An ecological breeding field for breeding Australian lobster in rice field

Abstract

The utility model discloses an ecological breeding field for rice field breeding of Australian lobster, shrimp rice symbiotic technical field, include: field ridge, enclose the rice field of water storage capacity, breeding ditch, along the field ridge inner ring is set up, and in the rice field central longitudinal distribution, prevent the board that escapes, be located on the field ridge and the plastic board of enclosure rice field, the plastic board top end is equipped with the bending of inwards, aeration pipe, lay in the breeding ditch, water level adjusting mechanism, be located in the field ridge outside with the breeding ditch intercommunication, water inlet pipe, through the field ridge with the breeding ditch intercommunication. The utility model discloses an ecological breeding field for rice field breeding of Australian lobster is laid aeration pipe in the breeding ditch, and adopts the detection of oxygen dissolving value of polarograph, when the oxygen dissolving value is low, uses the air pump to increase the oxygen dissolving value in the breeding ditch through aeration pipe, thereby in the oxygen dissolving dimension promotion Australian lobster's breeding density and survival rate.

Description

Technical Field

[0001] This utility model belongs to the field of rice-crayfish co-culture technology, specifically relating to an ecological aquaculture field for raising Australian lobsters in rice paddies. Background Technology

[0002] Rice-shrimp co-cultivation, as an ecological circular agriculture model, achieves synergistic production of rice cultivation and aquaculture by excavating circular aquaculture ditches within rice paddies and installing escape-prevention facilities (i.e., "dual use of water, double harvest from one field"). This model has been successfully implemented in Australian freshwater crayfish (commonly known as redclaw crayfish) farming, demonstrating both ecological and economic benefits. Stocking density is a key indicator affecting the economic benefits of rice-shrimp co-cultivation; however, current technologies face significant bottlenecks. Dissolved oxygen limitation: The dissolved oxygen content in the aquaculture ditch fluctuates drastically (daily average variation > 3 mg / L), and the dissolved oxygen at the bottom of the pond is often lower than the survival threshold of redclaw crayfish (< 4 mg / L) during high-temperature periods. Survival rate constraints: Low dissolved oxygen levels lead to a mortality rate of over 35% during the molting period, forcing the stocking density to be limited to a low level of ≤3000 fish / acre; The above factors result in a much lower crayfish yield per acre compared to pond farming.

[0003] The existing shrimp-rice co-cultivation fields lack oxygen supplementation measures, making it difficult to increase the yield per acre of the shrimp-rice co-cultivation model. Utility Model Content

[0004] In order to overcome the problems existing in the background technology, this utility model provides an ecological farming field for raising Australian lobsters in rice paddies.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an ecological aquaculture field for rice-fish farming of Australian lobsters, comprising: The paddy fields are enclosed by ridges to create water-retaining paddy fields; The aquaculture ditches are constructed along the inner circle of the paddy field ridges and are distributed longitudinally and laterally in the center of the paddy field; An escape-proof board is installed on the paddy field ridge and encloses the paddy field. The escape-proof board is made of plastic and has an inward bend at the top. Aeration pipes are laid within the aquaculture ditch; A water level regulating mechanism is located outside the field ridge and connected to the aquaculture ditch; The water inlet pipe passes through the field ridge and connects to the aquaculture ditch.

[0006] Preferably, the cross-section of the aquaculture ditch is an isosceles trapezoid with a top width of 1.5 to 2 m and a depth of 0.8 to 1.2 m, and the sidewalls of the aquaculture ditch are slopes of 15-30°.

[0007] Preferably, the escape prevention plate is 130-40cm higher than the field ridge.

[0008] Preferably, the water inlet pipe is equipped with an 80-mesh dense mesh.

[0009] Preferably, the water level regulating mechanism includes a deep ditch located on the other side of one of the field ridges, a U-shaped pipe connecting the bottom of the deep ditch and the bottom of the aquaculture ditch, and a telescopic water outlet pipe vertically located in the deep ditch and connected to the U-shaped pipe, wherein the depth of the deep ditch is greater than the depth of the aquaculture ditch.

[0010] Preferably, the telescopic water outlet pipe includes: a corrugated pipe, a first support plate disposed at the lower end of the corrugated pipe, a second support plate disposed at the upper end of the corrugated pipe, and support rods connecting the first support plate and the second support plate; the support rods are four rods surrounding the corrugated pipe, the support rods are fixedly connected to the first support plate, and the support rods pass through the first support plate and insert into the bottom of the deep ditch; the second support plate is slidably connected to the support rods with damping; the height of the corrugated pipe can be compressed to below the bottom of the aquaculture ditch.

[0011] Preferably, the water inlet end of the U-shaped pipe is provided with a first spherical filter cover, and the upper end of the corrugated pipe is provided with a second spherical filter cover.

[0012] Preferably, the main body of the aeration pipe is a network composed of HDPE pipes, the network having one air inlet pipe and the other ends being closed; microporous aeration heads are evenly distributed on the network, and each microporous aeration head is equipped with a dense mesh cover.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention relates to an ecological farming field for raising Australian lobsters in rice paddies. Aeration pipes are laid in the farming ditches, and a polarographic instrument is used to detect dissolved oxygen levels. When the dissolved oxygen level is low, an air pump is used to increase the dissolved oxygen level in the farming ditches through the aeration pipes, thereby improving the farming density and survival rate of Australian lobsters in terms of dissolved oxygen. Attached Figure Description

[0014] Figure 1 A schematic diagram of the structure of an ecological aquaculture field for raising Australian lobsters in rice paddies; Figure 2 A top-down structural diagram of an ecological aquaculture field for raising Australian lobsters in rice paddies; Figure 3 A cross-sectional schematic diagram of an ecological farming field for raising Australian lobsters in rice paddies; Figure 4 This is a schematic diagram of the telescopic water outlet pipe.

[0015] In the figure: ridge 1, paddy field 2, aquaculture ditch 3, anti-escape board 4, aeration pipe 5, water level adjustment mechanism 6, water inlet pipe 7, deep ditch 8, U-shaped pipe 9, corrugated pipe 10, first support plate 11, second support plate 12, support rod 13, first spherical filter cover 14, second spherical filter cover 15, air inlet pipe 16, microporous aeration head 17, dense mesh cover 18. Detailed implementation manners

[0016] In order to make the purpose, technical solutions and beneficial effects of the present utility model clearer, the preferred embodiments of the present utility model will be described in detail below to facilitate understanding by those skilled in the art.

[0017] Please refer to Figures 1 to 4 , this embodiment provides an ecological aquaculture field for cultivating Australian lobsters in paddy fields, including: A ridge 1, enclosing a water-retaining paddy field 2; An aquaculture ditch 3, opened along the inner circle of the ridge 1 and vertically and horizontally distributed in the center of the paddy field 2; in this embodiment, the aquaculture ditch 3 adopts a "rich" character structure layout; An anti-escape board 4, a plastic board provided on the ridge 1 and surrounding the paddy field 2, with an inward bend at the top of the plastic board; used to prevent Australian lobsters from escaping from the paddy field 2, and the Australian lobsters selected are Australian freshwater lobsters, that is, Cherax quadricarinatus; An aeration pipe 5, laid in the aquaculture ditch 3; in this embodiment, it adapts to the "rich" character structure layout of the aquaculture ditch 3, but is not laid in the aquaculture ditch 3 within the inner circle of the ridge 1; A water level adjustment mechanism 6, provided outside the ridge 1 and communicating with the aquaculture ditch 3, used to adapt to aquaculture techniques, as follows: ① Juvenile shrimp stage: water level 40 - 50 cm (±5 cm), facilitating the feeding of juvenile shrimp; ② Sub-adult shrimp stage: water level 60 - 70 cm (±10 cm), expanding the activity space and promoting molting; ③ Adult shrimp stage: water level 80 - 100 cm (±15 cm), providing a low-temperature refuge layer for fattening and weight gain; ④ Before field drying: water depth in the ditch 60 - 70 cm (±10 cm), coping with the water cut-off of the paddy field 2; ⑤ Before heavy rain: drain water in advance to 20 cm (±5 cm) to prevent escape and disease.

[0018] A water inlet pipe 7, passing through the ridge 1 and communicating with the aquaculture ditch 3, and the water inlet pipe 7 can be connected to water conservancy facilities, and valves or plugs can be set to open or close.

[0019] Preferably, the cross-section of the aquaculture ditch 3 is an isosceles trapezoid, with a top width of 1.5 - 2 m and a depth of 0.8 - 1.2 m, and the side wall of the aquaculture ditch 3 is a slope of 15 - 30°, and the slope facilitates the lobsters to climb onto the paddy field 2 to feed.

[0020] The escape prevention board 4 is 130 - 40 cm higher than the ridge 1, and the surface of the escape prevention board 4 is smooth.

[0021] The water inlet pipe 7 is provided with a 80 - mesh fine net to prevent lobsters from escaping through the water inlet pipe 7.

[0022] The water level adjustment mechanism 6 includes a deep ditch 8 on the other side of one of the ridges 1, a U - shaped pipe 9 connecting the bottom of the deep ditch 8 and the bottom of the breeding ditch 3, a telescopic water outlet pipe vertically located in the deep ditch 8 and connecting the U - shaped pipe 9. The depth of the deep ditch 8 is higher than the depth of the breeding ditch 3. The principle of communicating vessels is used to adjust the water level of the breeding ditch 3. The deep ditch 8 can store water, and at the same time, drainage facilities should be set up, such as regularly pumping water into a water cellar, and siphon drainage can be used if conditions permit.

[0023] The telescopic water outlet pipe includes: a corrugated pipe 10, a first support plate 11 provided at the lower end of the corrugated pipe 10, a second support plate 12 provided at the upper end of the corrugated pipe 10, and a support rod 13 connecting the first support plate 11 and the second support plate 12; there are four support rods 13 surrounding the corrugated pipe 10. The support rods 13 are fixedly connected to the first support plate 11, and the support rods 13 pass through the first support plate 11 and are inserted into the bottom of the deep ditch 8; the second support plate 12 is slidably connected to the support rods 13 with damping; the height of the corrugated pipe 10 can be compressed below the bottom of the breeding ditch 3. The support rods 13 are inserted into the soil to keep the telescopic water outlet pipe vertical, and the second support plate 12 slides to compress or stretch the corrugated pipe 10, thereby adjusting the height of the water outlet end of the U - shaped pipe 9, and thus adjusting the water level of the breeding ditch 3.

[0024] The water inlet end of the U - shaped pipe 9 is provided with a first spherical filter cover 14, and the upper end of the corrugated pipe 10 is provided with a second spherical filter cover 15. The first spherical filter cover 14 and the second spherical filter cover 15 are hollow spheres, and the surface of the sphere is provided with water - filtering holes to prevent the U - shaped pipe 9 from being blocked.

[0025] The main body of the aeration pipe 5 is a pipe network composed of HDPE pipes. The pipe network has an air inlet pipe 16, and the rest of the endpoints are in a closed state; micro - pore aeration heads 17 are evenly distributed on the pipe network, and a fine net cover 18 is provided on the micro - pore aeration heads 17. The HDPE pipes are connected into a "rich" - shaped layout using four - way pipes. The layout spacing of adjacent micro - pore aeration heads 17 is set according to the number of cultured tails. The layout in this embodiment is as follows: Stocking density (tails / acre) Aeration head spacing Number of aeration heads / 100-meter trench 3000-4000 1.8m 56 4000-5000 1.5m 67 >5000 1.2m 84 The fine net cover 18 is a stainless - steel cover with a pore diameter of 0.8 - 1.2 mm and an opening rate greater than 45% to block sludge particles and prevent the micro - pore aeration heads 17 from being blocked.

[0026] The air inlet pipe 16 is connected to an air pump for aeration. A portable air pump can be selected, such as a high-flow electric air pump, for example: Wofeng BP1, 12V steel vehicle air pump (equipped with vehicle power supply).

[0027] Aquaculture personnel used a polarograph to collect dissolved oxygen levels at multiple locations. The collection points are listed below: Feeding area: 10cm above the silt, take the average value in 3 consecutive measurements, and collect samples evenly; Dead corner of ditch: 20cm from the side wall, take the reading after standing for 2 minutes; Downstream of the inlet: two points, middle layer and bottom layer, each measured for 2 minutes.

[0028] When the stocking density increases, the feeder needs to increase the amount of food given.

[0029] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. An ecological aquaculture field for raising Australian lobsters in rice paddies, characterized in that, include: A paddy field ridge (1) encloses a paddy field (2) that can store water; an aquaculture ditch (3) is opened along the inner circle of the paddy field ridge (1) and is distributed longitudinally and laterally in the center of the paddy field (2); an escape prevention board (4) is set on the paddy field ridge (1) and encloses the paddy field (2), the escape prevention board (4) is a plastic board, and the top of the plastic board has an inward bend; an aeration pipe (5) is laid in the aquaculture ditch (3); a water level regulating mechanism (6) is set outside the paddy field ridge (1) and connected to the aquaculture ditch (3); and an inlet pipe (7) passes through the paddy field ridge (1) and connects to the aquaculture ditch (3).

2. The ecological aquaculture field for rice-fish farming of Australian lobsters according to claim 1, characterized in that, The cross-section of the aquaculture ditch (3) is an isosceles trapezoid with a top width of 1.5-2m and a depth of 0.8-1.2m. The sidewalls of the aquaculture ditch (3) are slopes of 15-30°.

3. The ecological aquaculture field for rice-fish farming of Australian lobsters according to claim 1, characterized in that, The escape prevention board (4) is 30-40cm higher than the field ridge (1).

4. The ecological aquaculture field for rice-fish farming of Australian lobsters according to claim 1, characterized in that, The water inlet pipe (7) is equipped with an 80-mesh dense mesh.

5. The ecological aquaculture field for rice-fish farming of Australian lobsters according to claim 1, characterized in that, The water level regulating mechanism (6) includes a deep ditch (8) located on the other side of one of the field ridges (1), a U-shaped pipe (9) connecting the bottom of the deep ditch (8) and the bottom of the aquaculture ditch (3), and a telescopic water outlet pipe vertically located in the deep ditch (8) and connected to the U-shaped pipe (9). The depth of the deep ditch (8) is higher than the depth of the aquaculture ditch (3).

6. The ecological aquaculture field for rice-fish farming of Australian lobsters according to claim 5, characterized in that, The telescopic water outlet pipe includes: a corrugated pipe (10), a first support plate (11) located at the lower end of the corrugated pipe (10), a second support plate (12) located at the upper end of the corrugated pipe (10), and a support rod (13) connecting the first support plate (11) and the second support plate (12); the support rod (13) consists of four rods surrounding the corrugated pipe (10), the support rod (13) is fixedly connected to the first support plate (11), and the support rod (13) passes through the first support plate (11) and is inserted into the bottom of the deep ditch (8); the second support plate (12) is slidably connected to the support rod (13) with damping; the height of the corrugated pipe (10) can be compressed to below the bottom of the aquaculture ditch (3).

7. The ecological aquaculture field for rice-fish farming of Australian lobsters according to claim 6, characterized in that, The U-shaped pipe (9) is provided with a first spherical filter cover (14) at the water inlet end, and the corrugated pipe (10) is provided with a second spherical filter cover (15) at the upper end.

8. The ecological aquaculture field for rice-fish farming of Australian lobsters according to claim 1, characterized in that, The main body of the aeration pipe (5) is a network composed of HDPE pipes. The network has an air inlet pipe (16) and the other ends are closed. Microporous aeration heads (17) are evenly distributed on the network, and a dense mesh cover (18) is provided on the microporous aeration head (17).

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