Self-circulating strawberry seedling raising device

Abstract

The present invention discloses a self-circulating strawberry seedling raising device, comprising a seedling support, a liquid supply mechanism, a seedling tray module and multiple groups of seedling cups. The seedling cup adopts an inverted cone structure, with a horizontal induction layer and a central axis electrode rod provided therein, and an ultrasonic atomization module provided at the bottom. The liquid supply mechanism continuously supplies liquid to the atomization module, and the atomization module atomizes the nutrient solution into micron-level fine mist, providing a high-oxygen and high-humidity environment for the strawberry root system. The central axis electrode rod and the induction electrode ring embedded in the wall of the seedling cup work together to apply an axial and horizontal composite electric field to form a local electric fog dual-field environment. This environment stimulates the proliferation of the root hairs of the strawberry seedlings, promotes the main root to grow straight downward and the lateral roots to expand evenly horizontally, realizes a three-dimensional layout of the root system, and prevents the root packing phenomenon. The present invention improves the root quality of the strawberry seedlings, shortens the seedling acclimatization period, and enhances the survival rate of transplanting. It has the advantages of high seedling raising efficiency, excellent root system structure, and significant industrial application value.

Description

Technical Field

[0001] The present invention relates to the field of agriculture, and in particular to a self-circulating strawberry seedling raising device. Background Art

[0002] As a high-value economic crop, the quality of strawberry seedling cultivation directly determines its survival rate and yield after planting. Currently, traditional strawberry seedling cultivation primarily utilizes soil cuttings and plug trays. Traditional seedling cultivation presents numerous challenges for root development. Root entanglement is a common phenomenon. Due to limited growing space and insufficient environmental guidance, the roots of seedlings encounter obstacles during growth and tend to coil and tangle along the container walls. This causes the roots to clump and entangle, severely hindering their normal expansion and respiration, disrupting their natural growth pattern. Furthermore, there is an imbalance in the development of the taproot and lateral roots. The taproot, leveraging its directional growth, rapidly extends deep into the bottom of the container, while lateral roots sprout in limited numbers. This results in a sparse root distribution, significantly reducing contact area with the soil or nutrient solution and significantly reducing nutrient and water absorption efficiency. Furthermore, the root system has a single growth direction. Without effective guidance, the roots are forced downward by gravity, making it difficult for them to expand horizontally. This results in a weak grip on the soil, poor stability after planting, and a tendency to fall over. These poor root structures prevent the strawberry seedlings from quickly expanding and reestablishing their absorption system when transplanted to the field or cultivation troughs, prolonging the seedling acclimatization period and significantly reducing their survival rate. Summary of the Invention

[0003] (1) Technical problems solved

[0004] To address the shortcomings of the prior art, the present invention aims to provide a self-circulating strawberry seedling raising device that addresses these issues. Through the coordinated design of atomization, electric fields, and a three-dimensional induction structure, the present invention systematically addresses common challenges in strawberry seedling cultivation, such as root entangling, unbalanced growth, and slow seedling growth after transplanting. An ultrasonic atomization module generates fine nutrient mist particles, providing a medium-free, highly oxygenated growth environment for the roots. This prevents root coiling ("entangling") caused by contact with the container walls. Simultaneously, a central electrode rod and induction electrode rings embedded in the horizontal induction layer work together to form a three-dimensional induction field within the seedling cup, combining axial and horizontal electric fields. This precisely guides the taproot to penetrate deeply vertically along the electrode rod, encouraging lateral roots to germinate and expand evenly around the electrode rings, achieving a three-dimensional root system layout. Furthermore, the mist particles are locally focused by the electric field to form a microstrip charged mist layer, significantly stimulating root hair proliferation and root cell metabolic activity, thereby improving the root system's oxygen and nutrient absorption efficiency. The strawberry seedlings induced and cultivated in this way have dense and reasonably distributed roots and strong grip. After transplanting, they can quickly stretch and re-establish the absorption system, thereby shortening the seedling acclimatization period, improving the survival rate and subsequent yield, and breaking through the root structure bottleneck of existing seedling cultivation technology.

[0005] (2) Technical solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a self-circulating strawberry seedling raising device, comprising a seedling raising support and a liquid supply mechanism, characterized in that a seedling raising tray module is fixed to the upper end of the seedling raising support, a plurality of seedling raising cups are clamped on the upper end of the seedling raising tray module, an ultrasonic atomization module is provided at the lower end of the seedling raising cup, and a central axis electrode rod is provided at the bottom of the seedling raising cup;

[0007] Preferably, the seedling cup is in an inverted cone shape as a whole, a horizontal induction layer is provided in the middle section of the cup wall of the seedling cup, an upward hollow conical boss is provided on the inner edge of the bottom of the seedling cup, an aerosol diversion groove is provided on the side of the conical boss, and a water guide hole is provided in the shape of a ring at the bottom of the seedling cup to facilitate the discharge of excess liquid and prevent water stagnation from affecting the air permeability of the roots.

[0008] Preferably, the outer edge array of the seedling cup is provided with penetrating aerial root holes.

[0009] Preferably, the ultrasonic atomization module includes a base bracket, the top of the base bracket is clamped with an ultrasonic atomization piece, the lower end of the base bracket is fixed with a sleeve, a cotton swab is provided inside the sleeve, and the terminal of the ultrasonic atomization piece is connected to the driving board.

[0010] Preferably, a liquid inlet is provided on the bottom side of the sleeve.

[0011] Preferably, the horizontal induction layer includes an annular inner groove filled with coconut husk fiber or polylactic acid mesh, and an induction electrode ring is embedded in the bottom of the annular inner groove. The induction electrode ring itself is not directly powered. Instead, when the central axis electrode rod set in the center of the seedling cup is energized, the spatial electric field causes the electrode ring to be induced in the electric field, thereby forming an annular induced electric field.

[0012] Preferably, the liquid supply mechanism includes a liquid storage tank, a liquid supply pump is provided inside the liquid storage tank, a liquid supply pipe is provided at the output end of the liquid supply pump, and the liquid supply pipe runs through the seedling tray module.

[0013] Preferably, the central axis electrode rod passes through the ultrasonic atomization module to the bottom of the conical boss, and an insulating sleeve is provided on the outer edge of the central axis electric shock rod.

[0014] Preferably, the seedling tray module includes a chassis and a top cover, and multiple groups of grids are provided at the bottom of the chassis, and liquid separation grooves are provided between the grids.

[0015] Preferably, the chassis is a double-layer structure with an electrical cavity provided at the bottom.

[0016] (3) Beneficial effects

[0017] The object of the present invention is to provide a self-circulating strawberry seedling raising device. Through the innovative combination of atomization, electric field and three-dimensional induction structure, the device significantly improves the traditional problems of disordered root structure, severe root packing and insufficient lateral root development in the process of strawberry seedling raising, and has outstanding practical effects and industrial value. First, the present invention adopts an ultrasonic atomization module to atomize the nutrient solution into micron-level fine mist, providing a high-oxygen, high-humidity and medium-free growth environment for the roots of strawberry seedlings, fundamentally avoiding the roots from contacting and circling with the container wall, and effectively preventing the "root packing" phenomenon. Secondly, the axial and horizontal electric fields are applied in coordination with the central axis electrode rod and the horizontal induction electrode ring to accurately guide the vertical growth of the main root and the annular expansion of the lateral root, realizing a three-dimensional layout of the root system, and completely breaking the problem of the root system unilaterally pointing downward and having a loose structure in traditional seedling raising. At the same time, the mist particles are focused into a local microstrip charged mist layer under the action of the electric field, which strongly stimulates the proliferation of root hairs, improves the water and fertilizer absorption efficiency and respiratory activity of the root system, and significantly improves the root density of the seedlings. The strawberry seedlings bred by the present invention have thick roots, strong grip and reasonable distribution. After transplanting, they can quickly stretch and rebuild the absorption system. The seedling acclimatization period is shortened by more than 30%, and the survival rate is increased by 10-20%, which effectively guarantees subsequent high and stable yields, significantly improves the economic benefits of the strawberry industry and the standardization level of seedling cultivation, and has significant promotion and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the entirety of a self-circulating strawberry seedling raising device of the present invention;

[0019] Figure 2 Schematic diagram of a liquid supply mechanism in a self-circulating strawberry seedling raising device of the present invention;

[0020] Figure 3 This is a schematic diagram of a seedling tray module in a self-circulating strawberry seedling raising device of the present invention;

[0021] Figure 4 This is a schematic diagram of a chassis in a self-circulating strawberry seedling raising device according to the present invention;

[0022] Figure 5 This is a cross-sectional view of a seedling cup in a self-circulating strawberry seedling raising device according to the present invention;

[0023] Figure 6 This is an enlarged view of the cross-sectional view A of the seedling cup in a self-circulating strawberry seedling raising device of the present invention;

[0024] Figure 7 This is a cross-sectional view of a single layer in a self-circulating strawberry seedling raising device of the present invention;

[0025] Figure 8 This is an enlarged view of point B in the cross-sectional view of a single layer in the self-circulating strawberry seedling raising device of the present invention;

[0026] Figure 9This is a schematic diagram of an ultrasonic atomization module and a central axis electrode rod in a self-circulating strawberry seedling raising device of the present invention;

[0027] In the figure: 1-seedling support, 2-liquid supply mechanism, 3-seedling tray module, 4-seedling cup, 5-ultrasonic atomization module, 6-central axis electrode rod, 21-liquid storage tank, 22-liquid supply pump, 23-liquid supply pipeline, 31-chassis, 32-top cover, 311-grid, 312-liquid separation tank, 313-electrical cavity, 41-horizontal induction layer, 42-conical boss, 43-aerosol diversion tank, 44-water guide hole, 45-aerial root hole, 51-base bracket, 52-ultrasonic atomization sheet, 53-sleeve, 54-cotton swab, 55-driving plate, 61-insulating sleeve, 531-liquid inlet, 411-annular inner groove, 412-induction electrode ring. DETAILED DESCRIPTION

[0028] The following is a combination of the examples of the present invention Figure 1-Figure 7 A clear and complete description of the technical solutions in the embodiments of the present invention is provided. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The present invention provides a technical solution:

[0030] A self-circulating strawberry seedling raising device includes a seedling raising support 1 and a liquid supply mechanism 2. A seedling raising tray module 3 is fixed to the upper end of the seedling raising support 1. A plurality of seedling raising cups 4 are clamped on the upper end of the seedling raising tray module 3. An ultrasonic atomization module 5 is provided at the lower end of the seedling raising cup 4. A central axis electrode rod 6 is provided at the bottom of the seedling raising cup 4.

[0031] The seedling cup 4 is in an inverted cone shape. A horizontal induction layer 41 is provided in the middle of the cup wall of the seedling cup 4. An upward hollow conical boss 42 is provided on the inner edge of the bottom of the seedling cup 4. An aerosol diversion groove 43 is provided on the side of the conical boss 42. A water guide hole 44 is provided in an annular shape on the bottom of the seedling cup 4. An array of aerial root holes 45 are provided on the outer edge of the side of the seedling cup 4.

[0032] The seedling support 1 is used to support the seedling tray module 3 and multiple groups of seedling cups 4 as a whole, providing a stable structural foundation to ensure the stability and safety of the device during the seedling raising process. The liquid supply mechanism 2 continuously supplies liquid nutrient solution to the ultrasonic atomization module 5, and forms a closed-loop circulation through pumping and pipe transportation to achieve atomization supply during the seedling raising process, improve water use efficiency and prevent liquid waste. The seedling tray module 3 serves as the mounting base for the seedling cup 4. A plurality of seedling cups are arranged in order and fixed on the tray body through a snap-on structure. At the same time, a liquid diversion and distribution structure is provided inside to assist in the liquid supply and drainage management during the seedling raising process. The seedling cup 4 directly supports the strawberry seedling plant and the root growth space. The overall inverted cone design is conducive to limiting the longitudinal excessive growth of the main root, promoting the distribution and expansion of lateral roots, inhibiting the "packing" phenomenon, and improving the quality of the root structure. The ultrasonic atomization module 5 atomizes the liquid nutrient solution provided by the liquid supply mechanism 2 into fine water mist at high speed, and continuously releases it into the seedling cup 4, providing a moist and oxygen-rich environment for the roots of the strawberry seedlings, avoiding water retention, and promoting root respiration and nutrient absorption.

[0033] The central electrode rod 6 is positioned at the center bottom of the seedling cup 4. By applying power, it generates a weak low-frequency electric field, which induction drives the induction electrode ring (located in the horizontal induction layer) in the middle section of the cup wall. This in turn guides the growth direction of the strawberry seedling's roots, encouraging the main root to expand downward and the lateral roots to expand circumferentially, thereby improving the rationality and strength of the overall root structure. The central electrode rod 6 extends from the ultrasonic atomization module 5 to the conical boss 42 at the bottom of the seedling cup. An insulating sleeve 61 is provided on its outer edge. The central electrode rod 6 and the top of the insulating sleeve 61 are provided with exposed sections, so that the central electrode rod 6 releases the electric field only in this specific exposed section, preventing current leakage. This prevents direct contact between the electrode rod and the liquid or the cup body, thereby preventing short circuits or leakage.

[0034] The horizontal induction layer 41 includes an annular inner groove 411 . The annular inner groove 411 is filled with coconut husk fiber or polylactic acid mesh. An induction electrode ring 412 is embedded in the bottom of the annular inner groove 411 .

[0035] Coconut coir or PLA mesh, with its slightly hygroscopic and porous structure, provides tangible physical support points for the lateral roots of strawberry seedlings. Roots tend to crawl and differentiate along these moist, porous fibers or meshes during growth. This encourages lateral roots to spread horizontally rather than rooting downwards, preventing the "root coiling" (where roots curl around at the bottom) common in traditional strawberry seedling cups. It also creates a three-dimensional root distribution, improving grip during transplanting.

[0036] Mist particle aggregation and moisturizing effect: Since coconut coir and PLA mesh have microporous and capillary structures, they can effectively absorb and temporarily store the fine mist particles released by the ultrasonic atomization module 5: Under the action of the electric field, these filling materials become a mist particle aggregation layer, extending the residence time of the mist particles near the induction layer; forming a local high humidity and high mist concentration area, directly stimulating the differentiation of the root system passing through this layer.

[0037] Electric field micro-balancing buffering effect: The induction electrode ring 412 is embedded in the bottom of the filling structure, and the coconut fiber or PLA mesh serves as an electrically insulating micro-medium. During electric field excitation, it can micro-buffer the local electric field distribution to avoid the appearance of "hot spots" where the electric field is excessively concentrated near the electrode ring; it helps to form a ring-shaped uniform electric field, thereby achieving precise stimulation of the horizontal and uniform expansion of the lateral roots.

[0038] The conical boss 42 is located at the center of the bottom of the seedling cup 4 and is hollow and protrudes upward. This structure physically blocks the roots from directly penetrating into the bottom of the cup, while providing installation space for the central axis electrode rod 6. Combined with the electric field effect, it further guides the root layout and suppresses the problem of packing. The aerosol diversion groove 43 is opened on the side of the conical boss 42 to guide the water mist generated by the ultrasonic atomization module 5 to be evenly dispersed inside the seedling cup 4, ensuring the uniformity of humidity in each area of ​​the cup cavity and promoting the three-dimensional balanced growth of the root system. The water guide holes 44 are distributed in a ring at the bottom of the seedling cup 4 to discharge excess liquid and prevent water accumulation in the cup from causing root soaking, lack of oxygen and rot, while maintaining a suitable moist environment and cooperating with atomization maintenance. The aerial root hole 45 array is arranged on the cup wall at the outer edge of the seedling cup 4 to improve the overall air permeability of the seedling cup. When there is local hypoxia or high humidity, it stimulates the strawberry seedlings to form aerial roots, enhances the stress tolerance of the plant, and improves the survival adaptability of the plant after later planting.

[0039] The ultrasonic atomization module 5 includes a base bracket 51, with an ultrasonic atomization plate 52 clamped to the top of the base bracket 51. A sleeve 53 is fixed to the lower end of the base bracket 51. A cotton swab 54 is disposed inside the sleeve 53. The terminal of the ultrasonic atomization plate 52 is connected to a drive board 55. A liquid inlet 531 is provided on the bottom side of the sleeve 53.

[0040] The base bracket 51 serves as the supporting frame of the entire ultrasonic atomization module 5, providing structural support and positioning reference, so that the ultrasonic atomization piece 52, the sleeve 53 and other parts can be firmly assembled, and at the same time, it is convenient for the entire module to be docked and installed with the bottom of the seedling cup 4.

[0041] The ultrasonic atomizer 52 is the core atomizer component. The high-frequency electrical signal provided by the drive plate 55 excites the vibration of the sheet and quickly atomizes the liquid nutrient solution adsorbed on the end of the cotton swab 54 into fine-particle water mist. The water mist has a fine particle size, which helps the strawberry seedlings absorb it through the roots and avoids water damage caused by traditional irrigation. The sleeve 53 is fixedly mounted at the lower end of the base bracket 51, serving as a guide shell for the cotton swab 54 and also assuming the function of a liquid channel. The liquid is introduced into the sleeve 53 through the liquid inlet 531 and is adsorbed by the cotton swab 54 to the atomizer 52 to achieve continuous liquid supply. The cotton swab 54 is made of a material with strong liquid absorption and good liquid conduction performance. It is installed in the sleeve 53 and continuously guides the nutrient solution provided by the liquid supply mechanism 2 to the vibration surface of the ultrasonic atomizer 52 through capillary action, ensuring that the atomization process is stable and continuous, and there is no liquid mist interruption. The drive plate 55 is responsible for converting the external low-voltage power supply into the high-frequency electrical signal required by the ultrasonic atomizer 52, and the operating frequency is in the range of 1.7MHz-2.4MHz. The drive board 55 is equipped with a constant current control system to ensure stable output and extend the life of the atomizer. The liquid inlet 531 is located on the bottom side of the sleeve 53 and is used to connect to an external liquid supply pipeline to introduce the nutrient solution delivered by the liquid supply mechanism 2 into the sleeve 53. The side design prevents liquid from directly impacting the cotton swab 54, facilitating smooth aspiration and atomization.

[0042] The liquid supply mechanism 2 includes a liquid reservoir 21, within which a liquid supply pump 22 is located. A liquid supply pipe 23 is provided at the output end of the liquid supply pump 22, which extends through the seedling tray module 3. The liquid reservoir 21 stores nutrient solution. The liquid supply pump 22 pressurizes and delivers the nutrient solution. The liquid supply pipe 23 extends through the seedling tray module 3, supplying nutrient solution to each seedling cup 4 and ensuring self-circulating operation of the system.

[0043] The seedling tray module 3 consists of a chassis 31 and a top cover 32. A plurality of grids 311 are provided at the bottom of the chassis 31 to support and position a plurality of seedling cups 4. Liquid distribution troughs 312 are arranged between the grids 311 to ensure that the nutrient solution is evenly distributed to the bottom of each seedling cup, thereby improving the liquid supply efficiency. The chassis 31 is a double-layer structure with an electrical cavity 313 at the bottom. The cavity is used to accommodate electrical components such as the drive board 55, power supply circuits and controllers, so as to realize system power supply and control functions such as atomization and sensing.

[0044] The combined action mechanism and special effects of the present invention

[0045] 1. The present invention innovatively combines the ultrasonic atomization module 5 with the electric field excitation structure (central axis electrode rod 6 and induction electrode ring 412) to establish a mist particle-electric field dual-field coupling environment inside the seedling cup 4, producing a special root stimulation effect.

[0046] Specifically, when the ultrasonic atomization module 5 is operating, it uses ultrasonic vibrations to break down the nutrient solution into fine mist particles with a diameter of approximately 1 to 5 microns. These mist particles carry a weak negative charge upon formation due to the charge separation effect during droplet breakup and cavitation, making them naturally slightly charged mist particles. In traditional aeroponic systems, these charged mist particles are randomly distributed and lack directionality, resulting in limited root stimulation effects.

[0047] The present invention forms a vertical and horizontal superimposed electric field inside the cup by providing a central electrode rod 6 (located at the central axis of the cup) and an induction electrode ring 412 (located at the horizontal induction layer of the seedling cup wall). When the electric field is applied, the mist particles will undergo directional migration and aggregation and redistribution under the action of the electric field force; specifically,

[0048] The slightly charged mist particles migrate toward the electrode rod 6 and near the induction electrode ring 412, forming a high-density, slightly charged mist layer in the local space around the electrodes. This localized, slightly charged mist layer is essentially a high-humidity, high-electricity induction zone under the focused electric field, directly affecting the roots of the strawberry seedlings growing in the cup.

[0049] Furthermore, according to plant physiology research, strawberry root hair cells are highly sensitive to high humidity environment + weak electric field stimulation: high humidity mist can promote rapid differentiation of root hairs; weak electric field stimulation can activate changes in the membrane potential of root hair cells, promote the activity of ion channels such as calcium ions and potassium ions, and thereby enhance the elongation and differentiation of root hairs.

[0050] Therefore, under the "electricity + fog" dual-field coupling stimulation of the present invention, the roots of strawberry seedlings show the following novel effects: the number of root hairs is significantly increased, and the root surface area is expanded; the elongation speed of root hairs is increased, and the ability to absorb water and fertilizer is enhanced; the root hairs are more evenly distributed and dense, which promotes the improvement of the vitality of the whole seedling.

[0051] 2. This device uses the central electrode rod 6 to provide a vertical electric field, and cooperates with the induction electrode ring 412 to generate a horizontal annular electric field, thereby achieving three-dimensional spatial induction of the strawberry root system and forming a three-dimensional spatial induction rooting mechanism:

[0052] The taproot, located around the central electrode rod 6, is guided by the axial electric field lines, which encourage it to grow straight and downward, maintaining robust growth and facilitating its penetration into the soil during subsequent transplanting. Lateral roots, distributed along the horizontal plane of the induction electrode ring 412, are stimulated by the annular electric field. Simultaneously, this plane has the highest concentration of fog particles, leading to active water absorption by the lateral roots, resulting in a uniform, circular, and horizontally expanding growth pattern. This zoning and induction of the electric field achieves a three-dimensional spatial layout of the strawberry seedling root system, increasing root density, significantly reducing root entanglement, improving cup space utilization, and enhancing the root system's tensile strength and grip.

[0053] 3. Mechanism of improving root oxygen respiration function

[0054] The water mist generated by the ultrasonic atomization module 5 has a small particle size and a high oxygen content, forming an oxygen-rich microenvironment, which is beneficial to the respiratory metabolism of the root system. Secondly, the weak electric field stimulation in the present invention can slightly change the plasma membrane potential of the root cells and improve the efficiency of oxygen absorption by the root cells. Studies have shown that weak electric field stimulation can improve the efficiency of ATP production in the mitochondria of root cells and enhance the oxygen utilization capacity of the roots. The combined effect of this mist oxygen environment + electric field stimulation enables the roots of strawberry seedlings to have stronger transplant resistance, higher waterlogging resistance and faster growth rate.

[0055] Working principle:

[0056] The present invention provides a self-circulating strawberry seedling raising device, which realizes the optimized induction and growth control of the root structure of strawberry seedlings through the coupling effect of three major mechanisms: electrophysiological stimulation, ultrasonic atomization feeding, and three-dimensional space induction.

[0057] First, the seedling cup 4 is designed as an inverted cone. A horizontal induction layer 41 is located in the middle of the cup wall. This layer includes an embedded induction electrode ring 412 and a fiber material filling, which is used to induce the strawberry seedlings' roots to expand horizontally along the cup wall. An upwardly protruding conical boss 42 is located inside the cup bottom, effectively preventing roots from coiling and taking root. Meanwhile, aerosol diversion grooves 43 on the side of the cone guide the aerosol to be evenly distributed, promoting balanced root growth in three-dimensional space.

[0058] An ultrasonic atomizer module 5, located at the bottom of the device, atomizes the liquid nutrient solution to produce a fine mist, continuously nourishing the roots of the seedlings in the seedling cup and improving the uniformity of the substrate moisture. The atomizer module is centrally located below the seedling cup, coaxially aligned with the central electrode rod 6 at the cup's base, ensuring spatial symmetry and consistency between the aerosol and electric field.

[0059] The central electrode rod 6 extends through the conical boss at the bottom of the seedling cup and, powered by an external low-frequency power supply, releases a weak current with an extremely low frequency of 0.5Hz to 10Hz and a safe low voltage of less than 1V into the cup cavity, creating a stable electric field environment. The induction electrode ring 412 in the seedling cup wall is induced and charged by the electrode rod, forming a closed low-frequency electric field. This electric field regulates the growth direction and auxin distribution of the strawberry seedling root system, inducing the main root to extend toward the central axis and promoting the circular expansion of lateral roots along the cup wall, thereby achieving a "vertical and horizontal" three-dimensional expansion of the root system.

[0060] In addition, the aerial root holes 45 arranged in an array on the cup wall improve the aeration of the cup body, so that the roots can be stimulated to generate aerial roots when there is local hypoxia, further enhancing the stress resistance of the strawberry seedlings and the root grip.

[0061] The overall device circulates the supply of atomized liquid through the liquid supply mechanism 2 at the lower end, realizing self-circulating supply during the seedling cultivation process, which not only saves water and fertilizer, but also avoids problems such as water accumulation in the substrate and root hypoxia caused by traditional irrigation.

[0062] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A self-circulating strawberry seedling raising device, comprising a seedling raising support (1) and a liquid supply mechanism (2), characterized in that: A seedling tray module (3) is fixed to the upper end of the seedling support (1), a plurality of seedling cups (4) are clamped to the upper end of the seedling tray module (3), an ultrasonic atomization module (5) is provided at the lower end of the seedling cup (4), and a central axis electrode rod (6) is provided at the bottom of the seedling cup (4); The seedling cup (4) is in an inverted cone shape as a whole, a horizontal induction layer (41) is provided in the middle section of the cup wall of the seedling cup (4), an upward hollow conical boss (42) is provided on the inner edge of the bottom of the seedling cup (4), an aerosol diversion groove (43) is provided on the side of the conical boss (42), and a water guide hole (44) is provided in an annular shape on the bottom of the seedling cup (4); The horizontal induction layer (41) comprises an annular inner groove (411), the annular inner groove (411) is filled with coconut chaff fiber or polylactic acid mesh, and an induction electrode ring (412) is embedded in the bottom of the annular inner groove (411); The central axis electrode rod (6) is powered by an external low-frequency power supply and releases a weak current with an extremely low frequency of 0.5 Hz to 10 Hz and a safety low voltage of less than 1 V into the cup cavity; The ultrasonic atomization module (5) comprises a base bracket (51), an ultrasonic atomization sheet (52) is clamped on the top of the base bracket (51), a sleeve (53) is fixed to the lower end of the base bracket (51), a cotton swab (54) is provided inside the sleeve (53), and a terminal of the ultrasonic atomization sheet (52) is connected to a driving board (55); The central axis electrode rod (6) passes through the ultrasonic atomization module (5) to the bottom of the conical boss (42), and an insulating sleeve (61) is provided on the outer edge of the central axis electrode rod (6); The induction electrode ring (412) in the wall of the seedling raising cup (4) is induced and charged under the action of the central axis electrode rod (6), thereby forming a closed low-frequency electric field.

2. A self-circulating strawberry seedling raising device according to claim 1, characterized in that: The outer edge of the side of the seedling cup (4) is provided with an array of penetrating aerial root holes (45).

3. A self-circulating strawberry seedling raising device according to claim 1, characterized in that: A liquid inlet (531) is provided on the bottom side of the sleeve (53).

4. A self-circulating strawberry seedling raising device according to claim 1, characterized in that: The liquid supply mechanism (2) comprises a liquid storage tank (21), a liquid supply pump (22) is provided inside the liquid storage tank (21), a liquid supply pipe (23) is provided at the output end of the liquid supply pump (22), and the liquid supply pipe (23) passes through the seedling tray module (3).

5. The self-circulating strawberry seedling raising device according to claim 1, characterized in that: The seedling tray module (3) comprises a bottom tray (31) and a top cover (32); a plurality of grids (311) are provided at the bottom of the bottom tray (31), and liquid separation grooves (312) are provided between the grids (311).

6. A self-circulating strawberry seedling raising device according to claim 5, characterized in that: The chassis (31) is a double-layer structure, with an electrical cavity (313) provided at the bottom.

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