Garlic seedling emergence equipment and seedling emergence method for agricultural production

Abstract

The invention relates to the technical field of garlic planting, in particular to garlic seedling emergence equipment for agricultural production and a seedling emergence method.The garlic seedling emergence equipment comprises a mulching film, a seedling guide cylinder assembly and a phase change heat preservation assembly, a circular through hole is formed in the mulching film, the seedling guide cylinder assembly comprises a plurality of vertically-arranged seedling guide cylinders, and the lower ends of the seedling guide cylinders penetrate through the circular through hole and are inserted into soil; the seedling guide cylinder comprises an inner cylinder and an outer cylinder, the outer cylinder sleeves the outer side of the inner cylinder, an annular interlayer cavity is formed between the outer cylinder and the inner cylinder, the annular interlayer cavity is filled with the phase change heat preservation assembly, an annular flange is arranged in the middle of the outer side of the outer cylinder, and the annular flange is attached to the lower surface of the mulching film and is in sealed connection with the edge of the circular through hole in a hot pressing welding mode; a covering film is arranged at the top opening inside the inner cylinder; a closed micro-domain space is defined by the seedling guide cylinder, the mulching film and the covering film together, air convection heat exchange is reduced, the phase change heat preservation unit continuously adjusts the temperature fluctuation range in the cylinder, and normal growth and development of seedlings in a low-temperature environment are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of garlic cultivation technology, specifically to garlic sprouting equipment and sprouting method for agricultural production. Background Technology

[0002] Garlic is an important economic crop widely cultivated globally. Its growth status during the seedling stage directly determines the later root development, plant resistance to adverse conditions, and final yield. Spring is the peak seedling emergence period for garlic. In cold regions of my country, sudden low-temperature disasters such as late spring frosts and radiation frosts are common. When the ambient temperature drops below -1℃ for more than 2 hours, garlic seedling cells will suffer freezing damage, leading to yellowing leaves, stunted growth, and in severe cases, direct necrosis, causing significant economic losses to growers.

[0003] Currently, the main measures to address low-temperature stress during the garlic seedling stage include full-field mulching and smoke-based frost protection. Full-field mulching, by laying polyethylene film, raises soil temperature and maintains soil moisture, providing some insulation and moisture retention in the early seedling stage. However, as the seedlings emerge, the film breaks through, and the microenvironment inside the film quickly connects with the outside environment, significantly weakening the insulation effect. At this stage, the newly emerged seedlings have tender stem base tissues and weak cold resistance, making them susceptible to frost damage if they encounter subsequent low temperatures. Smoke-based frost protection generates smoke by burning materials such as straw and sawdust, forming an insulating layer near the ground to slow heat loss. However, this method is greatly affected by wind direction and topography, resulting in uneven protection areas. Furthermore, the combustion process releases pollutants such as carbon monoxide and particulate matter, adversely affecting the atmospheric environment and failing to meet the requirements of green agriculture development, leading to restrictions on its use in some areas.

[0004] In summary, existing technologies cannot provide stable and continuous cold protection for garlic seedlings, especially the tender stem base after breaking through the soil, while ensuring the development of green agriculture. Therefore, it is necessary to develop a garlic seedling emergence device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies in which the base of garlic stems lacks green, stable, and continuous cold-resistant protection after emergence, and to propose a garlic emergence device and method for agricultural production.

[0006] A garlic sprouting device for agricultural production includes a plastic film, a seedling guide tube assembly, and a phase change insulation component. The plastic film is a polyethylene film continuously laid on the surface of the garlic field. Circular through-holes penetrating the upper and lower surfaces of the plastic film are cut according to the row and plant spacing of the garlic. The seedling guide tube assembly includes multiple vertically arranged seedling guide tubes. The lower end of each seedling guide tube passes through the circular through-holes and is inserted into the soil. The upper end of each seedling guide tube extends 3-5 cm above the surface of the plastic film. Each seedling guide tube includes an inner tube and an outer tube. The outer tube is fitted over the inner tube, and the two ends of the outer and inner tubes are connected by heat fusion. Next, an annular sandwich cavity is formed between the outer cylinder and the inner cylinder. The phase change insulation component is filled in the annular sandwich cavity. The phase change insulation component is composed of a mixture of microcapsule-encapsulated fatty acid phase change material and diatomaceous earth. The phase change temperature range of the phase change insulation component is -2℃ to +2℃. An annular flange is provided in the middle of the outer side of the outer cylinder. The annular flange is attached to the lower surface of the mulch film and is sealed to the edge of the circular through hole by hot-press welding. A film is provided at the top opening of the inner side of the inner cylinder. The film has a tearable cross-shaped pre-cut slit.

[0007] Preferably, the inner cylinder is a cylindrical body made of rigid polypropylene, and the outer cylinder is a sleeve made of flexible polyethylene.

[0008] Preferably, the fatty acid phase change material in the phase change insulation component accounts for 60% to 70% by mass, and the diatomaceous earth accounts for 30% to 40% by mass, and the mixture is filled in the annular interlayer cavity in a loose granular form.

[0009] Preferably, the fatty acid phase change material is selected from lauric acid, myristic acid, or a eutectic mixture of lauric acid and myristic acid.

[0010] Preferably, the cross-shaped pre-cut slit consists of four straight slits, each slit having a circular stress relief hole at its end, and the slit depth of the cross-shaped pre-cut slit is 40%-50% of the thickness of the coating film.

[0011] Preferably, the diameter of the circular through-hole in the mulch film is smaller than the outer diameter of the seedling guide tube, and the seedling guide tube forms an interference fit with the mulch film when inserted into the circular through-hole.

[0012] A method for garlic sprouting equipment used in agricultural production includes the following steps: S1: After garlic is sown and covered with soil, the plastic film is laid in full on the surface of the garlic field, and circular holes are punched out at the predetermined plant spacing. S2: Assemble the seedling guide tube. The phase change heat preservation component has been pre-filled in the annular interlayer cavity between the inner and outer tubes before the seedling guide tube is assembled. S3: Align the seedling guide tube with the circular through hole above the mulch film and insert it vertically into the soil, so that the annular flange of the seedling guide tube fits against the lower surface of the mulch film and is welded and sealed by a hot air welding gun. S4: After the garlic seeds germinate, the seedlings grow upward along the inner side of the seedling guide tube. When the seedling tip touches the cross-shaped pre-cut seam of the film, it pushes it open with its own growth force. The base of the seedling stem is always in the heat-preserving environment maintained by the phase change heat preservation component inside the seedling guide tube.

[0013] Preferably, in step S2, the annular gap between the bottom of the inner cylinder and the outer cylinder is melted and sealed at 140 degrees Celsius using a hot air welding gun to form a lower annular seal. After the phase change insulation component is filled, the annular gap between the top of the inner cylinder and the outer cylinder is melted and sealed at 140 degrees Celsius using a hot air welding gun to form an upper annular seal. The upper and lower annular seals are considered qualified if there is no leakage after a 0.05MPa air pressure holding test for 30 seconds.

[0014] The beneficial effects of this invention are: When the ambient temperature drops below 0℃ at night, the fatty acid-based phase change material in the phase change insulation unit transforms from a liquid to a solid state, releasing latent heat and maintaining the internal temperature of the seedling guide tube at a level not lower than -1℃. During the day, as the ambient temperature rises, the phase change material absorbs heat and remelts back into a liquid state, storing thermal energy to buffer the next cooling process. In this process, the double-layered structure of the seedling guide tube, the mulch film, and the covering film together form a closed micro-space, reducing air convection heat transfer. Simultaneously, the phase change insulation unit continuously regulates the temperature fluctuations within the tube, ensuring that the base of the garlic seedling stem is in a relatively stable thermal environment during the critical emergence period, guaranteeing the normal growth and development of the seedlings in low-temperature conditions. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] in: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural cross-sectional view of the present invention.

[0017] In the diagram: 1. Mulch film; 101. Circular through hole; 2. Seedling guide tube; 201. Annular cavity; 21. Inner cylinder; 22. Outer cylinder; 221. Annular flange; 3. Mulch film; 4. Cross-shaped pre-cut slit; 5. Phase change insulation component; 6. Soil Detailed Implementation To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0018] Example: like Figure 1 and Figure 2 As shown, a garlic sprouting device for agricultural production includes a plastic film 1, a seedling guide tube assembly, and a phase change insulation component 5. The plastic film 1 is a polyethylene film continuously laid on the surface of the garlic field. Circular through-holes 101 are formed on the plastic film 1, extending through both the upper and lower surfaces according to the row and plant spacing of the garlic. The seedling guide tube assembly includes multiple vertically arranged seedling guide tubes 2. The lower end of each seedling guide tube 2 passes through the circular through-holes 101 and is inserted into the soil. The upper end of each seedling guide tube 2 extends 3-5 cm above the surface of the plastic film 1. Each seedling guide tube 2 includes an inner tube 21 and an outer tube 22. The outer tube 22 is fitted over the inner tube 21. The two ends of the outer tube 22 and the inner tube 21 are connected by heat fusion. Next, an annular sandwich cavity 201 is formed between the outer cylinder 22 and the inner cylinder 21. The phase change insulation component 5 is filled in the annular sandwich cavity 201. The phase change insulation component 5 is composed of a mixture of microcapsule-encapsulated fatty acid phase change material and diatomaceous earth. The phase change temperature range of the phase change insulation component 5 is -2℃ to +2℃. An annular flange 221 is provided in the middle of the outer side of the outer cylinder 22. The annular flange 221 is attached to the lower surface of the ground film 1 and is sealed to the edge of the circular through hole 101 by hot-press welding. A film 3 is provided at the top opening of the inner side of the inner cylinder 21. A tearable cross-shaped pre-cut slit 4 is provided on the film 3.

[0019] This invention uses conventional polyethylene mulch film 1 as the substrate carrier. Through precise perforation and mechanical integration with a customized seedling guide tube 2, it transforms the originally macroscopic and open surface microclimate regulation into a closed, small-scale thermal buffer unit surrounding each individual seedling. This unit does not rely on electricity or fuel, but only on the solid-liquid phase change cycle driven by natural diurnal temperature variations of phase change materials to achieve continuous thermal protection for the base of the seedling stem. The entire structure is installed in one go after sowing and covering with soil, seamlessly integrating with existing agronomic processes, and possessing both engineering feasibility and agricultural applicability.

[0020] Mulch 1 is a continuous polyethylene film laid on the surface of the garlic field, serving as the physical foundation and airtightness of the entire system. It is made of general-purpose LDPE (low-density polyethylene), with a thickness controlled within the range of 0.01-0.015mm. This ensures both flexibility and mechanical strength while preventing excessive thickness that could lead to high thermal resistance and weaken the heat feedback capacity of the phase change units to the soil. Mulch 1 is not a partial cover but a continuous, full-width installation, ensuring uniformity in water vapor, heat, and fertilizer / pesticide management within the field. Circular through-holes 101 are cut into the upper and lower surfaces of Mulch 1 according to the row and plant spacing of the garlic. The positions of the circular through-holes 101 strictly correspond to the seed planting points, with an error controlled within 1cm. This ensures that after seedling germination, they can directly enter the inner cylinder 21 of the seedling guide tube 2 along the axial direction, preventing skewed growth that could lead to seedling failure or stem bending.

[0021] The inner cylinder 21 is a cylindrical body made of rigid polypropylene, and the outer cylinder 22 is a sleeve made of flexible polyethylene.

[0022] The seedling guide tube 2 includes an inner tube 21 and an outer tube 22, which together form a double-layer sleeve structure. Instead of simple stacking, they are integrated at both ends through a hot-melt process, thus forming a rigid-flexible coupling body in structure: the inner tube 21 provides axial stiffness and internal cavity shaping capability, while the outer tube 22 provides radial elasticity and interface bonding capability.

[0023] The phase change insulation component 5 contains fatty acid phase change material accounting for 60% to 70% by mass, and diatomaceous earth accounting for 30% to 40% by mass. The mixture is loosely granular and filled in the annular interlayer cavity.

[0024] The fatty acid phase change material is selected from lauric acid, myristic acid, or a eutectic mixture of lauric acid and myristic acid.

[0025] The phase change insulation component 5, filled within the annular interlayer cavity 201, serves as the energy regulation center in this embodiment. It comprises a mixture of microcapsule-encapsulated fatty acid-based phase change material and diatomaceous earth. The fatty acid-based phase change material is selected from lauric acid, myristic acid, or their binary eutectic systems. Through eutectic design, the phase change point is precisely positioned within the range of 2°C to +2°C, perfectly covering the fluctuation zone around the freezing point of garlic cells. Diatomaceous earth, as a porous inorganic carrier, not only prevents microcapsules from settling and agglomerating but also significantly improves the overall thermal conductivity of the composite material due to its high specific surface area and microporous structure, accelerating the heat transfer response speed during the phase change process.

[0026] The phase change temperature range of the phase change insulation component 5 is 2℃ to +2℃, which is the decisive indicator of the thermal regulation efficiency in this embodiment. This range is not a broad setting, but a precise match based on the physiological threshold of garlic and the actual temperature change pattern measured in the field: -2℃ is the lower limit of extreme frost, +2℃ is the starting point of daytime surface warming, and the range width of 4℃ is sufficient to cover the typical diurnal temperature difference (36℃) in early spring in the main garlic producing areas of my country.

[0027] The cross-shaped pre-cut slit 4 consists of four straight slits, and each slit has a circular stress relief hole at its end. The slit depth of the cross-shaped pre-cut slit 4 is 40%-50% of the thickness of the coating 3.

[0028] The mulch film 3 is made of polyethylene, the same material as the mulch film 1, ensuring effective protection against cold air sinking before the seedlings break through. The cross-shaped pre-cut slits 4 are composed of four orthogonal straight slits, each with a circular stress relief hole at the end to prevent stress concentration at the slit tips from causing unintended tearing. The slit depth is strictly controlled at 40%-50% of the mulch film 3 thickness, ensuring both initial integrity and sufficient force for the seedlings to initiate the tearing process. Furthermore, the stress relief holes can be replaced with elliptical or rhomboid shapes, as long as they effectively disperse the stress at the tear tip.

[0029] The diameter of the circular through-hole 101 of the mulch film 1 is smaller than the outer diameter of the seedling guide tube 2. When the seedling guide tube 2 is inserted into the circular through-hole 101, it forms an interference fit with the mulch film 1. The initial interference fit between the seedling guide tube 2 and the mulch film 1 provides pre-tightening force support for the subsequent hot-press sealing of the annular flange 221 with the mulch film 1.

[0030] The specific implementation steps of the garlic seedling emergence method of the present invention are as follows: S1: After garlic sowing and covering with soil, the entire mulch film 1 is laid on the surface of the garlic field, and circular through holes 101 are punched out at the predetermined plant spacing; S2: The seedling guide tube 2 is assembled. The phase change heat preservation component 5 is pre-filled in the annular interlayer cavity 201 between the inner tube 21 and the outer tube 22 before the seedling guide tube 2 is assembled; S3: The seedling guide tube 2 is vertically inserted into the soil from above the mulch film 1, aligned with the circular through holes 101, so that the annular flange 221 of the seedling guide tube 2 is attached to the lower surface of the covering film 3 and welded and sealed by a hot air welding gun; S4: After the garlic seeds germinate, the seedlings grow upward along the inner side of the inner tube 21 of the seedling guide tube 2. When the seedling tip contacts the cross-shaped pre-cut slit 4 of the covering film 3, it pushes it open by its own growth force. The base of the seedling stem is always in the heat preservation environment maintained by the phase change heat preservation component 5 inside the seedling guide tube 2.

[0031] The seedling guide tube 2 is cylindrical in shape. Its lower end passes through the circular through hole 101 and is inserted into the soil to a depth of 3-5cm. This depth is sufficient to anchor the tube and prevent it from being blown away by the wind, while avoiding the seed's main root area and preventing physical interference. Its upper end is 3-5cm above the surface of the mulch film 1. This height design serves a dual function: on the one hand, it provides enough space for the mulch film 3 to withstand the stress of the seedling breaking through, and on the other hand, it ensures that the upper edge of the tube is higher than the surface of the mulch film 1, forming a physical barrier to prevent surface condensate from seeping down the tube wall or wind and sand from entering.

[0032] In step S2, the annular gap at the bottom of the inner cylinder 21 and the outer cylinder 22 is melted and sealed at 140 degrees Celsius using a hot air welding gun to form a lower annular seal. After the phase change insulation component 5 is filled, the annular gap at the top of the inner cylinder 21 and the outer cylinder 22 is melted and sealed at 140 degrees Celsius using a hot air welding gun to form an upper annular seal. The upper and lower annular seals are considered qualified if there is no leakage after a 0.05MPa air pressure holding test for 30 seconds.

[0033] An annular flange 221 is provided on the middle of the outer side of the outer cylinder 22. The annular flange 221 is attached to the lower surface of the mulch film 1 and is sealed to the edge of the circular through hole 101 by hot-press welding. This structure is a key mechanical interface to ensure the airtightness of the micro-area. The annular flange 221 is integrally extruded or hot-pressed and extended from the outer cylinder 22. The hot-press welding adopts a pulse hot-press welding machine with a heating head temperature of 130-145℃, a pressure of 0.3-0.5MPa, and an action time of 1.5-2.5s. This causes the polyethylene molecules to undergo controlled melting and recrystallization at the edge of the through hole, forming a welded band. If there is no leakage after holding the pressure at 0.05MPa for 30 seconds, it is considered qualified. This sealing method completely isolates the air exchange between the upper and lower sides of the mulch film 1.

[0034] Working principle: This application provides a garlic seedling emergence device and method for agricultural production. The method uses a film 3 to provide basic coverage for the garlic field, forming a continuously laid polyethylene film layer. Circular through-holes 101, arranged according to the row and plant spacing of the garlic, penetrate the upper and lower surfaces, providing precise positioning for the installation of the seedling guide tubes 2. The seedling guide tube assembly includes multiple vertically arranged seedling guide tubes 2, each with its lower end passing through a circular opening in the film 3 structure and inserted into the soil, thus physically guiding the seedling growth path. The seedling guide tube 2 is based on a double-layered sleeve structure consisting of an inner tube 21 and an outer tube 22, forming an annular cavity 201 between them. This design not only provides structural support but also creates space for accommodating phase change materials. A phase change insulation unit, composed of a microcapsule-encapsulated fatty acid-based phase change material and a diatomaceous earth mixture, is filled into this annular cavity 201. The phase change temperature range is -2℃ to +2℃, achieving passive regulation of temperature fluctuations. The annular flange 221 of the seedling guide tube 2 is attached to the lower surface of the covering film 3 structure and sealed to the circular opening edge of the covering film 3 structure by hot-press welding, ensuring the airtightness of the microenvironment and preventing cold air intrusion. Furthermore, a tearable cross-shaped pre-cut slit 4 is provided at the upper opening of the seedling guide tube 2, allowing the seedlings to push open the opening with their own growth force, ensuring timely opening of the seedling channel while maintaining the sealed state before seedling emergence. This design improves the thermal environment stability of garlic seedlings, especially at the base of the seedling stem after breaking through the soil. Through the phase change process of the phase change material in the temperature range of -2℃ to +2℃, when the ambient temperature drops below 0℃ at night, the fatty acid phase change material in the phase change insulation unit changes from liquid to solid, releasing latent heat and maintaining the internal temperature of the seedling guide tube 2 at a level not lower than -1℃. After the ambient temperature rises during the day, the phase change material absorbs heat and remelts into a liquid state, storing thermal energy and providing a buffer for the next cooling process, significantly reducing the temperature fluctuation range inside the seedling guide tube 2. Therefore, this application fundamentally solves the problem of the difficulty in maintaining a stable thermal environment at the base of garlic seedlings after they break through the soil during the seedling stage, achieving precise protection of key parts of seedling growth and ensuring the normal growth and development of seedlings in low-temperature environments.

[0035] Therefore, this embodiment fundamentally solves the technical problem described in the background art of the lack of green, stable, and continuous cold-resistant protection at the base of the stem after emergence. It achieves the technical effect of significantly reducing the seedling frost damage rate caused by late spring cold and improving the uniformity of emergence and later yield without increasing artificial intervention or introducing pollution sources.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The descriptions in the above embodiments and specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A garlic sprouting device for agricultural production, characterized in that, The system includes a plastic film (1), a seedling guide tube assembly, and a phase change insulation assembly (5). The plastic film (1) is a polyethylene film continuously laid on the surface of the garlic field. The plastic film (1) has circular through holes (101) that penetrate the upper and lower surfaces according to the row spacing and plant spacing of garlic. The seedling guide tube assembly includes multiple vertically arranged seedling guide tubes (2). The lower end of the seedling guide tube (2) passes through the circular through holes (101) and is inserted into the soil. The upper end of the seedling guide tube (2) is 3-5 cm above the surface of the plastic film (1). The seedling guide tube (2) includes an inner tube (21) and an outer tube (22). The outer tube (22) is fitted outside the inner tube (21). The two ends of the outer tube (22) and the inner tube (21) are connected by heat fusion. An annular interlayer cavity (201) is formed between the inner cylinder (22) and the inner cylinder (21). The phase change insulation component (5) is filled in the annular interlayer cavity (201). The phase change insulation component (5) is composed of a mixture of fatty acid phase change material encapsulated in microcapsules and diatomaceous earth. The phase change temperature range of the phase change insulation component (5) is -2℃ to +2℃. An annular flange (221) is provided in the middle of the outer side of the outer cylinder (22). The annular flange (221) is attached to the lower surface of the ground film (1) and is sealed to the edge of the circular through hole (101) by hot-press welding. A film (3) is provided at the top opening of the inner side of the inner cylinder (21). A tearable cross-shaped pre-cut slit (4) is provided on the film (3).

2. The garlic sprouting equipment for agricultural production according to claim 1, characterized in that, The inner cylinder (21) is a cylindrical body made of rigid polypropylene, and the outer cylinder (22) is a sleeve made of flexible polyethylene.

3. The garlic sprouting equipment for agricultural production according to claim 1, characterized in that, The phase change insulation component (5) contains fatty acid phase change material with a mass ratio of 60% to 70% and diatomaceous earth with a mass ratio of 30% to 40%, and the mixture is filled in the annular sandwich cavity (201) in a loose granular form.

4. The garlic sprouting equipment for agricultural production according to claim 1, characterized in that, The fatty acid phase change material is selected from lauric acid, myristic acid, or a eutectic mixture of lauric acid and myristic acid.

5. The garlic sprouting equipment for agricultural production according to claim 1, characterized in that, The cross-shaped pre-cut slit (4) consists of four straight slits, and each slit has a circular stress relief hole at the end. The slit depth of the cross-shaped pre-cut slit (4) is 40%-50% of the film thickness of the coating (3).

6. The garlic sprouting equipment for agricultural production according to claim 1, characterized in that, The diameter of the circular through hole (101) of the mulch film (1) is smaller than the outer diameter of the seedling guide tube (2). When the seedling guide tube (2) is inserted into the circular through hole (101), it forms an interference fit with the mulch film (1).

7. A method for garlic sprouting equipment used in agricultural production according to any one of claims 1-6, characterized in that, Includes the following steps: S1: After garlic is sown and covered with soil, the plastic film (1) is laid on the surface of the garlic field and circular through holes (101) are punched out at the predetermined plant spacing. S2: Assemble the seedling guide tube (2). The phase change heat preservation component (5) has been pre-filled in the annular interlayer cavity (201) between the inner cylinder (21) and the outer cylinder (22) before the seedling guide tube (2) is assembled. S3: Insert the seed guide tube (2) vertically into the soil from above the mulch film (1) into the circular through hole (101), so that the annular flange (221) of the seed guide tube (2) is attached to the lower surface of the mulch film (3) and then welded and sealed by hot air welding gun. S4: After the garlic seeds germinate, the seedlings grow upward along the inner side of the inner tube (21) of the seedling guide tube (2). When the seedling tip touches the cross-shaped pre-cut seam (4) of the covering film (3), it pushes it open with its own growth force. The base of the seedling stem is always in the heat-preserving environment maintained by the phase change heat preservation component (5) inside the seedling guide tube (2).

8. The garlic sprouting method for agricultural production according to claim 7, characterized in that, In step S2, the annular gap between the bottom of the inner cylinder (21) and the outer cylinder (22) is melted and sealed at 140 degrees Celsius using a hot air welding gun to form a lower annular seal. After the phase change insulation component (5) is filled, the annular gap between the top of the inner cylinder (21) and the outer cylinder (22) is melted and sealed at 140 degrees Celsius using a hot air welding gun to form an upper annular seal. The upper and lower annular seals are considered qualified if there is no leakage after a 0.05MPa air pressure holding test for 30 seconds.

Images