Rice field for breeding cherax quadricarinatus and ecological breeding method of cherax quadricarinatus

Abstract

The invention discloses a rice field for breeding cherax quadricarinatus and an ecological breeding method thereof, and relates to the technical field of rice field shrimp breeding. A first field ridge and a second field ridge are arranged along the peripheral side of the rice field; shrimp breeding ditches are formed between the first field ridges and the second field ridges, and the first field ridges are located on the inner sides of the second field ridges; a channel penetrating through the two sides is arranged at the bottom of the first field ridge, and a pipe is embedded in the channel; the width of the top surface of the first field ridge is 0.4-0.6 m, and the top surface of the first field ridge is 0.2-0.4 m higher than the field surface; the width of the top surface of the second field ridge is 1.5-2.5 m, and the top surface of the second field ridge is 0.7-1.0 m higher than the field surface; the width of the shrimp breeding ditch is 1.5-2.5 m, and the depth of the shrimp breeding ditch is 0.8-1.2 m; and the shrimp breeding ditch is U-shaped or annular with an opening on one side. According to the method, the first field ridge and the second field ridge are arranged, and the shrimp breeding ditches are arranged between the first field ridge and the second field ridge, so that the problem that the shrimp breeding ditches and field ditches are arranged in the rice field and seriously interfere with a subsequent harvester entering the field to harvest rice is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of shrimp farming in rice fields, and particularly relates to a rice field for red-clawed shrimp farming and an ecological farming method thereof. Background Art

[0002] The red claw crayfish, also known as the Australian freshwater crayfish, belongs to the class Crustacea and is one of the most valuable freshwater economic shrimp species in the world. It is native to the tropical regions of northern Australia. This species has strong adaptability to breeding, high market price, simple breeding technology and good breeding benefits.

[0003] Rice field shrimp farming has set off a farming boom across the country due to its short farming time, flexible farming model, high land utilization rate, fast capital turnover rate and low bait cost. For example, CN1034897A discloses a rice field freshwater farming method for crayfish, CN1078508A discloses a rice field-based lobster farming method, and CN112703983A discloses a rice-shrimp rotation method based on one-season rice. In these existing technical solutions, it is usually necessary to dig a "cross" or "one" shaped field ditch in the middle of the field, and at the same time, a circular shrimp farming ditch is opened around the rice field. The width of the circular shrimp farming ditch and the field ditch is generally greater than 0.5m, and the depth is greater than 0.5m. The existence of these circular shrimp farming ditches and field ditches will cause serious interference to the subsequent harvester entering the field to harvest rice. Summary of the invention

[0004] The object of the present invention is to provide a rice field for red claw crayfish breeding, utilizing the setting of a first ridge and a second ridge, and setting a shrimp breeding ditch between the first ridge and the second ridge, so as to avoid the problem that the shrimp breeding ditch and the field ditch are set inside the rice field, which will cause serious interference to the subsequent harvester entering the field to harvest rice.

[0005] The present invention also aims to provide an ecological breeding method for red-clawed crayfish. When harvesting rice or lobsters, food or drugs for attracting lobsters are placed in the shrimp breeding ditch. When the lobsters basically enter the shrimp breeding ditch, the pipe is blocked and the rice harvesting or lobster harvesting can be carried out; thus preventing the harvester from entering the rice field to harvest and causing damage to the lobsters.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention discloses a rice field for breeding red-clawed crayfish, comprising a rice field, wherein a first ridge and a second ridge are arranged along the periphery of the rice field; a shrimp breeding ditch is opened between the first ridge and the second ridge, and the first ridge is located inside the second ridge; a passage running through both sides is arranged at the bottom of the first ridge, and a pipe is buried in the passage; the top surface width of the first ridge is 0.4-0.6m, and it is 0.2-0.4m higher than the field surface; the top surface width of the second ridge is 1.5-2.5m, and it is 0.7-1.0m higher than the field surface; the width of the shrimp breeding ditch is 1.5-2.5m, and the depth is 0.8-1.2m.

[0008] As a preferred technical solution of the present invention, the shrimp breeding ditch is U-shaped or ring-shaped with an opening on one side.

[0009] As a preferred technical solution of the present invention, the inner side of the first ridge is set as an inclined slope; the inner side of the second ridge is set as an inclined slope.

[0010] As a preferred technical solution of the present invention, a sunshade assembly is arranged in the shrimp farming ditch; the sunshade assembly includes a frame, a plurality of inclined inclined plates are arranged at equal gaps inside the frame, and a mounting rod is connected to the bottom end of the frame.

[0011] As a preferred technical solution of the present invention, the mounting rod includes a drill rod with one end embedded in the soil, the top of the drill rod is connected to a guide rod, a limiting ring A is provided at the end of the guide rod, and a guide hole matching the guide rod is provided on the peripheral side of the frame; the outer side of the limiting ring A is threadedly connected to the locking bolt A.

[0012] As a preferred technical solution of the present invention, the frame and the inclined plate are both made of plastic / foam with a density less than 1g / cm3. When the sunshade assembly is installed inside the shrimp farming ditch, it floats up under the action of its own buoyancy and rests against the bottom side of the limit ring A.

[0013] As a preferred technical solution of the present invention, an end cover is provided at the end of the tube for sealing the tube; the end cover is a porous cover plate, and the porous cover plate is rotatably mounted on the end face of the tube through an axis; the axis is arranged on the end face of the tube; and the porous cover plate is provided with an opening for the axis to pass through; a limiting ring B with a locking bolt B is sleeved on the shaft.

[0014] As a preferred technical solution of the present invention, a juvenile shrimp avoiding device is also provided in the shrimp breeding ditch; the juvenile shrimp avoiding device includes a box body formed by welding six porous plates, a rectangular opening is provided on the porous plate on one side of the box body, and a plurality of baffles A arranged in the vertical direction are provided at equal intervals on the rectangular openings; a support plate is provided on the top of the box body, and the support plate protrudes from the water surface.

[0015] As a preferred technical solution of the present invention, two symmetrically arranged L-shaped flanges are respectively arranged at the top and bottom of the rectangular opening located on the outside of the porous plate, and an adjusting door is arranged between the two L-shaped flanges, and the adjusting door includes a frame, and a plurality of baffle bars B arranged in the frame; the baffle bars B are arranged in the vertical direction, and the distance between two adjacent baffle bars B is L1, and the distance between two adjacent baffle bars A is L2, L1=L2.

[0016] A red-clawed crayfish ecological breeding method comprises the following steps:

[0017] Stp1. Select a rice field with sufficient water source, convenient drainage and irrigation, strong water retention capacity, good ecological environment, no pollution sources around, fertile soil, and natural bottom structure; prepare the rice field according to the above rice field for red claw crayfish farming;

[0018] Stp2, rice sowing in mid-April;

[0019] Stp3. 15 days after the rice is sown, shrimp fry are released into the rice fields. The size of the shrimp fry is 2-4 cm, and the ratio of male to female shrimp fry is 1:1.8. The release density of the shrimp fry is 4000-6000 per mu;

[0020] Stp4. When harvesting rice or lobsters, food or drugs to attract lobsters are placed in the shrimp-breeding ditch. When the lobsters have basically entered the shrimp-breeding ditch, the pipe is blocked and rice harvesting or lobster harvesting can be carried out.

[0021] As a preferred technical solution of the present invention,

[0022] The present invention has the following beneficial effects:

[0023] 1. The present invention utilizes the setting of the first field ridge and the second field ridge, and sets a shrimp-raising ditch between the first field ridge and the second field ridge, so as to avoid the problem that the shrimp-raising ditch and the field ditch are set inside the rice field, which will cause serious interference to the subsequent harvester entering the field to harvest rice.

[0024] 2. A juvenile shrimp avoiding device is also provided in the shrimp breeding ditch of the present invention, which allows smaller lobsters to enter the ditch to avoid being preyed upon by lobsters of larger sizes. At the same time, the clearance formed by the barrier rod B and the barrier rod A is adjusted by adjusting the movement of the regulating door during use, so as to adjust the maximum size of lobsters that can enter the box.

[0025] 3. During rice harvesting or lobster harvesting, after luring the lobsters into the shrimp farming ditch, the lobsters are blocked from swimming back to the rice fields from the shrimp farming ditch, and an end cap is provided at the end of the pipe to seal the pipe.

[0026] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 The rice field layout diagram of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the sunshade assembly of the present invention;

[0030] Figure 3 for Figure 2 A partial enlarged view of point B in the middle;

[0031] Figure 4 for Figure 1 A partial enlarged view of the middle part;

[0032] Figure 5 The structure of the shrimp evasion device of the present invention is shown in FIG. Figure 1 ;

[0033] Figure 6 The structure of the shrimp evasion device of the present invention is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] See also Figure 1As shown, the present invention is a rice field for red-clawed crayfish breeding. During construction, a first ridge 11 and a second ridge 12 are arranged along a periphery of the rice field, and the first ridge 11 is located inside the second ridge 12; a shrimp breeding ditch 13 is dug between the first ridge 11 and the second ridge 12, and a channel 14 is arranged at the bottom of the first ridge 11, which runs through both sides and connects the rice field and the shrimp breeding ditch 13;

[0037] In the above, in order to avoid the collapse of the channel 14 due to the activities of the lobsters during a long breeding process, a pipe 15 can be buried in the channel 14 in the present invention; specifically, the pipe 15 has a diameter of 200 mm.

[0038] Specifically, the shrimp farming ditch 13 is in the shape of a ring with an opening on one side. The opening facilitates agricultural planting equipment such as a harvester or a seeding machine to enter the rice field to perform related operations.

[0039] In the present invention, the top surface widths of the first ridge 11 and the second ridge 12 are 0.5m and 2m respectively, and the depths are 0.5m and 1m respectively; and the inner sides of both are configured as inclined slopes.

[0040] like Figure 2-3 ; Since lobsters prefer shade to sunlight, a sunshade assembly can be provided in the shrimp farming ditch 13 in the present invention; the sunshade assembly includes a frame 2, and a plurality of inclined inclined plates 21 are provided at equal gaps inside the frame 2, and the frame 2 and the inclined plates 21 are both made of foam; at the same time, a mounting rod 22 is connected to the bottom end of the frame 2 and is immersed in the shrimp farming ditch 13 through the mounting rod 22.

[0041] On the basis of the above, in order to facilitate the adjustment of the installation height of the sunshade assembly according to the depth of the shrimp farming ditch 13 and the water depth, the installation rod 22 specifically includes a drill rod 220 with one end embedded in the soil, and the top of the drill rod 220 is connected to a guide rod 221, and a limiting ring A222 is provided at the end of the guide rod 221, and a guide hole matching the guide rod 221 is provided on the peripheral side of the frame 2; the outer side of the limiting ring A222 is threadedly connected to the locking bolt A223; when the sunshade assembly is installed inside the shrimp farming ditch 13, it floats up under the action of its own buoyancy and rests against the bottom side of the limiting ring A222.

[0042] Of course, in the present invention, if Figure 4 In order to lure the lobsters into the shrimp-raising ditch 13 and prevent the lobsters from swimming back to the rice field from the shrimp-raising ditch 13 during rice harvesting or lobster harvesting, an end cap 16 is provided at the end of the tube 15 to seal the tube 15;

[0043] At the same time, in order to facilitate the operation of the end cover 16, the end cover 16 in the present invention is a porous cover plate, and the porous cover plate can be rotatably installed on the end surface of the tube 15 through the shaft 151; the shaft 151 is arranged on the end surface of the tube 15; and the porous cover plate is provided with an opening for the shaft 151 to pass through; a limiting ring B17 provided with a locking bolt B171 is sleeved on the shaft 151; when in use, the end cover 16 is rotated until the convex ring 162 arranged inside it is inserted into the inside of the tube 15, and then the limiting ring B17 is controlled to move along the axial direction of the shaft 151 and lock the locking bolt B171.

[0044] At the same time, during the breeding process of lobsters, individual growth will be different. Larger lobsters will prey on smaller lobsters, resulting in a continuous decrease in the survival rate of lobsters. If the lobsters with large size differences are not reasonably separated and bred; therefore, a juvenile shrimp avoiding device is also provided in the shrimp breeding ditch 13 of the present invention, and the juvenile shrimp avoiding device allows smaller lobsters to enter the interior to avoid being preyed upon by lobsters with larger size differences; specifically, as Figure 5 The juvenile shrimp avoiding device includes a box body 300 formed by welding six porous plates 3. A rectangular opening is opened on the porous plate 3 on one side of the box body 300. A plurality of baffles A32 arranged in the vertical direction are arranged at equal intervals on the rectangular opening; a support plate 33 is arranged on the top of the box body 300, and the support plate 33 protrudes from the water surface.

[0045] It is understandable that in some possible implementations, such as Figure 5-6 Two symmetrically arranged L-shaped flanges 34 are respectively arranged at the top and bottom of the rectangular opening located on the outside of the porous plate 3, and an adjusting door is arranged between the two L-shaped flanges 34. The adjusting door includes a frame 35 and a plurality of baffles B36 arranged in the frame 35; the baffles B36 are arranged in the vertical direction, and the distance between two adjacent baffles B36 is 1.5 cm, and the distance between two adjacent baffles A32 is 1.5 cm. During use, the gap formed by the baffles B36 and the baffles A32 is adjusted by adjusting the movement of the adjusting door to adjust the maximum lobster body size that can enter the box body 300, and a locking bolt is arranged in the middle of the L-shaped flange 34.

[0046] A red-clawed crayfish ecological breeding method comprises the following steps:

[0047] Stp1. Select a rice field with sufficient water source, convenient drainage and irrigation, strong water retention capacity, good ecological environment, no pollution sources around, fertile soil, and natural bottom structure; prepare the rice field according to the above rice field for red claw crayfish farming;

[0048] Stp2, rice sowing in mid-April;

[0049] Stp3. 15 days after the rice is sown, shrimp fry are released into the rice fields. The size of the shrimp fry is 2-4 cm, and the ratio of male to female shrimp fry is 1:1.8. The release density of the shrimp fry is 4000-6000 per mu;

[0050] Stp4. When harvesting rice or lobsters, food or drugs to attract lobsters are placed in the shrimp-raising ditch 13. When the lobsters basically enter the shrimp-raising ditch 13, the pipe 15 is blocked and rice harvesting or lobster harvesting can be carried out.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A rice field for breeding red-clawed crayfish, characterized in that: It comprises a rice field (1), and a first ridge (11) and a second ridge (12) are arranged along the periphery of the rice field; A shrimp-cultivating ditch (13) is provided between the first ridge (11) and the second ridge (12), and the first ridge (11) is located inside the second ridge (12); A channel (14) is provided at the bottom of the first ridge (11) and runs through both sides, and a pipe (15) is buried in the channel (14); The top surface width of the first field ridge (11) is 0.4-0.6m, and the height is 0.2-0.4m above the field surface; The top surface width of the second field ridge (12) is 1.5-2.5m, and the height is 0.7-1.0m above the field surface; The width of the shrimp culture ditch (13) is 1.5-2.5m, and the depth is 0.8-1.2m.

2. The rice field for breeding red claw crayfish according to claim 1, characterized in that: The shrimp culture ditch (13) is in a U-shape or a ring shape with an opening on one side.

3. The rice field for breeding red claw crayfish according to claim 1, characterized in that: The inner side of the first ridge (11) is arranged as an inclined slope; the inner side of the second ridge (12) is arranged as an inclined slope.

4. The rice field for breeding red claw crayfish according to claim 1, characterized in that: A sunshade assembly is arranged in the shrimp farming ditch (13); the sunshade assembly comprises a frame (2), a plurality of inclined sloping plates (21) are arranged at equal gaps inside the frame (2), and a mounting rod (22) is connected to the bottom end of the frame (2).

5. The rice field for breeding red claw crayfish according to claim 4, characterized in that: The mounting rod (22) comprises a drill rod (220) with one end embedded in the soil, the top of the drill rod (220) is connected to a guide rod (221), a limit ring A (222) is provided at the end of the guide rod (221), and a guide hole matching the guide rod (221) is provided on the peripheral side of the frame (2); the outer side of the limit ring A (222) is threadedly connected to a locking bolt A (223).

6. A rice field for breeding red claw crayfish according to claim 4 or 5, characterized in that: The frame (2) and the inclined plate (21) are both made of a material having a density of less than 1 g / cm 3 When the sunshade assembly is installed inside the shrimp farming ditch (13), it floats up under its own buoyancy and abuts against the bottom side of the limiting ring A (222).

7. The rice field for breeding red claw crayfish according to claim 1, characterized in that: An end cap (16) is provided at the end of the tube (15) for sealing the tube (15); the end cap (16) is a porous cover plate, and the porous cover plate is rotatably mounted on the end surface of the tube (15) via a shaft (151); the shaft (151) is provided on the end surface of the tube (15); The porous cover plate is provided with an opening for the shaft (151) to pass through; and the shaft (151) is sleeved with a limiting ring B (17) provided with a locking bolt B (171).

8. The rice field for breeding red claw crayfish according to claim 1, characterized in that: A juvenile shrimp avoiding device is also provided in the shrimp breeding ditch (13); the juvenile shrimp avoiding device comprises a box body (300) formed by welding six porous plates (3); a rectangular opening is provided on the porous plates (3) on one side of the box body (300); a plurality of baffles A (32) arranged in a vertical direction are provided at equal intervals on the rectangular opening; A support plate (33) is provided on the top of the box body (300), and the support plate (33) protrudes from the water surface.

9. The rice field for breeding red claw crayfish according to claim 8, characterized in that: The top and bottom of the rectangular opening located outside the porous plate (3) are respectively provided with two symmetrically arranged L-shaped flanges (34), and an adjustment door is arranged between the two L-shaped flanges (34), and the adjustment door includes a frame (35) and a plurality of blocking rods B (36) arranged in the frame (35); The blocking rods B (36) are arranged in a vertical direction, and the distance between two adjacent blocking rods B (36) is L1, and the distance between two adjacent blocking rods A (32) is L2, wherein L1=L2.

10. A method for ecological breeding of red-clawed crayfish, characterized in that: The steps include: Stp1. Choose rice fields with sufficient water sources, convenient irrigation and drainage, strong water retention capacity, no drought during dry weather, no flooding during floods, good ecological environment, no pollution sources around, fertile soil, and natural bottom structure; Preparing a rice field for redclaw aquaculture according to any one of claims 1 to 9; Stp2, rice sowing in mid-April; Stp3. 15 days after the rice is sown, shrimp fry are released into the rice fields. The size of the shrimp fry is 2-4 cm, and the ratio of male to female shrimp fry is 1:1.

8. The release density of the shrimp fry is 4000-6000 per mu; Stp4. When harvesting rice or lobsters, food or drugs to attract lobsters are placed in the shrimp-raising ditch (13). When the lobsters basically enter the shrimp-raising ditch (13), the pipe (15) is blocked and rice harvesting or lobster harvesting can be carried out.

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