Efficient three-dimensional planting and breeding method for rice, frogs and loaches

Abstract

The invention provides an efficient three-dimensional planting and breeding method for rice, frogs and loaches, and relates to the field of aquaculture in rice fields. The rice frogs are bred in the mode of breeding field construction, ditching, escape prevention equipment construction, screening, sterilization, water purification, bird repelling device arrangement, froglet and loach fry placement, fixed-point quantitative feeding and intelligent temperature measurement and intelligent water level height measurement as assistance, and the breeding speed of the rice frogs is increased in a green, intelligent and efficient mode. A water level detection sensor and a water temperature sensor are placed in the rice field, intelligent temperature control and water level observation in advance can be achieved, after frogs in the current batch are caught, water in the field needs to be treated, the treatment mode is anaerobic and aerobic combination, the principle is that organic pollutants in wastewater are removed through microbial decomposition, then the PH value of the water is neutralized, and the water quality is improved. In this way, efficient breeding of the field frogs is completed.

Description

Technical Field

[0001] The invention relates to the field of rice field aquaculture, and in particular to a high-efficiency three-dimensional rice frog and loach breeding method. Background Art

[0002] The bullfrog is named for its loud call, which is loud and sounds like a bullfrog. The bullfrog is the natural enemy of amphibians. It is native to several states in the eastern United States and was later introduced to western states and other countries. The bullfrog is green or brown, with a white to light yellow abdomen and black stripes on its limbs. The body shape is the same as that of ordinary frogs, but the individual is larger. The female frog is up to 20 cm long, and the male frog is 18 cm. The largest individual can reach more than 2 kg. The head is wide and flat. The mouth is terminal, with a pointed round snout and a blunt face. The eyeball protrudes outward and is divided into upper and lower parts. There is a foldable nictitating membrane on the lower eyelid that can close the eye. The back is slightly rough with fine skin ridges, the limbs are thick, the forelimbs are short and without webs, and the male individual has a clear gray tumor-like protrusion on the inner side of the first toe. The hind limbs are relatively long and large, with webs between the toes. The skin color varies with the living environment. Usually the back and limbs are green-brown, with dark brown spots on the back; the head and mouth edge are bright green; the belly is white; the color below the throat varies with the sex, females are mostly white, gray or dark gray, and males are golden yellow. Bullfrogs have the advantages of fast growth, delicious taste, rich nutrition, and high protein content, making them a precious food. They can also be exported to earn foreign exchange. Their skin can also be used to make leather, and their organs can be used to make medicine. Bullfrogs grow fast, have tender meat, and taste delicious. They are high-quality nutritious foods with low fat and high protein. Frog skin can be used to make high-quality leather, and its turf is thin, soft, and tough, which is the material for making high-quality wallets, belts, ties, leather shoes, musical instruments, and surgical lines. Frog viscera can be used for medicinal purposes, and frog oil can be used to make high-quality lubricants. Therefore, more and more bullfrog farmers are breeding in China.

[0003] CN109169497A The present invention relates to a high-efficiency three-dimensional breeding method for rice frogs and loaches, comprising the following steps: (1) selecting a breeding site; (2) building a breeding pond; (3) disinfecting the breeding pond; (4) storing water; (5) placing bait and breeding; and (6) placing and breeding young frogs.

[0004] The method of the above patent involves building a breeding pond and using the breeding pond to breed rice frogs. However, this breeding method is inefficient and is not conducive to the rapid reproduction of rice frogs. Secondly, it is also impossible to breed other types of aquatic products, which slows down the economic benefits of breeders. At the same time, there are few methods for breeding rice frogs and loaches that have been publicly reported in China, so there is a need to improve this type of breeding method. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides an efficient three-dimensional breeding method for rice frogs and loaches, which includes: building a breeding ground, digging ditches, building escape prevention equipment, screening, sterilization, water purification, arranging bird-repellent devices, placing young frogs and loaches, and feeding at fixed points and in fixed quantities, thereby improving the reproduction rate of rice frogs in a green, intelligent and efficient way.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for efficient three-dimensional cultivation of rice frogs and loaches, the cultivation steps comprising: construction of breeding grounds, trenching, construction of escape prevention equipment, screening, sterilization, water purification, arrangement of bird repellent devices, placement of young frogs and loaches, and feeding at fixed points and quantities, the specific method comprising the following steps:

[0009] Sp1. Choose a fertile rice field for breeding. The rice field must meet the premise of sufficient water source, convenient drainage and irrigation, and unpolluted water quality. The edge of the rice field is surrounded by bamboo fences. An opening that can be opened and closed is opened on the edge of the field surrounded by the bamboo fence, and the ridge is left out. A small door that can be opened is left. The opened opening is covered with a screen. The rice field is divided into four parts and all are surrounded by the screen. Two parts are used for young frog breeding and two parts are used for loach breeding. After the rice field is divided, the ridge surface left out by the screen is used to lay the material table;

[0010] Sp2. Construction of frog ditch: dig a rectangular frog ditch with a width of 0.8m and a depth of 1.0m along the inner side of the ridge, and dig frog sluices in the field. The number and size of frog sluices can be reasonably adjusted according to the density of frog species, and the excavated mud is used to widen, reinforce and raise the ridge. In the loach breeding area, each field is divided into three equal parts. The ridge can be used or the wire mesh can be used. After the division, filter holes should be opened. The loaches can be divided into three types: large, medium and small. The filter holes are used for water flow;

[0011] Sp3. Anti-escape equipment construction requires the preparation of a screen made of nylon or iron wire. The screen should be buried 30 cm in the field ridge, with the ground part above 1 m. It should be fixed with bamboo poles or wooden sticks every 1.5 m. The bottom of the screen should be compacted with stones. In order to prevent frogs from jumping out, the top can be covered, but it should be kept breathable.

[0012] Sp4, water level detection sensors, water quality sensors and water temperature sensors are placed in the rice fields. The transmission method is wireless transmission. The farmers can receive the corresponding information on their mobile phones. When the water temperature in the rice fields exceeds 30°C, chlorine-containing preparations are added for sterilization. When the water quality is not good, the water in the rice fields needs to be replaced;

[0013] Sp5. A bird repellent is inserted on the ridge of the rice field. The power supply of the bird repellent is solar power, the sound intensity is 90dB, and a red floating cloth connected by a bamboo pole is inserted on the ridge;

[0014] Sp6. When placing young frogs, it is necessary to screen the frog species. The selection criteria are strong adaptability, strong activity and health. Before placing them, they need to be soaked and disinfected with salt water or potassium permanganate. The number of frog species placed in each field is uniform.

[0015] Sp7. When placing loach seedlings, you can choose green loach. In the breeding area of ​​green loach, the soil should be sedimentary soil, the color of the soil should be black or brown, and the pH value of the soil should be between 6.5-8.5. Aquatic plants can be placed in the field during the breeding period;

[0016] Sp8. When feeding, a metering pump can be used to pump a fixed amount of feed within a specific time.

[0017] Preferably, the screen in Sp1 is 1 meter higher than the bottom of the field, and the water level in the field is 20 cm, and the area of ​​each divided rice field is the same.

[0018] Preferably, the frog pond in Sp2 is rectangular in shape, the ridges around the frog pond should be thickened and reinforced, and the area for raising loaches is sheltered from the wind and facing the sun with sufficient water resources.

[0019] Preferably, the water level detection device in the Sp4 has a sensitive response time of 1S, the external material is stainless steel, the internal material is polyurethane, the model is DATA-5101, and the model of the water temperature sensor in the Sp4 is 210-101W.

[0020] Preferably, the Sp8 can be used for feeding with edible meat, animal liver, captured flies and maggots, plant feed such as cooked potatoes, sweet potatoes, rice bran, peanut meal, mealworms, maggots and other live animals, small fish, loaches and other large-particle foods, insects, small fish and shrimps, snails, and the feeding amount is calculated according to 4% of the body weight of each young frog in the pond three days before the young frogs enter the pond. After three days, the required feeding amount is calculated based on the standard of eating the whole frog within four hours after feeding. The amount of feed during the high-temperature feeding period accounts for 5% of the body weight. At night, insect attractants are inserted into the ridges to lure flying insects, allowing frogs to prey and indirectly increase vitality. Plant feed can be used for feeding loaches. If animal feed is used, earthworms can be used.

[0021] Preferably, the accumulated water in the Sp4 rice field used for breeding is discharged when the frogs are collected and pre-treated. The pre-treatment method adopts anaerobic and aerobic methods. Non-toxic bleaching powder is added to the treated water to ensure the clarity of the water. The area where loaches are cultured is inspected three times a day. If the loaches swim slowly, boosting equipment should be used to supply oxygen to the water in the field. The number of inspections needs to be increased in summer.

[0022] (III) Beneficial effects

[0023] The present invention provides a high-efficiency three-dimensional breeding method for rice frogs and loaches, which has the following beneficial effects:

[0024] The invention adopts the methods of breeding land construction, ditching, construction of escape prevention equipment, screening, sterilization, water purification, bird repellent device arrangement, placement of young frogs and loach seedlings, fixed-point quantitative feeding, intelligent temperature measurement and intelligent water level measurement as auxiliary methods to cultivate rice frogs, and improves the reproduction speed of rice frogs in a green, intelligent and efficient way. At the same time, insect attracting lamps can be placed on the ridges at night, the insect attracting lamps are 10W, and the light color of the insect attracting lamps is fluorescent. Rice frogs are afraid of direct sunlight, but tend to be in the dim light. The fluorescent insect attracting lamps are used to attract mosquitoes and provide vision for rice frogs. The activity of rice frogs can be improved by free capture and the feeding amount at night can be saved. Water level detection sensors and water temperature sensors are placed in the rice fields to realize intelligent temperature control and advance observation of water levels. After the current batch of frogs are captured, the water in the field needs to be treated by combining anaerobic and aerobic treatment. The principle is to remove organic pollutants in wastewater by microbial decomposition and then neutralize the pH value of water, so that efficient breeding of field frogs is completed.

[0025] In the present invention, sedimentary soil is used in the loach breeding area, which has fine texture, is rich in organic matter, has good drainage, and has a soil pH value between 6.5 and 8.5, so as to provide a good growth environment for loaches. The field plots for breeding loaches in SP2 are divided into large, medium and small areas, so as to breed loaches of different sizes. The bird repeller installed in SP5 can prevent birds from taking away young frogs and loach seedlings. When placing loach seedlings in SP7, black loach is selected, and black loach is the easiest to breed, and can be bred even in fields with insufficient precipitation. DETAILED DESCRIPTION

[0026] The following will be combined with 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 making creative work are within the scope of protection of the present invention.

[0027] Embodiment 1:

[0028] A rice frog loach efficient three-dimensional breeding method, the breeding steps include: breeding ground construction, trenching, construction of escape prevention equipment, screening, sterilization, water purification, bird repellent device arrangement, placement of young frog loach seedlings, fixed-point quantitative feeding, the specific method includes the following steps:

[0029] Sp1. Choose a fertile rice field for breeding. The rice field must meet the premise of sufficient water source, convenient drainage and irrigation, and unpolluted water quality. The edge of the rice field is surrounded by bamboo fences. An opening that can be opened and closed is opened on the edge of the field surrounded by the bamboo fence, and the ridge is left out. A small door that can be opened is left. The opened opening is covered with a screen. The rice field is divided into four parts and all are surrounded by the screen. Two parts are used for young frog breeding and two parts are used for loach breeding. After the rice field is divided, the ridge surface left out by the screen is used to lay the material table;

[0030] Sp2. Construction of frog ditch: dig a rectangular frog ditch with a width of 0.8m and a depth of 1.0m along the inner side of the ridge, and dig frog sluices in the field. The number and size of frog sluices can be reasonably adjusted according to the density of frog species, and the excavated mud is used to widen, reinforce and raise the ridge. In the loach breeding area, each field is divided into three equal parts. The ridge can be used or the wire mesh can be used. After the division, filter holes should be opened. The loaches can be divided into three types: large, medium and small. The filter holes are used for water flow;

[0031] Sp3. Anti-escape equipment construction requires the preparation of a screen made of nylon or iron wire. The screen should be buried 30 cm in the field ridge, with the ground part above 1 m. It should be fixed with bamboo poles or wooden sticks every 1.5 m. The bottom of the screen should be compacted with stones. In order to prevent frogs from jumping out, the top can be covered, but it should be kept breathable.

[0032] Sp4, water level detection sensors, water quality sensors and water temperature sensors are placed in the rice fields. The transmission method is wireless transmission. The farmers can receive the corresponding information on their mobile phones. When the water temperature in the rice fields exceeds 30°C, chlorine-containing preparations are added for sterilization. When the water quality is not good, the water in the rice fields needs to be replaced;

[0033] Sp5. A bird repellent is inserted on the ridge of the rice field. The power supply of the bird repellent is solar power, the sound intensity is 90dB, and a red floating cloth connected by a bamboo pole is inserted on the ridge;

[0034] Sp6. When placing young frogs, it is necessary to screen the frog species. The selection criteria are strong adaptability, strong activity and health. Before placing them, they need to be soaked and disinfected with salt water or potassium permanganate. The number of frog species placed in each field is uniform.

[0035] Sp7. When placing loach seedlings, you can choose green loach. In the breeding area of ​​green loach, the soil should be sedimentary soil, the color of the soil should be black or brown, and the pH value of the soil should be between 6.5-8.5. Aquatic plants can be placed in the field during the breeding period;

[0036] Sp8. When feeding, a metering pump can be used to pump a fixed amount of feed within a specific time.

[0037] The screen in Sp1 should be 1 meter higher than the bottom of the field, and the water level in the field is 20 cm. The area of ​​each divided rice field is the same. The frog sluice in Sp2 is rectangular in shape, and the ridges around the frog sluice should be thickened and reinforced. The area for raising loaches is sheltered from the wind and facing the sun, with sufficient water sources. The water level detection device in Sp4 has a sensitive response time of 1S, the external material is stainless steel, the internal material is polyurethane, the model is DATA-5101, and the model of the water temperature sensor in Sp4 is 210-101W. When feeding Sp8, you can choose edible meat, animal liver, captured flies and maggots, plant feed such as cooked potatoes, sweet potatoes, rice bran, peanut meal, mealworms, maggots and other live animals, small fish, loaches and other large-grained foods, insects, small fish and shrimps, snails, Three days before the young frogs enter the pond, the feeding amount is calculated according to 4% of the body weight of each young frog put into the pond. Three days later, the required feeding amount is calculated based on the standard of finishing eating within four hours after feeding. The amount of feed during the high temperature feeding period accounts for 5% of the body weight. Insect attractants are inserted on the ridges at night to lure flying insects for frogs to prey on, which indirectly increases vitality. Plant-based feed can be used for feeding loaches. If animal feed is used, earthworms can be used. The accumulated water in the Sp4 rice field used for breeding is discharged when the frogs are collected and pretreated. The pretreatment method adopts anaerobic and aerobic methods. Non-toxic bleaching powder is added to the treated water to ensure the clarity of the water. The area where loaches are cultured is inspected 3 times a day. If the loach swims slowly, pressurization equipment should be used to supply oxygen to the water in the field. The number of inspections needs to be increased in summer.

[0038] It should be noted that the area of ​​the field in Sp1 is about 200 square meters. If it is too large, it will be difficult to observe the activities and feeding conditions of the frogs in the field. The screen in Sp1 should be 1 meter higher than the bottom of the field, and the water level in the field should be 20 cm. The area of ​​each divided rice field is the same. The number and size of the frog pond in Sp2 can be reasonably adjusted according to the density of frog species. After that, the feeding table needs to be built. The natural bait in the rice field cannot meet the feeding needs of a large number of frogs. Therefore, if it is not carried out in time after the frogs are released, Artificial feeding will cause the frog groups to grow asynchronously. Cut the nylon mesh into 2m to 3m long, slightly larger than the frog ditch width, and then stretch it straight along the frog ditch at a certain distance. At night, insect traps can be placed on the ridges. The insect traps are 10W, and the light color of the insect traps is fluorescent. Rice frogs are afraid of direct sunlight, but tend to be attracted by dim light. Fluorescent insect traps are used to attract mosquitoes and provide rice frogs with vision. Free capture can increase the activity of rice frogs and save time at night. The amount of feeding at night, the construction of anti-escape equipment is mainly to prevent frogs from jumping away. After being fixed with bamboo poles or wooden sticks in Sp3, the bottom needs to be compacted with stones to prevent frogs from drilling out from the bottom. Water level detection sensors and water temperature sensors are placed in the rice field. The water level sensor and water temperature sensor both include themselves, transmission parts and control parts. After the water level sensor measures the water level height in the field, it is transmitted to the controller through wireless transmission. The controller can control the water pump after setting the corresponding control conditions through the information collected by the sensor. When the water level is lower than the specified height, the controller will control the water pump to pump water into the field to prevent water shortage in the field and untimely discovery. The function of the water temperature sensor is mainly to prevent bacteria in the field. The suitable temperature for raising rice frogs is between 20℃ and 30℃, so it is necessary to ensure that the temperature is lower than 30℃. If it exceeds this temperature, the field will breed bacteria due to the high temperature. At this time, chlorine-containing preparations should be added for sterilization to prevent frogs from getting sick. The sensitive response time of the water level detection device is 1S,The outer material is stainless steel, the inner material is polyurethane, the model is DATA-5101, and the model of the water temperature sensor is 210-101W. The bird repellent mentioned in Sp5 is an existing device, powered by solar energy, green and environmentally friendly, and scares away birds by emitting sound waves. At the same time, red bleached cloth is inserted on the edge of the field to prevent birds from approaching from a distance and prevent birds from catching frogs. If conditions are sufficient, a layer of protective net can be laid on the field to enhance the bird-blocking effect. When placing frog species in Sp6, it is necessary to screen the frog species and soak them in salt water or potassium permanganate for disinfection, but if the frog If there is a small damage on the surface during transportation, there is no need to soak it. Just add chlorine-containing preparations to the stocking area. The amount of food for daily feeding of frogs should be calculated. The feeding amount is calculated according to 4% of the body weight of each frog in the pond in the first three days before the young frogs enter the pond. After three days, the required feeding amount is calculated based on the standard of eating within four hours after feeding. The amount of feed during the high-temperature feeding period accounts for 5% of the body weight. After the current batch of frogs is caught, the water in the field should be treated by combining anaerobic and aerobic treatment. The principle is to remove organic pollutants in wastewater through microbial decomposition, and then neutralize the pH value of the water, so as to complete the efficient breeding of field frogs. ,

[0039] Sedimentary soil is used in the loach breeding area, which has a fine texture, is rich in organic matter, has good drainage, and the soil pH value is between 6.5-8.5, which can provide a good growth environment for loaches. The fields for breeding loaches in SP2 are divided into three sizes: large, medium and small, so that loaches of different sizes can be bred. The bird repellent installed in SP5 can prevent birds from taking away young frogs and loach seedlings. When placing loach seedlings in SP7, green loach is used. Green loach is the easiest to breed and can be bred even in fields with insufficient precipitation.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprising a reference structure" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for efficiently three-dimensionally cultivating rice frogs and loaches, the cultivation steps comprising: The method comprises the following steps: constructing a breeding ground, digging trenches, constructing escape prevention equipment, screening, sterilizing, purifying water, arranging bird-repelling devices, placing young frogs and loaches, and feeding them at fixed points and in fixed quantities. Sp1. Choose a fertile paddy field for breeding. The paddy field must have sufficient water source, convenient drainage and irrigation, and no pollution. The paddy field ridge is surrounded by bamboo fences. An opening that can be opened and closed is opened on the edge of the field surrounded by the bamboo fence. At the same time, the ridge is left out, and a small door that can be opened is left. The opening is covered with a screen. The paddy field is divided into four parts and all are surrounded by the screen. Two parts are used for young frog breeding and two parts are used for loach breeding. After the rice field is divided, the ridge surface left by the screen is used to lay the material table; Sp2. Construction of frog ditch: dig a rectangular frog ditch with a width of 0.8m and a depth of 1.0m along the inner side of the ridge, and dig frog sluices in the field. The number and size of frog sluices can be reasonably adjusted according to the density of frog species, and the excavated mud can be used to widen, reinforce and raise the ridge. In the loach breeding area, each field is divided into three equal parts. You can use the ridge or wire mesh. After the division, filter holes should be opened to divide the loaches into three types: large, medium and small. Sp3. The construction of anti-escape equipment mainly involves weaving a screen made of nylon or iron wire. The screen is buried 30 cm in the field ridge, with the ground part above 1 m. It is fixed with bamboo poles or wooden sticks every 1.5 m, and the bottom of the screen is compacted with stones; Sp4, water level detection sensors, water quality sensors and water temperature sensors are placed in the rice fields, and the transmission method is wireless transmission. The farmer's mobile phone receives the corresponding information. When the water temperature in the rice field exceeds 30℃, chlorine-containing preparations are added for sterilization. When the water quality is not good, the water in the rice field is replaced; Sp5. A bird repellent is inserted on the ridge of the rice field. The power supply of the bird repellent is solar power, the sound intensity is 90dB, and a red floating cloth connected by a bamboo pole is inserted on the ridge; Sp6. When placing young frogs, it is necessary to screen the frog species. The selection criteria are strong adaptability, strong activity and health. Before placing them, they should be soaked and disinfected with salt water or potassium permanganate. The number of frog species placed in each field should be uniform. SP7. When placing loach seedlings, you can choose green loach. In the breeding area of ​​green loach, the soil should be sedimentary soil, the color of the soil should be black or brown, and the pH value of the soil should be between 6.5-8.

5. Aquatic plants can be placed in the field during the breeding period; SP8. When feeding, a metering pump can be used to pump a fixed amount of feed within a specific time.

2. The method for efficiently breeding rice frogs and loaches in three dimensions according to claim 1, characterized in that: The screen in Sp1 is 1 meter higher than the bottom of the field, and the water level in the field is 20 cm. The area of ​​each divided rice field is the same.

3. The method for efficiently breeding rice frogs and loaches in three dimensions according to claim 1, characterized in that: The frog pond in the Sp2 is rectangular in shape, and the ridges around the frog pond are thickened and reinforced. The area for raising loaches is sheltered from the wind, facing the sun, and has sufficient water resources.

4. The method for efficiently breeding rice frogs and loaches in three dimensions according to claim 1, characterized in that: The water level detection device in the Sp4 has a sensitive response time of 1S, an external material of stainless steel, an internal material of polyurethane, a model of DATA-5101, and a model of the water temperature sensor in the Sp4 of 210-101W.

5. The method for efficiently breeding rice frogs and loaches in three dimensions according to claim 1, characterized in that: When feeding the Sp8, edible meat, animal liver, captured flies and maggots, plant feed such as cooked potatoes, sweet potatoes, rice bran, peanut meal, mealworms, maggots and other live animals, small fish, loaches and other large-particle foods, insects, small fish and shrimps, snails can be used. The feeding amount is calculated according to 4% of the body weight of each young frog in the pond three days before the young frogs enter the pond. After three days, the required feeding amount is calculated based on the standard of eating the whole frog within four hours after feeding. The amount of feed during the high-temperature feeding period accounts for 5% of the body weight. At night, insect attractants are inserted into the ridges to lure flying insects, allowing frogs to prey and indirectly increase vitality. When feeding loaches, plant feed can be used. If animal feed is used, earthworms can be used.

6. The method for efficiently breeding rice frogs and loaches in three dimensions according to claim 1, characterized in that: The accumulated water in the Sp4 rice field used for breeding is discharged when the frogs are collected and pre-treated. The pre-treatment method adopts anaerobic and aerobic methods. Non-toxic bleaching powder is added to the treated water to ensure the clarity of the water. The area where loaches are cultured is inspected three times a day. If the loaches swim slowly, oxygen is supplied to the water in the field through oxygenation equipment. The number of inspections needs to be increased in summer.