Device for breeding eels in rice field

Abstract

The invention discloses a device for culturing eels in a rice field, which comprises an annular groove, a plurality of eel nests and a multifunctional box, the annular groove is arranged between a ridge and a small ridge around the rice field, the plurality of eel nests are arranged in the annular groove, and the multifunctional box is arranged on the ridge around the rice field; the multifunctional box conveys needed bait, water and air to the eel nests through the main pipeline; the eel nest comprises a nest body, two S-shaped outlet structures and a nest tube, the nest body is of a flat tubular structure, and cultured eels can freely turn around and turn in the nest body; the two S-shaped outlet structures are connected to the two ends of the nest body respectively, the nest pipe is perpendicular to the nest body, one end of the nest pipe is communicated with the nest body, and the other end of the nest pipe is connected with the main pipeline. The artificial nests are provided for the eels in the modern planting rice field, feeding and management of the bred eels are convenient and not affected by chemical fertilizers and pesticides, mechanical harvesting of rice is not affected, and growth of the eels and yield increase of the rice field are promoted.

Description

Technical Field

[0001] The invention belongs to the technical field of eel breeding, and in particular relates to a device for breeding eels in rice fields. Background Art

[0002] Yellow eel is widely distributed in my country and has the habit of coming out in spring and hibernating in winter. When the water temperature in the habitat drops below 10℃, the yellow eel will hide in the cave to spend the winter. When the water temperature rises above 13℃ in spring and summer, it will leave the cave to look for food. Yellow eel is a carnivorous fish. Its food includes insects and their larvae, small fish and fish eggs, crustaceans such as shrimps, cladocerans and copepods, etc. It will also prey on some tadpoles and young frogs, and even ingest some organic debris and phytoplankton as a food source. Yellow eel mainly relies on its relatively developed sense of smell and touch to hunt. Yellow eel is fierce and aggressive when hunting. It can open its mouth very wide and swallow larger food. Yellow eel has the habit of hiding during the day and coming out at night. During the day, it usually lives in the cave, only exposing its head or mouth and nose to the cave entrance, waiting for the opportunity to hunt. At night, it will actively swim out of the cave to move around and look for food. The eel can breathe air directly with the help of the epidermis of the oral cavity and the inner wall of the throat cavity as an "auxiliary respiratory organ", and can also survive in mud or moist soil. The eel has the ability to find a suitable living environment, and a suitable environment can promote the growth of the eel. Under artificial breeding conditions, it is fed with compound feed and river clam meat, earthworms, maggots, small fish, animal offal, etc.

[0003] The environment of traditional ecological rice fields can meet the growth and development needs of eels. Rice can keep the water quality fresh, and rice fields breed many natural baits for eels. Therefore, there are many eels in rice fields, which are also an important source of wild fishing. Due to the improvement of modern rice planting methods, the environment of rice fields has also changed and is no longer suitable for the growth of eels. For example, the large-scale use of pesticides and fertilizers has reduced the number of wild animals in rice fields, the number of caves has decreased, the soil has become compacted, and the number of eels has become fewer and fewer, or even extinct. When artificially raising eel fry in rice fields, due to their weak ability to dig holes, they are temporarily unable to find caves to live in, which poses a lot of risks and greatly reduces the survival rate. Rice field farming of eels faces severe challenges. The method of directly raising fry in rice fields and rice planting often cannot achieve both, and further improvement is needed. Summary of the invention

[0004] The invention provides a device for breeding eels in rice fields, which can solve the drawbacks of difficulty in digging holes and harmful effects of pesticides and fertilizers in breeding eels in rice fields. The invention provides artificial nests for eels, and the artificial nests can also prevent harm to eels caused by pesticides and fertilizers and field drying, thereby achieving the purpose of improving breeding survival rate.

[0005] To solve the above problems, the technical solution provided by the present invention is as follows:

[0006] The embodiment of the present invention provides a device for breeding eels in a rice field, comprising an annular groove (4), a plurality of eel nests (8) and a multifunctional box (7), wherein the annular groove (4) is arranged between a ridge (2) and a small ridge (3) around a rice field (1), a plurality of eel nests (8) are arranged in the annular groove (4), and the multifunctional box (7) is arranged on the ridge (2) around the rice field (1); the multifunctional box (8) transports required bait, water and air to the plurality of eel nests (8) through a main pipeline (6);

[0007] The eel nest (8) comprises a nest body (8-1), two S-shaped outlet structures (8-2) and a nest tube (8-3); the nest body (8-1) is a flat tubular structure, and the cultured eels can turn freely in the nest body (8-1); the two S-shaped outlet structures (8-2) are respectively connected to the two ends of the nest body (8-1); the S-shaped outlet structure (8-2) is a trumpet-shaped structure, and the S-shaped outlet structure (8-2) comprises a curved neck structure (8-4) and a curved circular tube (8-3) connected to each other. The structure (8-5) is characterized in that the curved neck structure (8-4) is connected to the nest body (8-1); a floating valve (8-7) is arranged at the opening (8-6) of the curved circular tube structure (8-5); the cross-sectional size of the floating valve (8-7) is larger than the cross-sectional size of the hole (5) at the edge of the small ditch (4) around the rice field (1); the nest pipe (8-3) is arranged perpendicular to the nest body (8-1); one end of the nest pipe (8-3) is communicated with the nest body (8-1), and the other end is connected to the main pipe (6).

[0008] In an optional embodiment of the present invention, the nest (8-1) has a thickness of 5 to 10 centimeters and a length of 30 to 80 centimeters.

[0009] In an optional embodiment of the present invention, the curved neck structure (8-4) is a flat structure on the side facing the nest body (8-1).

[0010] According to an optional embodiment of the present invention, the multifunctional box (7) comprises a base (7-1), an air pump (7-2), a discharge hopper (7-3), a discharge valve (7-5), a barometer (7-4), a branch pipeline (7-6) and a pressure regulating valve (7-7); the air pump (7-2) is fixed on the base (7-1), the air pump (7-2), the discharge hopper (7-3) and the barometer (7-4) are all connected to the main pipeline (6), a discharge valve (7-5) is arranged at the bottom of the discharge hopper (7-3), the main pipeline (6) is connected to the branch pipeline (7-6), and a pressure regulating valve (7-7) is arranged on the branch pipeline (7-6).

[0011] In an optional embodiment of the present invention, the barometer comprises the air guide tube (7-41), the gas-liquid box (7-42), the liquid guide tube (7-43), a graduated column (7-44), a pressure regulating bag (7-45) and an air pressure valve (7-46); one end of the air guide tube (7-41) is connected to the upper left portion of the gas-liquid box (7-42), the other end of the air guide tube (7-41) is connected to the main pipeline (6), the air guide tube (7-41) is provided with the air pressure valve (7-46), the liquid guide tube (7-43) is connected to the right bottom portion of the gas-liquid box (7-42), the graduated column (7-44) is provided at the upper portion of the liquid guide tube (7-43), and the pressure regulating bag (7-45) is connected to the top of the graduated column (7-44).

[0012] The main pipeline (6) pressurizes air into the gas-liquid box (7-42) through the air guide tube (7-41), so that the liquid in the gas-liquid box (7-42) is pressed into the scale column (7-44) through the liquid guide tube (7-43) at the bottom thereof; the pressure regulating bag (7-45) connected to the top of the scale column (7-44) is used to release the air pressure above the scale column (7-44); the pressure regulating valve (7-7) is adjusted according to the water depth under the water surface of the rice field (1) where the eel nest is located, so that the horizontal surface in the scale column (7-44) grows to the water depth where the eel nest (8) is located.

[0013] In an optional embodiment of the present invention, the catheter (7-43) is an L-shaped structure.

[0014] Beneficial effects: An embodiment of the present invention provides a device for breeding eels in rice fields, comprising an annular groove, a plurality of eel nests and a multifunctional box, wherein the annular groove is arranged between the ridges and small ridges around the rice field, the plurality of eel nests are arranged in the annular groove, and the multifunctional box is arranged on the ridges around the rice field; the multifunctional box transports required bait, water and air to the plurality of eel nests through a main pipeline; wherein the eel nest comprises a nest body, two S-shaped outlet structures and a nest pipe, the nest body is a flat tubular structure, and the cultured eels can turn around freely in the nest body; the two S-shaped outlet structures are respectively connected to the two ends of the nest body, and the nest pipe is arranged perpendicular to the nest body, one end of which is connected to the nest body, and the other end is connected to the main pipeline; the present invention provides artificial nests for eels in modern rice fields, and the cultured eels are convenient to feed and manage, are not affected by chemical fertilizers and pesticides, do not affect the mechanized harvesting of rice, and promote the growth of eels and increase the yield of rice fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of the structure of a device for breeding eels in rice fields provided in an embodiment of the present application.

[0017] Figure 2 A schematic diagram of the partial structure of a device for breeding eels in rice fields provided in an embodiment of the present application.

[0018] Figure 3 A schematic diagram of the eel nest structure of a device for breeding eels in rice fields provided in an embodiment of the present application.

[0019] Figure 4 A schematic diagram of the nest structure of an eel nest provided in an embodiment of the present application.

[0020] Figure 5 A schematic diagram of the S-shaped outlet structure of an eel nest provided in an embodiment of the present application.

[0021] Figure 6 A schematic diagram of the multifunctional box structure of a device for breeding eels in rice fields provided in an embodiment of the present application.

[0022] Figure 7 A schematic diagram of the barometer structure of a multi-function box provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0024] like Figure 1 to Figure 7 As shown, an embodiment of the present invention provides a device for breeding eels in a rice field, comprising an annular groove 4, a plurality of eel nests 8 and a multifunctional box 7. The annular groove 4 is arranged between the ridge 2 and the small ridge 3 around the rice field 1, the plurality of eel nests 8 are arranged in the annular groove 4, and the multifunctional box 7 is arranged on the ridge 2 around the rice field 1; the multifunctional box 8 transports the required bait, water and air to the plurality of eel nests 8 through the main pipeline 6. In this embodiment, a rice field 1 selected for breeding eels is transformed, and an annular groove 4 is excavated around the rice field 1. The annular groove 4 is about 1 meter wide and 40-50 centimeters deep. There is a small ridge 3 outside the annular groove 4. The small ridge 3 has a narrow plane with a width of 20 centimeters on one side of the annular groove 4 and is on the same plane as the rice field. The small ridge 3 is about 15 centimeters higher than the rice field, which is convenient for people to walk. No rice is planted in the annular groove 4. There is a gap on the small ridge 3, and when the rice field is drained, the feed organisms inside can retreat to the annular groove 4 to survive.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the eel nest 8 includes a nest body 8-1, two S-shaped outlet structures 8-2 and a nest tube 8-3. The nest body 8-1 is a flat tubular structure with a thickness of 5 to 10 cm and a length of 30 to 80 cm. The cultured eels can turn around freely in the nest body 8-1. The two S-shaped outlet structures 8-2 are respectively connected to the two ends of the nest body 8-1, wherein the S-shaped outlet structure 8-2 is a trumpet-shaped structure, and the S-shaped outlet structure 8-2 includes a curved neck structure 8-4 and a curved circular tube structure 8-5 connected to each other. The curved neck structure 8-4 is connected to the nest body 8-1, and the curved neck structure 8-4 is a flat structure facing the nest body 8-1. The curved circular tube structure 8-5 is a circular tube that bends upward, and a floating gate 8-7 is provided at the opening 8-6 of the curved circular tube structure 8-5. The cross-sectional size of the floating gate 8-7 is larger than the cross-sectional size of the hole 5 at the edge of the small ditch 4 around the rice field 1. The depth between the opening 8-6 of the curved circular tube structure 8-5 and the nest body 8-1 is 10-20 cm. When the water level exits the hole, the floating door 8-7 covers the hole 5, which is convenient for fertilizing and spraying pesticides; when the water level submerges the hole 5, the floating door 8-7 is fully opened, and the eels can swim in and out to rest and forage. The nest pipe 8-3 is located at one end of the nest body 8-1, and the nest pipe 8-3 is arranged perpendicular to the nest body 8-1. One end of the nest pipe 8-3 is connected to the nest body, and the other end is connected to the main pipeline 6. Water and air can be transported into the eel nest 8 through the nest pipe 8-3.

[0026] like Figure 6 and Figure 7 As shown, the multifunctional box 7 includes a base 7-1, an air pump 7-2, a feed hopper 7-3, a feed valve 7-5, a barometer 7-4, a branch pipeline 7-6 and a pressure regulating valve 7-7; the air pump 7-2 is fixed on the base 7-1, and the air pump 7-2, the feed hopper 7-3 and the barometer 7-4 are all connected to the main pipeline 6, the bottom of the feed hopper 7-3 is provided with a feed valve 7-5, the main pipeline 6 is connected with a branch pipeline 7-6, and the branch pipeline 7-6 is provided with a pressure regulating valve 7-7. The air pump 7-2 can directly transport air or provide transport power. For the eel nest 8, the material transported inward is not the larger the flow rate, the better, which will drive away the eels in it, so the pressure of the transported material is adjusted by the barometer 7-4. The pressure regulating valve 7-7 is located behind the barometer 7-4, and its function is to adjust the flow rate and air pressure of the main pipeline 6. When delivering gas to the eel nest 8, the pressure regulating valve 7-7 is adjusted so that the gas can just flow out slowly from the eel nest 8.

[0027] The barometer includes an air guide tube 7-41, an air-liquid box 7-42, a liquid guide tube 7-43, a graduated column 7-44, a pressure regulating bag 7-45 and an air pressure valve 7-46; one end of the air guide tube 7-41 is connected to the upper left part of the air-liquid box 7-42, the other end of the air guide tube 7-41 is connected to the main pipeline 6, and an air pressure valve 7-46 is arranged on the air guide tube 7-41. The liquid guide tube 7-43 is connected to the right bottom of the air-liquid box 7-42, the graduated column 7-44 is arranged on the upper part of the liquid guide tube 7-43, and the pressure regulating bag 7-45 is connected to the top of the graduated column 7-44. The liquid guide tube 7-43 is preferably an L-shaped structure.

[0028] The main pipeline 6 pressurizes air into the gas-liquid box 7-42 through the air guide pipe 7-41, so that the liquid in the gas-liquid box 7-42 is pressed into the scale column 7-44 through the liquid guide pipe 7-43 at the bottom thereof. The pressure regulating bag 7-45 connected to the top of the scale column 7-44 functions to release the air pressure above the scale column 7-44; the pressure regulating valve 7-7 is adjusted according to the water depth under the water surface of the rice field 1 where the eel nest is located, so that the horizontal surface in the scale column 7-44 grows to the water depth where the eel nest 8 is located.

[0029] During operation, the pressure regulating valve 7-7 is opened, and then the air pressure valve 7-46 is opened, and the pressure regulating valve 7-7 is slowly reduced, the air pressure in the main pipeline 6 gradually increases, the pressure in the gas-liquid box 7-42 also gradually increases, and the liquid level in the graduated column 7-44 rises. When the rising height reaches the underwater depth of the eel, the adjustment is stopped. At this time, the pressure is just enough to make the gas slowly flow out of the eel nest 8, which plays a ventilation and oxygenation role for the eel nest 8. The operation of conveying liquid is that there is a straight upward pipe at the end of the main pipeline 6, and the pressure regulating valve 7-7 is adjusted until water is discharged from the upper end of the vertical pipe.

[0030] The eel nest 8 is buried under the small ridge 3, and the nest mouth opening of the eel nest 8 is arranged in a narrow plane, and the nest mouth extends in the paddy field, and the nest mouth is level with or slightly lower than the paddy field. The nest pipe 8-3 is located on one side of the annular groove 4. After a plurality of eel nests 8 are buried, each eel nest 8 is connected by the main pipeline 6. It is convenient to pull out when catching eels on one side of the annular groove 4. After the rice seedlings are planted, the water level is controlled at about 10 cm. After the eel fry is put in a free-range position, an attractant is supplied to the eel nest 8 through a multifunctional box 7. The attractant can be made into water by beating liver or fish meal, and the delivery amount is to have a small amount of outflow from the nest mouth, so as to lure the eels into the nest. When feeding artificially, the bait is thrown on both sides of the small ridge 3.

[0031] Example 1

[0032] There are about 3 mu of rice fields, which are suitable for breeding eels. The technical solution of the device for breeding eels in rice fields according to the above embodiment is implemented.

[0033] The rice fields selected for eel breeding are renovated, and circular trenches are excavated around the rice fields. The width of the circular trench is about 1 meter and the depth is 40 centimeters. There is a small ridge outside the circular trench. The small ridge has a narrow plane of 20 centimeters wide on one side of the circular trench, which is on the same plane as the rice field. The small ridge is about 15 centimeters higher than the rice field, which is convenient for people to walk. Rice is not planted in the small ditch. There is a gap on the small ridge. After the seedlings are planted, the water level is controlled at about 10 centimeters. After the eel fry are released, the attractant is supplied to the nest through a multi-functional box. The attractant can be made of liver or fish meal, etc., and the delivery amount is a small amount of outflow from the nest mouth, so as to lure the eels into the nest. When feeding artificially, the bait is thrown on both sides of the small ridge. When the rice field is drained, the feed organisms inside can retreat to the circular trench to survive. After the rice is harvested, the weather temperature is high, and water is returned to the rice fields. The eels are continued to be fed until they stop eating. At this time, the water in the circular ditch is drained and the eels are caught. The yield and survival rate are significantly improved compared with directly releasing the seedlings into the rice fields (P<0.01).

[0034] Example 2

[0035] There are about 5 mu of rice fields, which are suitable for breeding eels. The technical solution of the device for breeding eels in rice fields according to the above embodiment is implemented.

[0036] The rice fields selected for breeding eels are renovated, and circular grooves are excavated around the rice fields. The width of the circular grooves is about 1 meter and the depth is 50 centimeters. There are small ridges on the outside of the circular grooves. The small ridges have a narrow plane of 20 centimeters wide on one side of the circular grooves, which is on the same plane as the rice fields. The small ridges are about 15 centimeters higher than the rice fields, which is convenient for people to walk. Rice is not planted in the circular grooves. There are gaps on the small ridges. When the rice fields are drained, the feed organisms inside can retreat to the circular grooves to survive. After the seedlings are planted, the water level is controlled at about 10 centimeters. After the eel fry are released, attractants are supplied to the nests through a multifunctional box. The attractants can be made of liver or fish meal, etc., and the delivery amount is a small amount of outflow from the nest mouth, so as to lure the eels into the nests. When feeding artificially, the bait is thrown on both sides of the small ridges. After the rice is harvested, the temperature is relatively low. At this time, the water in the circular ditch is drained and the eels are caught. The yield and survival rate are significantly improved compared with directly releasing eels into the rice fields (P<0.01).

[0037] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A device for breeding eels in rice fields, characterized in that: The invention comprises an annular groove (4), a plurality of eel nests (8) and a multifunctional box (7); the annular groove (4) is arranged between a ridge (2) and a small ridge (3) around a rice field (1); a plurality of eel nests (8) are arranged in the annular groove (4); and the multifunctional box (7) is arranged on the ridge (2) around the rice field (1); the multifunctional box (8) transports required bait, water and air to the plurality of eel nests (8) through a main pipeline (6); The eel nest (8) comprises a nest body (8-1), two S-shaped outlet structures (8-2) and a nest tube (8-3); the nest body (8-1) is a flat tubular structure, and the cultured eels can turn freely in the nest body (8-1); the two S-shaped outlet structures (8-2) are respectively connected to the two ends of the nest body (8-1); the S-shaped outlet structure (8-2) is a trumpet-shaped structure, and the S-shaped outlet structure (8-2) comprises a curved neck structure (8-4) and a curved circular tube (8-3) connected to each other. The structure (8-5) is characterized in that the curved neck structure (8-4) is connected to the nest body (8-1); a floating valve (8-7) is arranged at the opening (8-6) of the curved circular tube structure (8-5); the cross-sectional size of the floating valve (8-7) is larger than the cross-sectional size of the hole (5) at the edge of the small ditch (4) around the rice field (1); the nest pipe (8-3) is arranged perpendicular to the nest body (8-1); one end of the nest pipe (8-3) is communicated with the nest body (8-1), and the other end is connected to the main pipe (6).

2. The device for cultivating eels in rice fields according to claim 1, characterized in that: The nest body (8-1) has a thickness of 5 to 10 centimeters and a length of 30 to 80 centimeters.

3. The device for breeding eels in rice fields according to claim 1, characterized in that: The curved neck structure (8-4) is a flat structure on the side facing the nest body (8-1).

4. The device for cultivating eels in rice fields according to claim 1, characterized in that: The multifunctional box (7) comprises a base (7-1), an air pump (7-2), a material discharge hopper (7-3), a material discharge valve (7-5), a barometer (7-4), a branch pipeline (7-6) and a pressure regulating valve (7-7); the air pump (7-2) is fixed on the base (7-1); the air pump (7-2), the material discharge hopper (7-3) and the barometer (7-4) are all connected to the main pipeline (6); a material discharge valve (7-5) is arranged at the bottom of the material discharge hopper (7-3); the main pipeline (6) is connected to the branch pipeline (7-6); and a pressure regulating valve (7-7) is arranged on the branch pipeline (7-6).

5. The device for cultivating eels in rice fields according to claim 4, characterized in that: The barometer comprises an air guide tube (7-41), an air-liquid box (7-42), a liquid guide tube (7-43), a graduated column (7-44), a pressure regulating bag (7-45) and an air pressure valve (7-46); one end of the air guide tube (7-41) is connected to the upper left part of the air-liquid box (7-42), the other end of the air guide tube (7-41) is connected to the main pipeline (6), the air guide tube (7-41) is provided with the air pressure valve (7-46), the liquid guide tube (7-43) is connected to the right bottom of the air-liquid box (7-42), the graduated column (7-44) is provided at the upper part of the liquid guide tube (7-43), and the pressure regulating bag (7-45) is connected to the top of the graduated column (7-44). The main pipeline (6) pressurizes air into the gas-liquid box (7-42) through the air guide tube (7-41), so that the liquid in the gas-liquid box (7-42) is pressed into the scale column (7-44) through the liquid guide tube (7-43) at the bottom thereof; the pressure regulating bag (7-45) connected to the top of the scale column (7-44) is used to release the air pressure above the scale column (7-44); the pressure regulating valve (7-7) is adjusted according to the water depth under the water surface of the rice field (1) where the eel nest is located, so that the horizontal surface in the scale column (7-44) grows to the water depth where the eel nest (8) is located.

6. The device for cultivating eels in rice fields according to claim 5, characterized in that: The liquid guiding tube (7-43) is an L-shaped structure.

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