Rice field high-position ditch pit soft-shelled turtle breeding and tail water discharging system

Abstract

The utility model relates to a paddy field high-position ditch pit soft-shelled turtle breeding and tail water discharging system which comprises a breeding ditch pit arranged at a relatively high terrain position on one side of a paddy field; a geomembrane impermeable layer is laid in the ditch pit and covers the pit bottom and the side wall of the ditch pit; the impermeable layer at the pit bottom is filled with a backfill soil layer for soft-shelled turtle breeding; at least one first water outlet is formed in the side wall of the breeding ditch pit, and the first water outlet is formed close to the top of the backfill soil layer; the drainage pipeline system comprises a main drainage pipeline and a drainage branch, and the main drainage pipeline is connected to the first drainage port; the rice field area is divided into a plurality of independent irrigation units, and each irrigation unit is correspondingly provided with at least one drainage branch. According to the scheme, soft-shelled turtles can be managed in a centralized mode, and meanwhile tail water of soft-shelled turtle breeding is fully used for providing nutrients for rice fields.

Description

Technical Field

[0001] This utility model relates to the field of turtle farming technology, and in particular to a system for raising turtles in paddy fields in elevated ditches and for discharging tailwater. Background Technology

[0002] The existing "rice-turtle symbiosis" farming method involves directly planting rice and raising turtles in paddy fields. The turtles excrete directly into the paddy fields, providing nutrients for the rice cultivation. The turtle farming and rice growth environments are highly complementary. However, this method of directly raising turtles in paddy fields has the following drawbacks:

[0003] The soft-shelled turtles are scattered in the paddy fields, making them difficult to catch;

[0004] During the rice harvest, the water in the fields needs to be drained. During this stage, the turtles need to be moved separately, which is inconvenient to manage.

[0005] Because the paddy field embankments are low and easily loosened, turtles can escape during heavy rains due to rising water levels or the embankments being washed away. Therefore, it is necessary to install additional turtle-blocking fences, which are complex in structure and layout.

[0006] Therefore, in order to address the above shortcomings, it is necessary to improve the "turtle-rice symbiosis" farming method so that turtles can be managed centrally and the wastewater from turtle farming can be fully utilized to provide nutrients for rice paddies. Summary of the Invention

[0007] To address the aforementioned problems, the purpose of this utility model is to provide a system for raising turtles in elevated ditches in paddy fields and discharging their wastewater, which enables centralized management of turtles while fully utilizing the wastewater from turtle farming to provide nutrients for the paddy fields.

[0008] A high-level trench turtle farming and tailwater discharge system includes:

[0009] The aquaculture trench is set up on a relatively high position on one side of the paddy field. Its cross-section is an inverted trapezoid, and in terms of depth, it is divided into an underground part dug under the ground and an above-ground part piled up on the ground.

[0010] A geomembrane impermeable layer is laid continuously in the trench, covering the bottom and sidewalls of the trench; a backfill soil layer is filled on the impermeable layer at the bottom of the trench for turtle farming.

[0011] The aquaculture trench is provided with at least one first drainage outlet on its side wall, and the first drainage outlet is located near the top of the backfill soil layer.

[0012] The drainage pipeline system includes a main drainage pipeline and drainage branches, wherein the main drainage pipeline is connected to a first drainage outlet;

[0013] The paddy field area is divided into multiple independent irrigation units, and each irrigation unit is equipped with at least one drainage branch. Multiple drainage points are evenly distributed along the axial direction on the drainage branch. The diameter of the main drainage pipe is larger than the diameter of the drainage branch, and multiple drainage branches are connected to the same main drainage pipe.

[0014] As described above, aquaculture ditches are centrally located on the higher ground side of the paddy field to facilitate centralized management and harvesting of soft-shelled turtles. The inverted trapezoidal structure of the ditches enhances slope stability and prevents collapse. The geomembrane impermeable layer ensures the water storage capacity of the ditches, and the backfill soil layer fixes the geomembrane and raises the aquaculture area. After drainage from the first drainage outlet, the soft-shelled turtles can be quickly exposed. The higher ground ditches utilize gravity flow to discharge tailwater. The main drainage pipeline and branch pipelines are designed in a graded manner to evenly introduce eutrophic tailwater into the paddy field irrigation unit, which not only provides nutrients for the rice but also solves the problem of pollution from aquaculture tailwater.

[0015] Preferably, the aquaculture ditch has at least one second drainage outlet on its side wall, the second drainage outlet being located at the upper part of the aquaculture ditch.

[0016] The second drainage outlet is connected to the main drainage pipe. By adding a high-level second drainage outlet, excess water can be discharged first during heavy rain or abnormal rise in water level, preventing overflow of ditches and pits that could cause turtles to escape; at the same time, it can prevent external floodwater from flowing back in and ensure the safety of water level in the breeding area.

[0017] Preferably, the main drainage pipe and the branch drainage pipe are connected in a T-shape. The T-shaped connection simplifies the pipe layout, reduces water flow resistance, improves drainage efficiency, and facilitates pipe maintenance and repair.

[0018] Preferably, a drain valve is installed at the first drain outlet. The opening and closing of the first drain outlet is controlled by the drain valve, allowing for flexible adjustment of the water level in the ditch.

[0019] Preferably, the system includes two main drainage pipes arranged side by side, with both ends of the same drainage branch connected to the two main drainage pipes respectively; the aquaculture ditch has two first drainage outlets on its side wall, and the two main drainage pipes are connected to the two first drainage outlets respectively. The dual main drainage pipe design improves the system's drainage redundancy and avoids drainage failure due to blockage of a single pipe; simultaneous drainage from the two first drainage outlets can accelerate the water level drop, improve drainage efficiency, and improve irrigation efficiency for paddy fields.

[0020] Preferably, each irrigation unit is provided with a corresponding drainage branch, which is set along the planting direction of its corresponding irrigation unit and located on the center line of the irrigation unit. The drainage branch is arranged along the center line of the irrigation unit to ensure that the tailwater is evenly diffused from the center to both sides, avoiding water accumulation or uneven nutrient distribution in local areas of the paddy field, and improving the uniformity of rice growth and fertilizer utilization.

[0021] Preferably, the interval between adjacent drainage points on the drainage branch is 7-8 meters. The layout of drainage points with an interval of 7-8 meters matches the row spacing of rice planting, so that the tailwater infiltration range covers the entire irrigation unit, preventing the concentrated deposition of eutrophic substances that may cause pollution or seedling burn.

[0022] Preferably, the first drainage outlet is 5-15cm above the top of the backfill layer, and the second drainage outlet is 15-25cm above the top of the ditch. The first drainage outlet is limited to a height of 5-15cm to ensure that the water level drops below the backfill layer after drainage, fully exposing the turtles for easy harvesting; the second drainage outlet is set at a height of 15-25cm to reserve sufficient flood control buffer space and prevent backflow of water from outside the paddy field under extreme weather conditions.

[0023] Preferably, the height of the above-ground portion in depth is at least 1.5 times that of the underground portion. This height enhances the overall water storage capacity and structural stability of the trench, while simultaneously raising the ground level of the aquaculture area, effectively utilizing the elevation difference between the aquaculture trench and the paddy field for drainage. Attached Figure Description

[0024] Figure 1 This is a top view of this application;

[0025] Figure 2 for Figure 1 A sectional view;

[0026] Figure 3 The above are actual photographs of the aquaculture ditches used in this application;

[0027] Figure 4 Diagram showing the laying of a geomembrane impermeable layer;

[0028] Figure 5 Photos showing the layout of the main drainage pipes and branch drainage pipes.

[0029] Figure label:

[0030] 1. Aquaculture trench; 11. Geomembrane impermeable layer; 12. First drainage outlet; 13. Second drainage outlet; 14. Drainage valve; 15. Backfill soil layer.

[0031] Main drainage pipe 21, drainage branch pipe 22, drainage point 221,

[0032] Irrigation unit 3. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below.

[0034] like Figure 1-2As shown, this embodiment provides a high-level trench-based turtle farming and wastewater discharge system, including: a farming trench 1, located at a relatively high elevation on one side of a paddy field, with an inverted trapezoidal cross-section, divided into an underground portion excavated below ground and an above-ground portion constructed above ground. In a specific embodiment, the farming trench 1 is as follows... Figure 3 As shown, the excavated soil layer is directly used to construct the above-ground portion. The height of the above-ground portion in depth is at least 1.5 times that of the underground portion. In one specific embodiment, the bottom excavation depth of the aquaculture trench 1 is 0.5m, and the above-ground construction height is 1m, ensuring the overall water storage capacity and structural stability of the trench, guaranteeing sufficient aquaculture depth within the trench, and preventing turtles from escaping. The inverted trapezoidal trench structure enhances slope stability and prevents collapse. In this embodiment, the bottom width of the aquaculture trench 1 is 3.5m, the top width is 4.5m, and the side slope width is 0.8m. These dimensions ensure that the aquaculture trench 1 can provide sufficient water storage capacity and guarantee structural stability.

[0035] Combination Figure 4 A geomembrane impermeable layer 11 is laid continuously within the aquaculture trench 1, covering the bottom and sidewalls of the trench. A backfill soil layer 15 is then constructed on top of the impermeable layer at the bottom of the trench for turtle farming. Because the surface of the geomembrane impermeable layer 11 is smooth, it prevents the turtles from crawling out from the sidewalls. The backfill soil layer 15 fixes the geomembrane and raises the aquaculture area, allowing the turtles to quickly emerge after drainage through the first drainage outlet 12.

[0036] The aquaculture trench 1 has at least one first drainage outlet 12 on its side wall, which is located near the top of the backfill soil layer 15. In this embodiment, the first drainage outlet 12 is located 5-15cm above the backfill soil layer 15, so that after the water in the aquaculture trench 1 is drained through the first drainage outlet 12, the turtles at the bottom can be completely exposed. In a specific embodiment, the first drainage outlet 12 is located 10cm above the backfill soil layer 15.

[0037] The drainage pipeline system includes a main drainage pipe 21 and drainage branch pipes 22. The main drainage pipe 21 is connected to a first drainage outlet 12. The paddy field area is divided into multiple independent irrigation units 3, each irrigation unit 3 corresponding to at least one drainage branch pipe 22. Multiple drainage points 221 are evenly distributed along the axial direction on the drainage branch pipe 22. The diameter of the main drainage pipe 21 is larger than the diameter of the drainage branch pipes 22, and multiple drainage branch pipes 22 are connected to the same main drainage pipe 21. Aquaculture wastewater discharged into the main drainage pipe 21 is discharged into the paddy field through the drainage branch pipes 22, making full use of ammonia nitrogen, nitrite, and other substances in the aquaculture wastewater to provide nutrients to the paddy field. In a preferred embodiment, the main drainage pipe 21 and the drainage branch pipes 22 are connected in a T-shape, such as... Figure 5As shown. In a specific embodiment, a T-shaped connector can be used for connection. The T-shaped connection simplifies the pipe layout, reduces water flow resistance, improves drainage efficiency, and facilitates pipe maintenance and repair.

[0038] A drain valve 14 is installed at the connection between the first drain outlet 12 and the main drainage pipe 21. The opening and closing of the first drain outlet 12 is controlled by the drain valve 14 to irrigate the paddy field as needed and to flexibly adjust the water level in the ditch.

[0039] At least one second drainage outlet 13 is provided on the side wall of the aquaculture ditch 1. The second drainage outlet 13 is located at the upper part of the aquaculture ditch 1 and is connected to the main drainage pipe 21. The second drainage outlet 13 limits the maximum water level in the aquaculture ditch 1. The second drainage outlet 13 also drains water through the main drainage pipe 21, discharging the overflowing water into the paddy field. No drainage valve 14 is required at the second drainage outlet 13. Once the water level in the aquaculture ditch 1 rises above the position of the second drainage outlet 13, the water is directly discharged through the second drainage outlet 13 without manual control of the drainage. In this embodiment, the vertical height of the second drainage outlet 13 from the top of the ditch is 15-25cm, leaving sufficient flood control buffer space. In a specific embodiment, the second drainage outlet 13 is located at a vertical height of 20cm from the top of the aquaculture ditch 1.

[0040] To facilitate rapid drainage, in a preferred embodiment, the length of the aquaculture ditch 1 is 1.5-2m, and two first drainage outlets 12 and two second drainage outlets 13 are provided on the side walls to accelerate drainage efficiency. Correspondingly, this includes two main drainage pipes 21 arranged side-by-side, and a single drainage branch.

[0041] The two ends of 22 are respectively connected to two main drainage pipes 21; the breeding ditch 1 is provided with two first drainage outlets 12 on the side wall, and the two main drainage pipes 21 are respectively connected to the two first drainage outlets 12.

[0042] like Figure 1 As shown in this embodiment, each irrigation unit 3 is provided with a corresponding drainage branch 22. The drainage branch 22 is arranged along the planting direction of its corresponding irrigation unit 3 and is located on the center line of the irrigation unit 3. The interval between adjacent drainage points 221 on the drainage branch 22 is 7-8m.

[0043] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A system for raising soft-shelled turtles in elevated ditches in paddy fields and discharging wastewater, characterized in that, include: The aquaculture trench is set up on a relatively high position on one side of the paddy field. Its cross-section is an inverted trapezoid, and in terms of depth, it is divided into an underground part dug under the ground and an above-ground part piled up on the ground. A geomembrane impermeable layer is laid continuously in the trench, and the geomembrane covers the bottom and sidewalls of the trench; a backfill soil layer is filled on the impermeable layer at the bottom of the trench for turtle farming. The aquaculture trench is provided with at least one first drainage outlet on its side wall, and the first drainage outlet is located near the top of the backfill soil layer. The drainage pipeline system includes a main drainage pipeline and drainage branches, wherein the main drainage pipeline is connected to a first drainage outlet; The paddy field area is divided into multiple independent irrigation units, and each irrigation unit is equipped with at least one drainage branch. Multiple drainage points are evenly distributed along the axial direction on the drainage branch. The diameter of the main drainage pipe is larger than the diameter of the drainage branch, and multiple drainage branches are connected to the same main drainage pipe.

2. The system for raising soft-shelled turtles in elevated ditches in paddy fields and discharging tailwater as described in claim 1, characterized in that, The aquaculture ditch is provided with at least one second drainage outlet on its side wall. The second drainage outlet is located at the upper part of the aquaculture ditch and is connected to the main drainage pipe.

3. The system for raising soft-shelled turtles in elevated ditches in paddy fields and discharging tailwater as described in claim 1, characterized in that, The main drainage pipe and the branch drainage pipe are connected in a T-shape.

4. The system for raising soft-shelled turtles in elevated ditches in paddy fields and discharging tailwater as described in claim 1, characterized in that, A drain valve is installed at the first drain outlet.

5. A system for raising soft-shelled turtles in elevated ditches in paddy fields and discharging tailwater as described in claim 1 or 4, characterized in that, It includes two main drainage pipes arranged side by side, with the two ends of the same drainage branch connected to the two main drainage pipes respectively; the aquaculture ditch is provided with two first drainage outlets on the side wall, and the two main drainage pipes are connected to the two first drainage outlets respectively.

6. The system for raising soft-shelled turtles in elevated ditches in paddy fields and discharging tailwater as described in claim 1, characterized in that, Each irrigation unit is provided with a corresponding drainage branch, which is set along the planting direction of its corresponding irrigation unit and is located on the center line of the irrigation unit.

7. A system for raising soft-shelled turtles in elevated ditches in paddy fields and discharging tailwater as described in claim 1, characterized in that, The interval between adjacent drainage points on the drainage branch is 7-8m.

8. A system for raising soft-shelled turtles in elevated ditches in paddy fields and discharging tailwater as described in claim 2, characterized in that, The first drainage outlet is 5-15cm above the top of the backfill layer, and the second drainage outlet is 15-25cm above the top of the trench.

9. A system for raising soft-shelled turtles in elevated ditches in paddy fields and discharging tailwater as described in claim 1, characterized in that, The height of the above-ground portion in depth is at least 1.5 times that of the underground portion.

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