Method for efficiently culturing land-sealed Malus salicina by using lifting net cage

Abstract

The invention discloses a method for efficiently culturing land-sealed Malus salicina by using a lifting type net cage, which comprises the following steps of: arranging the lifting type net cage in a culture area which is wide in water surface, leeward and sunny and has no sundries at the water bottom in a single-row or multi-row manner, and arranging the lifting type net cage in a direction perpendicular to the water flow direction, selecting one-year-old fingerlings of land-sealed Malus salicina, putting the fingerlings in a water body with the stocking density of 150-200 fingerlings / m < 3 >, conveying sinking pellet feed to the middle upper part of the lifting type net cage in a conveying pipe form for feeding, and paying attention to daily management and disease control at the same time. According to the method, a suitable growth environment is created according to the biological characteristics of the land-sealed Malus salicina, an ecological breeding technology and a large-water-surface lifting type net cage breeding technology are combined, the land-sealed Malus salicina is bred through intensive, large-scale and ecological efficient lifting type net cages, the breeding period is short, management is convenient, and the breeding cost is low. The device has the advantages of flexibility and simplicity and convenience in operation.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for efficiently culturing land-locked mackerel salmon by utilizing a lifting cage. Background Art

[0002] Landlocked Masu salmon (Oncorhynchus masou) belongs to the Salmoniformes, Salmonidae, Masu salmon genus, also known as cherry trout, cherry salmon, mountain lady trout, etc. It is a precious economic fish in my country. The fish has the advantages of elegant and luxurious body, elegant and bright colors, tender and fresh meat, fast growth rate, strong disease resistance, etc., and is deeply loved by the masses. Under the condition that the breeding cost is almost the same, the economic benefit of this fish is 5 times that of rainbow trout. The current market price is far higher than that of rainbow trout, and the general price per kilogram can reach more than 100 yuan. The fish roe of landlocked Masu salmon is even more precious food, and the price per kilogram can reach more than 5,000 yuan. It can be seen that landlocked Masu salmon has unique market advantages. It not only provides a high-quality breeding variety for fish structure adjustment, but also will have a positive impact and promotion on the development of regional fishery economy.

[0003] In recent years, the breeding of land-enclosed Masu salmon has made a breakthrough. The weight of commercial fish in two-year-old adult fish farming can generally reach 500-1000g / tail, but adult fish farming is limited to factory-scale flow-through farming in cement pools. Since this farming method has extremely high requirements for sites, water sources and infrastructure funds, it is not conducive to large-scale promotion of farming. The optimal water temperature for the life of land-enclosed Masu salmon is 10-20℃, and the optimal water temperature for growth is 17℃. It mostly lives in water temperatures below 20℃, but can still survive when the water temperature is 25℃ under farming conditions. It can still feed and grow under conditions of frozen surface water in winter, and can adapt well to and feed on artificial compound feed under artificial breeding. According to these characteristics of land-enclosed Masu salmon, the future development of land-enclosed Masu salmon farming should be developed in accordance with the concept of "intensive, economical, circular, and ecological".

[0004] Therefore, it is necessary to develop an efficient and environmentally friendly breeding method based on the growth characteristics of land-locked salmon. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for efficiently breeding land-enclosed Massu salmon using a lifting cage, creating a suitable growth environment according to the biological characteristics of the land-enclosed Massu salmon, combining ecological breeding technology with large-surface lifting cage breeding technology, and adopting intensive, large-scale, ecological and efficient lifting cage breeding of land-enclosed Massu salmon. This is a highly intensive breeding method that achieves high yields in a pond lifting cage environment.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for efficiently breeding land-locked mackerel salmon using a lifting cage comprises the following steps:

[0008] S1. Water body selection: Choose a place with a large water surface in a valley that is leeward and sunny with a good ecological environment, with a water depth of more than 5.0m and cool water quality. The water temperature below 1.0m of the water surface during the highest temperature in summer does not exceed 25.0℃, the dissolved oxygen in the water is above 5.0mg / L, the pH value is 7.0-8.5, and the water transparency is above 50cm;

[0009] S2. Fixed lifting cages: lift cages are used, which are set in aquaculture areas with open water surface, leeward, sunny and no debris on the bottom of the water. They are arranged in single or multiple rows, and the arrangement direction of the lift cages is perpendicular to the water flow direction. When the surface water temperature of the water body is lower than 20°C, the lift cages are exposed 30-50cm above the water surface to increase the water temperature in the lift cages. When the surface water temperature of the water body is higher than 25°C, the lift cages are sunk to 1.5-2.0m from the water surface to prevent the water temperature in the lift cages from being too high.

[0010] S3, oxygenation treatment: using an air pump to increase oxygen, setting a microporous oxygenation pipe at the bottom of the lifting cage, and evenly distributing waterwheel-type aerators around the lifting cage;

[0011] S4, lifting cage treatment: 10-15 days before the fingerlings are placed in the lifting cage, the net is soaked in water to allow plankton to attach to the net and make the net smooth, so as to prevent the net from scratching the fish body after the fingerlings are placed in the cage;

[0012] S5. Stocking fish: Select one-year-old landlocked salmon, with a stocking density of 150-200 per m 3 The water body is placed in the box, and the fish species are disinfected before being placed in the box;

[0013] S6. Feeding: Use sinking granular feed, which is delivered to the upper middle part of the lifting cage in the form of a delivery pipe for feeding, to ensure the rapid and healthy growth of the farmed fish, and check the remaining feed half an hour after feeding;

[0014] S7. Daily management: Insist on patrolling the boxes, brushing the boxes diligently, and checking the boxes regularly to ensure the normal operation of the oxygen enrichment equipment;

[0015] S8. Disease prevention and control: Regularly feed medicated bait and supplement vitamins to prevent and treat fish diseases and improve fish resistance.

[0016] Preferably, in step S2, the lifting cage is a single-layer lifting cage woven from polyethylene material, and the mesh density is determined according to the specifications of the land-sealed masu salmon so that the land-sealed masu salmon cannot pass through, and the lifting cage is completely closed on all sides and up and down.

[0017] More preferably, in step S2, the length×width×height of the lifting cage are 5m×5m×2.5m respectively.

[0018] Preferably, in step S2, two rows of columns are set in the selected breeding area, and the distance between the columns is 5m, so as to fix the lifting cage; the lifting cage is supported by a stainless steel pipe frame of 5m×5m×2.5m. Then the lifting cage is fixed on the columns, and can be lifted and lowered at any time.

[0019] Preferably, in step S2, the lifting cage does not contact the bottom of the breeding area.

[0020] Preferably, in step S5, one-year-old land-locked mackerel salmon with a healthy physique, no disease, no injury, no deformity, neat size, active movement, strong agglomeration ability and intact scales and fins are selected as the stocked fish.

[0021] Preferably, in step S5, disinfecting the fish species comprises: immersing the fish species in 2.5% salt water for 10-15 minutes.

[0022] Preferably, in step S6, the checking of the remaining feed includes: if there is any remaining feed, reducing the feeding amount, and keeping the aerator on during feeding; and adding anti-stress substances to the sinking granular feed to reduce the stress response of the land-locked salmon caused by raising and lowering the lifting cage.

[0023] Compared with the prior art, the present invention proposes a method for efficiently breeding land-locked salmon using a lifting cage, and the beneficial effects are:

[0024] 1. The position of the lifting cage in the water body can be adjusted at any time as the climate changes, so that the land-locked Masu salmon can always live in a relatively suitable water temperature during the growth period of the year, effectively extending the growth time of the land-locked Masu salmon, achieving the goal of raising fish and putting them on the market in the same year, and improving the breeding efficiency.

[0025] 2. The breeding cycle is short and the management is convenient. It has the advantages of flexibility and easy operation.

[0026] 3. It is easy to catch, and no special fishing tools are needed for harvesting. The fish can be put on the market all at once, or they can be caught in stages and batches according to market needs, which is convenient for the transportation and storage of live fish and conducive to market regulation.

[0027] 4. The requirements for the breeding water area are not high. As long as there is a certain water level and flow rate, it can be raised. It has strong adaptability and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the breeding area for efficiently breeding landlocked salmon using a lifting cage in the embodiment, wherein two rows of columns are set in the breeding area using angle steel according to breeding needs, with a distance of 5m between the columns. The lifting cage is supported by a 5m×5m×2.5m stainless steel pipe frame and fixed on the columns for taking off and lowering at any time. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the embodiment will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0030] The following embodiments use a lifting cage to efficiently culture landlocked salmon, including:

[0031] 1. Water body selection

[0032] The water body should be located in a valley-type large water surface (lakes, reservoirs, etc.) that is leeward and sunny with a good ecological environment, with a water depth of more than 5.0m. Requirements: The water quality should be cool, the water temperature below 1.0m of the water surface should not exceed 25.0℃ during the highest temperature in summer, the dissolved oxygen in the water should be above 5.0mg / L, the pH value should be 7.0-8.5, and the water transparency should be above 50cm.

[0033] 2. Selection and fixation of lifting cages

[0034] ①Selection of lifting cage

[0035] A single-layer lifting cage made of polyethylene material is selected. The mesh density is determined according to the specifications of the salmon being raised, and is preferably such that the salmon cannot pass through. The lifting cage is completely closed on all sides and up and down. The specifications of the lifting cage are 5m×5m×2.5m in length×width×height respectively.

[0036] ②Set up area

[0037] The lifting cages are set up in a breeding area with an open water surface, sheltered from the wind, facing the sun, no debris on the bottom of the water, and convenient transportation. They are arranged in a single row or multiple rows, and the arrangement direction is perpendicular to the water flow direction.

[0038] ③Fixation of lifting cage.

[0039] In the lifting cage breeding area, two rows of columns are set up with angle steel according to the breeding needs. The distance between the columns is 5m to fix the lifting cage. The lifting cage is supported by a 5m×5m×2.5m stainless steel pipe frame. Then, the lifting cage is fixed on the column and can be raised and lowered at any time. Figure 1 shown.

[0040] When the surface water temperature of the water body is lower than 20℃, the lifting cage is exposed 30-50cm above the water surface to increase the water temperature inside the lifting cage. When the surface water temperature of the water body is higher than 25℃, the lifting cage is sunk to 1.5-2.0m from the water surface to prevent the water temperature inside the lifting cage from being too high. Do not let the lifting cage touch the bottom of the pond.

[0041] 3. Oxygen enrichment equipment

[0042] An air pump is used to increase oxygen, a microporous oxygenation pipe is set at the bottom of the lifting cage, and waterwheel-type aerators are evenly distributed around the lifting cage.

[0043] 4. Lifting cage processing

[0044] 10-15 days before putting the fingerlings into the lifting cage, soak the net in water to allow a certain amount of plankton to attach to the net and make the net smooth to prevent the net from scratching the fish body after the fingerlings enter the cage.

[0045] 5. Free range

[0046] The fish are shipped out of the box in adult sizes, with a stocking density of 150-200 per m 3 Water body; the fish species must be strong, disease-free, injury-free, deformed, of uniform size, active, group-active, with scales and fins intact, and one-year-old fish; the seedlings must be disinfected before being placed in the box and soaked in 2.5% salt water for 10-15 minutes.

[0047] 6. Feeding

[0048] Feeding uses sinking pellet feed, which is delivered to the upper middle part of the lifting cage in the form of a delivery pipe. Feeding is done reasonably to ensure the rapid and healthy growth of farmed fish; check the remaining feed half an hour after feeding, and reduce the feeding amount if there is any remaining feed, and keep the aerator running during feeding; add anti-stress substances to the feed to reduce the stress response that the lifting cage may cause to the salmon.

[0049] 7. Daily management

[0050] Keep patrolling the boxes, cleaning the boxes diligently, and checking the boxes regularly to ensure the normal operation of the oxygen enrichment equipment.

[0051] 8. Disease prevention and control

[0052] Regularly feed medicated bait and supplement vitamins to prevent and treat fish diseases and improve fish resistance.

[0053] Example 1

[0054] Taking a reservoir in a mountainous area in eastern China as an example, if ordinary cages are used for breeding in the water body, when the water temperature is higher than 25.0℃, all the salmon will die within 24 hours; Figure 1 After the lifting cage was installed, the survival rate reached more than 96.7% after 72 hours. The experimental results are shown in Table 1.

[0055] Table 1: Comparative experiment of raising salmon in lifting cages (%)

[0056] Experimental groups 72h survival rate 24h survival rate Ordinary cage 0 0 Lifting cage 96.7 100.0

[0057] As shown in Table 1, when the water temperature is higher than 25.0℃, the survival of cold-water fish such as salmon is greatly restricted, while the lifting cage greatly improves the survival rate of salmon by raising and lowering the height.

[0058] Example 2

[0059] On April 27 of a certain year, 300 fry of Masu salmon were placed in a common cement pool and a lifting cage respectively. Before stocking, they were immersed in 2.5% salt water for 10-15 minutes for disinfection, and then stocked in the cement pool and lifting cage respectively. They were fed with sinking feed. When the fry emerged on November 15, 60 fish samples were randomly taken and weighed. The experiment showed that the survival rate and feed coefficient of the two groups were similar. The weight of Masu salmon cultured in the lifting cage was about twice that of the cement pool. The results are shown in Table 2.

[0060] Table 2: Comparison of cement pool and lifting cage culture experiments (growth indicators)

[0061]

[0062] As can be seen from Table 2, the survival rate, average weight gain rate, specific growth rate and protein efficiency of salmon cultured in lifting cages are better than those in ordinary cement pools, especially the average final weight is almost twice that of ordinary cement pools, which greatly improves the breeding efficiency and economic benefits.

[0063] Example 3

[0064] A growth cycle from June 22 to July 21 of a certain year was selected to measure some indicators of the liver of Masson salmon in ordinary cages and lift cages. The differences in stress resistance, antioxidant capacity and immunity of fish in different lift cages were observed. The results are shown in Table 3.

[0065] Table 3: Comparison of enzyme activity indices in conventional cages and lifting cages

[0066] Experimental groups Ordinary cage Lifting cage Experimental groups Ordinary cage Lifting cage T-SOD 163.22±6.46 152.03±4.96 GOT 11.33±0.29 10.27±0.24 CAT 27.46±1.32 24.71±1.63 GPT 5.08±0.14 6.46±0.28 T-AOC 130.88±4.35 129.07±4.08 LDH 46.14±1.48 46.86±1.32 GSH-PX 6.86±0.18 6.33±0.17 MDA 2.96±0.10 3.45±0.12 ACP 72.84±1.41 75.18±1.04 ALP 41.88±1.52 43.65±1.01

[0067] Total superoxide dismutase (T-SOD) is mainly used to balance the oxidation and antioxidant capacity in fish. Catalase (CAT) can decompose H2O2 in fish into water and molecular oxygen that are harmless to fish. It has a defensive function for fish and is an important enzyme in fish. Total antioxidant capacity (T-AOC) can be used to measure the difference in antioxidant capacity between ordinary cages and lifting cages, thereby measuring the difference in stress response of masu salmon. Glutathione peroxidase (GSH-PX) is also widely present in fish and is used to decompose excess H2O2 in fish. Under acidic conditions, acid phosphatase (ACP) can catalyze and hydrolyze monophosphate in fish into inorganic phosphate. Its concentration can be used to measure whether the fish liver is damaged. Aspartate aminotransferase (GOT), also called aspartate aminotransferase, is an evaluation indicator of whether the fish liver is damaged. Alanine aminotransferase (GPT), like GOT, is also an indicator of liver damage. Lactate dehydrogenase (LDH) is also an important indicator of liver damage in fish, so as to make a multi-angle analysis of liver damage in the experiment. By measuring malondialdehyde (MDA), we can understand the content of lipid compounds in the fish body, and thus infer whether the fish body has cell damage. Like ACP, alkaline phosphatase (ALP) is also present in the liver of fish, which is used as a physiological indicator to assist in measuring whether the fish liver is damaged.

[0068] As shown in Table 3, the GSH-PX content in ordinary cages is significantly higher than that in lifting cages. Since ordinary cages are on the surface of the water body and cannot adjust the water temperature, the temperature difference between day and night causes them to produce stress reactions, causing the body to produce more glutathione peroxidase to protect the fish from excess H2O2.

[0069] The values ​​of enzymes such as T-SOD, CAT, T-AOC, AST, GPT, ALT, and MDA are not much different from those in ordinary cages, indicating that due to the effect of the effectively added anti-stress substances, the lifting of the lifting cages during the breeding process did not produce stress resistance or antioxidant reactions on the Masu salmon. At the same time, because the lifting cages use a feeding method of a conveying pipe, it reduces the waste of bait, saves breeding costs, and plays a role in improving physical fitness.

[0070] Some indicators of the liver of Massoon salmon in ordinary cages and lifting cages (hepatocyte damage index, bilirubin metabolism index, cholestasis index, liver synthetic function index) were measured to observe the differences in liver health of fish in different lifting cages. The results are shown in Table 4.

[0071] Table 4: Comparison of liver health indicators in the culture experiments between ordinary cages and lifting cages

[0072] Experimental groups Ordinary cage Lifting cage Experimental groups Ordinary cage Lifting cage ALT(U / L) 27.70±0.43 18.60±0.46 ALB(g / L) 16.60±0.06 25.07±0.18 AST(U / L) 211.53±0.58 91.47±0.32 GLB(g / L) 22.33±0.24 28.53±0.23 T-BIL (μmol / L) 3.46±0.07 3.88±0.01 A / G 0.72±0.03 0.89±0.17 ALP(U / L) 46.10±0.47 49.03±0.38 CHE(U / L) 254.67±3.17 353.33±0.67

[0073] As shown in Table 4, there is no significant difference in the values ​​of total bilirubin (TBIL) and alkaline phosphatase (ALP) biochemical indicators of Masu salmon raised in lifting cages compared with those in ordinary cages, and the contents of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) are higher than those in ordinary cages, indicating that the lifting cages can always keep the fish living in a suitable water temperature, and add anti-stress drugs in the feed to avoid the impact of external environmental stress such as temperature changes on the health and immunity of the fish, which helps to reduce the risk of liver disease; albumin (ALB) and cholinesterase (CHE) mainly reflect the synthetic function of the liver, and their activity can reflect the reserve function of the liver. The activities of ALB, GLB, A / G, and CHE in the lifting cages are significantly higher than those in ordinary cages, indicating that the lifting and lowering temperature control mode and the delivery tube feeding technology of the lifting cages are conducive to the normal feeding of Masu salmon, ensuring protein intake, improving protein utilization, and ensuring normal protein synthesis in the liver.

[0074] Some blood indices of mackerel salmon in ordinary cages and lifting cages were measured to observe the differences in glucose and lipid metabolism of fish in different lifting cages. The results are shown in Table 5.

[0075] Table 5: Comparison of sugar and lipid metabolism related indicators in the culture experiments of ordinary cages and lifting cages (unit: mmol / L)

[0076] Experimental groups Glu TC TG HDL-C LDL-C Ordinary cage 0.19±0.01 6.10±0.05 2.59±0.38 4.12±0.14 0.24±0.02 Lifting cage 0.07±0.02 6.56±0.04 3.23±0.03 4.36±0.26 0.25±0.01

[0077] Glucose (Glu) is a key indicator reflecting sugar metabolism. As shown in Table 5, the Glu content of Masu salmon in lifting cages is significantly lower than that in ordinary cages, which means that the inability to adjust the temperature in ordinary cages may stimulate the secretion of stress hormones in the fish, leading to increased blood sugar, while lifting cages can avoid the above problems, reduce stress response, and maintain normal blood sugar levels; the values ​​of lipid metabolism-related indicators such as total cholesterol (TC), triglycerides (TG), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C) in the lifting cages are not significantly different from those in ordinary cages, indicating that due to the effective addition of anti-stress substances, the lifting and lowering of the lifting cages during the breeding process did not cause stress response in Masu salmon and did not cause fat metabolism disorders.

[0078] Some indicators of the blood of mackerel in ordinary cages and lift cages were measured to observe the differences in digestive enzyme activities of fish in different lift cages. The results are shown in Table 6.

[0079] Table 6: Comparison of digestive enzyme activity related indicators in the culture experiments of ordinary cages and lifting cages (unit: U / L)

[0080] Experimental groups AMY LPS Ordinary cage 381±0.57 10.67±0.33 Lifting cage 549±0.58 21.00±0.53

[0081] It can be seen from Table 6 that the activities of amylase (AMY) and lipase (LPS) of mackerel in the lifting cages are higher than those in ordinary cages, indicating that the lifting cages ensure that the fish always live in a suitable water temperature by lifting, avoiding the influence of enzyme activity due to too high or too low temperature, which helps the fish digest, absorb and decompose fat and starch in the feed.

[0082] Some blood indices of mackerel in ordinary cages and lift cages were measured to observe the differences in renal function of fish in different lift cages. The results are shown in Table 7.

[0083] Table 7: Comparison of kidney function related indicators in the culture experiments between ordinary cages and lifting cages

[0084] Experimental groups BUN (mmol / L) CREA (μmol / L) BUN / CREA Ordinary cage 1.78±0.02 28.00±0.23 63.57±0.05 Lifting cage 1.82±0.03 29.83±0.39 61.34±0.03

[0085] Urea nitrogen (BUN) is the main end product of protein metabolism, and creatinine (CREA) is a product of muscle metabolism, both of which are mainly excreted through the kidneys. As shown in Table 7, the values ​​of urea nitrogen (BUN), BUN / CREA and other indicators of salmon raised in lifting cages are not significantly different from those in ordinary cages, indicating that due to the effect of effectively added anti-stress substances and the use of delivery tubes to feed feed, the lifting and feeding of lifting cages during the breeding process did not affect the fish's protein utilization efficiency, and the appropriate environmental temperature was more conducive to maintaining normal kidney function.

[0086] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A method for efficiently breeding landlocked salmon using a lifting cage, characterized in that: The following steps are involved: S1. Water body selection: Choose a place with a large water surface in a valley that is leeward and sunny with a good ecological environment, with a water depth of more than 5.0m and cool water quality. The water temperature below 1.0m of the water surface during the highest temperature in summer does not exceed 25.0℃, the dissolved oxygen in the water is above 5.0mg / L, the pH value is 7.0-8.5, and the water transparency is above 50cm; S2. Fixed lifting cages: lift cages are used, which are set in aquaculture areas with open water surface, leeward, sunny and no debris on the bottom of the water. They are arranged in single or multiple rows, and the arrangement direction of the lift cages is perpendicular to the water flow direction. When the surface water temperature of the water body is lower than 20°C, the lift cages are exposed 30-50cm above the water surface to increase the water temperature in the lift cages. When the surface water temperature of the water body is higher than 25°C, the lift cages are sunk to 1.5-2.0m from the water surface to prevent the water temperature in the lift cages from being too high. S3, oxygenation treatment: using an air pump to increase oxygen, setting a microporous oxygenation pipe at the bottom of the lifting cage, and evenly distributing waterwheel-type aerators around the lifting cage; S4, lifting cage treatment: 10-15 days before the fingerlings are placed in the lifting cage, the net is soaked in water to allow plankton to attach to the net and make the net smooth, so as to prevent the net from scratching the fish body after the fingerlings are placed in the cage; S5. Stocking fish: Select one-year-old landlocked salmon, with a stocking density of 150-200 per m 3 The water body is placed in the box, and the fish species are disinfected before being placed in the box; S6. Feeding: Use sinking granular feed, which is delivered to the upper middle part of the lifting cage in the form of a delivery pipe for feeding, to ensure the rapid and healthy growth of the farmed fish, and check the remaining feed half an hour after feeding; S7. Daily management: Insist on patrolling the boxes, brushing the boxes diligently, and checking the boxes regularly to ensure the normal operation of the oxygen enrichment equipment; S8. Disease prevention and control: Regularly feed medicated bait and supplement vitamins to prevent and treat fish diseases and improve fish resistance.

2. The method for efficiently breeding landlocked salmon using a lifting cage according to claim 1, characterized in that: In step S2, the lifting cage is a single-layer lifting cage made of polyethylene material, and the mesh density is determined according to the specifications of the land-sealed masu salmon, so that the land-sealed masu salmon cannot pass through, and the lifting cage is completely closed on all sides and above and below.

3. The method for efficiently breeding landlocked masu salmon using a lifting cage according to claim 2, characterized in that: In step S2, the length×width×height of the lifting cage are 5m×5m×2.5m respectively.

4. The method for efficiently breeding landlocked salmon using a lifting cage according to claim 1, characterized in that: In step S2, two rows of columns are set in the selected breeding area, and the distance between the columns is 5m to fix the lifting cage; the lifting cage is supported by a 5m×5m×2.5m stainless steel pipe frame, and then the lifting cage is fixed on the columns and can be taken off and lowered at any time.

5. The method for efficiently breeding landlocked salmon using a lifting cage according to claim 1, characterized in that: In step S2, the lifting cage does not contact the bottom of the breeding area.

6. The method for efficiently breeding landlocked salmon using a lifting cage according to claim 1, characterized in that: In step S5, one-year-old land-locked type masu salmon with a healthy physique, no disease, no injury, no deformity, neat size, active movement, strong agglomeration ability and intact scales and fins are selected as stocked fish.

7. The method for efficiently breeding landlocked salmon using a lifting cage according to claim 1, characterized in that: In step S5, disinfecting the fish species includes: immersing the fish species in 2.5% salt water for 10-15 minutes.

8. The method for efficiently breeding landlocked salmon using a lifting cage according to claim 1, characterized in that: In step S6, the checking of the remaining material includes: if there is any remaining material, reducing the feeding amount, and the aerator is kept running during feeding.

9. The method for efficiently breeding landlocked salmon using a lifting cage according to claim 1, characterized in that: In step S6, anti-stress substances are added to the sinking granular feed to reduce the stress response of the land-locked salmon caused by raising and lowering the lifting cage.

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