Vegetation root guiding tube

CN224791245UActive Publication Date: 2026-09-25JIANGSU JIAOTONG COLLEGE
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Patent Information

Application Number
CN202522250270.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-24
Publication Date
2026-09-25
Estimated Expiration
2035-10-24

AI Technical Summary

Technical Problem

[0004]本实用新型的目的在于提供植被根系导向生长筒,以解决上述背景技术中提出的仅能提供单一方向的引导路径的植被根系导向生长筒导致根系向筒壁外侧无序生长,会被刚性导向筋过度挤压,造成根系表皮破损的问题

Benefits of technology

1、通过第一复位弹簧推动生长连接筒滑动,可动态适配根系生长:成长期根系变粗时,会推动生长连接筒向外移动,避免刚性挤压导致的根系表皮破损;外力消失后弹簧又能带动生长连接筒自动复位,始终保持根系生长环境稳定,解决了刚性结构无法调间隙的问题,外接连接座的限位槽限制固定安装块轨迹,确保滑动限位杆带动生长连接筒沿预设方向移动,避免幼苗期纤细根系因引导不稳而偏移、向筒壁外侧无序生长,突破了单一刚性引导的局限,大幅提升导向稳定性与使用效果。

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Abstract

The utility model discloses vegetation root system guiding growth cylinder, including external connection connecting seat, still include the limit stop ring of fixed connection in the bottom of external connection connecting seat, install the growth connecting cylinder in the inside of external connection connecting seat, the connecting base of fixed connection on growth connecting cylinder. Through the first return spring and promote growth connecting cylinder sliding, can dynamic adaptation root system growth: when the root system of growth period thick, will promote growth connecting cylinder and move outward, avoid the root system epidermis breakage caused by rigid extrusion, spring can drive growth connecting cylinder automatic reset after the disappearance of external force, always keep the root system growth environment stable, solved the problem that rigid structure can not adjust the clearance, the limit groove of external connection connecting seat restricts fixed mounting block track, ensure that the growth connecting cylinder is driven along the preset direction along with sliding limit rod, avoid the fine root system of seedling period because of guiding instability and offset, disorderly growth to the lateral side of cylinder wall, break through the limitation of single rigid guide, improve guiding stability and use effect greatly.
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Description

Technical Field

[0001] This utility model relates to the field of vegetation root guidance technology, specifically to a vegetation root guidance growth tube. Background Technology

[0002] A plant root guide growth tube is an auxiliary mechanical device used for plant cultivation. Its core function is to guide plant roots to grow in a predetermined direction through a cylindrical structure and guide components, avoiding root tangling or disorderly spread, while protecting the roots from external damage during the cultivation period, ultimately improving the survival rate and growth quality of seedlings after transplanting.

[0003] In existing technologies, the guide ribs of current growth tubes are mostly rigid protrusions fixed along the tube wall, providing only a unidirectional guidance path. During root growth, the diameter and growth rate change with each stage. Fixed rigid guide ribs cannot dynamically adjust the guide gaps according to root thickness. In seedling stages, the roots are thin and easily shift outwards from the guide rib gaps, causing disordered root growth towards the outside of the tube wall. During the growth period, the roots thicken and are excessively compressed by the rigid guide ribs, causing damage to the root epidermis. If existing growth tubes are mostly integrated, non-separable cylindrical structures, the tube must be forcibly disassembled when transplanting mature seedlings. This process can lead to root breakage due to external impact; furthermore, the integrated structure makes the root ball formed by the roots and soil within the tube easily scatter, disrupting the symbiotic environment between roots and soil, further reducing transplant survival rates. Furthermore, forced disassembly incurs additional labor costs, which does not meet the requirements of efficient cultivation. Utility Model Content

[0004] The purpose of this invention is to provide a plant root guide growth tube to solve the problem mentioned in the background art that the plant root guide growth tube, which can only provide a single-direction guide path, causes the roots to grow disorderly to the outside of the tube wall and is excessively squeezed by the rigid guide ribs, resulting in damage to the root epidermis.

[0005] Root-guided growth cylinders belong to the field of agricultural and forestry seedling equipment technology. They focus on root morphology regulation and transplanting assistance during the seedling cultivation stage, and have significant application value in ecological restoration, urban greening, and economic forest cultivation. Currently, the survival rate of conventional bare-root transplanted seedlings in my country is generally 60%-75%. Although container seedling cultivation can increase it to over 85%, it is limited by the disordered root growth morphology. After transplanting, the roots take root slowly and have weak resistance. As the core organ for plants to absorb water and nutrients, the growth direction, distribution density, and integrity of the roots directly determine the growth status of the seedlings. If problems such as root entanglement, knotting, and disordered spread occur during the cultivation stage, it will lead to nutrient transport obstruction. During transplanting, root breakage can prolong the "slow-down" period and even cause seedling withering. Therefore, developing auxiliary equipment that can guide root growth in a directional manner and protect root integrity has become the key to breaking through the current bottleneck of seedling cultivation technology.

[0006] Currently, root-guided technologies in the industry are mainly divided into three categories: physical barrier, structural guidance, and chemical induction. Physical barrier technologies, represented by non-woven fabric seedling bags and paper seedling cups, restrict outward root growth through the material's air and water permeability, using an "air pruning" effect to encourage lateral root branching inwards. However, this technology lacks directionality, resulting in disordered root branching, and its degradation rate is difficult to match the seedling growth cycle; too fast a degradation results in the loss of the barrier effect, while too slow degradation leaves residual soil, hindering root development. Structural guidance is the mainstream technology for rigid seedling containers. It forces roots to grow along channels by setting guide ribs, spiral grooves, or axial grooves on the inner wall of the container. Typical products include plastic corrugated pipe seedling tubes and seedling pots with internally convex ribs, accounting for over 60% of applications in the cultivation of fast-growing poplar and fir timber forests. However, this type of technology remains at the "static guidance" level and cannot adapt to the dynamic growth needs of the root system. Chemical induction, which guides root growth by adding growth regulators or applying inducing agents, can achieve directional guidance, but it is costly, poses significant environmental risks, is difficult to control in terms of dosage, and can easily lead to root deformities. Residues may also pollute the soil. It is only used on a small scale in the research field and has not yet been industrialized and promoted.

[0007] Existing seedling containers can be divided into two categories based on their structure: integrated and modular. Both have technical shortcomings. Integrated containers, represented by injection-molded plastic seedling tubes and terracotta seedling pots, are structurally stable and low-cost. However, they require violent disassembly during transplanting, such as knocking and cutting. Taking the cultivation of 2-year-old Pinus sylvestris seedlings as an example, the root breakage rate during violent disassembly is as high as 35%, and the substrate and soil ball scattering rate exceeds 40%, directly leading to a 2-3 month extension of the seedling recovery period, and some seedlings dying due to root damage. Modular containers were developed to solve the disassembly problem and include three methods: snap-fit ​​splicing, bolt connection, and glue bonding. Snap-fit ​​splicing has poor sealing and is prone to substrate leakage. Bolted connection requires tools for disassembly, is cumbersome, and the bolts are prone to rusting and jamming. Glue bonding cannot be repeatedly disassembled and is only suitable for one-time seedling cultivation scenarios, which does not meet the needs of circular agriculture.

[0008] The core defects of existing technologies are concentrated in three aspects: First, the rigid guide structure cannot adapt to the dynamic growth of the root system. During the seedling stage, the root diameter is only 0.1-0.3mm, while the gap between existing rigid guide ribs is generally 5-8mm. The excessive gap causes the slender roots to easily penetrate and grow along the outer wall of the container, forming "wall-adhering roots". Taking the cultivation of fast-growing poplar seedlings as an example, the incidence of "wall-adhering roots" exceeds 50% after one month, and they are prone to breakage due to adhesion during transplanting. During the growth period, the root diameter increases to 1-3mm or even more than 5mm. The guide ribs with fixed gaps will excessively compress the root system, causing epidermal cell rupture, deformation of vascular tissue, and a 30%-40% decrease in water and nutrient transport efficiency. It is also prone to root rot. In addition, the existing guide path is single and mostly axial straight guidance, which cannot adjust the direction. The local distribution of guide ribs leads to uneven root distribution and the formation of "empty root areas". Secondly, the integrated and traditional spliced ​​structures result in high transplant loss rates. The violent impact of dismantling integrated containers can damage the root system and soil ball. The snap-fit ​​buckles of spliced ​​containers are prone to deformation, bolt disassembly is time-consuming, and glue cannot be reused. Each acre of nursery requires an additional 3-5 hours of labor, and poor sealing leads to substrate leakage and root exposure. Thirdly, the ability to regulate the root growth environment is insufficient. Most existing plastic seedling tubes are sealed, with only a few drainage holes at the bottom. The internal oxygen concentration is only 12%-15% (normal atmospheric oxygen concentration is 21%). Oxygen deficiency inhibits aerobic respiration of the roots, reducing the growth rate by more than 50%, and also produces harmful substances that cause root rot. At the same time, there is no space separation inside the container, and the roots are prone to tangling and forming "root balls". Taking apple rootstock seedlings as an example, the root tangling rate exceeds 70% after 6 months. Separating the roots during transplanting will cause a large number of fine roots to break.

[0009] Based on the shortcomings of existing technologies, current technological innovations in the field of vegetation seedling equipment mainly focus on three directions: First, developing dynamic adaptive guiding technology that can automatically adjust the guide gap according to the root growth stage to achieve "dynamic following" guidance; second, designing a tool-free, quick-assembly and disassembly non-destructive structure to ensure airtightness and reusability; and third, improving container permeability through structural optimization, rationally dividing space to avoid root entanglement, and optimizing the growth environment. The development of the vegetation root guide growth tube is precisely aimed at these needs. It achieves technological breakthroughs through innovative guiding components, connecting components, and dynamic adaptive structures. Its core significance lies in: increasing the survival rate of transplanted seedlings to over 90%, shortening the seedling recovery period by 50%, and ensuring orderly root growth; tool-free quick assembly and disassembly can save 2-3 labor hours per acre of nursery, extend the equipment's service life to 3-5 years, and reduce loss costs by over 60%; eliminating the need for chemical inducing agents reduces plastic waste generation, meeting the "dual carbon" goals and circular agriculture requirements.

[0010] To achieve the above objectives, this utility model provides the following technical solution: a vegetation root guide growth cylinder. It includes an external connecting seat, a limiting ring fixedly connected to the bottom of the external connecting seat, a growth connecting cylinder installed inside the external connecting seat, a connecting base fixedly connected to the growth connecting cylinder, a connecting component installed between one external connecting seat and another, a guide component installed on the growth connecting cylinder, a sliding limiting rod slidably connected inside the external connecting seat, a fixed mounting block fixedly connected to the sliding limiting rod, a mounting limiting plate fixedly connected to one end of the sliding limiting rod, and a first return spring fixedly connected between the external connecting seat and the growth connecting cylinder. The fixed mounting block is slidably connected inside the external connecting seat, the growth connecting cylinder is slidably connected inside the external connecting seat, and the first return spring pushes the growth connecting cylinder to move along a preset direction.

[0011] In the preferred embodiment of this technical solution, the external connector has a limiting groove at the corresponding position of the fixed mounting block, and the fixed mounting block is slidably connected inside the limiting groove.

[0012] Based on the preferred embodiment of this technical solution, the guiding component includes a root guiding groove installed on the growth connecting tube, air holes opened inside the growth connecting tube, and a partition fixedly connected to the growth connecting tube.

[0013] Based on the preferred embodiment of this technical solution, a number of root guide grooves are provided, and the number of root guide grooves are evenly installed on the growth connecting cylinder.

[0014] Based on the preferred embodiment of this technical solution, a number of pores are provided, and the number of pores are evenly distributed inside the growth connecting cylinder.

[0015] According to the preferred embodiment of this technical solution, the connecting component includes a locking structure installed on the external connector, a first fixing plate fixedly connected inside the external connector, a second fixing plate fixedly connected inside the external connector, a plug rod slidably connected inside the second fixing plate, a limiting block fixedly connected to one end of the plug rod, a limiting push ring fixedly connected to the plug rod, a second return spring fixedly connected between the first fixing plate and the limiting push ring, and a toggle plate fixedly connected to one end of the plug rod. The toggle plate is slidably connected inside the external connector, the limiting block is engaged inside the external connector, and the second return spring pushes the limiting push ring to move in a preset direction.

[0016] In the preferred embodiment of this technical solution, the external connector has a slot at the corresponding position of the limiting block, and the limiting block is engaged inside the slot.

[0017] In the preferred embodiment of this technical solution, the external connector has a groove at the corresponding position of the limiting push ring, and the limiting push ring slides inside the groove.

[0018] Compared with the prior art, the beneficial effects of this utility model are: 1. The growth connecting cylinder is pushed to slide by the first reset spring, which can dynamically adapt to root growth: when the roots thicken during the growth period, it will push the growth connecting cylinder to move outward to avoid root epidermal damage caused by rigid compression; after the external force disappears, the spring can drive the growth connecting cylinder to automatically reset, always maintaining a stable root growth environment. This solves the problem that rigid structures cannot adjust the gap. The limiting groove of the external connecting seat restricts the trajectory of the fixed installation block, ensuring that the sliding limiting rod drives the growth connecting cylinder to move in the preset direction. This prevents the delicate roots in the seedling stage from deviating due to unstable guidance and growing disorderly to the outside of the cylinder wall. This breaks through the limitations of single rigid guidance and greatly improves the guiding stability and usage effect.

[0019] 2. Through the cooperation of the locking structure, insert rod, and limiting block, the external connector can be quickly assembled without tools, solving the cumbersome problem of traditional bolt connections that require tools and significantly improving assembly efficiency. The second return spring pushes the limiting ring to slide along the groove, allowing the limiting block to accurately engage with the slot. This, combined with the locking structure, forms a double fixation, ensuring a firm connection and good sealing, avoiding the defects of existing snap-fit ​​structures that are prone to substrate leakage. During disassembly, simply moving the lever plate is enough to disengage the insert rod from the slot, eliminating the need for forceful operation and solving the problem of root breakage and soil ball scattering caused by disassembling integrated structures, thus protecting the integrity of the root system. At the same time, the components are reusable, overcoming the limitation of single-use adhesive structures, reducing cultivation costs, and balancing high efficiency and environmental protection. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of one embodiment of the vegetation root guide growth tube of this utility model; Figure 2 This is a schematic diagram of the growth connecting cylinder structure of this utility model; Figure 3 This is a schematic diagram of the external connector structure of this utility model; Figure 4 This is a schematic diagram of the connecting component structure of this utility model; Figure 5 This is a schematic diagram of the external structure of the external connector of this utility model.

[0021] In the diagram: 1. External connector; 2. Limiting ring; 3. Growth connecting cylinder; 4. Connecting base; 801. Root guide groove; 802. Ventilation hole; 803. Partition; 804. Sliding limiting rod; 805. Fixed mounting block; 806. Mounting limiting plate; 807. First return spring; 901. Locking structure; 902. First fixing plate; 903. Second fixing plate; 904. Insert rod; 905. Limiting block; 906. Limiting push ring; 907. Second return spring; 908. Actuating plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides an embodiment of a plant root guide growth tube: it includes an external connecting seat 1, a limiting ring 2 fixedly connected to the bottom of the external connecting seat 1, a growth connecting tube 3 installed inside the external connecting seat 1, a connecting base 4 fixedly connected to the growth connecting tube 3, a connecting component installed between one of the external connecting seats 1 and the other external connecting seat 1, a guide component installed on the growth connecting tube 3, a sliding limiting rod 804 slidably connected inside the external connecting seat 1, a fixed mounting block 805 fixedly connected to the sliding limiting rod 804, a mounting limiting plate 806 fixedly connected to one end of the sliding limiting rod 804, and a first return spring 807 fixedly connected between the external connecting seat 1 and the growth connecting tube 3. The fixed mounting block 805 is slidably connected inside the external connecting seat 1, the growth connecting tube 3 is slidably connected inside the external connecting seat 1, and the first return spring 807 pushes the growth connecting tube 3 to move along a preset direction. By setting the first reset spring 807 to push the growth connecting cylinder 3 to move along a preset direction, the growth connecting cylinder 3 can be automatically reset after being subjected to external force, maintaining the stability of the plant root growth environment and improving the use effect of the plant root guide growth cylinder.

[0024] Please see Figure 3 A further solution based on this embodiment is as follows: the external connecting seat 1 has a limiting groove at the corresponding position of the fixed mounting block 805, and the fixed mounting block 805 is slidably connected inside the limiting groove. By providing a limiting groove at the position of the external connecting seat 1 corresponding to the fixed mounting block 805, the fixed mounting block 805 can slide within the limiting groove, thus restricting the movement trajectory of the fixed mounting block 805, ensuring that the sliding limiting rod 804 drives the fixed mounting block 805 to move stably, thereby improving the stability of the entire device structure.

[0025] Please see Figure 3A further embodiment of this solution is as follows: the guiding component includes a root guiding groove 801 installed on the growth connecting cylinder 3, an air hole 802 opened inside the growth connecting cylinder 3, and a partition 803 fixedly connected to the growth connecting cylinder 3. By providing a guiding component including the root guiding groove 801, the air hole 802, and the partition 803 on the growth connecting cylinder 3, the root guiding groove 801 can guide the plant roots to grow in a predetermined direction, the air hole 802 can ensure air circulation inside the growth connecting cylinder 3, providing a good environment for root growth, and the partition 803 can play a certain role in separation and protection, thus comprehensively improving the quality of plant root growth.

[0026] Please see Figure 2 A further aspect of this embodiment is that a plurality of root guide grooves 801 are provided, and these root guide grooves 801 are evenly installed on the growth connecting cylinder 3. By evenly providing a plurality of root guide grooves 801 on the growth connecting cylinder 3, multiple directions of growth guidance can be provided for the plant roots, making the root distribution more uniform and reasonable, which is conducive to the plant's full absorption of nutrients and water and promotes healthy plant growth.

[0027] Please see Figure 2 A further aspect of this embodiment is that a plurality of vents 802 are provided, and these vents 802 are evenly distributed inside the growth connecting tube 3. By evenly distributing a plurality of vents 802 inside the growth connecting tube 3, sufficient air circulation can be ensured in all areas inside the growth connecting tube 3, providing sufficient oxygen to the plant roots, avoiding root growth stagnation due to oxygen deficiency, and ensuring normal root metabolism and growth.

[0028] Please see Figure 2A further embodiment of this solution is as follows: the connecting component includes a latching structure 901 installed on the external connecting seat 1, a first fixing plate 902 fixedly connected inside the external connecting seat 1, a second fixing plate 903 fixedly connected inside the external connecting seat 1, a plug rod 904 slidably connected inside the second fixing plate 903, a limiting block 905 fixedly connected to one end of the plug rod 904, a limiting push ring 906 fixedly connected to the plug rod 904, a second return spring 907 fixedly connected between the first fixing plate 902 and the limiting push ring 906, and a toggle plate 908 fixedly connected to one end of the plug rod 904. The toggle plate 908 is slidably connected inside the external connecting seat 1, the limiting block 905 is engaged inside the external connecting seat 1, and the second return spring 907 pushes the limiting push ring 906 to move in a preset direction. By setting up a connecting assembly including a latching structure 901, a first fixing plate 902, a second fixing plate 903, an insert rod 904, a limiting block 905, a limiting push ring 906, a second return spring 907, and a toggle plate 908, the connection and disassembly between the two external connecting seats 1 can be realized conveniently and quickly, facilitating the installation, maintenance, and replacement of the vegetation root guide growth tube.

[0029] Please see Figure 4-5 A further solution based on this embodiment is as follows: the external connector 1 has a slot at the corresponding position of the limiting block 905, and the limiting block 905 is engaged inside the slot. By opening a slot at the position of the external connector 1 corresponding to the limiting block 905, and making the limiting block 905 engaged inside the slot, the stability of the connection between the two external connectors 1 can be enhanced, preventing loosening and detachment during use.

[0030] Please see Figure 4-5 A further solution based on this embodiment is as follows: the external connector 1 has a groove at the corresponding position of the limiting push ring 906, and the limiting push ring 906 slides inside the groove. By opening a groove at the position of the limiting push ring 906 on the external connector 1, the movement direction of the limiting push ring 906 can be restricted, ensuring that the second return spring 907 pushes the limiting push ring 906 to move stably, thereby ensuring the normal operation of the connecting assembly.

[0031] Working principle: By moving the actuating plate 908 on the external connector 1, the insertion rod 904 can slide along the second fixed plate 903. At this time, the second return spring 907 between the first fixed plate 902 and the limiting push ring 906 is compressed. After the two external connectors 1 are connected, the actuating plate 908 is released. The second return spring 907 pushes the limiting push ring 906 to slide along the slide groove, which drives the insertion rod 904 to reset, so that the limiting block 905 is accurately inserted into the slot of the external connector 1. With the help of the locking structure 901, a firm connection is completed. At the same time, the cooperation between the slide groove and the limiting push ring 906 ensures that the connection trajectory does not deviate. In the root guidance stage, after the plant is planted on the connecting base 4, the roots will grow along the root guide groove 801 on the growth connecting cylinder 3. Several evenly distributed root guide grooves 801 provide a clear channel for the roots and avoid messy entanglement. The partition 803 separates the growth space, further preventing root interference; the pores 802 inside the growth connecting tube 3 allow air circulation, providing sufficient oxygen to the roots and reducing the risk of rot. During the dynamic adaptation stage, as the roots grow thicker, they exert slight pressure on the growth connecting tube 3, pushing it to slide inside the external connecting seat 1. At this time, the sliding limit rod 804 drives the fixed mounting block 805 to slide synchronously along the limit groove of the external connecting seat 1, ensuring that the growth connecting tube 3 moves only in the preset direction and does not tilt or deviate. The first reset spring 807 between the external connecting seat 1 and the growth connecting tube 3 is compressed, generating a reverse thrust, which not only prevents the growth connecting tube 3 from sliding excessively and squeezing the roots, but also maintains the guiding constraint on the roots. At the same time, the limit retaining ring 2 prevents the growth connecting tube 3 from falling off from the bottom, ultimately achieving stable and directional root growth.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A root guide growth tube for vegetation, including an external connector (1), characterized in that: It also includes a limiting ring (2) fixedly connected to the bottom of the external connecting seat (1), a growth connecting cylinder (3) installed inside the external connecting seat (1), a connecting base (4) fixedly connected to the growth connecting cylinder (3), a connecting component installed between one of the external connecting seats (1) and the other external connecting seat (1), a guide component installed on the growth connecting cylinder (3), a sliding limiting rod (804) slidably connected inside the external connecting seat (1), a fixed mounting block (805) fixedly connected to the sliding limiting rod (804), a mounting limiting plate (806) fixedly connected to one end of the sliding limiting rod (804), and a first reset spring (807) fixedly connected between the external connecting seat (1) and the growth connecting cylinder (3). The fixed mounting block (805) is slidably connected inside the external connecting seat (1), the growth connecting cylinder (3) is slidably connected inside the external connecting seat (1), and the first reset spring (807) pushes the growth connecting cylinder (3) to move in a preset direction.

2. The vegetation root guide growth tube according to claim 1, characterized in that: The external connector (1) has a limiting groove at the corresponding position of the fixed mounting block (805), and the fixed mounting block (805) is slidably connected inside the limiting groove.

3. The vegetation root guide growth tube according to claim 1, characterized in that: The guide assembly includes a root guide groove (801) installed on the growth connecting tube (3), an air hole (802) opened inside the growth connecting tube (3), and a partition (803) fixedly connected to the growth connecting tube (3).

4. The vegetation root guide growth tube according to claim 3, characterized in that: There are several root guide grooves (801), and several root guide grooves (801) are evenly installed on the growth connecting tube (3).

5. The vegetation root guide growth tube according to claim 3, characterized in that: Several pores (802) are provided, and the several pores (802) are evenly opened inside the growth connecting cylinder (3).

6. The vegetation root guide growth tube according to claim 1, characterized in that: The connecting assembly includes a latching structure (901) installed on the external connector (1), a first fixing plate (902) fixedly connected inside the external connector (1), a second fixing plate (903) fixedly connected inside the external connector (1), a plug rod (904) slidably connected inside the second fixing plate (903), a limiting block (905) fixedly connected to one end of the plug rod (904), a limiting push ring (906) fixedly connected to the plug rod (904), a second return spring (907) fixedly connected between the first fixing plate (902) and the limiting push ring (906), and a toggle plate (908) fixedly connected to one end of the plug rod (904). The toggle plate (908) is slidably connected inside the external connector (1), the limiting block (905) is engaged inside the external connector (1), and the second return spring (907) pushes the limiting push ring (906) to move in a preset direction.

7. The vegetation root guide growth tube according to claim 6, characterized in that: The external connector (1) has a slot at the corresponding position of the limiting block (905), and the limiting block (905) is engaged inside the slot.

8. The vegetation root guide growth tube according to claim 6, characterized in that: The external connector (1) has a groove at the corresponding position of the limiting push ring (906), and the limiting push ring (906) slides inside the groove.