A device and method for vertical culture and bottom seeding of benthic shellfish

Abstract

The present application relates to the field of aquaculture, and particularly relates to a device and method for vertical seedling and bottom sowing and propagation of sessile shellfishes, comprising a culture frame and a culture tray, wherein the culture tray comprises a side plate, a shelf, a seedling attachment device and a connector, the side plate forms a rectangular frame, the top and bottom of the rectangular frame are open, a plurality of water-permeable holes are arranged on the side plate, the shelf is arranged in parallel on the outer side of the side plate, the seedling attachment device is arranged to block the opening at the bottom of the rectangular frame, the seedling attachment device is connected to the opening at the bottom through the connector, the culture frame comprises a three-dimensional frame and a shelf frame, the shelf frame is arranged in parallel inside the three-dimensional frame, and the shelf is arranged on the shelf frame. By using the device, the density of the seedlings during attachment can be adjusted, the density of the seedlings is made to be reasonable, and the suitable density for the growth of the seedlings is obtained.

Description

Technical Field

[0001] This invention relates to the field of aquaculture, specifically to a device and method for vertical seeding and bottom seeding propagation of burrowing shellfish. Background Technology

[0002] Benthic mollusks are important biological species for expanding the utilization of shallow sea bottom space in northern my country. The supply of seedlings of suitable size is a crucial link in artificial aquaculture. Currently, provinces such as Shandong and Liaoning have successfully carried out seedling breeding of various benthic mollusks, including blood clams, blue clams, and razor clams. Bottom seeding of mollusks is a major task in shallow sea aquaculture and a key way to increase production and income. Traditional bottom seeding methods involve directly scattering mollusks into shallow water. However, due to the influence of waves, currents, and tides, the mollusks drift with the seawater, making it difficult to seed them in the designated area, thus affecting the effectiveness of bottom seeding for mollusks propagation.

[0003] Therefore, the current shellfish farming process requires different equipment for the two operations of shellfish seedling cultivation and seeding, and the seedlings are prone to damage and loss during the seedling cultivation and seeding process. These are problems that urgently need to be solved by those skilled in the art. Summary of the Invention

[0004] To address the problems existing in the prior art, the purpose of this invention is to provide an integrated device for burial shellfish seedling cultivation and sowing, which can ensure shellfish growth during seedling cultivation and ensure that the shellfish's position in the mudflats changes relatively little during sowing, and can promptly locate the shellfish for sowing. The invention also includes a method for using the shellfish seedling cultivation and propagation device.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a device for vertical seeding and bottom seeding propagation of burial shellfish, comprising a culture frame and a culture tray. The culture tray includes a side plate, a support bar, a seedling attachment device, and a connector. The side plate forms a rectangular frame with openings at the top and bottom. The side plate is provided with several water-permeable holes. The support bar is arranged parallel to the outside of the side plate. The seedling attachment device is supported at the bottom opening of the rectangular frame and connected to the bottom opening through the connector. The culture frame includes a three-dimensional frame and a support bar frame. The support bar frame is arranged parallel to the inside of the three-dimensional frame, and the support bar is placed on the support bar frame.

[0006] The aforementioned device for vertical seeding and bottom seeding propagation of burial shellfish includes a three-dimensional frame comprising an upper frame, a lower frame, side rods, a rear stop rod, and a front stop rod. The outer diameter of the upper frame is larger than the outer diameter of the lower frame. The side rods connect the upper frame and the lower frame from both sides. The front stop rod and the rear stop rod connect the upper frame and the lower frame from the front and rear sides. The support frame is arranged parallel to the upper frame on the side rods.

[0007] The aforementioned device for vertical seeding and bottom seeding propagation of burial shellfish uses a silk screen as the seedling attachment device. The seedling attachment device includes a net body and a net edge. The net edge is located in the circumferential direction of the net body and is connected to the bottom periphery of the side plate through the connector.

[0008] The above-mentioned device for vertical seeding and bottom seeding propagation of burial shellfish includes a seedling attachment device comprising a growth plate, a support plate, and a slot. The slot is located on the inner side of the bottom of the side plate. The growth plate is placed horizontally inside the frame. The growth plate is provided with several water-permeable holes. The support plate is inserted into the slot. The growth plate is parallel to the support plate.

[0009] The aforementioned device for vertical seeding and bottom seeding propagation of burial shellfish has several micropores on the tray, and nanotubes are provided at the bottom of the tray, which release nanobubbles upwards.

[0010] The aforementioned device for vertical seeding and bottom seeding propagation of burial shellfish includes a culture tray that further includes reinforcing strips disposed below the slots. The support plate includes a first support plate and a second support plate. The first support plate is inserted into a slot on the front side of the growth plate, and the second support plate is inserted into a slot on the rear side of the growth plate.

[0011] In the aforementioned device for vertical seeding and bottom seeding propagation of burial shellfish, the rear stop bar is fixedly connected to the upper and lower frame respectively, the front stop bar is rotatably connected to the lower frame via a pivot structure, and the front stop bar is connected to the upper frame via a locking structure.

[0012] The aforementioned device for vertical seeding and bottom seeding propagation of burial shellfish includes, depending on the height of the culture frame, at least three culture trays arranged sequentially from top to bottom within the culture frame, with the width of the culture trays decreasing sequentially from top to bottom, and the culture trays being staggered front to back within the culture frame.

[0013] The aforementioned device for vertical seeding and bottom seeding propagation of burial shellfish includes a tray cover with several water-permeable holes, which is placed over the top opening of the tray.

[0014] A method for vertical seeding and bottom seeding propagation of burrowing mollusks includes the following steps: Step 1: Place the culture frame in the culture area and sow the shellfish seedlings in the three-dimensional frame. At this time, the seedlings are in the planktonic stage and are suspended within the three-dimensional frame. Spread the attached culture powder sand at the bottom of the culture frame and insert the culture frame into the three-dimensional frame along the shelf. Place the culture trays in order from small to large, starting from the bottom of the culture frame and working upwards. Step 2: When the shellfish seedlings are shellfish with a fast burrowing speed, use the device described above for vertical seeding and bottom seeding propagation of burrowing shellfish to carry out vertical seeding and bottom seeding propagation. When the shellfish seedlings enter the growth state of attaching to the bottom layer, the shellfish seedlings are continuously cultivated, and Step 3 is carried out when the shellfish seedling cultivation enters the sowing period. Step 3: Pull the breeding tray out from the three-dimensional frame and after reaching the sowing area, directly invert the breeding tray onto the breeding area so that the seedlings during the sowing period attach to the breeding area; Step 4: When the shellfish larvae are slow-diving shellfish, use the device described above for vertical seeding and bottom seeding of buried shellfish for vertical seeding and bottom seeding. When the shellfish larvae enter the growth state of attaching to the bottom layer, release nanobubbles and put food into the culture frame. The shellfish continue to grow on the growth plate. When the shellfish larvae enter the sowing period, proceed to Step 5. Step 5: Once the shellfish have grown to the seeding size, remove the culture tray from the culture frame and transfer it to the seeding location; Step 6: Pull the tray out from the bottom slot at the seeding position, and place the tray cover over the top opening of the culture tray. The shellfish can then enter the seabed of the seeding area by following the tray removal position.

[0015] The beneficial effects of the device and method for vertical seeding and bottom seeding propagation of burrowing shellfish of the present invention are as follows: By using the device of the present invention, the density of seedlings during attachment can be adjusted to achieve a reasonable density and suitable growth density. The use of a silk screen maintains good permeability, ensuring a favorable environment for seedling cultivation. It is convenient and efficient for cultivating shellfish that burrow quickly into the sand. Furthermore, by using a propagation device with a support plate and a growth plate, when cultivating shellfish that burrow slowly into the sand, the support plate can be directly removed from the bottom once the shellfish are already growing in the culture sand, facilitating continued growth. This invention suspends the culture trays within the culture frame using a support frame and supports, facilitating water circulation and promoting shellfish growth. Water-permeable holes in the trays allow for constant water exchange between the trays and the outside of the culture frame. The staggered placement of the trays ensures even attachment of the planktonic larvae, preventing overcrowding. The spacing between the parallel trays facilitates observation of larval growth. A locking, rotating front stop prevents the trays from being pushed or pulled in and out of the culture frame, allowing for continuous monitoring. Nanotubes on the trays create microbubbles, enriching the culture tank with oxygen and inhibiting microorganisms within the trays, thus degrading shellfish excrement and improving survival rates. Slots allow the trays to be installed within the frame; when placing larvae in the culture area, the trays can be easily removed for sowing. A cover protects the larvae from animal consumption. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the aquaculture frame structure of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the aquaculture tray of the present invention; Figure 4 This is a side view of the first aquaculture tray of the present invention; Figure 5 This is a side view of the second aquaculture tray of the present invention; Figure 6 This is a schematic diagram of the aquaculture area layout according to the present invention.

[0017] Explanation of reference numerals in the attached drawings: 10, breeding frame; 11, upper frame; 12, lower frame; 13, side bar; 14, rear stop bar; 15, front stop bar; 16, rotating shaft structure; 20, breeding tray; 21, frame; 22, growth board; 23, tray; 24, shelf; 25, side plate; 26, slot; 27, net body; 28, net edge; 30, water injection pipe; 31, main water inlet; 32, auxiliary water inlet; 33, drain outlet; 40, walkway. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution and objectives of the present invention, the technical solution and objectives of the present invention will be described below in conjunction with specific embodiments and accompanying drawings.

[0019] Example 1 This embodiment mainly explains the propagation and seeding device for slow-buried shellfish, such as... Figure 1-4 As shown, a device for vertical seeding and bottom seeding propagation of burial shellfish includes a culture frame 10 and a culture tray 20. The culture frame includes a three-dimensional frame and a shelf, which are welded together using rods. The three-dimensional frame includes an upper frame 11, a lower frame 12, side rods 13, a rear stop rod 14, and a front stop rod 15. The outer diameter of the upper frame is larger than that of the lower frame. The side rods connect the upper frame and the lower frame from both sides. The front stop rod and the rear stop rod connect the upper frame and the lower frame from the front and rear sides. The shelf is arranged parallel to the upper frame on the side rod and is located inside the three-dimensional frame.

[0020] Furthermore, to facilitate the placement and removal of the breeding tray, the rear stop bar of the breeding frame is fixedly connected to the upper and lower frames respectively, the front stop bar is rotatably connected to the lower frame via a pivot structure 16, and the front stop bar is connected to the upper frame via a locking structure. By opening the locking structure, the front stop bar can be rotated, thereby pulling the breeding tray out of the breeding frame. The locking structure can be fixed using bolts and screw holes or by using straps.

[0021] The culture tray includes a rectangular frame 21, a seedling attachment device, and a connector. The rectangular frame is enclosed by side plates 25, and both the top and bottom of the rectangular frame are open. The seedling attachment device is connected to the bottom opening of the rectangular frame through the connector. The support strips 24 are horizontally set on the left and right sides of the rectangular frame. The seedling attachment device is supported at the bottom opening of the rectangular frame. The seedling attachment device includes a growth plate 22 and a support plate 23. The connector uses a slot 26 set below the side plate. The side plate is provided with several water permeable holes. The support strips are set on the outside of the side plate, and the slot is set on the inside of the bottom of the side plate. The growth plate is placed inside the frame. A growth plate frame can be set at the lower middle position of the side plate. The growth plate is placed flat on the growth plate frame. The growth plate is provided with several water permeable holes. The support plate is inserted into the slot. The growth plate and the support plate are parallel. The distance between the growth plate and the support plate is 1-5 cm, which is set according to the thickness of the culture sand and the size of the shellfish.

[0022] The frame and tray are connected by slots to form a box-shaped structure with an open top. The shelf is placed on the shelf frame to fix it and prevent the breeding tray from bobbing up and down under the impact of water flow. The rear end of the shelf frame is provided with an upward-folding shelf groove, in which the shelf is inserted. The front is fixed by pushing with a front stop bar. Alternatively, a baffle can be set at the front end of the shelf frame, so that the shelf is inserted through the gap between the baffle and the shelf frame when pushing or pulling.

[0023] Furthermore, to facilitate water flow and nutrient replenishment, the tray is equipped with several micropores, and nanotubes are installed at the bottom of the tray, releasing nanobubbles upwards from the nanotubes.

[0024] Furthermore, the culture tray also includes reinforcing strips positioned below the slots. The support plate includes a first support plate and a second support plate. The first support plate is inserted into a slot on the front side of the growth plate, and the second support plate is inserted into a slot on the rear side of the growth plate. By using the first and second support plates, the support plate can be more easily removed from both sides.

[0025] Depending on the height of the breeding frame, at least three breeding trays should be placed inside the breeding frame from top to bottom, with the width of the breeding trays decreasing from top to bottom.

[0026] In order to prevent the loss of shellfish seedlings during bottom seeding propagation, the culture tray also includes a tray cover with several water-permeable holes. The tray cover is placed on the top opening of the culture tray.

[0027] Example 2 The similarities between this embodiment and Embodiment 1 will not be repeated here. The difference lies in the different breeding trays.

[0028] The aquaculture tray described in this embodiment is mainly used for shellfish species that burrow quickly into the sand, such as... Figure 5 As shown, the aquaculture tray in this embodiment also includes a side plate, support strips, seedling attachment device, and connectors. The seedling attachment device uses a silk screen made of synthetic fiber material with an opening of 80-100 mesh. The silk screen includes a mesh body 27 and a mesh edge 28. The mesh edge is set along the perimeter of the mesh body. The mesh body is cut to size according to the bottom opening of the rectangular frame formed by the side plate. The mesh edge extends outward by 2-4 cm around the perimeter of the mesh body. Generally, the mesh edge extends outward by 2 cm from the edge of the mesh body. The extension length of the mesh edge is related to the thickness of the aquaculture sand. The mesh edge is connected to the bottom perimeter of the side plate by connectors. The connectors can be fixed with adhesive, pressure strips, or stitching. Using existing fixing methods, the mesh edge is fixed to the bottom of the side plate, making the mesh body the base of the aquaculture tray. Using a silk screen can better enhance the permeability of the water in the aquaculture tray.

[0029] Example 3 This embodiment describes a method for vertical seeding and bottom seeding propagation of shellfish species that burrow slowly in the sand. A method for vertical seeding and bottom seeding propagation of burrowing shellfish is described in Example 1. The method includes the following steps.

[0030] Step 1: Insert the tray into the frame along the slot, place the growth plate in the frame above the tray, and put the culture sand into the culture frame.

[0031] Step 2: Place the culture frame in the culture area and sow the shellfish seedlings inside the three-dimensional frame. At this time, the seedlings are in the planktonic stage and are suspended within the three-dimensional frame. Spread the culture sand at the bottom of the culture frame and insert the culture frame into the three-dimensional frame along the shelf. Place the culture trays in order of increasing size from the bottom of the culture frame upwards.

[0032] Step 3: When the shellfish larvae enter the growth stage of attaching to the bottom layer, release nanobubbles and put food into the breeding frame. The shellfish continue to grow on the growth plate. When the shellfish larvae cultivation enters the sowing period, proceed to Step 4.

[0033] Step 4: Once the shellfish have grown to the seed size, remove the culture tray from the culture frame and transfer it to the seeding location.

[0034] Step 5: Pull the tray out from the bottom slot at the seeding position, and place the tray cover over the top opening of the culture tray. The shellfish can then enter the seabed of the seeding area by following the tray removal position.

[0035] When using this method for vertical seeding and bottom seeding of shellfish, since shellfish spend a long time burrowing in the sand, the bottom opening method can take advantage of the shellfish's previous burrowing in the culture sand. After the tray is removed, the culture sand comes into direct contact with the mud and sand in the culture area, which facilitates the shellfish's burrowing in the sand and accelerates the burrowing speed.

[0036] Example 4 This embodiment describes a method for vertical seeding and bottom seeding propagation of shellfish species that burrow quickly into the sand. A method for vertical seeding and bottom seeding propagation of burrowing shellfish is described in Example 2. The method includes the following steps.

[0037] Step 1: Place the culture frame in the culture area and sow the shellfish seedlings inside the three-dimensional frame. At this time, the seedlings are in the planktonic stage and are suspended within the three-dimensional frame. Spread the attached culture powder sand at the bottom of the culture frame, insert the culture frame into the three-dimensional frame along the shelf, and place the culture trays in order from small to large, starting from the bottom of the culture frame and moving upwards.

[0038] Step 2: When the shellfish seedlings are shellfish with a fast burrowing speed, use the device in Example 2 for vertical seeding and bottom seeding propagation. When the shellfish seedlings enter the bottom sedimentation growth state, the shellfish seedlings are continuously cultivated, and Step 3 is carried out when the shellfish seedling cultivation enters the sowing period.

[0039] Step 3: Pull the breeding tray out from the three-dimensional frame and, after reaching the sowing area, directly invert the breeding tray onto the breeding area so that the seedlings during the sowing period attach to the breeding area.

[0040] When using this method for vertical seeding and bottom seeding of shellfish, the shellfish can quickly burrow into the sand. By simply placing the culture tray upside down in the culture area, the shellfish can quickly burrow into the sand while the culture sand settles, allowing for rapid retrieval of the culture tray. This reduces the cost of the culture tray and increases its utilization rate.

[0041] Example 5 like Figure 1-4 As shown, a device for vertical seeding and bottom seeding propagation of burrowing shellfish includes a culture frame and a culture tray. The length × width × height of the culture frame is 420 × 370 × 320 mm, and the culture tray is a plastic basket with a tray added to the bottom of the plastic basket.

[0042] The breeding frame includes support rod I, support rod II, a rectangular support frame I at the top, and a rectangular support frame II at the bottom. Support frame I and support frame II have the same width, but support frame I is longer than support frame II. The two long sides of support frame I are connected to support frame II by 1 to 3 support rods I, preferably 2 support rods I on each side. The two long sides of support frame I are connected to support frame II by multiple parallel support rods II (closely spaced), with a spacing of 3 to 10 cm between adjacent support rods II. The top of support rod II is arc-shaped, which not only facilitates observation inside the breeding frame but also makes it easier to move the breeding trays. A cross-shaped support frame for supporting the breeding trays is fixed inside support frame II, and support legs are installed at the bottom of support frame II.

[0043] The culture tray is 20cm high and includes a rectangular frame and a support plate at the bottom of the frame. The support plate is slidably connected to the frame. A growth plate is placed inside the frame above the support plate. Powdered sand for shellfish growth is placed between the support plate and the growth plate. The powdered sand is sand that has been sieved and disinfected. The diameter of the water-permeable holes on the side plate, support plate, and tray cover is smaller than the particle size of the sand to prevent sand from leaking out during the culture process and making the culture water turbid.

[0044] Example 6 The following describes the arrangement of broodstock cultivation devices within the culture pond, with the orientation following... Figure 5 Take the top, bottom, left, and right as an example.

[0045] A method for vertical seeding and bottom seeding propagation of burial shellfish using a device for vertical seeding and bottom seeding of burial shellfish includes the following steps: (1) On the outside of the breeding pond (i.e. Figure 5A water injection pipe 30 is laid along the edge of the pool (at the lower end direction). Multiple main water inlets 31 facing inwards from the pool are located on the water injection pipe. Figure 5 An auxiliary water inlet 32 ​​is provided at one end of the pool (at the upper end), and a drain outlet 33 is provided at the other end to discharge aquaculture wastewater.

[0046] (2) Place the culture frame 10 of Example 1 in the culture pond, close to the left and right sides (i.e. Figure 5 The two rows of aquaculture frames on the left and right sides of the two ponds are arranged in a 1×n pattern (n represents the number of aquaculture frames, the specific number of which depends on the size of the aquaculture pond).

[0047] The breeding frames located within the breeding pond consist of 1-5 columns, preferably 3 columns, depending on the size of the breeding pond. Each column is arranged in a 2×n pattern, with a 40cm wide aisle between adjacent columns. The support rod I of the breeding frame faces the aisle.

[0048] Near the auxiliary water inlet, there are also breeding frames arranged in a 1×m pattern (m represents the number of breeding frames, the specific number depends on the size of the breeding pond).

[0049] (3) Place the culture tray of Example 1 into each culture frame and inject disinfected seawater into the culture pond using the water injection pipe.

[0050] (4) Place 2-3 parent clams in each culture frame. The parent clams can be one or more of the following: razor clams, cockles, purple sand clams, large bamboo clams, and comb-shaped clams. Feed the culture frames regularly. During the culture process, weak parent clams may burrow out of the sand; remove them as needed.

[0051] (5) Drain the water every 3 days and clean the bottom of the pool once.

[0052] Using the device and parent shellfish cultivation method of the present invention, parent shellfish of various species including razor clams, cockles, purple stone clams, large bamboo clams, and comb-shaped clams were cultivated. The fertilization rate and hatching rate are shown in Table 1. The fertilization rate was above 80%, and the hatching rate was above 70%.

[0053] Table 1. Fertilization rate (%) and hatching rate (%) of parent oysters fertilization rate 95 92 90 93 83 Hatching rate 90 80 76 77 72 .

[0054] (6) After cultivation is completed, remove the culture tray from the culture frame and place it in the sowing area. Pull out the tray and the scallop seedlings can be implanted on the shallow beach.

[0055] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A device for vertical seeding and bottom seeding propagation of burrowing shellfish, characterized in that: The system includes a breeding frame and a breeding tray. The breeding tray includes side panels, support bars, seedling attachment devices, and connectors. The side panels form a rectangular frame with openings at the top and bottom. Several drainage holes are provided on the side panels. The support bars are arranged parallel to the outer side of the side panels. The seedling attachment devices are supported at the bottom opening of the rectangular frame and connected to the bottom opening via the connectors. The breeding frame includes a three-dimensional frame and a support bar frame. The support bar frame is arranged parallel to the interior of the three-dimensional frame, and the support bars are placed on the support bar frame. The seedling attachment device includes a growth plate, a support plate, and a slot. The slot is located on the inner side of the bottom of the side plate. The growth plate is placed horizontally inside the three-dimensional frame. The growth plate is provided with several water-permeable holes. The support plate is inserted into the slot. The growth plate is parallel to the support plate. The culture tray also includes a reinforcing strip. The reinforcing strip is located below the slot. The support plate includes a first support plate and a second support plate. The first support plate is inserted into the slot on the front side of the growth plate, and the second support plate is inserted into the slot on the rear side of the growth plate.

2. The device for vertical seeding and bottom seeding propagation of burial shellfish according to claim 1, characterized in that: The three-dimensional frame includes an upper frame, a lower frame, side bars, a rear stop bar, and a front stop bar. The outer diameter of the upper frame is larger than the outer diameter of the lower frame. The side bars connect the upper frame and the lower frame from both sides. The front stop bar and the rear stop bar connect the upper frame and the lower frame from the front and rear sides. The shelf is arranged parallel to the upper frame on the side bars.

3. The device for vertical seeding and bottom seeding propagation of burial shellfish according to claim 2, characterized in that: The seedling attacher uses a silk screen and includes a screen body and a screen edge. The screen edge is located along the perimeter of the screen body and is connected to the bottom perimeter of the side plate via the connector.

4. The device for vertical seeding and bottom seeding propagation of burial shellfish according to claim 2, characterized in that: The tray has several micropores, and the bottom of the tray has nanotubes that release nanobubbles upwards from the tray.

5. The apparatus for vertical seeding and bottom seeding propagation of burial shellfish according to any one of claims 3 or 4, characterized in that: The rear derailleur is fixedly connected to the upper and lower frame respectively, the front derailleur is rotatably connected to the lower frame through a pivot structure, and the front derailleur is connected to the upper frame through a locking structure.

6. The device for vertical seeding and bottom seeding propagation of burial shellfish according to claim 5, characterized in that: Depending on the height of the breeding frame, at least three breeding trays are arranged sequentially from top to bottom within the breeding frame. The width of the breeding trays decreases sequentially from top to bottom, and the breeding trays are staggered in position within the breeding frame.

7. The device for vertical seeding and bottom seeding propagation of burial shellfish according to claim 6, characterized in that: The breeding tray also includes a tray cover, which has several water-permeable holes and is placed over the top opening of the breeding tray.

8. A method for vertical seeding and bottom seeding propagation of burrowing shellfish, characterized in that, Includes the following steps: Step 1: Place the culture frame in the culture area and sow the shellfish seedlings in the three-dimensional frame. At this time, the seedlings are in the planktonic stage and are suspended within the three-dimensional frame. Spread the attached culture powder sand at the bottom of the culture tray and insert the culture tray into the three-dimensional frame along the shelf. Place the culture trays in order from small to large, starting from the bottom of the culture frame and working upwards. Step 2: When the shellfish seedlings are shellfish with a fast burrowing speed, use the device for vertical seeding and bottom seeding propagation of burrowing shellfish as described in any one of claims 1-7 to carry out vertical seeding and bottom seeding propagation. When the shellfish seedlings enter the growth state of attaching to the bottom layer, the shellfish seedlings are continuously cultivated, and Step 3 is carried out when the shellfish seedling cultivation enters the sowing period. Step 3: Pull the breeding tray out from the three-dimensional frame and, once it reaches the sowing area, invert the breeding tray directly onto the breeding area so that the seedlings during the sowing period attach to the breeding area. Step 4: When the shellfish larvae are slow-diving shellfish, use the device for vertical seeding and bottom seeding of buried shellfish as described in any one of claims 4-7 to carry out vertical seeding and bottom seeding. When the shellfish larvae enter the growth state of attaching to the bottom layer, release nanobubbles and put food into the culture frame. The shellfish continue to grow on the growth plate. When the shellfish larvae cultivation enters the sowing period, proceed to step 5. Step 5: Once the shellfish have grown to the seeding size, remove the culture tray from the culture frame and transfer it to the seeding location; Step 6: Pull the tray out from the bottom slot at the seeding position, and place the tray cover over the top opening of the culture tray. The shellfish can then enter the seabed of the seeding area by following the tray removal position.

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