch groups in the subsequent years;

[0052] S51, summer pruning: in the growing season, the new shoots that grow around the main branches are pruned in a timely manner when they intersect and overlap, or are cultivated into fruiting branch groups for use through branch pulling and pinching; the strong and vigorous nutrient branches that grow at the top of the large and medium-sized fruiting branch groups are pruned in a timely manner; as the fruiting branch groups grow and expand, crowding and overlapping of the branch groups may occur, and the branch spacing can be pulled apart in a timely manner through branch pulling, pruning direction changing, and shortening and retracting to ensure ventilation and light penetration;

[0053] S52, winter pruning: in the dormant period, the pruning mainly focuses on the goal of reasonably and adequately distributing the fruiting space and ensuring ventilation and light penetration, while basically ensuring the umbrella-shaped characteristics of the tree crown, and continues to prune the dense, overlapping, and diseased branches, prunes the fruiting branches, and continuously and dynamically updates and cultivates the fruiting branch groups through retraction and slow release to ensure the stability of the permanent main branches and the annual fruiting capacity of the fruiting branch groups, and finally presents an umbrella shape with the oblique-upward large and medium-sized fruiting branch groups as the main fruiting branch groups and the tree crown as a whole presenting an umbrella shape with a high inner cavity and a low outer edge; the crown width of the umbrella shape is 2.0-2.5 m, and the crown height is 1.2-1.4 m.

[0054] The tree shape mainly relies on the oblique-upward large and medium-sized fruiting branch groups for fruiting, and the tree crown is small and compact, suitable for close planting, and due to the obvious back-up advantage, the fruiting branch groups grow vigorously, have a long fruiting life, and produce large and heavy pepper clusters; the tree shape enters the initial fruiting period in the third year and enters the peak fruiting period in the fifth year, and the annual yield is: 32 kg of dry peppers per mu in the third year, 65 kg in the fourth year, and 140-150 kg in the fifth year and after, with a high-quality fruit rate of more than 94% per year, and a fruiting life of 20 years.

[0055] The plant spacing in the embodiment S1 can also be 2m*3m, and the number of plants per mu can also be 67, 100, 80, 90, 95 or 110; the method of pulling the branch in S51 and the method of pulling the branch at an angle in S52 are the same as those in S22; the method of shortening the fruiting branch group in S52 is the same as that of the large and medium-sized fruiting branch group in S32; and the method of retracting the fruiting branch group is the same as that of the medium and small-sized fruiting branch group growing horizontally or obliquely downward in S32.

[0056] Comparative Example 1

[0057] The present comparative example is a traditional open tree training method for Zanthoxylum bungeanum trees, which mainly comprises the following steps:

[0058] S1, planting in the current year

[0059] S11, planting: selecting healthy Zanthoxylum bungeanum seedlings and planting them in planting holes with a depth of 60 cm and a diameter of 80 cm in the spring, with a plant spacing of 3.5m*4.5m and a plant number of 42 per mu;

[0060] S12, setting the trunk: the setting height is 40 cm;

[0061] S13, winter pruning: selecting 3 branches with similar growth vigor and healthy and long as main branches for cultivation, and retaining a 40 cm moderate shortening;

[0062] S2, the second year after planting:

[0063] S21, spring pruning: timely removing the new shoots on the back of the main branches, and retaining the horizontal or obliquely downward new shoots on both sides, and the same applies to the following;

[0064] S22, winter pruning: selecting 1 competitive branch on the same side of each main branch as the first side branch, and removing the remaining competitive branches on both sides; the main branch extension head is retained with a 30 cm moderate shortening;

[0065] S3, the third year after planting

[0066] S31, winter pruning: selecting 1 competitive branch on the opposite side of the first side branch in S22 as the second side branch for each main branch, and removing the remaining competitive branches, while cutting off the main branch extension head and the side branch by 5-10 cm; the main branch is pulled at an angle, with an angle of 45° to the vertical direction, and the side branch is pulled at an angle of 75°;

[0067] S4, the fourth year after planting

[0068] S41, spring pruning: continuing to remove the branches on the back of the main and side branches, and pinching the retained horizontal and obliquely downward nutrient branch shoots to control their growth;

[0069] S42, winter pruning: continuing to lightly shorten the main and side branch extension heads, i.e., cutting off 5-10 cm;

[0070] The tree shape is basically formed in the 4th year of planting and enters the initial fruiting period, and the tree shape management in the current year and the following years is mainly carried out around the cultivation and renewal of the fruiting branch group. With the increase of the fruiting branch group, the yield gradually increases, and reaches the peak fruiting period in the 6th-7th year;

[0071] The annual yield per mu in this comparative example is: 20 kg in the 4th year, 50 kg in the 5th year, and the yield is stably maintained at 80-100 g in the peak fruiting period in the 6th-7th year, and the high-quality fruit rate reaches about 85% per year. The general fruiting life is 15 years.

[0072] Comparative Example 2

[0073] The comparative example is a traditional multi-main branch bushy tree shape of Zanthoxylum bungeanum trees, and the method mainly includes the following steps:

[0074] S1, the first year of planting

[0075] S11, planting: select healthy Zanthoxylum bungeanum seedlings, and plant them in planting holes with a depth of 60 cm and a diameter of 80 cm in the spring, with a plant spacing of 2.5 m x 4.0 m and a planting density of 67 plants per mu;

[0076] S12, setting the trunk: the setting height is 15 cm;

[0077] S13, winter pruning: select 6-8 branches with similar growth vigor as main branches for cultivation, and retain a medium short cut of 40 cm;

[0078] S2, the 2nd year after planting:

[0079] S21, spring pruning: select 1 strong and vigorous new shoot on each side of the main branch as a side branch for cultivation, and timely remove other competing branches; and pinch the main branch extension head and the side branch;

[0080] S22, winter pruning: cut off the main branch extension head and the side branch tip by 20 cm;

[0081] S3, the 3rd year after planting

[0082] S31, spring pruning: remove the crossing and closed new shoots and the strong and vigorous new shoots, and pinch the remaining new shoots;

[0083] S32, winter pruning: the short cutting treatment is the same as S22; according to the space of the tree body, retract and remove the closed branches and the crossing branches to ensure reasonable load and ventilation and light transmission.

[0084] The method of the present comparative example does not need to pull branches and remove back and under branches, and large, medium and small fruiting branch groups are distributed on both sides of the backbone branches and side branches. The tree structure presents a multi-living branch shrub shape and is basically shaped in the third year after planting. The tree shape management is mainly carried out around the cultivation and renewal of the fruiting branch groups. With the increase of the fruiting branch groups, the yield gradually increases, and the yield reaches the peak fruiting period in the seventh year in the early fruiting period in the third year; the yield per year is: 12 kg in the third year, 30 kg in the fourth year, the yield rapidly increases to 100 kg in the fifth to sixth years, and the yield is stable at 120 kg in the seventh year and thereafter, and the high-quality fruit rate reaches about 80% per year, and the general fruiting life is 15 years. The above is only a preferred embodiment of the present application, and does not limit the present application in any way. Any simple modification, change and equivalent change made according to the technical essence of the present application to the above embodiment still belongs to the protection scope of the technical scheme of the present application.

Claims

1. A method for cultivating a Zanthoxylum bungeanum dense-planting umbrella-shaped tree form, characterized in that, The method comprises the following steps: S1, planting this year: S11, planting: planting Zanthoxylum bungeanum 2-year-old seedlings in planting holes in spring; S12, setting dry: setting dry on the day after planting, the setting dry height is 20-25 cm; S13, main branch selection and shortening: after the Zanthoxylum bungeanum tree falls leaves in winter, 2-3 strong branches of the current year which grow after setting dry in S12 are selected and reserved as main branches, and the rest are removed; the selected main branches are shortened at 30-40 cm, so that lateral branches are promoted to grow; S2, the second year after planting: S21, selection and removal of lateral branches and pinching: in early to middle June, 1 strong and vigorous new shoot on each side of the main branch is selected and reserved as a lateral branch, so that the main branch and the lateral branch are used as a backbone branch; other new shoots growing on the main branch are treated, the new shoots growing in the horizontal or oblique downward direction of the main branch are reserved for 20-25 cm and shortened in summer, and the new shoots growing in the upward direction of the main branch are only pinched; S22, light shortening of the backbone branch and heavy pulling of the branch: after the Zanthoxylum bungeanum tree falls leaves in winter, the top 5-10 cm of the main branch extension head and the selected lateral branch with back downward buds in S21 are cut, and the main branch and the lateral branch are fixed by binding ropes at 1 / 2 of the main branch and the lateral branch; the waist angle of the main branch is pulled to 90° with the vertical direction, and the lateral branch is pulled to be horizontal and downward by 30°; S3, the third year after planting: S31, summer pruning: in late June, the new shoots growing in the upward direction of the backbone branch are shortened; the treatment of the new shoots growing in the horizontal or oblique downward direction of the backbone branch is the same as that in S21; S32, winter pruning: 8-12 large and medium-sized fruiting branch groups growing in the upward direction of each backbone branch are selected and reserved, and the selected branch groups are retracted to the shortening position in S31; the medium and small fruiting branch groups growing in the horizontal or oblique downward direction are retracted by 30 cm to keep a compact fruiting shape; the main branch extension head is removed, and the main branch starts to grow with a fruiting branch group; S4, the fourth year after planting S41, summer pruning: in late June, the extension head of the large and medium-sized fruiting branch group growing in the upward direction of the backbone branch is shortened after the treatment in S3, and the length of the large and medium-sized fruiting branch group growing in the upward direction of the backbone branch after the shortening treatment is increased to 120-40 cm from inside to outside; S42, winter pruning: the large and medium-sized fruiting branch group growing in the upward direction of the backbone branch is retracted to the shortening position in S41; the treatment of the small fruiting branch group growing in the horizontal or oblique downward direction is the same as that in S32; S5, the fifth year after planting and the following years The fifth year enters the fruiting period, and the tree shape management mainly focuses on the cultivation and renewal of the fruiting branch group in the current year and the following years; S51, summer pruning: in the growing season, the current year new shoots growing around the backbone branch are removed in time if they cross and overlap, or are cultivated into fruiting branch groups by means of pulling and pinching; the strong and vigorous nutrient branches growing at the top of the large and medium-sized fruiting branch group are removed in time; with the growth and expansion of the fruiting branch group, the branch groups are prone to crowd and cross, and the branch spacing is pulled apart in time by means of pulling, pruning, changing direction and shortening, so that ventilation and light transmission are ensured; S52, winter pruning: dormant period, the main purpose of the reasonable distribution of location results space, to ensure ventilation and light shaping pruning, while basically guaranteeing the canopy umbrella characteristics, combined with the use of pull branches open angle, shrink and short cut back, continue to remove the dense, overlapping and disease branches, short cut processing of the fruiting branches, through the means of back and slow release combination, continue to update the dynamic training fruiting branch group, to ensure the stability of the permanent backbone branches and the ability of the fruiting branch group to bear fruit for years; ultimately present "with back on the oblique on the large and medium-sized fruiting branch group results, the overall canopy presents a high inner chamber, low outer edge of the umbrella shape".

2. The cultivation method for a densely planted, umbrella-shaped tree of Sichuan pepper according to claim 1, characterized in that, The planting row spacing in S11 is 2-2.5m x 3-4m, and the number of plants per mu is 67-111.

3. The cultivation method for a densely planted, umbrella-shaped Sichuan pepper tree according to claim 1, characterized in that, The method of short cutting treatment in S31 is to retain 60-20cm according to the principle of high inside and low outside, thick inside and thin outside.

4. The method of claim 1, wherein the Zanthoxylum bungeanum tree is a Zanthoxylum bungeanum tree having a flower umbrella-shaped dense planting tree shape. The short cutting treatment of the extension head of the back on the oblique on the large and medium-sized fruiting branch group in S41 is the same as the method of short cutting treatment in S31.

5. The method of claim 1, wherein the Zanthoxylum bungeanum tree is shaped as a cone. The crown width in the overall canopy of S52 which presents a high inner chamber, low outer edge of the umbrella shape is 2.0-2.5m, and the crown height is 1.2-1.4m. ​

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