A device and method for cutting and promoting seed germination of suaeda salsa

Abstract

The application discloses a kind of Suaeda salsa cutting seed promoting integrated device and method, belong to the technical field of coastal wetland ecological restoration.The device includes inclined plane layer, flow guide channel layer, germination auxiliary layer and fixed system;The inclined plane layer is double-inclined plane cover, and the inclined plane is provided with diamond-shaped opening, and both sides are provided with half-closed side plate;Flow guide channel layer is arranged below inclined plane layer, and the inclined plane is provided with inclined hole pipe, and side hole is opened on the wall of hole pipe, and the center of flow guide channel layer is integrally formed with central axis, and can reciprocate swing in the range of 0°-30° around central axis, wherein lower area is provided with wave convex;Germination auxiliary layer is located below flow guide channel layer, and is sequentially provided with jute rope net layer, jute fiber maintenance powder layer and improved layer from top to bottom;Fixed system includes support, auxiliary layer bamboo stick and cutting seed fixed bamboo stick.The application also discloses the implementation method based on the device.The application realizes efficient cutting, water and sand separation and long-acting salt reduction and germination by structure cooperation, effectively improves the utilization rate of Suaeda salsa natural seed source and the natural germination survival rate, and is suitable for the ecological restoration of salt marsh wetland in high-tidal flat, middle-tidal flat and low-tidal flat.

Description

Technical Field

[0001] This invention relates to the field of coastal wetland ecological restoration technology, and in particular to an integrated device and method for cutting off seeds and promoting germination of Suaeda salsa in saline-alkali land. Background Technology

[0002] Suaeda salsa in coastal intertidal zones is a typical pioneer plant of salt marshes, and its natural recovery and population expansion mainly depend on seed capture, stable implantation, successful germination, and establishment. Currently, domestic and international technologies related to the ecological restoration of Suaeda salsa primarily focus on the following categories: One approach is micro-topography modification technology. This technology increases surface roughness by excavating tidal ditches, constructing furrows, and creating micro-zones with varying elevations. This reduces the erosion of seeds by wind and water, alters hydrological conditions, and creates favorable conditions for seed retention and germination. Common micro-topography modification methods include pit-type and plow-type. The pit-type involves digging pits in bare or flat ground to create concave micro-topographic structures, utilizing the elevation differences to accumulate water and create moist areas. The plow-type uses plowing machinery to create strip-like protrusions and depressions on the surface, intercepting seeds by altering surface roughness. However, this technology has drawbacks in practical applications, including large engineering workload, significant foundation disturbance, typically requiring implementation in the first year (repeated construction will damage vegetation already germinated the previous year, making it difficult to maintain the topography modification effect), and poor stability in areas with strong erosion at low tide. Micro-topography modification requires a large investment in machinery, resulting in high economic costs. In addition, successful micro-topography modification relies heavily on precise design (such as slope, width, and spacing). If the design is not done properly, the water flow may be too fast and wash away the seeds, or the water may be too deep and cause the roots of the vegetation to lack oxygen.

[0003] Secondly, there is the artificial sowing and transplanting technique. This technique mainly uses manual broadcasting, aerial sowing, and seedling transplanting, and is currently the most common method of restoration. However, it has problems such as high seed loss rate, uneven emergence, low survival rate on low tide beaches, high cost of exogenous seed sources, and difficulty in large-scale natural dissemination.

[0004] Thirdly, seed water retention and germination assistance technology. This technology uses mulch materials such as straw, non-woven fabric, plant fibers, and water-retaining agents to improve the water retention capacity of the beach surface and alleviate salt and drought stress. However, most water-retaining materials do not have salt reduction function and are prone to displacement, rotting, or obstructing seed implantation under the action of tides.

[0005] In addition, there are a few seed interception and planting assistance technologies, which mainly utilize structures such as nets, fences, grass mats, and planting pads to intercept Suaeda salsa seeds spread by tides and wind, thereby improving the utilization rate of natural seed sources. However, these technologies usually only focus on the single function of seed interception and do not consider auxiliary effects such as water retention and salt reduction, making it difficult to achieve the synergistic effect of multiple functions such as seed interception, germination promotion, and erosion resistance.

[0006] In summary, existing technologies for the remediation of Suaeda salsa in saline-alkali land suffer from functional fragmentation, low seed interception efficiency, insufficient water-sand separation, poor germination environment, high construction costs, and insufficient ecological compatibility. Therefore, there is an urgent need for an integrated device and method that can achieve efficient seed interception, effective water-sand separation, long-term improvement of the germination environment, and is also eco-friendly. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides an integrated device and method for intercepting and promoting the germination of Suaeda salsa seeds in saline-alkali land. This aims to improve the interception efficiency of natural Suaeda salsa seeds in the intertidal zone, achieve efficient water-sand separation, improve the seed germination microenvironment, integrate the functions of interception and germination promotion, reduce the cost of artificial intervention, and enhance the ecological restoration effect.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: A device integrating seed cutting and germination promotion for Suaeda salsa in saline-alkali soil includes: The inclined layer is a double-inclined triangular shell structure with diamond-shaped openings in its inclined area and semi-enclosed vertical side plate structures on both sides that are closed at the bottom and open at the top. The flow channel layer is located below the inclined layer and has a double-inclined triangular structure. Several inclined perforated tubes are provided on its inclined surface, and several side holes are provided on the wall of the perforated tubes. The center of the flow channel layer is integrally formed with a central axis, and the lower part of its inclined surface has wavy protrusions. The germination support layer is located below the flow channel layer, and from top to bottom, it consists of the jute rope net layer, the jute fiber pollen-holding layer, and the improvement layer. The fixing system includes a support for fixing the central axis of the flow channel layer, an auxiliary layer bamboo stick for fixing the germination auxiliary layer, and a seed-cutting fixing bamboo stick for fixing the inclined layer. The inclined layer covers the flow channel layer, with its bottom surface contacting the mudflat, enclosing the flow channel layer and the germination aid layer inside; the flow channel layer can oscillate back and forth within a range of 0° to 30° around its central axis; the side plate of the inclined layer and the extended bottom surface of the flow channel layer form an enclosing structure, completely wrapping the germination aid layer inside; the device and the germination aid layer are fixed separately and do not interfere with each other.

[0009] In the above scheme, the inclination angle between the two sides of the inclined surface of the inclined layer and the horizontal plane is 60°, the inclination angle between the two sides of the flow channel layer and the horizontal plane is 60°, and the inclination angle between the perforated tube and the horizontal plane is 60°; the diamond-shaped opening size of the inclined surface layer is 5-8mm in length and 3-5mm in width, and the arrangement density is 200-300 per square meter; the side plate has 5 vertical strip-shaped sand discharge ports in the middle, each with a length of 4cm and a width of 2cm, arranged in a V-shape.

[0010] In the above scheme, the inclined surface length of the flow channel layer is 14-19cm; the length of the perforated tube is 8-12cm, the diameter of the perforation is 3-4mm, and the arrangement density is 200-250 tubes / square meter; the diameter of the side holes of the perforated tube is 1-1.5mm, and each perforated tube has 12-20 side holes, which are evenly distributed along the length of the perforated tube and arranged in multiple directions around the circumference.

[0011] In the above scheme, the wave protrusions are arranged in the lower part of the inclined surface of the flow channel layer, in 2 to 3 rows, with a protrusion height of 8 to 12 mm, a width of 15 to 25 mm, and a spacing of 15 to 25 mm between adjacent protrusions in the same row.

[0012] In the above scheme, the central axis extends out to both sides of the flow channel layer, with an extension length of 2-3 cm; the support members are symmetrically arranged on both sides of the flow channel layer, and a rotating hole is opened at the upper end of the support member, with both ends of the central axis extending into the rotating hole to form a clearance fit; a gap of 2-5 mm is left between the two sides of the flow channel layer and the inner side of the support member; the support member is vertically inserted into the mudflat more than 40 cm, and each support member is also equipped with an auxiliary fixing member, which is driven into the mudflat at an angle of 30°-45° from the upper part of the support member, with an insertion depth of 30-40 cm, forming a double triangular support structure.

[0013] In the above scheme, the auxiliary layer bamboo sticks are vertically inserted into the mudflat at intervals of 20-30cm, with an insertion depth of 30-40cm, and the upper end is flush with the jute rope net layer; the seed cutting and fixing bamboo sticks penetrate the sloping edge of the flow channel layer, are inserted into the mudflat 30-40cm, and are staggered from the support, auxiliary fixing parts, and auxiliary layer bamboo sticks.

[0014] In the above scheme, the overall thickness of the germination auxiliary layer is 3cm; the germination auxiliary layer consists of a jute rope net layer, a jute fiber powder-holding layer and a modification layer from top to bottom, with an overall thickness of 3cm; the jute rope net layer and the jute fiber powder-holding layer are sewn together with jute thread at 20cm intervals; the modification layer is made of zeolite powder and bentonite fine powder mixed in a 3:1 mass ratio and filled under the jute fiber powder-holding layer.

[0015] In the above scheme, the total vertical height of the device is 14-18cm; the slope length of the inclined layer is 16-21cm; the vertical gap between the inclined layer and the flow channel layer is 20-30mm; and the gap between the flow channel layer and the jute rope net layer is 3-5cm.

[0016] In the above scheme, the germination auxiliary layer is set with differentiated thickness and material usage according to the hydrodynamic conditions of high tide, mid tide, and low tide, wherein: High Tide Beach: Jute rope mesh layer with a mesh size of 1.0–2.0 cm, jute fiber holding layer thickness of 0.3–0.5 cm, and improvement layer thickness of 0.5–1.0 cm; Mid-tidal flats: jute rope netting mesh size 0.8–1.0 cm, jute fiber holding layer thickness 0.4–0.6 cm, amendment layer thickness 1.0–1.5 cm; Low tide beach: jute rope net layer mesh size 1.0-1.5cm, jute fiber holding layer thickness 0.5-0.7cm, improvement layer thickness 1.5-2.0cm.

[0017] A method for integrating seed cutting and germination promotion of Suaeda salsa in saline-alkali soil based on the aforementioned device includes the following steps: (1) Clean up debris on the surface of the tidal flat, and lay out the lines in a staggered triangular pattern to determine the installation points of the device; (2) The improved layer, jute fiber powder-holding layer and jute rope net layer are laid on the beach from bottom to top, and the auxiliary layer bamboo sticks are vertically inserted into the beach to fix them. (3) Insert the support vertically into the mudflat and insert the auxiliary fixing part obliquely to form a double triangular support structure; embed the central shaft of the flow channel layer into the rotating hole of the support to realize the swing assembly; use the cut bamboo stick to limit and fix the edge of the flow channel layer; (4) The inclined layer is placed on top of the flow channel layer, with the bottom edge attached to the mudflat to form a pre-filter and enclosed protection structure. (5) The wind or tide drives the seeds to migrate and flow through the device. The inclined layer intercepts coarse sand impurities, and the seeds enter the interior of the guide channel layer. Water and sand are separated by the side holes of the pore tube, and the seeds fall oriented along the pore tube to the germination auxiliary layer. (6) Seeds penetrate the jute rope net layer and the jute fiber pollen-holding layer and fall onto the surface of the improved layer; the improved layer continuously retains water, reduces salt, and inhibits salt return, thus creating a low-salt and stable germination microenvironment; (7) The wind or water flow impacts the wave protrusion structure, driving the flow channel layer to swing back and forth, realizing the functions of water flow energy dissipation, channel self-cleaning and anti-jamming; (8) After the seedlings of Suaeda salsa are planted, remove the bamboo sticks and supports for cutting the seeds and dismantle the cutting device; the germination auxiliary layer can be selectively retained or dismantled, the dismantled components can be recycled and reused, and the retained structure can be naturally degraded.

[0018] The above technical solution provides an integrated device and method for cutting and promoting germination of Suaeda salsa seeds in saline-alkali soil, which has the following beneficial effects: (1) Improve the utilization rate of natural seed sources and reduce the cost of artificial intervention. Through the triangular seed cutting layout and the exclusive sloping layer and diversion channel layer structure, the natural salt-land Suaeda salsa seeds spread by tides and wind are efficiently captured, reducing the investment in external seed sources and construction costs, which is in line with the concept of in-situ natural restoration.

[0019] (2) Achieve long-term retention of improved materials and ensure stable salt reduction and germination promotion effects. Through the double-layer powder-fixing structure of "jute rope net layer + jute fiber powder-holding layer", combined with the enclosed protective structure of the bottom surface of the flow channel layer and the bottom of the inclined layer side plate being fully enclosed, the improved powder is effectively prevented from being washed away by tides or lateral flow, so that the improved layer can play a long-term role in salt reduction and water retention, providing a stable low-salt microenvironment for seed germination.

[0020] (3) Achieve multi-functional synergy and integration, solving some of the problems of fragmented functions in existing technologies. It integrates multiple functions such as seed interception, water-sand separation, seed diversion, water retention and salt reduction, and standby germination, without the need for additional independent devices. The structure is simple and the functions work together to effectively improve the repair efficiency.

[0021] (4) Adapt to the natural growth rhythm to effectively improve the uniformity of seed germination and survival rate. Abandon the design concept of immediate germination of existing technology, construct a standby repair mode of "continuous seed cutting - seed retention - germination at suitable temperature", adapt to the biological characteristics of Suaeda salsa in saline land, avoid high seed mortality caused by unsuitable environment, and improve natural germination rate and seedling survival rate.

[0022] (5) It is versatile, easy to construct and durable. The triangular layout combined with the tidal level difference parameter design can adapt to different hydrodynamic conditions of high tide, mid tide and low tide. The device is permeable to water and moisture, has strong erosion resistance, can operate stably for a long time, is suitable for large-area tidal flat restoration, and the modular structure facilitates on-site construction and later maintenance.

[0023] (6) Excellent ecological compatibility and no secondary environmental interference. No chemical agents are required throughout the process. The fixing components and germination auxiliary layer are made of biodegradable or environmentally friendly anti-corrosion materials, and there are no environmental residues after the device is dismantled. By helping natural seeds settle and improve in situ, the natural restoration and expansion of Suaeda salsa populations are gradually realized, which helps to restore and stabilize the coastal salt marsh wetland ecosystem. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0025] Figure 1 This is a schematic diagram of the overall structure of an integrated device for cutting and promoting the germination of Suaeda salsa in intertidal saline land according to the present invention (with inclined side plates).

[0026] Figure 2 This is a schematic diagram of the overall structure of an integrated device for cutting and promoting the germination of Suaeda salsa in intertidal saline land according to the present invention (the inclined side plate is omitted).

[0027] Figure 3This is a cross-sectional structural schematic diagram of an integrated device for cutting and promoting the germination of Suaeda salsa in intertidal saline land according to the present invention.

[0028] Figure 4 This is a schematic diagram of the overall structure and layered division of the germination auxiliary layer in this invention, wherein (a) is the overall structure and (b) is the divided structure.

[0029] In the diagram, 1. Sloping layer; 11. Rhomboid opening; 12. Side plate; 121. Sand discharge port; 2. Flow channel layer; 21. Central axis; 22. Wave-shaped protrusion; 23. Pore tube; 231. Side hole; 3. Germination auxiliary layer; 31. Jute rope net layer; 32. Jute fiber pollen-holding layer; 33. Improvement layer; 4. Support component; 41. Auxiliary fixing component; 5. Auxiliary layer bamboo stick; 6. Seed cutting and fixing bamboo stick; 61. Barbs; 7. Mudflat. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Example 1 I. Overall System Structure This embodiment provides an integrated device and method for cutting off seeds and promoting germination of Suaeda salsa in intertidal saline land. It is suitable for in-situ ecological restoration of Suaeda salsa in high tide, mid tide, and low tide areas under conditions of no irrigation and natural seed fall. The system consists of several seed cutting-and-germination-promoting units, which are arranged in a staggered triangular pattern on the beach surface to achieve full tidal coverage.

[0032] like Figure 1 and Figure 2 As shown, a single seed cutting and germination promotion unit has an overall inclined modular structure, which includes, from top to bottom: a seed cutting device (composed of an inclined layer 1 and a middle penetrating flow channel layer 2, which are separate structures), a germination auxiliary layer 3 (a lower composite structure independent of the seed cutting device), and fixing and rotating components (central shaft 21, support 4, auxiliary layer bamboo stick 5, and seed cutting fixing bamboo stick 6).

[0033] The total vertical height of the device is 14-18cm. It is adapted to the tidal range of coastal tidal flats, and its overall modular structure can adapt to the undulating terrain of the tidal flats, ensuring stable placement of the device.

[0034] The seed-cutting device is fixed to the mudflat 7 via a central shaft 21, a support member 4, and seed-cutting fixing bamboo sticks 6. The germination auxiliary layer 3 is independently fixed to the mudflat 7 via auxiliary layer bamboo sticks 5. The two are fixed separately and do not interfere with each other. A gap of 3-5 cm is maintained between the lower end face of the flow channel layer 2 of the seed-cutting device and the jute rope net layer 31 of the germination auxiliary layer 3, with a maximum gap not exceeding 5-10 cm. The inclined layer 1 acts as a pre-filter cover, freely covering the flow channel layer 2.

[0035] The central axis 21 is the central pivot of the flow channel layer 2. The flow channel layer 2 can rotate slowly around the central axis 21 within the range of 0 to 30° to achieve energy dissipation and self-cleaning functions. The seed cutting device can be disassembled as a whole in the later stage without damaging the fixation of the germination auxiliary layer 3. The germination auxiliary layer 3 can be disassembled or left in the mudflat 7 for natural degradation.

[0036] II. Detailed Structure of the Seed Cutting Device like Figure 3 As shown, the seed-cutting device is a vertical triangular structure with symmetrical inclined planes along the tidal flow direction. The angle between the two inclined planes and the horizontal plane is 60°. In this embodiment, the overall height of the seed-cutting device is 16-17 cm.

[0037] (a) Sloping layer 1 The inclined layer 1 is the outer pre-filter cover of the seed cutting device, made of high-density polyethylene (HDPE) plastic (PP plastic can also be used), with a thickness of 2-3 mm. It is a symmetrical double-inclined triangular shell with an inclined length of 16-21 cm, arranged parallel to the flow channel layer 2, completely covering the inclined area of ​​the flow channel layer 2. Its core function is to guide water and seeds into the flow channel layer 2, while simultaneously blocking coarse sand and debris from entering the device, preventing coarse sand from entering the perforated tube 23 and causing blockage. This provides pre-protection for the water-sand separation function of the flow channel layer 2, ensuring that the side holes 231 of the perforated tube 23 can properly achieve water-sand separation, thereby ensuring that the seeds fall smoothly to the germination auxiliary layer 3. It also provides space for the swinging of the flow channel layer 2 without interfering with its rotational movement.

[0038] The slope angle is 60°, consistent with the slope angle of the guide channel layer 2, ensuring that the coarse sand rolls smoothly down the slope and does not accumulate on the surface. Diamond-shaped openings 11 are created in the slope area of ​​the slope layer 1, with dimensions of 5–8 mm in length and 3–5 mm in width, and a density of 200–300 openings / m². 2 All edges are rounded to avoid cutting the jute rope net, catching debris, or scratching the seeds. The sloping layer 1 covers the flow channel layer 2, completely covering the sloping area of ​​the flow channel layer 2, with a gap of about 20-30mm between it and the flow channel layer 2. The bottom directly contacts the tidal flat surface, covering both the flow channel layer 2 and the germination auxiliary layer 3 inside.

[0039] The inclined layer 1 consists of semi-enclosed vertical side panels on both sides, closed at the bottom and open at the top, integrally formed with the inclined layer 1. The lower end of the side panels is closed to a height of 8-10cm, with a smooth vertical surface on the outer side. The closed ends of the side panels and the extended bottom surface of the flow channel layer 2 form a protective structure of "full bottom coverage + fully enclosed lower side panels," completely enclosing the germination auxiliary layer 3 within the bottom surface of the flow channel layer 2 and the inner side of the closed area of ​​the side panels. The upper part of the side panels is open, and the junction between the closed and open areas is rounded with a 2-3mm chamfer to avoid sand accumulation and reduce water flow resistance.

[0040] A strip-shaped sand discharge port 121 is reserved in the middle of the side plate enclosed area. Five vertical strip-shaped sand discharge ports 121 are opened on each side plate, each 4cm long and 2cm wide, arranged in a V-shape, and evenly distributed laterally at 0.8cm intervals. The bottom end of the middle sand discharge port is flush with the bottom surface of the flow channel layer 2, and the bottom ends of the sand discharge ports on both sides are gradually raised to the sides, raised by 1cm and 2cm respectively. The outer surface of the side plate enclosed area remains smooth, and a small gap of 2-5mm is maintained between it and the germination auxiliary layer 3 and the inner side of the rotatable flow channel layer 2.

[0041] The outer surface of the closed area of ​​the side plate remains smooth, with a small gap of 2 to 5 mm between it and the inner side of the germination auxiliary layer 3 and the rotatable flow channel layer 2. This does not affect the 0 to 30° rotation of the flow channel layer 2 around the central axis 21, and there are no protruding structures.

[0042] The sealed side plate provides comprehensive lateral protection for the germination auxiliary layer 3, while also providing ample rotation space for the central axis 21 through the open upper end. At the same time, it retains the water and sand separation and discharge function of the strip-shaped sand discharge port 121. Water and fine sand seeping from the side hole 231 of the perforated pipe 23 enter the interior of the guide channel layer 2 and are discharged to the mudflat 7 through the strip-shaped sand discharge port 121 of the side plate, without accumulating in the device or scouring the germination auxiliary layer 3.

[0043] (ii) Flow channel layer 2 The flow channel layer 2 is the core component of the seed cutting device, integrally molded from HDPE plastic (PP plastic can also be used). It has a double-sloped (60° inclination) triangular structure, with a fully enclosed flat plate extending outwards at the bottom. The slope length is 14–19 cm, slightly shorter than the slope layer 1. Its core functions are seed flow guidance, water-sand separation, lateral protection, and germination auxiliary layer 3. It can also rotate around the central axis 21 to achieve energy dissipation and self-cleaning.

[0044] Structure of the perforated tube 23: 60° inclined perforated tubes 23 are drilled on both slopes of the flow channel layer 2. The perforated tube 23 has a through-hole structure, with the upper opening located on the surface of the slope and the lower opening penetrating the bottom surface. The diameter of the perforated tube 23 is 3–4 mm, larger than the diameter of the Suaeda salsa seeds (1–2 mm), ensuring smooth seed rolling and preventing blockage of the perforated tube 23; the length is 8–12 cm, matching the thickness of the flow channel layer 2, ensuring that after falling from the slope surface into the perforated tube 23, the seeds can smoothly fall from the lower opening on the bottom surface; the density is 200–250 seeds / m². 2 The seeds are evenly distributed on the two inclined surfaces of the flow channel layer 2, ensuring that no matter where the seeds fall on the inclined surface, they can quickly slide into the nearby pore tubes 23. The pore tubes 23 are evenly distributed on the two inclined surfaces. The arrangement of the pore tubes 23 is staggered from the diamond-shaped openings 11 of the inclined surface layer 1, which prevents coarse sand from entering the pore tubes 23 directly without being filtered, and at the same time ensures that after the seeds pass through the diamond-shaped openings 11, they can fall on the inclined surface of the flow channel layer 2 and slide into the pore tubes 23.

[0045] Side holes 231 of the perforated tube 23: Side holes 231 are evenly distributed in a ring on the wall of each perforated tube 23. The diameter of the side holes 231 is 1-1.5 mm. There are 12-20 side holes 231 in each perforated tube 23. The side holes 231 are evenly distributed along the inclined direction of the perforated tube 23 and arranged in multiple directions around the circumference. This structure realizes the dual functions of water and sand separation and seed interception. Water and fine sand are quickly discharged through the side holes 231. Because the seeds of Suaeda salsa are larger than the side holes 231, they fall along the inclined direction of the perforated tube 23 to the germination auxiliary layer 3.

[0046] Sand discharge path: Water and fine sand seeping from the side hole 231 of the hole wall enter the closed space inside the guide channel layer 2, and are discharged to the mudflat 7 through the strip-shaped sand discharge port 121 in the middle of the closed area of ​​the side plate. They do not accumulate in the device or enter the germination auxiliary layer 3.

[0047] Bottom surface of the flow channel layer 2: The bottom surface of the flow channel layer 2 is a fully enclosed thickened flat plate structure, integrally molded with the same HDPE / PP plastic as the main body of the flow channel layer 2. The plate thickness is 3-4mm (slightly thicker than the main body to improve structural rigidity). Its core function is to seal the lower space of the device and support the structure of the perforated tube 23. At the same time, it extends horizontally outward to the edge of the germination auxiliary layer 3 directly above it. The extension width is completely matched with the lateral dimension of the germination auxiliary layer 3, so that the bottom surface can completely cover the upper area of ​​the germination auxiliary layer 3. The lower surface of the bottom surface is kept flat and maintains a gap of 3-5cm with the jute rope net layer 31 of the germination auxiliary layer 3 to avoid interfering with the vertical falling of the seeds. The extended bottom surface and the closed inclined side plate of the layer 1 form an enclosing structure, completely wrapping the germination auxiliary layer 3 in the bottom surface and the inner side of the side plate of the flow channel layer 2, preventing the tidal water flow from the bottom side from impacting the germination auxiliary layer 3.

[0048] The connection between the bottom surface and the lower opening of the pore tube 23 is rounded to prevent seeds from getting stuck. There are no openings in the extended area of ​​the bottom surface to ensure the sealing of the lateral protection. Only the corresponding position of the lower opening of the pore tube 23 is reserved for the seed to fall into the germination auxiliary layer 3.

[0049] The central axis 21, support members 4, and connecting structure are as follows: A central axis 21 is integrally formed at the center of the flow channel layer 2. The axis of the central axis 21 is horizontally set and perpendicular to the direction of the main tidal current. The two ends of the central axis 21 extend out to both sides of the flow channel layer 2, with an extension length of 2-3 cm. Support members 4 are symmetrically distributed on both sides of the flow channel layer 2. The main material is hardwood treated with environmental protection and corrosion resistance (HDPE / PP plastic can also be used). Each support member 4 has a rotating hole at the top that mates with the central axis 21, with a depth of 2-3 cm. The two ends of the central axis 21 extend into the corresponding rotating holes of the support member 4 to form a rotating fit. The lower end of the support member 4 is vertically inserted into the mudflat 7 at least 40 cm for main fixation. At the same time, an auxiliary fixing member 41 is driven into the mudflat 7 from the upper part of the support member 4 (10-15 cm from the surface of the mudflat 7) at an angle of 30°-45°, with an insertion depth of 30-40 cm. A small gap of 2-5mm is left between the two sides of the flow channel layer 2 and the inner side of the support member 4. The support member 4 provides reliable lateral restraint for the flow channel layer 2, preventing it from moving laterally. A small amount of environmentally friendly anti-corrosion grease (such as natural tung oil) can be applied to the nested part between the central shaft 21 and the support member 4.

[0050] Wave protrusions 22: Two to three rows of arc-shaped, water-collecting wave protrusions 22 are integrally formed in the lower middle region (1 / 3 of the height from the bottom surface) of the two inclined surfaces of the flow channel layer 2. The wave protrusions 22 have a smooth, arc-shaped transition structure. The wave protrusions 22 are 8 to 12 mm high and 15 to 25 mm wide. The spacing between adjacent wave protrusions 22 in the same row is 15 to 25 mm, and they are evenly distributed. Under the driving force generated by the tidal current acting on the wave protrusions 22, the flow channel layer 2 can adaptively oscillate back and forth around the central axis 21 within the range of 0° to 30°. The rotation angle is naturally limited by the internal space of the device and the physical constraints of the inclined surface layer 1 and the tidal flat 7. The rotation speed is naturally adjusted by the combined resistance of seawater, the weight of the device, and the water and sand damping in the perforated tube 23.

[0051] Adaptive oscillation control: When the tide flow velocity is high, the wave bulge 22 is subjected to water pressure, causing the guide channel layer 2 to rotate around the central axis 21 (range 0°~30°). When the wind is strong, the wind pressure can drive the guide channel layer to rotate around the central axis, realizing water-wind dual-power adaptive control. The rotation angle of the guide channel layer 2 is naturally limited by the internal space of the device and the physical constraints of the inclined layer 1 and the tidal flat 7. The rotation speed is naturally regulated by the seawater resistance, the device's own weight, and the water and sand damping in the orifice 23. Generally, no additional limiting, speed regulating, or damping components are needed to achieve smooth oscillation. Effects: The 0-30° oscillation of the flow channel layer 2 consumes water flow energy and reduces the impact of tidal water flow on the device. The wind-driven rotation also consumes some wind energy, reducing the direct effect of strong wind on the device, forming a water-wind dual-power buffer protection. During the rotation, the vibration and attitude change of the device cause the seeds and fine sand remaining in the orifice 23 and the rhomboid opening 11 of the inclined layer 1 to fall quickly under the action of gravity, avoiding channel blockage. The slight vibration generated by the oscillation can also prevent sand accumulation and seed jamming in the side holes 231 of the orifice 23, while driving the surrounding water flow, further improving the water-sand separation efficiency and providing a smooth channel for seed to fall.

[0052] Seed falling path: The seed falls freely through the rhomboid opening 11 of the inclined layer 1 to the 60° inclined surface of the flow channel layer 2, slides into the 60° inclined pore tube 23, rolls naturally along the pore tube 23, falls vertically from the bottom opening of the pore tube 23, passes through the 3-5cm gap between the flow channel layer 2 and the germination auxiliary layer 3, and falls directly into the jute rope net layer 31 area of ​​the germination auxiliary layer 3 below.

[0053] Inclination design: Both the inclined layer 1 and the guide channel layer 2 adopt an inclination angle of 60°, which not only adapts to the direction of the tidal flow of the coastal tidal flat, maximizing the reception of water flow and seeds, but also ensures that the seeds fall smoothly under the action of gravity. At the same time, the wave protrusion 22 can effectively catch the water flow and generate driving force to drive the guide channel layer 2 to swing, thus taking into account the dual functions of seed interception and water flow driving.

[0054] The side holes 231 of the perforated tube 23 are designed as follows: each perforated tube 23 has 12 to 20 side holes 231, each 1 to 1.5 mm in diameter. This number and diameter design ensures rapid discharge of water and fine sand, achieving water-sand separation, while preventing seeds from escaping due to excessively large hole diameters or insufficient water-sand separation due to insufficient number of holes. Furthermore, the side holes are arranged in multiple directions around the perforated tube 23 to accommodate the oscillating conditions of the flow channel layer 2, ensuring stable water-sand separation at different oscillation angles. Too few side holes 231 will easily lead to insufficient separation and untimely drainage and sand removal; too many side holes will reduce structural strength, increase the probability of clogging, and have limited improvement in separation effect.

[0055] III. Germination Auxiliary Layer 3 Structure The germination auxiliary layer 3 is located directly below the seed cutting device. It is a multi-layered thin-layer composite structure, covering the same area as the bottom surface of the seed cutting device, with a thickness of 3 cm, and is tightly attached to the original tidal flat 7 substrate. For example... Figure 4As shown, from top to bottom, the layers are: jute rope mesh layer 31, jute fiber pollen-holding layer 32, and improved layer 33 (zeolite powder + bentonite fine powder). The jute rope mesh layer 31 and the jute fiber pollen-holding layer 32 are sewn together with jute thread (sewing interval approximately 20cm). The improved layer 33 is laid below the jute fiber pollen-holding layer 32. The germination auxiliary layer 3 is fixed by bamboo sticks 5 inserted vertically into the mudflats 7 at 20-30cm intervals. The bamboo sticks are biodegradable, forming an integral mesh fiber structure to prevent stratification and displacement under tidal action. The improved layer 33, laid below the jute fiber pollen-holding layer 32, prevents the improved powder from being eroded away by the tides while not hindering the seeds of *Suaeda salsa* from penetrating the fiber layer and implanting. The zeolite powder and bentonite fine powder in the improved layer 33 work synergistically to achieve water retention, salinity reduction, and salt reversion suppression, adapting to the germination environment requirements of *Suaeda salsa* seeds. The germination auxiliary layer 3 is fixed by inserting bamboo sticks 5 vertically into the mudflats 7 at intervals of 20-30cm. The bamboo sticks are biodegradable.

[0056] The germination auxiliary layer 3 receives the seeds falling from the guide channel layer 2. Its layered structure prevents the loss of the improvement powder and ensures seed implantation. At the same time, the salt reduction and water retention function of the improvement layer 33 can improve the seed germination rate. The bamboo sticks fixing the germination auxiliary layer 3 can prevent the layer from shifting due to tidal erosion and ensure that it can stably support the seeds, forming a closed loop with the seed falling function of the guide channel layer 2.

[0057] Based on the hydrodynamic differences (submersion duration and scouring intensity) among high tide, mid tide, and low tide, the germination auxiliary layer 3 adopts differentiated parameters to uniformly adapt the seed falling path of the seed cutting device, ensuring "powder fixation without blocking seeds, long-term salinity reduction, and standby germination." At the same time, the germination auxiliary layer 3 uses biodegradable jute material and ecological improvement materials. After the seeds of Suaeda salsa germinate in spring, they can be removed or retained. Retention does not affect the growth of Suaeda salsa seedlings and can continue to play a role in salinity reduction and water retention, helping seedlings to establish themselves. It can be naturally degraded after a period of time.

[0058] 3.1 Standardized material requirements: Improved material ratio: zeolite: bentonite = 3:1 (mass ratio), mixed evenly by dry mixing, without lumps or impurities; Zeolite: 40-80 mesh medium-fine powder, free of obvious impurities, to ensure ion exchange efficiency; Bentonite: 100-200 mesh fine powder, free of obvious impurities, with good binding, water retention and salt suppression functions; Jute fiber holding layer 32: jute short chopped loose fibers (1~2cm in length), loosely and randomly laid out, compacted after laying, without clumping; Jute rope net layer 31: Woven with anti-corrosion treated jute thread, with a thread diameter of 2~3mm, it is resistant to seawater corrosion, not easy to rot, and can be naturally degraded. The degradation cycle is basically matched with the planting cycle of Suaeda salsa seedlings.

[0059] 3.2 High Tide Beach Germination Auxiliary Layer: High tide beach environment characteristics: less flooding, strong wind, strong evaporation, weak erosion, and the three parameters of the germination auxiliary layer are adapted as follows: Jute rope net layer 31: Single-layer loose net with square mesh size of 1.0-2.0cm. After laying, it maintains a gap of 3-5cm with the bottom surface of the flow channel layer 2. The edge is fixed by the auxiliary layer bamboo sticks 5 to facilitate seed passage. Jute fiber dust-holding layer 32: thickness 0.3-0.5cm (after compaction), dosage 80-100g / m² 2 It is laid under the rope net and sewn to the rope net (one node is sewn every 20cm) to hold the improved powder and prevent it from blocking the seeds; Improved layer 33: Thickness 0.5–1.0 cm (after compaction), dosage 30–40 g / m² 2 It is evenly laid under the fiber layer and closely adheres to the original tidal flat substrate without gaps. It reduces rhizosphere salinity through ion exchange and is suitable for the strong evaporation characteristics of the high tide tidal flat.

[0060] 3.3 Auxiliary layer for germination in mid-tidal flats: Environmental characteristics of mid-tidal flats: moderate flooding and moderate scouring; the three parameters of the germination auxiliary layer are adapted as follows: Jute rope net layer 31: Single-layer medium-dense net with square mesh size of 0.8-1.0cm. After laying, it maintains a gap of 3-5cm with the bottom surface of the diversion channel layer 2. The edges are fixed with bamboo sticks to ensure both seed placement and erosion resistance. Jute fiber dust-holding layer 32: thickness 0.4-0.6cm (after compaction), dosage 100-120g / m² 2 It is laid under the rope net and sewn to the rope net to enhance the powder-fixing ability and is suitable for medium scouring intensity. Improved layer 33: Thickness 1.0~1.5cm (after compaction), dosage 40~50g / m² 2 It is evenly laid under the fiber layer and closely adheres to the original tidal flat 7 substrate without gaps, which improves the long-term effectiveness of salt reduction and is suitable for moderate flooding environments.

[0061] 3.4 Low Tide Shore Germination Auxiliary Layer: Characteristics of low tide beach environment: long flooding time, strong scouring, easy erosion, and the following three parameters are suitable for the germination auxiliary layer: Jute rope net layer 31: Single-layer loose net (facilitates seed drop), square mesh 1.0-1.5cm, after laying, maintain a 3-5cm gap with the bottom surface of the guide channel layer 2, and fix the edges with bamboo sticks to prevent the seeds from being washed away; Jute fiber dust-holding layer 32: thickness 0.5-0.7cm (after compaction), dosage 120-150g / m² 2It is laid under the rope net and sewn to the rope net to strengthen the powder-fixing ability and prevent the improved powder from being eroded by the tide. Improved layer 33: Thickness 1.5–2.0 cm (after compaction), dosage 50–60 g / m² 2 It is evenly laid under the fiber layer and closely adheres to the original tidal flat 7 substrate without gaps, increasing the thickness of the improved layer 33, enhancing long-term salt reduction and erosion resistance, and adapting to the strong hydrodynamic environment of low tide tidal flats.

[0062] IV. Interlayer Connections and Positional Relationships: Seed cutting device and germination auxiliary layer 3: The two are fixed separately and do not interfere with each other. The lower surface of the extended bottom of the seed cutting device's guide channel layer 2 maintains a gap of 3-5cm with the jute rope net layer 31 of the germination auxiliary layer 3. This ensures that the seeds fall vertically to the germination auxiliary layer 3 and also provides sufficient space for the rotation of the guide channel layer 2 to avoid friction and jamming. The semi-enclosed side plate of the guide channel layer 2 is seamlessly connected to the extended bottom surface, completely wrapping the germination auxiliary layer 3 inside, so that the sides of the germination auxiliary layer 3 are not open to the outside. The inclined layer 1 freely covers the guide channel layer 2 without fixing or alignment. It only needs to cover the inclined area of ​​the guide channel, which is convenient for later disassembly and relocation. The germination support layer 3 is connected as follows: the jute rope net layer 31, the jute fiber powder-holding layer 32, and the improvement layer 33 are attached sequentially from top to bottom and fixed by jute thread (one node is sewn every 20cm), without gaps or misalignment, to avoid layering and displacement under the action of tides; Position and function of jute fiber pollen-holding layer 32: Located between jute rope net layer 31 and improvement layer 33, it forms a pollen-holding barrier structure, which can both block zeolite and bentonite fine particles of improvement materials to prevent them from being washed away by tides, and not hinder the seeds of Suaeda salsa in saline land from passing through and implanting. Central axis 21, support member 4 and flow channel layer 2: The two ends of the central axis 21 are inserted into the rotating holes of the support member 4. The support member 4 is used to achieve positioning and fixation. The nested clearance fit is adopted to enable the flow channel layer 2 to rotate independently around the central axis 21, while the inclined layer 1 remains stationary. The support member 4 is fixed to the mudflat 7. The three do not interfere with each other and do not affect the realization of their respective functions.

[0063] V. Fixing Method The system adopts a fixing system of "auxiliary layer bamboo sticks 5 + seed cutting device support 4 + seed cutting fixing bamboo sticks 6". The support 4 is made of environmentally friendly and anti-corrosion treated hardwood (such as poplar or pine), with a diameter of 8~12mm. All of them are processed with anti-corrosion barbs 61 and wrapped with jute fibers. Optional jute sandbags can be added for reinforcement (mandatory addition only in low tide areas) to ensure that the device does not slip, overturn, or be lifted under the action of rising and falling tides (maximum flow velocity ≤1.0m / s). At the same time, it ensures that the fixing of the germination auxiliary layer 3 is not damaged when the seed cutting device is disassembled. The specific fixing method is as follows: 5.1 Auxiliary layer bamboo skewers 5 Material and Use: Biodegradable bamboo (such as thin strips of moso bamboo) is preferred; it is used to fix the germination auxiliary layer 3 and has no connection with the seed cutting device; Fixing method: From top to bottom, only penetrate the germination auxiliary layer 3 (jute rope net layer 31, jute fiber pollen-holding layer 32, and improvement layer 33), insert the lower end into the original mudflat 7 about 30-40cm, and the upper end is flush with the jute rope net layer 31 without protruding, so as to avoid interfering with the rotation and disassembly of the seed cutting device; Anti-erosion treatment: Process 3-4 evenly distributed barbs 61 at the lower end (1cm in high tide, 1.5cm in mid tide, and 2cm in low tide), insert them into the lower end of the mudflat 7 (5cm in high tide, 6cm in mid tide, and 8cm in low tide), and tightly wrap them with a layer of jute fiber. Optional jute sandbags can be added for reinforcement (mandatory addition in low tide areas, optional in mid- and high-tide areas).

[0064] 5.2 Cutting and fixing the bamboo sticks 6 Fixing method: Penetrate the edge of the double slope of the guide channel layer 2, insert the lower end into the mudflat 7 at least 40cm, and make the upper end as flush with the bottom edge of the slope layer 1 as possible to fix the main body of the seed cutting device. Anti-erosion treatment: Similar to the auxiliary layer bamboo stick 5, the lower end is processed with 3-4 evenly distributed barbs 61 (1cm in length for high tide, 1.5cm for mid-tide, and 2cm for low tide), inserted into the lower end of the mudflat 7 (5cm for high tide, 6cm for mid-tide, and 8cm for low tide), and tightly wrapped with a layer of jute fiber. Jute sandbags can be added for reinforcement (mandatory addition in low tide area, optional for mid- and high-tide areas); Post-planting care: After the seedlings of Suaeda salsa are planted (in the summer of the same year), when removing the seed cutting device, only the seed cutting fixing bamboo stick 6 needs to be pulled out, without touching the bamboo stick fixing the germination auxiliary layer 3, and without damaging the fixing of the germination auxiliary layer 3.

[0065] 5.3 Fixing of support member 4 to central shaft 21 Support component 4: The lower end is inserted into the mudflat 7 at least 40cm, and the anti-erosion treatment is the same as other bamboo sticks (barbs 61 + jute wrapping, jute sandbags added in low tide area). The upper end is connected to the central axis 21 through a round hole, which not only supports the central axis 21, but also helps to fix the seed cutting device. Auxiliary fixing component 41: Two of each support component 4 are symmetrically distributed on the outside of the support component 4; the main material is a thin strip of hardwood (8~10mm in diameter) treated with environmental protection and anti-corrosion. It is driven into the mudflat 7 at an angle of 30°~45° for about 30~40cm from the upper part of the support component 4 (10~15cm from the surface of the mudflat 7), forming a double triangular support structure with the vertically inserted support component 4, which strengthens the wave and current resistance of the support component 4; the anti-erosion treatment of the lower end is the same as that of the support component 4 and the seed cutting fixing bamboo stick 6 (processing 3~4 evenly distributed barbs 61, the barb 61 length is 1cm in high tide mudflat, 1.5cm in mid tide mudflat and 2cm in low tide mudflat, the lower end inserted into the mudflat 7 is wrapped with a layer of jute fiber, and jute sandbags are forcibly added to the low tide area for reinforcement); when the seed cutting device is removed later, it is pulled out at the same time as the support component 4 and the central shaft 21.

[0066] Central shaft 21: The central shaft 21 is integrally formed with the flow channel layer 2. Both ends are inserted into the round holes (rotation holes of the support 4) of the support member 4. The support member 4 is used to achieve positioning and fixation. When the seed cutting device is disassembled and moved later, the central shaft 21 and the support member 4 are pulled out simultaneously. Jute sandbag compaction details (optional): Biodegradable jute sandbags are used, filled with local fine sand from the mudflat 7. One sandbag is placed at the base of each bamboo stick and auxiliary fixing part 41 (where it contacts the surface of the mudflat 7). The center hole of the sandbag is made and fits onto the corresponding part. After compaction, it fits tightly against the mudflat 7. This is added in the low tide zone and can be omitted in the mid-high tide zone.

[0067] Material selection: The support component 4 and the auxiliary fixing component 41 are made of environmentally friendly and corrosion-resistant hardwood, and the sprouting layer is fixed with barbed bamboo sticks 61. Both types of materials are suitable for the corrosive environment of seawater and the needs of coastal wetland ecological restoration. The anti-corrosion treatment of hardwood can extend its service life and is suitable for long-term immersion conditions in the intertidal zone. The bamboo sticks have biodegradable properties. At the same time, the high strength of hardwood and the friction of bamboo sticks can resist tidal erosion and are suitable for strong water flow conditions.

[0068] VI. Floor Plan Layout All seed-cutting and germination-promoting units are arranged in a staggered, triangular pattern on the beach. Before layout, the beach surface is marked out to ensure even distribution and facilitate smooth tidal flow. Specific parameters are as follows: Unit spacing: Horizontal spacing 50-80cm (horizontal distance between the centers of adjacent units), vertical spacing 50-80cm (vertical distance between the centers of adjacent units); Laying out the lines: The position of the first row of units is determined based on the tidal flat 7 tidal channel. Subsequent units are arranged in a staggered pattern to adapt to the undulating terrain of tidal flat 7 and are evenly distributed. Advantages of this layout: This layout ensures smooth tidal flow, reduces water erosion on the device, improves the uniformity of seed capture, facilitates later inspection, maintenance and seedling transplantation and growth, and also makes it easy to dismantle and move the seed capture device in units later.

[0069] VII. Overall System Working Process 1. Seed interception and screening: Wind or tide carries Suaeda salsa seeds, coarse sand, fine sand and water through the device → inclined layer 1 as a pre-filter to intercept coarse sand with a particle size ≥2mm. The coarse sand rolls down the 60° inclined surface to the mudflat 7; the seeds (diameter 1~2mm), fine sand (particle size <1mm) and water fall through the diamond-shaped opening 11 onto the 60° inclined surface of the lower guide channel layer 2; 2. Flow diversion and sand removal: After the water falls onto the diversion slope along with the seeds and fine sand, some of the water and fine sand enter the perforated pipe 23. The water and fine sand seep out from the annular side hole 231 of the perforated pipe 23 and enter the closed space inside the diversion channel layer 2. They are then discharged to the mudflat 7 through the strip-shaped sand discharge port 121 in the middle of the closed area of ​​the side plate, without accumulating in the device or entering the germination auxiliary layer 3. The annular side hole 231 improves the water and sand separation efficiency without affecting the seed falling. The enclosed structure formed by the closed side plate and the extended bottom surface prevents the water flow from impacting the germination auxiliary layer 3. 3. Directional seed transport: Seeds falling on the guide slope slide into the 60° inclined pore tube 23 under the action of gravity and the rotation of the guide channel layer 2 (the inclination angle of the slope and the pore tube 23 is consistent to ensure smooth sliding) → roll naturally down along the pore tube 23, fall vertically from the bottom opening of the pore tube 23, pass through the gap between the guide channel layer 2 and the germination auxiliary layer 3 → fall directly onto the jute rope net layer 31 of the germination auxiliary layer 3; 4. Seed implantation: The seed passes through the mesh of the jute rope net layer 31 → through the gaps of the jute fiber pollen-holding layer 32 → lands on the surface of the improved layer 33, completing implantation, and waits for germination at a suitable temperature; 5. Improved layer 33 waits for salinity reduction: Improved layer 33 is stable in the 0-2cm layer of the tidal flat 7 for a long time and is not eroded by tides (the jute fiber pollen-holding layer 32 plays a role in fixing the pollen) → During high tide, the tidal water soaks the improved layer 33, and the zeolite and bentonite reduce the salinity of the rhizosphere through cation exchange, forming a low-salt microenvironment → Seeds remain on the surface of improved layer 33, realizing "waiting for germination"; 6. Suitable temperature germination: When the ambient temperature reaches the suitable temperature for the germination of Suaeda salsa seeds and the moisture is suitable, the seeds germinate, take root and establish themselves in the low-salt, water-retaining improved layer 33, completing the natural recovery of Suaeda salsa; the germination auxiliary layer 3 can be removed or retained, and if retained, it can be naturally degraded. 7. Energy Dissipation and Anti-Clogging: When the tidal flow velocity is high, the wave protrusions 22 on the inclined surface of the guide channel layer 2 collect water and are subjected to force, which drives the guide channel layer 2 to rotate around the central axis 21 within the range of 0~30° (the inclined surface layer 1 remains stationary, and the two do not interfere with each other; the gap between the guide channel layer 2 and the germination auxiliary layer 3 ensures smooth rotation). When driven by water flow, some tidal kinetic energy is consumed. When the wind is strong, the wind pressure is transmitted through the inclined surface layer and the support components, which together drive the guide channel layer to rotate around the central axis, which also consumes some wind energy. The rotation can alleviate the scouring of the device and the germination auxiliary layer 3. At the same time, during the rotation, the seeds and fine sand remaining in the perforated tube 23 and the rhomboid opening 11 of the inclined surface layer 1 fall quickly under the action of gravity and vibration, avoiding channel blockage and ensuring long-term stable operation of the device. The anti-erosion treatment of the bamboo sticks (barbs 61 + jute wrapping, jute sandbags in the low tide zone) effectively resists tidal erosion and ensures the device is fixed and stable. 8. Post-processing (adapting to the dismantling and relocation requirements of the seed cutting device): After the Suaeda salsa seedlings are planted in the same year, the seed cutting fixing bamboo sticks 6, auxiliary fixing parts 41, and support parts 4 are manually removed, and the inclined layer 1 and the flow channel layer 2 (i.e., the seed cutting device) are removed to achieve overall dismantling and relocation; the germination auxiliary layer 3 is removed or left in the mudflat 7 to continue to play a role in reducing salinity and retaining water, helping seedling growth, and can also be naturally degraded after being left in the mudflat 7; the dismantled seed cutting device can be cleaned and maintained and then reused in other mudflat 7 restoration areas to improve the utilization rate of the device; 9. Environmental adaptability: The device does not have additional limit switches or speed control components, making it suitable for long-term unattended operation in the intertidal zone. This reduces potential failure points and prevents device failure due to component damage. Rotation control is achieved through physical limits, natural damping, and gravity reset, which can adapt to the periodic effects of tidal flow and wind, reduce maintenance costs, and meet the application needs of coastal wetland restoration.

[0070] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device integrating seed cutting and germination promotion for Suaeda salsa in saline-alkali soil, characterized in that, include: The inclined layer is a double-inclined triangular shell structure with diamond-shaped openings in its inclined area and semi-enclosed vertical side plate structures on both sides that are closed at the bottom and open at the top. The flow channel layer is located below the inclined layer and has a double-inclined triangular structure. Several inclined perforated tubes are provided on its inclined surface, and several side holes are provided on the wall of the perforated tubes. The center of the flow channel layer is integrally formed with a central axis, and the lower part of its inclined surface has wavy protrusions. The germination support layer is located below the flow channel layer, and from top to bottom, it consists of the jute rope net layer, the jute fiber pollen-holding layer, and the improvement layer. The fixing system includes a support for fixing the central axis of the flow channel layer, an auxiliary layer bamboo stick for fixing the germination auxiliary layer, and a seed-cutting fixing bamboo stick for fixing the inclined layer. The inclined layer covers the flow channel layer, with its bottom surface contacting the mudflat, enclosing the flow channel layer and the germination aid layer inside; the flow channel layer can oscillate back and forth within a range of 0° to 30° around its central axis; the side plate of the inclined layer and the extended bottom surface of the flow channel layer form an enclosing structure, completely wrapping the germination aid layer inside; the device and the germination aid layer are fixed separately and do not interfere with each other.

2. The apparatus according to claim 1, characterized in that, The inclined surfaces of the sloped layer have an angle of 60° with the horizontal plane, the inclined surfaces of the flow channel layer have an angle of 60° with the horizontal plane, and the perforated tube has an angle of 60° with the horizontal plane; the diamond-shaped openings of the sloped layer are 5-8 mm long and 3-5 mm wide, with a density of 200-300 per square meter; the side plate has 5 vertical strip-shaped sand discharge outlets in the middle, each 4 cm long and 2 cm wide, arranged in a V-shape.

3. The apparatus according to claim 1, characterized in that, The inclined surface of the flow channel layer is 14-19cm long; the length of the perforated tube is 8-12cm, the diameter of the perforation is 3-4mm, and the density of the perforation is 200-250 tubes / square meter; the diameter of the side holes of the perforated tube is 1-1.5mm, and each perforated tube has 12-20 side holes, which are evenly distributed along the length of the perforated tube and arranged in multiple directions around the circumference.

4. The apparatus according to claim 1, characterized in that, The wave-like protrusions are arranged in the lower part of the inclined surface of the flow channel layer, in 2 to 3 rows. The height of the protrusions is 8 to 12 mm, the width is 15 to 25 mm, and the distance between adjacent protrusions in the same row is 15 to 25 mm.

5. The apparatus according to claim 1, characterized in that, The central axis extends outwards from both sides of the flow channel layer, with an extension length of 2-3 cm. The support members are symmetrically arranged on both sides of the flow channel layer, and a rotating hole is opened at the upper end of the support member. The two ends of the central axis extend into the rotating hole to form a clearance fit. A gap of 2-5 mm is left between the two sides of the flow channel layer and the inner side of the support member. The support member is vertically inserted into the mudflat more than 40 cm. Each support member is also equipped with an auxiliary fixing member. The support member is driven into the mudflat at an angle of 30°-45° from the upper part of the support member, with an insertion depth of 30-40 cm, forming a double triangular support structure.

6. The apparatus according to claim 1, characterized in that, The auxiliary layer bamboo sticks are vertically inserted into the mudflat at 20-30cm intervals, with an insertion depth of 30-40cm, and the upper end is flush with the jute rope net layer; the seed cutting and fixing bamboo sticks penetrate the sloping edge of the guide channel layer, are inserted into the mudflat 30-40cm, and are staggered from the support, auxiliary fixing parts, and auxiliary layer bamboo sticks.

7. The apparatus according to claim 1, characterized in that, The germination support layer consists of a jute rope mesh layer, a jute fiber powder-holding layer, and a modification layer from top to bottom, with an overall thickness of 3cm. The jute rope mesh layer and the jute fiber powder-holding layer are sewn together with jute thread at 20cm intervals. The modification layer is made of zeolite powder and bentonite fine powder mixed in a 3:1 mass ratio and is filled under the jute fiber powder-holding layer.

8. The apparatus according to claim 1, characterized in that, The total vertical height of the device is 14-18cm; the slope length of the inclined layer is 16-21cm; the vertical gap between the inclined layer and the flow channel layer is 20-30mm; and the gap between the flow channel layer and the jute rope net layer is 3-5cm.

9. The apparatus according to claim 1, characterized in that, The germination support layer is configured with differentiated thickness and material usage based on the hydrodynamic conditions of high tide, mid tide, and low tide shoals, wherein: High Tide Beach: Jute rope mesh layer with a mesh size of 1.0–2.0 cm, jute fiber holding layer thickness of 0.3–0.5 cm, and improvement layer thickness of 0.5–1.0 cm; Mid-tidal flats: jute rope netting mesh size 0.8–1.0 cm, jute fiber holding layer thickness 0.4–0.6 cm, amendment layer thickness 1.0–1.5 cm; Low tide beach: jute rope net layer mesh size 1.0-1.5cm, jute fiber holding layer thickness 0.5-0.7cm, improvement layer thickness 1.5-2.0cm.

10. A method for integrating seed cutting and germination promotion of Suaeda salsa in saline-alkali soil based on the device described in any one of claims 1 to 9, characterized in that, Includes the following steps: (1) Clean up debris on the surface of the tidal flat, and lay out the lines in a staggered triangular pattern to determine the installation points of the device; (2) The improved layer, jute fiber powder-holding layer and jute rope net layer are laid on the beach from bottom to top, and the auxiliary layer bamboo sticks are vertically inserted into the beach to fix them. (3) Insert the support vertically into the mudflat and insert the auxiliary fixing part obliquely to form a double triangular support structure; embed the central shaft of the flow channel layer into the rotating hole of the support to realize the swing assembly; use the cut bamboo stick to limit and fix the edge of the flow channel layer; (4) The inclined layer is placed on top of the flow channel layer, with the bottom edge attached to the mudflat to form a pre-filter and enclosed protection structure. (5) The wind or tide drives the seeds to migrate and flow through the device. The inclined layer intercepts coarse sand impurities, and the seeds enter the interior of the guide channel layer. Water and sand are separated by the side holes of the pore tube, and the seeds fall oriented along the pore tube to the germination auxiliary layer. (6) Seeds penetrate the jute rope net layer and the jute fiber pollen-holding layer and fall onto the surface of the improved layer; the improved layer continuously retains water, reduces salt, and inhibits salt return, thus creating a low-salt and stable germination microenvironment; (7) The wind or water flow impacts the wave protrusion structure, driving the flow channel layer to swing back and forth, realizing the functions of water flow energy dissipation, channel self-cleaning and anti-jamming; (8) After the seedlings of Suaeda salsa are planted, remove the bamboo sticks and supports for cutting the seeds and dismantle the cutting device; the germination auxiliary layer can be selectively retained or dismantled, the dismantled components can be recycled and reused, and the retained structure can be naturally degraded.

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