A method and device for stepwise domestication of blue rockfish

Abstract

The application discloses a stepwise domestication method and a domestication device for blue rockfish, and uses vertical downward continuous water flow as an induction signal of 'water flow = feeding' conditioned reflex, and domestication is carried out in a culture pond with a water flow generating device; the water flow generating device generates vertical downward continuous water flow to simulate bait fish swimming when the water flow generating device is turned on; the stepwise domestication method is a full-cycle domestication method for blue rockfish, which comprises live bait, weak live fish bait, ice fresh fish bait and frozen fish paste / fish block. The domestication device adopts straight equidistant water outlets to form a continuous motion line, and the height restores the swimming track of the bait fish group; the vertical downward water outlet only causes gentle water lines and splashes, and does not impact the fish group and scatter the bait, while providing a dynamic feeding signal, and the stress of the fry is reduced to the maximum. The domestication method solves the problems of long bait domestication cycle, difficult conversion and low survival rate.

Description

Technical Field

[0001] This invention belongs to the field of artificial breeding and aquaculture technology for marine economic fish, specifically involving a method for taming blue-spotted mackerel and a matching circulating water simulated live bait taming device. Background Technology

[0002] Blue-spotted mackerel is an important economic marine fish species in the East China Sea and a core protected species of the Xiangshan Port Germplasm Resource Reserve. Artificial breeding has been a long-standing practice.

[0003] Blue-spotted mackerel are aggressive and easily startled. Their artificial breeding and aquaculture techniques face the following technical bottlenecks: they refuse to eat dead bait and formulated feed; the acclimatization period is long and the feed conversion is difficult; they rely on live seawater fry, which is costly and has an unstable supply; and they have a high cannibalism rate and a low survival rate.

[0004] Existing domestication techniques lack matching domestication equipment and feed domestication processes, which cannot meet the needs of industrialized seedling cultivation. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a step-by-step feeding method for blue-spotted mackerel. This feeding method uses circulating water to simulate the water flow of live bait, so that the blue-spotted mackerel will feed on it in a conditioned reflex. The feeding process is a full-cycle feeding method for blue-spotted mackerel, which includes live bait → weak live fish bait → frozen fish bait → frozen fish paste / fish chunks. This solves the problems of long feeding cycle, difficult conversion and low survival rate.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0007] A step-by-step feeding training method for blue-spotted mackerel uses a continuous, vertically downward water flow as an induction signal for the conditioned reflex of water flow equaling feeding. The training is conducted in a rearing tank equipped with a water flow generating device. The water flow generating device includes an outlet that, when activated, produces a continuous, vertically downward water flow to simulate the swimming motion of prey fish. The step-by-step feeding training method includes the following steps:

[0008] Step (1) Feeding live bait fish: Place the blue-spotted mackerel, the target of training, into the culture pond; when feeding, keep the water flow speed of each outlet at 2.0~3.3m / s, feed 4 times a day, and feed 4%~6% of the fish's body weight each time. The feeding time is fixed at 6:00, 10:30, 15:00 and 18:30; continue to operate for 3~5 days to allow the blue-spotted mackerel to stably adapt to the conditioned reflex of flowing water = feeding;

[0009] Step (2), the transition from live fish to frozen dead fish acclimatization stage: When feeding the fish after the live bait feeding in step (1), gradually reduce the activity of the live bait and switch to frozen miscellaneous fish. Simulate feeding with flowing water during feeding; the specific operation of gradually reducing the activity of the live bait includes: starting from the initial 100% live bait feeding, gradually increase the proportion of low-activity bait on a daily basis, and simultaneously reduce the proportion of high-activity bait, and complete the complete process of feeding all live bait, mixed live bait and weak live bait, feeding all weak live bait, mixed weak live bait and frozen dead bait, and feeding all frozen dead bait in sequence; feed 4 times a day, with a single feeding amount of 4%~6% of the fish body weight, and the feeding time is the same as in step (1); the water flow speed is maintained at 2.5~3.0m / s; this stage lasts for 6~8 days;

[0010] Step (3), Fish Paste or Fish Chunk Stage: Feed the fish that have gone through the feeding training stage in Step (2) with fish paste or fish chunks. The fish paste or fish chunks are made from frozen miscellaneous fish into 0.3~0.5cm fish chunks or fish paste. Feed 4 times a day, with a single feeding amount of 4%~6% of the fish body weight, and the feeding time remains unchanged. The water flow speed is 2.0~2.5m / s, and this stage lasts for 5~7 days.

[0011] During the feeding process in steps (1) to (3), the water flow generating device is turned on each time to generate a continuous water flow to simulate the swimming of the bait fish, and then the bait is fed immediately. Once the fish have finished feeding, the water flow generating device is turned off immediately.

[0012] In step (1), the target species for domestication, the blue-spotted mackerel, is a blue-spotted mackerel seedling with an initial body length ≥2.5cm.

[0013] Furthermore, in step (1), the live bait is a live seawater / brackish water fry, which is selected from any one of barracuda fry, black sea bream fry, and large yellow croaker fry, and its body length is 1 / 3 to 1 / 2 of the body length of blue-spotted mackerel.

[0014] In step (1), the blue-spotted mackerel is allowed to adapt to the conditioned reflex process of "water flow → feeding". If there is no obvious stress and the feeding rate is ≥95%, it can enter the next stage.

[0015] In step (2), the specific method for gradually reducing the activity of live bait is as follows: Day 1: 100% live bait; Day 2: 70% live bait + 30% weak live bait; Day 3: 100% weak live bait; Day 4: 70% weak live bait + 30% frozen dead bait; Day 5: 30% weak live bait + 70% frozen dead bait; Day 6: 100% frozen dead bait. Feed 4 times a day, with a single feeding amount of 4%~6% of the fish's body weight. The feeding time is the same as in step (1). The water flow speed is maintained at 2.5~3.0m / s to enhance the swimming simulation effect. This stage lasts for 6~8 days.

[0016] The weak live bait is a live fish that swims slowly and has no ability to escape quickly.

[0017] Furthermore, in step (3), the water flow speed is 2.0~2.5m / s, just enough to make the fish paste or fish pieces float slightly; this stage lasts for 5~7 days, and the seedlings are required to actively feed at a rate of ≥90%.

[0018] In this invention, the entire acclimatization period is stably controlled within 14 to 20 days.

[0019] In the above technical solution, the water temperature in the breeding pond during the acclimatization stage needs to be controlled at 20~25℃, and the feeding management needs to strictly follow the feeding principles of timed, quantitative, and quality feeding.

[0020] In a second aspect, the present invention also provides a training device for implementing the training method, the training device comprising a cuboid-shaped cultivation tank, the cultivation tank being provided with a water flow generating device, the water flow generating device comprising a submersible pump, an upward circulating water pipe, a horizontal circulating water pipe and a downward circulating water pipe arranged sequentially along the water flow direction; the horizontal circulating water pipe is connected to multiple horizontally spaced water outlet pipes along its own length direction, each of the horizontally spaced water outlet pipes having equally spaced water outlet holes evenly distributed along its own length direction;

[0021] Furthermore, a corresponding outlet valve is installed at the inlet end of each of the horizontal outlet pipes. A main valve is installed on the section of the horizontal circulating water pipe near the downstream circulating water pipe.

[0022] Furthermore, all the water outlets are oriented vertically downwards, allowing water to be sprayed vertically downwards.

[0023] Furthermore, the submersible pump is fixedly installed at the bottom corner of the culture tank, and the upward circulating water pipe extends vertically upward along the inner wall of the tank to the upper space of the tank, and then is sealed and connected to the horizontal circulating water pipe spanning the top of the tank.

[0024] In the technical solution of this invention, the water flow direction is vertically downward, which only produces water ripples and splashes, without forming a strong jet, significantly reducing the fright to the fish, while avoiding impacting the bait and improving feeding stability.

[0025] During the development of this invention, the inventors discovered that flow rate has a significant impact on the domestication results.

[0026] In the initial research and development test, the inventor used a flow rate of <2.0m / s throughout the domestication process. At this time, the water flow was weak and the splash was insufficient, which could not form a live bait to simulate dynamics. The fry did not have a feeding response, and the feeding rate of dead bait (fish) and fish paste / fish pieces was less than 30%, and the domestication failed.

[0027] During the mid-stage of research and development, the inventors locked the flow rate at 2.0~3.3m / s, which formed a continuous and stable linear water flow and uniform water splash, closely mimicking the swimming state of the bait fish. More than 90% of the fry developed a conditioned reflex of "flowing water = feeding", and the feeding rate increased to more than 95%.

[0028] In the later stages of research and development, the inventors adopted a phased and precise flow adjustment for the feeding process. In step (2), a strong dynamic water flow of 2.5~3.0m / s was used to enhance the predatory stimulation and ensure a smooth transition to dead bait. In step (3), the flow was reduced to a weak water flow of 2.0~2.5m / s, which only caused the bait to float slightly, avoiding impact and scattering of the bait, and adapting to the low dynamic characteristics of bait without fish body shape.

[0029] This invention establishes a four-tiered feeding ladder: live bait → weak live bait → frozen dead bait → fish paste / fish chunks. Utilizing the characteristic of dead bait retaining the fish's body shape as a transition, it significantly reduces the difficulty of acclimating to non-formable bait, keeping the entire acclimation period stably controlled within 20 days. The logic of this tiered acclimation method is achieved through four progressive stages:

[0030] Live bait stage: Establish conditioned reflexes for feeding in flowing water.

[0031] Weak live bait stage: Reduce dynamics and reduce reliance on live bait.

[0032] The frozen dead bait stage: Preserve the complete fish body characteristics as a key transition and reduce the cognitive resistance of the fry.

[0033] Fish paste / fish chunk stage: Completely loses fish characteristics, the most difficult to tame, relying on early conditioned reflexes and drifting in weak water currents to complete the final transformation.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] (1) The feeding device of the present invention uses straight and equidistant water outlets to form a continuous movement line, which highly restores the swimming trajectory of the bait fish school; the vertical downward water outlet only agitates gentle water ripples and splashes, without impacting the fish school or scattering the bait. While providing dynamic feeding signals, it minimizes the stress on the fry, and is especially suitable for the high difficulty of converting dead bait into shapeless fish paste / fish chunks.

[0036] (2) Precise control of conditioned reflex: The water flow switch is linked to the feeding, resulting in high uniformity of feeding and strong controllability. The flow rate is precisely controlled in stages so that the water flow does not startle the fish or wash away the bait, resulting in high feed utilization and low cannibalism rate. It can be applied on a large scale to the industrial breeding of blue-spotted mackerel.

[0037] (3) The feeding method of the present invention uses flowing water to simulate live bait feeding and uses circulating flowing water to simulate the swimming of bait fish, thus solving the problem of dead bait and refusal to eat formulated feed.

[0038] (4) Closed-loop bait system: The live bait fish mentioned in step (1) can be replaced by marine bait fish or freshwater fish fry, which reduces costs and ensures stable supply. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the feeding device in Example 1.

[0040] The component names corresponding to the labels in the attached diagram are: 1-Cultivation tank; 2-Submersible pump; 3-Upward circulating water pipe; 4-Horizontal circulating water pipe; 5-Downward circulating water pipe; 6-Horizontal outlet pipe; 7-Outlet hole; 8-Outlet valve; 9-Main valve. Detailed Implementation

[0041] Example 1

[0042] Reference Figure 1 A feeding device that generates a circulating water flow to simulate live bait. The device can generate a continuous water flow and splashes to simulate the swimming of bait fish and induce mackerel to feed on non-live bait.

[0043] The training device includes a rectangular breeding tank 1, which is equipped with a water flow generating device. The water flow generating device includes a submersible pump 2, an upward circulating water pipe 3, a horizontal circulating water pipe 4, and a downward circulating water pipe 5 arranged sequentially along the water flow direction. The horizontal circulating water pipe is connected to multiple horizontal water outlet pipes 6 arranged at equal intervals along its own length direction. Each horizontal water outlet pipe has water outlet holes 7 evenly spaced along its own length direction.

[0044] Each horizontal water outlet pipe is equipped with a corresponding water outlet valve 8 at its inlet end, and a main valve 9 is installed at the pipe section of the horizontal circulating water pipe near the downstream circulating water pipe.

[0045] The submersible pump is fixedly installed at the bottom corner of the culture tank. The upward circulating water pipe extends vertically upward along the inner wall of the tank to the upper space of the tank and is then sealed and connected to the horizontal water outlet pipe 6 that spans the top of the tank.

[0046] In practice, the dimensions of the cultivation tank are 6.8m × 3.8m × 1.5m. There are three horizontal water outlet pipes 6 spanning the top of the tank. Each of the three pipes has an individual valve to control the water flow rate. The horizontal water outlet pipes 6 are equipped with equally spaced water outlet holes 7, with a spacing of 15cm and a hole diameter of 2.2mm. The water flow direction from the outlet holes is vertically downwards.

[0047] The power unit uses a built-in submersible pump, and the downflow circulating water pipe 5 returns excess water to the pool, achieving a closed-loop circulation of water within the pool. The piping system features independent flow velocity control for each pipe and is equipped with a main valve for unified control of the overall flow rate.

[0048] In this embodiment, all water outlets 7 are oriented vertically downwards, allowing water to spray out vertically downwards. The vertical downward water flow produces only ripples and splashes, without forming a strong jet, significantly reducing the disturbance to the fish and preventing impact on the bait, thus improving feeding stability.

[0049] A step-by-step feeding method for blue-spotted mackerel, using methods such as Figure 1 The feeding device shown is used to train blue-spotted mackerel. The step-by-step feeding method includes the following steps:

[0050] Step (1) Feeding with live bait fish: Place the blue-spotted mackerel, the target species for acclimation, into the culture tank; maintain the water flow speed at each outlet at 2.0~3.3m / s, feed 4 times a day, with each feeding amount being 4%~6% of the fish's body weight, and feed at fixed times of 6:00, 10:30, 15:00, and 18:30; continue this operation for 4 consecutive days to allow the blue-spotted mackerel to stably adapt to the conditioned reflex of "flowing water = feeding"; the live bait is mullet fry, and its body length is 1 / 3~1 / 2 of the blue-spotted mackerel's body length. The core objective is to allow the blue-spotted mackerel to stably adapt to the conditioned reflex process of "flowing water → feeding at a fixed location", and proceed to the next stage when there is no obvious stress and the feeding rate is ≥95%.

[0051] Step (2), the transition from live fish to frozen dead fish acclimatization stage: When feeding the fish after the live bait fish in step (1), gradually reduce the activity of the live bait and switch to frozen miscellaneous fish. Simulate feeding with flowing water during feeding; the gradual reduction method is as follows: Day 1: 100% live bait; Day 2: 70% live bait + 30% weak live bait; Day 3: 100% weak live bait; Day 4: 70% weak live bait + 30% frozen dead bait; Day 5: 30% weak live bait + 70% frozen dead bait; Day 6: 100% frozen dead bait; feed 4 times a day, with a single feeding amount of 4%~6% of the fish's body weight, and the feeding time is the same as before; maintain the water flow speed at 2.5~3.0m / s to enhance the swimming simulation effect; this stage lasts for 8 days.

[0052] Step (3), Fish Paste or Fish Chunk Stage: Feed the fish that have gone through the feeding training stage in Step (2) with fish paste or fish chunks. The fish paste or fish chunks are made from frozen miscellaneous fish into 0.3~0.5cm fish chunks or fine fish paste. Feed 4 times a day, with a single feeding amount of 4%~6% of the fish body weight, and the feeding time remains unchanged. The water flow speed is 2.0~2.5m / s, just enough to make the fish paste / fish chunks float slightly. This stage lasts for 5 days. The active feeding rate of the fry is required to be ≥90%.

[0053] During the feeding process from step (1) to step (3), the submersible pump is turned on each time the fish is fed, and the water outlet generates a continuous flow of water to simulate the movement of the bait fish. Then the fish are fed immediately, and the water flow generation device is turned off immediately after the fish have finished feeding.

[0054] In Example 1, the conditioned reflex establishment stage: 2.0~3.3 m / s, the largest flow velocity range. During this stage, the fry are only about 2.5 cm long, and individual vitality varies. The lower limit of the flow velocity (2.0 m / s) ensures that even weaker fry can perceive the water flow signal, while the upper limit (3.3 m / s) meets the chasing needs of more vigorous fry, uniformly completing the reflex acclimatization. The transition from weak live fish to frozen dead fish: 2.5~3.0 m / s. In this stage, the bait gradually changes from live bait that can swim independently to frozen dead fish that cannot move independently. The fish rely entirely on the water flow to simulate the bait's movement, requiring a high flow velocity. Only a medium-high flow velocity of 2.5~3.0 m / s can continuously tumble and drift the dead bait, mimicking the dynamics of live fish escaping. Flow velocities exceeding 3.0 m / s will wash frozen miscellaneous fish to the edges and corners of the pond, preventing the fry from concentrating on feeding. Flow velocities below 2.5 m / s cause the bait to sink, rendering the feeding attraction ineffective. Therefore, a narrow range of high flow velocities is limited. Fish paste / During the acclimatization stage, the flow rate is 2.0~2.5m / s, which is the lowest possible flow rate. Strong currents will directly break up the fish paste and quickly wash the fish pieces out of the feeding area, resulting in a large amount of food sinking to the bottom and being wasted. The fish fry have already firmly established the conditioned reflex of "flowing water = feeding", and do not need strong current stimulation. A low speed of 2.0~2.5m / s is enough to cause the fish paste and fish pieces to float slightly, which can stimulate them to compete for food.

[0055] The experimental parameters for the feeding method in Example 1 are as follows:

[0056] (I) Basic experimental conditions

[0057] Initial seedling specifications: 2000 blue-spotted mackerel seedlings with an average body length of 2.5 cm;

[0058] Nurturing pond: 6.8m × 3.8m × 1.5m circulating water acclimatization pond;

[0059] The water temperature is kept stable at 22±1℃, and the feed is given 4 times a day at fixed times and in fixed quantities.

[0060] Using the vertical downward linear water flow combined with the four-stage acclimatization process in this embodiment, the acclimatization of live bait to fish paste / fish chunks can be completed in 17 days under standard conditions.

[0061] (ii) Domestication completion indicators (domestication endpoint, the actual end of 17 days of domestication in this experiment)

[0062] Average body length: 9.64 cm;

[0063] Average weight: 9.99 g;

[0064] Domestication completion rate: 100% of the fry could stably feed on fresh fish paste / fish chunks, and no individuals refused to eat; survival rate during the domestication stage: 82.4%.

[0065] In this embodiment, vertical downward linear water flow simulation is combined with conditioned reflex training for the first time, changing from "passive feeding" to "active feeding", overcoming the problem of double refusal to eat by dead bait and fish paste.

[0066] (III) The flow rate adjustment method during the implementation of Example 1 is as follows:

[0067] 1. The total water flow rate of the submersible pump is fixed, and the water flow is divided into two lines connected in series:

[0068] 1. First route: 3 feeding water pipes (with independent valves on each pipe).

[0069] 2. Second route: Main drain pipe (with main drain valve).

[0070] II. Core Principles of Valve Regulation:

[0071] 1. Main drain valve: controls the flow distribution between the two lines;

[0072] Open the main drain valve: More water flows directly away from the drain pipe, reducing the total flow rate distributed to the three feeding pipes → reducing the flow velocity at the outlet.

[0073] When the main drain valve is closed slightly: less water flows out of the drain pipe, and more water flows into the feeding pipe, thus increasing the flow velocity at the outlet.

[0074] 2. Single-pipe independent valve: controls the flow rate of a single pipe; up to 3 pipes can be adjusted independently.

[0075] When a single-pipe valve is opened wider: the resistance to water flow in the single pipe decreases, the flow rate increases, and the flow velocity at the outlet increases.

[0076] Closing the single-pipe valve slightly increases the resistance to water flow in the single pipe, resulting in a smaller flow rate and a reduced flow velocity at the outlet.

[0077] Flow velocity parameters for each stage

[0078]

[0079] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A step-by-step domestication method for blue-spotted mackerel, characterized in that, Using a continuous, vertically downward water flow as the induction signal for the conditioned reflex of water flow equaling feeding, training fish to feed is conducted in a culture tank equipped with a water flow generating device; the water flow generating device includes a water outlet that, when activated, generates a continuous, vertically downward water flow to simulate the swimming motion of prey fish; the step-by-step training method includes the following steps: Step (1) Feeding live bait fish: Place the blue-spotted mackerel, the target of training, into the culture pond; when feeding, keep the water flow speed of each outlet at 2.0~3.3m / s, feed 4 times a day, and feed 4%~6% of the fish's body weight each time. The feeding time is fixed at 6:00, 10:30, 15:00 and 18:30; continue to operate for 3~5 days to allow the blue-spotted mackerel to stably adapt to the conditioned reflex of flowing water = feeding; Step (2), the transition from live fish to frozen dead fish acclimatization stage: When feeding the fish after the live bait feeding in step (1), gradually reduce the activity of the live bait and switch to frozen miscellaneous fish. Use flowing water to simulate feeding. The specific operation of gradually reducing the activity of the live bait includes: starting from the initial 100% live bait feeding, gradually increase the proportion of low-activity bait on a daily basis, and simultaneously reduce the proportion of high-activity bait. Complete the complete process of feeding all live bait, mixed live bait and weak live bait, feeding all weak live bait, mixed weak live bait and frozen dead bait, and feeding all frozen dead bait in sequence. Feed 4 times a day, with a single feeding amount of 4%~6% of the fish's body weight. The feeding time is the same as in step (1). The water flow speed is maintained at 2.5~3.0m / s. This stage lasts for 6~8 days. Step (3), Fish Paste or Fish Chunk Stage: Feed the fish that have gone through the feeding training stage in Step (2) with fish paste or fish chunks. The fish paste or fish chunks are made from frozen miscellaneous fish into 0.3~0.5cm fish chunks or fish paste. Feed 4 times a day, with a single feeding amount of 4%~6% of the fish body weight, and the feeding time remains unchanged. The water flow speed is 2.0~2.5m / s, and this stage lasts for 5~7 days. During the feeding process in steps (1) to (3), the water flow generating device is turned on each time to generate a continuous vertical downward water flow to simulate the swimming of the bait fish, and then the bait is fed immediately. After the fish have finished feeding, the water flow generating device is turned off immediately.

2. The step-by-step domestication method for blue-spotted mackerel according to claim 1, characterized in that, In step (1), the blue-spotted mackerel that is being domesticated is a blue-spotted mackerel seedling with an initial body length ≥ 2.5 cm.

3. The step-by-step domestication method for blue-spotted mackerel according to claim 1, characterized in that, In step (1), the live bait is a live seawater / brackish water fry, which is selected from any one of barracuda fry, black sea bream fry, and large yellow croaker fry, and its body length is 1 / 3 to 1 / 2 of the body length of blue-spotted mackerel.

4. The step-by-step domestication method for blue-spotted mackerel according to claim 1, characterized in that, In step (2), the specific method of gradually reducing the activity of live bait is as follows: Day 1: 100% live bait; Day 2: 70% live bait + 30% weak live bait; Day 3: 100% weak live bait; Day 4: 70% weak live bait + 30% frozen dead bait; Day 5: 30% weak live bait + 70% frozen dead bait; Day 6: 100% frozen dead bait; feed 4 times a day, with a single feeding amount of 4%~6% of the fish's body weight.

5. The step-by-step domestication method for blue-spotted mackerel according to claim 1, characterized in that, In step (3), the seedlings actively compete for food at a rate of ≥90%.

6. The step-by-step domestication method for blue-spotted mackerel according to claim 1, characterized in that, In steps (1) to (3), the entire acclimatization period is 14 to 20 days.

7. A taming apparatus for implementing the taming method according to any one of claims 1-6, characterized in that, The system includes a rectangular culture tank (1), which is equipped with a water flow generating device. The water flow generating device includes a submersible pump (2), an upward circulating water pipe (3), a horizontal circulating water pipe (4), and a downward circulating water pipe (5) arranged sequentially along the water flow direction. The horizontal circulating water pipe is connected to multiple horizontal water outlet pipes (6) arranged at equal intervals along its own length direction. Each horizontal water outlet pipe has water outlet holes (7) evenly spaced along its own length direction. Furthermore, each of the horizontal water outlet pipes is equipped with a corresponding water outlet valve (8) at its inlet end.

8. A taming apparatus for implementing the taming method of claim 7, characterized in that, A main valve (9) is installed at the section of the horizontal circulating water pipe near the downstream circulating water pipe.

9. A taming apparatus for implementing the taming method of claim 8, characterized in that, The opening direction of the water outlet (7) is vertically downward.

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