Self-circulation strawberry seedling raising device

Abstract

The invention discloses a self-circulation strawberry seedling raising device which comprises a seedling raising support, a liquid supply mechanism, a seedling raising plate module and a plurality of seedling raising cups. The seedling cup is of an inverted-cone-shaped structure, a horizontal induction layer and a middle-axis electrode bar are arranged in the seedling cup, and an ultrasonic atomization module is arranged at the bottom. The liquid supply mechanism continuously supplies liquid to the atomization module, the atomization module atomizes the nutrient solution into micron-sized mist, and a high-oxygen and high-humidity environment is provided for strawberry roots. The center shaft electrode bar and the induction electrode ring embedded in the seedling cup wall act synergistically, an axial and horizontal composite electric field is applied, and a local electric mist double-field environment is formed. The environment stimulates strawberry seedling root hair proliferation, promotes straight downward growth of main roots and uniform and horizontal expansion of lateral roots, realizes three-dimensional layout of root systems, and prevents a root packing phenomenon. The strawberry seedling root system quality is improved, the seedling recovery period is shortened, the planting survival rate is increased, and the method has the advantages of high seedling raising efficiency, excellent root system structure and remarkable industrial application value.

Description

Technical Field

[0001] The 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 cultivation during the seedling stage directly determines the survival rate and yield of later planting. At present, traditional strawberry seedling cultivation mainly adopts soil cutting seedling cultivation and plug tray substrate seedling cultivation. In the traditional seedling cultivation process, the root development of strawberry seedlings faces many difficulties. The phenomenon of "root coiling" occurs frequently. Due to the limitation of growth space and insufficient environmental guidance, the roots of seedlings are easily entangled along the wall of the container after encountering obstacles during the growth process, causing the roots to gather into balls and the roots to be entangled, which seriously hinders the normal extension and breathing of the roots and destroys their natural growth form. At the same time, the development of the taproot and lateral roots is unbalanced. The taproot quickly grows deep and elongates to the bottom of the seedling container by virtue of its growth tendency, while the number of lateral roots is small, making the overall distribution of the root system sparse, and the contact area with the soil or nutrient solution is greatly reduced, which greatly reduces the absorption efficiency of nutrients and water. In addition, the root system has a single growth direction. In the absence of effective guidance, the roots are only affected by gravity and grow downwards, making it difficult to expand horizontally. This causes the strawberry seedlings to have a weak grip on the ground, poor stability after planting, and prone to lodging. These poor root structures make it difficult for strawberry seedlings to quickly expand and re-establish the absorption system when transplanted to the field or cultivation troughs, which not only prolongs the seedling acclimatization period, but also significantly reduces the survival rate, seriously restricting the economic benefits and sustainable development of the strawberry industry. Summary of the invention

[0003] 1. Technical issues to be resolved In view of the shortcomings of the prior art, the present invention aims to provide a self-circulating strawberry seedling raising device, which solves the problems existing in the prior art. The present invention systematically solves the common problems of root entangling, development imbalance and transplanting slow seedling in the process of strawberry seedling raising through the coordinated design of atomization, electric field and three-dimensional induction structure. The ultrasonic atomization module is used to generate fine nutrient mist particles, which provides a medium-free and highly oxygenated growth environment for the root system, and avoids the phenomenon of the root system coiling and circling ("entangling") due to contact with the container wall from the source. At the same time, the central axis electrode rod and the induction electrode ring embedded in the horizontal induction layer work together to form a three-dimensional induction field in which the axial and horizontal electric fields are superimposed in the seedling cup, accurately guiding the main root to vertically penetrate deep along the direction of the central axis electrode rod, and promoting the lateral roots to germinate and expand evenly at the horizontal surrounding of the electrode ring, so as to realize the three-dimensional layout of the root system. In addition, the mist particles are locally focused under the action of the electric field to form a microstrip electric mist layer, which significantly stimulates the proliferation of root hairs and the metabolic activity of root cells, and improves the absorption efficiency of oxygen and nutrients by the root system. 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.

[0004] (II) Technical Solution To achieve the above object, the present invention provides the following technical solution: a self-circulating strawberry seedling raising device, including a seedling raising support and a liquid supply mechanism. A seedling raising tray module is fixed at the upper end of the seedling raising support. Multiple groups of seedling cups are snap-connected to the upper end of the seedling raising tray module. An ultrasonic atomization module is arranged at the lower end of the seedling cup, and a central axis electrode rod is arranged at the bottom of the seedling cup; Preferably, the whole seedling cup is in an inverted conical shape. A horizontal induction layer is arranged in the middle section of the cup wall of the seedling cup. A hollow upward conical boss is arranged at the inner edge of the bottom of the seedling cup. An aerosol diversion groove is arranged on the side of the conical boss. Water guide holes are arranged in a ring shape at the bottom of the seedling cup. It is convenient for redundant liquid to drain out, preventing water accumulation from affecting the air permeability of the roots.

[0005] Preferably, through air root holes are arranged in an array on the outer edge of the seedling cup.

[0006] Preferably, the ultrasonic atomization module includes a base support. An ultrasonic atomization sheet is snap-connected to the top of the base support. A sleeve is fixed at the lower end of the base support. A cotton swab is arranged inside the sleeve. The terminal of the ultrasonic atomization sheet is connected to a driving board.

[0007] Preferably, a liquid inlet is arranged on the side at the bottom of the sleeve.

[0008] Preferably, the horizontal induction layer includes an annular inner groove. Coconut coir fiber or polylactic acid mesh is filled in the annular inner groove. An induction electrode ring is embedded at the bottom of the annular inner groove. The induction electrode ring itself is not directly powered. Instead, when the central axis electrode rod arranged at the center of the seedling cup is electrified, through the action of the space electric field, the electrode ring is induced to be charged in the electric field, thus forming an annular induction electric field.

[0009] Preferably, the liquid supply mechanism includes a liquid storage tank. A liquid supply pump is arranged inside the liquid storage tank. The output end of the liquid supply pump is provided with a liquid supply pipeline. The liquid supply pipeline penetrates through to the seedling raising tray module.

[0010] Preferably, the central axis electrode rod penetrates through the ultrasonic atomization module to the bottom of the conical boss, and an insulating sleeve is arranged on the outer edge of the central axis electrode rod.

[0011] Preferably, the seedling raising tray module includes a chassis and a top cover. Multiple groups of grilles are arranged at the bottom of the chassis, and a liquid distribution groove is arranged between the grilles.

[0012] Preferably, the chassis is a double-layer structure, and an electrical cavity is arranged at the bottom.

[0013] (III) Beneficial Effects 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, it significantly improves the traditional problems in the strawberry seedling raising process, such as disordered root structure, serious root coiling and insufficient lateral root development, and has outstanding practical effects and industrial value. First of all, 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, it avoids the roots contacting the container wall and forming loops, effectively preventing the "root coiling" phenomenon. Secondly, by applying axial and horizontal electric fields synergistically through the central axis electrode rod and the horizontal induction electrode ring, it accurately guides the main root to grow vertically and the lateral roots to expand circularly, realizing a three - dimensional layout of the roots and completely breaking the problem of single - direction downward growth and loose structure of the roots in traditional seedling raising. At the same time, under the action of the electric field, the fog particles focus into a locally micro - charged fog layer, strongly stimulating the proliferation of root hairs, improving the water and fertilizer absorption efficiency and respiratory activity of the roots, and significantly increasing the root density of the seedlings. The strawberry seedlings grown by the present invention have thick and strong roots, strong gripping force and reasonable distribution. After transplantation, they can quickly stretch and reconstruct the absorption system, the seedling slow - down period is shortened by more than 30%, the survival rate is increased by 10 - 20%, effectively ensuring high and stable yields in the follow - up, significantly improving the economic benefits and seedling raising standardization level of the strawberry industry, and having significant promotion and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the whole in a self - circulating strawberry seedling raising device of the present invention; Figure 2 is a schematic diagram of the liquid supply mechanism in a self - circulating strawberry seedling raising device of the present invention; Figure 3 is a schematic diagram of the seedling tray module in a self - circulating strawberry seedling raising device of the present invention; Figure 4 is a schematic diagram of the chassis in a self - circulating strawberry seedling raising device of the present invention; Figure 5 is a cross - sectional view of the seedling cup in a self - circulating strawberry seedling raising device of the present invention; Figure 6 is an enlarged view of part A in the cross - sectional view of the seedling cup in a self - circulating strawberry seedling raising device of the present invention; Figure 7 is a cross - sectional view of a single layer in the whole of a self - circulating strawberry seedling raising device of the present invention; Figure 8 is an enlarged view of part B in the cross - sectional view of a single layer in the whole of a self - circulating strawberry seedling raising device of the present invention; Figure 9 is a schematic diagram of the ultrasonic atomization module and the central axis electrode rod in a self - circulating strawberry seedling raising device of the present invention; In the figure: 1 - seedling-raising support, 2 - liquid supply mechanism, 3 - seedling-raising tray module, 4 - seedling-raising 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 - grille, 312 - liquid distribution tank, 313 - electrical cavity, 41 - horizontal induction layer, 42 - conical boss, 43 - aerosol diversion groove, 44 - water guide hole, 45 - air root hole, 51 - base support, 52 - ultrasonic atomization sheet, 53 - sleeve, 54 - cotton swab, 55 - drive board, 61 - insulating sleeve, 531 - liquid inlet, 411 - annular inner groove, 412 - induction electrode ring. Detailed implementation mode

[0015] The following will combine the attached drawings in the examples of the present invention Figures 1-7 The technical solutions in the embodiments of the present invention will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0016] The present invention provides a technical solution: A self-circulating strawberry seedling-raising device, comprising a seedling-raising support 1 and a liquid supply mechanism 2. The upper end of the seedling-raising support 1 is fixed with a seedling-raising tray module 3. Multiple groups of seedling-raising cups 4 are clamped on the upper end of the seedling-raising tray module 3. An ultrasonic atomization module 5 is arranged at the lower end of the seedling-raising cup 4, and a central axis electrode rod 6 is arranged at the bottom of the seedling-raising cup 4; The whole seedling-raising cup 4 is in an inverted conical shape. A horizontal induction layer 41 is arranged in the middle section of the cup wall of the seedling-raising cup 4. An upwardly hollow conical boss 42 is arranged at the inner edge of the bottom of the seedling-raising cup 4. An aerosol diversion groove 43 is arranged on the side of the conical boss 42. Water guide holes 44 are arranged in a ring at the bottom of the seedling-raising cup 4. Air root holes 45 are arranged in an array on the outer edge of the side of the seedling-raising cup 4.

[0017] The seedling-raising support 1 is used to support the seedling-raising 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, forming a closed-loop cycle through pumping and pipeline transportation to achieve atomized oxygen supply during the seedling-raising process, improving water use efficiency and preventing liquid waste. The seedling-raising tray module 3 serves as the installation base for the seedling cups 4. Multiple seedling cups are orderly arranged and fixed on the tray body through a clamping 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 bears the growth space for strawberry seedlings and their roots. The overall design is an inverted cone shape, which is beneficial to restricting the excessive longitudinal growth of the main root, promoting the expansion of lateral root distribution, inhibiting the "root coiling" phenomenon, and improving the quality of the root system 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 strawberry seedling roots, avoiding water retention, promoting root respiration and nutrient absorption.

[0018] The central axis electrode rod 6 is arranged at the center bottom of the seedling cup 4. By energizing, a low-frequency weak electric field is formed to inductively drive the induction electrode ring in the middle section of the cup wall (arranged in the horizontal induction layer), thereby guiding the growth direction of the strawberry seedling roots, promoting the main root to grow downward and the lateral roots to expand circumferentially, and improving the rationality and strength of the overall root system structure. The central axis electrode rod 6 penetrates through the ultrasonic atomization module 5 to the conical boss 42 at the bottom of the seedling cup. An insulating sleeve 61 is arranged on its outer edge. The top of the central axis electrode rod 6 and the insulating sleeve 61 has an exposed section, so that the central axis electrode rod 6 only releases the electric field at a specific exposed section, avoiding current leakage. It is used to prevent the central axis electrode rod from directly contacting the liquid or the cup body to avoid short circuit or electric leakage.

[0019] The horizontal induction layer 41 includes an annular inner groove 411 filled with coconut coir fiber or polylactic acid mesh cloth, and an induction electrode ring 412 is embedded at the bottom of the annular inner groove 411.

[0020] Coconut coir fiber or PLA mesh cloth has slight moisture absorption and a porous mesh structure, providing perceivable physical support contacts for the lateral roots of strawberry seedlings. During the growth process, the roots tend to crawl and differentiate along these moist and pore-rich fibers or mesh holes, thereby: inducing the lateral roots to expand horizontally instead of all growing downward; preventing the "root coiling" (i.e., all roots forming circles at the bottom) problem of strawberry roots in traditional seedling cups; and achieving a three-dimensional distribution of the root system, improving the grasping force during later transplantation.

[0021] Fog particle aggregation and moisturizing effect: Due to the micropores and capillary structures of coconut coir fiber and PLA mesh, they can effectively adsorb and temporarily store the fine fog particles released by the ultrasonic atomization module 5. Under the action of the electric field, these filling materials become fog particle aggregation layers, extending the residence time of fog particles near the induction layer, forming local high-humidity and high-fog-concentration areas, and directly stimulating the root differentiation of the roots passing through this layer.

[0022] Electric field micro-equilibrium buffering effect: The induction electrode ring 412 is embedded at the bottom of the filling structure. Coconut coir fiber or PLA mesh acts as an electrical insulation micro-medium. When excited by the electric field, it can micro-buffer the local electric field distribution, avoiding the "hot spots" of excessive electric field concentration near the electrode ring, and helping to form a ring-shaped uniform electric field, thus achieving precise stimulation of the horizontal and uniform expansion of lateral roots.

[0023] The conical boss 42 is located at the center of the bottom of the seedling-raising cup 4 and protrudes upward in a hollow shape. This structure physically blocks the roots from directly penetrating into the bottom of the cup, and at the same time provides an installation space for the central axis electrode rod 6. Combining with the electric field effect, it further guides the root layout and inhibits the problem of root entanglement. The aerosol diversion groove 43 is opened on the side of the conical boss 42, used to guide the water mist generated by the ultrasonic atomization module 5 to be evenly dispersed inside the seedling-raising cup 4, ensuring the same humidity in each area of the cup cavity and promoting the three-dimensional and balanced growth of roots. The water guide holes 44 are annularly distributed at the bottom of the seedling-raising cup 4, used to drain excess liquid, prevent waterlogging in the cup from causing root soaking and oxygen-deficient rot, and at the same time maintain a suitable humid environment to cooperate with atomization maintenance. The aerial root holes 45 are arranged in an array on the cup wall at the outer edge of the seedling-raising cup 4, used to improve the overall air permeability of the seedling-raising cup. When there is local hypoxia or high humidity, it stimulates the strawberry seedlings to generate aerial roots, enhancing the plant's stress tolerance and improving the survival adaptability of the plant after later planting.

[0024] The ultrasonic atomization module 5 includes a base bracket 51. The top of the base bracket 51 is snap-connected with an ultrasonic atomization sheet 52. The lower end of the base bracket 51 is fixed with a sleeve 53. A cotton swab 54 is arranged inside the sleeve 53. The terminal of the ultrasonic atomization sheet 52 is connected with a driving board 55. An inlet 531 is arranged on the bottom side of the sleeve 53.

[0025] The base bracket 51 serves as the bearing frame of the entire ultrasonic atomization module 5, providing structural support and positioning reference, firmly assembling parts such as the ultrasonic atomization sheet 52 and the sleeve 53, and at the same time facilitating the overall docking and installation of the module with the bottom of the seedling-raising cup 4.

[0026] The ultrasonic atomizing sheet 52 is the core atomizing component. Through the high-frequency electrical signal provided by the driving board 55, it stimulates the vibration of the sheet body, and quickly atomizes the liquid nutrient solution adsorbed on the end of the cotton swab 54 into fine particle water mist. The particle size of this water mist is delicate, which helps the strawberry seedling roots to absorb, and at the same time avoids the waterlogging damage of traditional irrigation. The sleeve 53 is fixedly installed at the lower end of the base bracket 51, serving as the guiding housing for the cotton swab 54 and also undertaking the function of the liquid channel. The liquid is introduced into the sleeve 53 through the liquid inlet 531, adsorbed by the cotton swab 54 to the atomizing sheet 52, and continuous liquid supply is achieved. The cotton swab 54 is made of a material with strong liquid absorption and good liquid conduction performance, 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 atomizing sheet 52 through capillary action, ensuring a stable and continuous atomization process without liquid breakage or fog interruption. The driving board 55 is responsible for converting the external low-voltage power supply into the high-frequency electrical signal required by the ultrasonic atomizing sheet 52, and the working frequency is in the range of 1.7 MHz - 2.4 MHz. The driving board 55 is equipped with constant current control to ensure stable output of the atomizing sheet and extend its service life. The liquid inlet 531 is arranged on the bottom side of the sleeve 53 for connecting an external liquid supply pipeline to introduce the nutrient solution transported in the liquid supply mechanism 2 into the interior of the sleeve 53. The position is designed on the side to avoid the liquid directly impacting the cotton swab 54, which is beneficial to stable liquid absorption and atomization.

[0027] The liquid supply mechanism 2 includes a liquid storage tank 21. A liquid supply pump 22 is arranged inside the liquid storage tank 21. The output end of the liquid supply pump 22 is provided with a liquid supply pipeline 23, and the liquid supply pipeline 22 penetrates through to the seedling cultivation tray module 3. The liquid storage tank 21 is used to store the nutrient solution. The liquid supply pump 22 is used to pressurize and transport the nutrient solution. The liquid supply pipeline 23 penetrates through to the seedling cultivation tray module 3 to realize the nutrient solution supply to each seedling cultivation cup 4, ensuring the self-circulation operation of the system.

[0028] The seedling cultivation tray module 3 includes two parts: a chassis 31 and a top cover 32. Multiple groups of grilles 311 are arranged at the bottom of the chassis 31 for supporting and positioning multiple seedling cultivation cups 4. Liquid distribution grooves 312 are arranged between the grilles 311 to ensure uniform distribution of the nutrient solution to the bottom of each seedling cultivation cup, improving the liquid supply efficiency. The chassis 31 is a double-layer structure, and an electrical cavity 313 is arranged at the bottom, which is used to accommodate electrical components such as the driving board 55, power supply lines, and controllers inside, realizing system power supply and function control such as atomization and induction.

[0029] The composite action mechanism and special effects of the present invention: 1. By innovatively applying the ultrasonic atomization module 5 and the electric field excitation structure (the central axis electrode rod 6 and the induction electrode ring 412) in combination, the present invention creates a dual-field coupling environment of fog particles - electric field inside the seedling cultivation cup 4, generating a special root stimulation effect.

[0030] Specifically, when the ultrasonic atomization module 5 is working, it uses ultrasonic vibration to refine the nutrient solution into fine mist particles with a particle size of about 1-5 microns. Due to the charge separation effect during the droplet breakup and cavitation processes, these mist particles carry a weak negative charge when formed and belong to natural micro-charged mist particles. In traditional fog cultivation systems, these charged mist particles will be randomly distributed, lacking directivity, resulting in limited root stimulation effects.

[0031] In the present invention, by setting the central axis electrode rod 6 (located on the central axis of the cup) and the induction electrode ring 412 (located on the horizontal induction layer of the seedling cup wall), a vertical + horizontal superimposed electric field is formed inside the cup. When the electric field is applied: under the action of the electric field force, the mist particles will undergo directional migration and aggregation redistribution; specifically manifested as: The micro-charged mist particles migrate towards the periphery of the central axis electrode rod 6 and near the induction electrode ring 412, forming a high-density, micro-charged mist layer in the local space around the electrodes. This local micro-charged mist layer environment is essentially a high-humidity, high-electric induction area under the focusing of the electric field, which directly acts on the strawberry seedling roots growing inside the cup.

[0032] Furthermore, according to plant physiology research, strawberry root hair cells are highly sensitive to the stimulation of a high-humidity environment + weak electric field: the high-humidity micro-mist can promote the rapid differentiation of root hairs; the weak electric field stimulation can activate the change of the root hair cell membrane potential, promote the activity of ion channels such as calcium ions and potassium ions, and further enhance the elongation and differentiation quantity of root hairs.

[0033] Therefore, under the "electricity + mist" dual-field coupling stimulation of the present invention, the strawberry seedling roots show the following novel effects: the number of root hairs is significantly increased, and the root surface area is enlarged; the elongation speed of root hairs is increased, and the water and fertilizer absorption capacity is enhanced; the root hair distribution is more uniform and dense, promoting the improvement of the vitality of the whole seedling.

[0034] 2. This device uses the central axis 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 realizing three-dimensional space induction for strawberry roots and forming a three-dimensional space induced rooting mechanism: The main root is located around the central axis electrode rod 6 and is guided by the electric field lines along the axial direction, prompting the growth direction of the main root to remain straight downwards, growing robustly, which is beneficial for deep penetration into the soil during subsequent transplantation; the lateral roots are distributed on the horizontal layer where the induction electrode ring 412 is located, and are stimulated by the annular electric field. At the same time, the concentration of mist particles is the highest at this layer, and the lateral roots absorb water actively in this area, forming a uniform annular, horizontally expanding growth trend. Through the above-mentioned electric field partition induction, a three-dimensional space layout of the strawberry seedling roots is realized, the root system density is increased, the phenomenon of root entanglement is significantly reduced, the space utilization rate of the cup is higher, and the root tensile strength and ground-gripping ability are enhanced.

[0035] 3. Root system oxygen respiration function improvement mechanism The water mist generated by the ultrasonic atomization module 5 has fine particle size and 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 cytoplasmic membrane potential of the root system, improving the efficiency of oxygen absorption by root cells. Existing research shows that weak electric field stimulation can improve the ATP generation efficiency in root cell mitochondria and enhance the oxygen utilization ability of the root system. The combined effect of this fog-cultivated oxygen environment + electric field stimulation enables the root system of strawberry seedlings to have stronger transplant tolerance, higher waterlogging resistance, and faster growth rate.

[0036] Working principle: A self-circulating strawberry seedling raising device provided by the present invention realizes the optimization induction and growth control of the root system structure of strawberry seedlings through the coupling effect of three major mechanisms: electrophysiological stimulation, ultrasonic atomization for oxygen supply, and three-dimensional space induction.

[0037] First of all, the whole design of the seedling cup 4 is in an inverted conical shape, and a horizontal induction layer 41 is provided in the middle of the cup wall. This layer includes an embedded induction electrode ring 412 and filled fiber materials, which are used to induce the root system of strawberry seedlings to expand horizontally along the cup wall. Inside the bottom of the cup, there is a conical boss 42 protruding upward. Its structure effectively prevents the roots from coiling and taking root at the bottom. At the same time, an aerosol diversion groove 43 is provided on the side of the conical platform, which is used to guide the uniform distribution of the aerosol, promoting the balanced growth of the root system in the three-dimensional space.

[0038] The ultrasonic atomization module 5 provided at the bottom of the device generates fine water mist by atomizing the liquid nutrient solution, continuously nourishing the root system of the seedlings in the seedling cup, and improving the uniformity of the substrate moisture. The atomization module is arranged in the center directly below the seedling cup, and is arranged coaxially with the central axis electrode rod 6 at the bottom of the cup, ensuring the spatial symmetry and consistency of the aerosol and electric field effects.

[0039] Among them, the central axis electrode rod 6 passes through the conical boss at the bottom of the seedling cup and is powered by an external low-frequency power supply to release a weak current with an extremely low frequency of 0.5 Hz to 10 Hz and a safe low voltage of less than 1 V into the cup cavity, forming a stable electric field environment. The induction electrode ring 412 in the seedling cup wall is inductively charged under the action of the central axis electrode rod, forming a closed low-frequency electric field. This electric field has a regulatory effect on the growth direction and auxin distribution of the root system of strawberry seedlings, inducing the main root to extend towards the central axis direction, and promoting the lateral roots to expand annularly along the cup wall, thus realizing the "vertical + horizontal" three-dimensional expansion of the root system.

[0040] In addition, the air root holes 45 arranged in an array on the cup wall improve the air permeability of the cup body, enabling the root system to stimulate the generation of air roots when locally lacking oxygen, further enhancing the stress tolerance and root gripping force of strawberry seedlings.

[0041] The overall device circulates and supplies the atomized liquid through the liquid supply mechanism 2 at the lower end, realizing self-circulating oxygen supply during the seedling cultivation process, which not only saves water and fertilizer but also avoids problems such as substrate waterlogging and root hypoxia caused by traditional irrigation.

[0042] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present 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, The upper end of the seedling-raising support (1) is fixed with a seedling-raising tray module (3). Multiple groups of seedling cups (4) are snap-connected to the upper end of the seedling-raising tray module (3). An ultrasonic atomization module (5) is arranged at the lower end of the seedling cup (4), and a central axis electrode rod (6) is arranged at the bottom of the seedling cup (4). The seedling cup (4) is integrally in an inverted conical shape. A horizontal induction layer (41) is arranged in the middle section of the cup wall of the seedling cup (4). A conical boss (42) with an upward hollow is arranged at the inner edge of the bottom of the seedling cup (4). An air mist diversion groove (43) is arranged on the side of the conical boss (42). Water guide holes (44) are arranged in a ring at the bottom of the seedling cup (4).

2. The self-circulating strawberry seedling raising device according to claim 1, characterized in that, Air root holes (45) that penetrate are arranged in an array on the outer edge of the side of the seedling cup (4).

3. The self-circulating strawberry seedling raising device according to claim 1, characterized in that, The ultrasonic atomization module (5) includes a base support (51). An ultrasonic atomization sheet (52) is snap-connected to the top of the base support (51). A sleeve (53) is fixed to the lower end of the base support (51). A cotton swab (54) is arranged inside the sleeve (53). The terminal of the ultrasonic atomization sheet (52) is connected to a driving board (55).

4. The self-circulating strawberry seedling raising device according to claim 3, wherein A liquid inlet (531) is arranged on the side of the bottom of the sleeve (53).

5. The self-circulating strawberry seedling raising device according to claim 1, characterized in that, The horizontal induction layer (41) includes an annular inner groove (411). Coconut coir fiber or polylactic acid mesh is filled in the annular inner groove (411). An induction electrode ring (412) is embedded at the bottom of the annular inner groove (411).

6. The self-circulating strawberry seedling raising device according to claim 1, characterized in that, The liquid supply mechanism (2) includes a liquid storage tank (21). A liquid supply pump (22) is arranged inside the liquid storage tank (21). The output end of the liquid supply pump (22) is provided with a liquid supply pipeline (23). The liquid supply pipeline (23) penetrates through to the seedling-raising tray module (3).

7. The strawberry seedling raising system according to claim 1, wherein, The central axis electrode rod (6) penetrates through the ultrasonic atomization module (5) to the bottom of the conical boss (42). An insulating sleeve (61) is arranged on the outer edge of the central axis electrode rod (6).

8. The self-circulating strawberry seedling raising device according to claim 1, characterized in that, The seedling-raising tray module (3) includes a chassis (31) and a top cover (32). Multiple groups of grilles (311) are arranged at the bottom of the chassis (31). A liquid distribution groove (312) is arranged between the grilles (311).

9. The self-circulating strawberry seedling raising device according to claim 8, wherein, The chassis (31) is of a double-layer structure, and an electrical cavity (313) is arranged at the bottom.

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