A daphnia expanded culture system and method

Abstract

The application relates to the technical field of zooplankton culture, and discloses a daphnia magna propagation system and method, which comprises a pretreatment unit and a daphnia magna propagation tank. The pretreatment unit comprises a water storage bin, an overflow box and a pulverizer. A water inlet and a water outlet are arranged on the water storage bin. The overflow box is fixedly arranged in the water storage bin. The pulverizer is fixedly arranged in the overflow box. The daphnia magna propagation tank is connected with the water outlet. Water and algae for daphnia magna culture enter the water storage bin through the water inlet, are crushed by the pulverizer, and then enter the daphnia magna propagation tank through the water outlet for daphnia magna to eat. The water storage bin, the overflow box and the pulverizer can crush the algae with a particle size not meeting the requirements and add the algae into the daphnia magna propagation tank. The method can save the input cost of the algae, realize automatic addition of the algae, and improve the propagation efficiency of the algae.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of zooplankton culture, and particularly relates to a daphnia magna culture system and method. BACKGROUND

[0002] Daphnia magna is a kind of zooplankton in water, which feeds on algae and has rich protein, and is widely used in the fields of algae removal and environmental governance, and can also be used as food for fish, so the large-scale culture of daphnia magna has great significance.

[0003] The patent application No. CN104273101A discloses an artificial culture method of micro naked abdomen daphnia or horned netted daphnia. The technical scheme of the present application is to collect daphnia species in the wild, and then to artificially culture the micro naked abdomen daphnia or horned netted daphnia in large scale through steps of indoor washing, domestication and large-scale culture. The present application improves the success rate of domesticating the wild micro naked abdomen daphnia or horned netted daphnia, shortens the domestication time, and the domesticated individuals have great reproductive potential. The micro naked abdomen daphnia or horned netted daphnia obtained through the culture can meet the requirement of experimental zooplankton for consistent genotype, the micro naked abdomen daphnia obtained through the culture can be used for the treatment of harmful algae bloom, and the horned netted daphnia obtained through the culture can be used as an indicator organism for the physicochemical properties of water body. The present application has the advantages of simple operation method, low cost and easy to master.

[0004] In the above technical scheme, the chlorella vulgaris is used as bait for daphnia, and the particle size and density of the bait are limited to facilitate the consumption of daphnia. However, the water algae with the required particle size usually needs to be purchased separately, and then added to the culture and proliferation tank after being mixed. This kind of algae adding method has relatively high cost and cannot realize automation, which is not conducive to improving the efficiency of daphnia culture and proliferation. SUMMARY

[0005] Therefore, the present application provides a daphnia culture and proliferation system and method, which can automatically realize the crushing and adding of water algae and improve the efficiency of daphnia culture and proliferation.

[0006] The technical scheme of the present application is realized in the following manner. On one hand, the present application provides a daphnia culture and proliferation system, which comprises a pretreatment unit and a daphnia proliferation tank, wherein,

[0007] The pretreatment unit comprises a water storage bin, an overflow box and a pulverizer, wherein,

[0008] The water storage bin is provided with a water inlet and a water outlet;

[0009] The overflow box is fixedly arranged in the water storage bin and located below the water inlet and above the water outlet, and the top of the overflow box is provided with an opening;

[0010] The pulverizer is fixedly arranged in the overflow box;

[0011] The water-droplet breeding tank is communicated with the water outlet, and the water-droplet culture water and the water algae enter the water storage compartment through the water inlet, are broken by the pulverizer, and then enter the water-droplet breeding tank through the water outlet for the water-droplets to eat.

[0012] On the basis of the above technical scheme, preferably, the pulverizer comprises a base, a top seat, a plurality of branch plates and an ultrasonic generator, wherein,

[0013] The base is fixedly arranged at the bottom side in the overflow box;

[0014] The top seat is fixedly arranged above the overflow box;

[0015] The branch plates are respectively fixedly arranged at the top side of the base and the bottom side of the top seat, the branch plates on the base and the branch plates on the top seat are arranged alternately, a plurality of the branch plates are arranged in parallel and at intervals, and the end portions of the branch plates are sealingly connected with the inner wall of the overflow box;

[0016] The ultrasonic generator is respectively fixedly arranged in the base and the top seat.

[0017] Further preferably, the pretreatment unit further comprises a particle size sensor and a circulating pump, wherein,

[0018] The particle size sensor is fixedly arranged below the water storage compartment and is used for detecting the particle size of the broken water algae;

[0019] The circulating pump is fixedly arranged in the water storage compartment, the output end of the circulating pump is communicated with the bottom of the water storage compartment, and the input end of the circulating pump is communicated with the inside of the overflow box.

[0020] Further preferably, the pretreatment unit further comprises a filter and a sterilizer, and the water outlet, the filter, the sterilizer and the water-droplet breeding tank are communicated in sequence.

[0021] Further preferably, it further comprises a phototrophic unit, and the phototrophic unit comprises a phototrophic pipe, an LED light source and an aeration pump, wherein,

[0022] The phototrophic pipe is a transparent tubular structure, one end of the phototrophic pipe is communicated with the water outlet, and the other end of the phototrophic pipe is communicated with the water-droplet breeding tank;

[0023] The LED light source is arranged outside the phototrophic pipe and is used for providing light for the inside of the phototrophic pipe;

[0024] The output end of the aeration pump is communicated with the inside of the phototrophic pipe and is used for providing air into the phototrophic pipe.

[0025] Further more preferably, the system further comprises an in-situ propagation unit, which comprises a lake and a separation net fixedly arranged in the lake and surrounded by the inner wall of the lake to form a propagation area for breeding daphnia in the daphnia propagation tank.

[0026] On the basis of the above technical scheme, preferably, the daphnia propagation tank comprises a tank body, a stirrer and an oxygenator, wherein,

[0027] The tank body is connected with the phototrophic pipe and / or the water outlet;

[0028] The stirrer and the oxygenator are fixedly arranged in the tank body and used for stirring water in the tank body and providing oxygen for the water in the tank body, respectively.

[0029] On the basis of the above technical scheme, preferably, the phototrophic pipe comprises a plurality of sub-pipes, and the plurality of sub-pipes are arranged in parallel and at intervals and are connected in series in an S shape.

[0030] In a second aspect, the present application provides a daphnia propagation method using the daphnia propagation system described above, which comprises the following steps:

[0031] S1, water and water algae for daphnia culture are delivered into the water storage compartment through the water inlet, and the ultrasonic generator is started to drive the pulverizer to crush the water algae;

[0032] S2, the water and water algae for daphnia culture in the water storage compartment are filtered by the filter and disinfected by the sterilizer, and then according to the actual demand, the water and water algae for daphnia culture are flowed into the phototrophic unit by controlling the pipeline;

[0033] S3, the LED light source and the aeration pump are turned on to provide light and air for the reproduction of the water algae, and fresh and live concentrated algal liquid is added into the phototrophic pipe;

[0034] S4, after the water algae in the phototrophic pipe are reproduced to a preset density, the water algae are delivered into the daphnia propagation tank;

[0035] S5, according to the growth condition of daphnia, the pipeline is controlled to be turned on or turned off to select whether the water and water algae for daphnia culture in the pretreatment unit are directly flowed into the daphnia propagation tank, or the water and water algae for daphnia culture in the phototrophic unit are flowed into the daphnia propagation tank, or the water and water algae for daphnia culture in the pretreatment unit and the water and water algae for daphnia culture in the phototrophic unit are proportionally flowed into the daphnia propagation tank;

[0036] S6, after the daphnia in the daphnia propagation tank is bred to a specified density or state, the mixed solution in the daphnia propagation tank is added to the expansion propagation area.

[0037] On the basis of the above technical solutions, preferably, in step S1, the particle size sensor is started, and when the particle size of the water algae detected by the particle size sensor is greater than a specified value, the circulating pump is started, the water algae in the water storage bin is pumped back to the overflow box, and the water algae is secondarily crushed by the crusher.

[0038] The water algae expansion system and method of the present application has the following beneficial effects compared with the prior art:

[0039] (1) By providing the water storage bin, overflow box and crusher, the water algae that does not meet the required particle size can be crushed and added to the daphnia propagation tank, which not only saves the input cost of water algae, but also realizes automatic addition of water algae and improves the efficiency of water algae expansion.

[0040] (2) By providing the particle size sensor and circulating pump, the particle size of the water algae added to the daphnia propagation tank can be monitored in real time, and when the particle size of the water algae is too large, the circulating pump is used to pump the water algae back to the crusher for secondary crushing, thereby ensuring the particle size requirement of the water algae.

[0041] (3) By providing the phototrophic unit, the water algae can be propagated when the water algae content is low, and by providing the in-situ expansion unit, the growth environment of the daphnia is more suitable for the growth of the daphnia, thereby better meeting the growth requirements of the daphnia. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0043] Figure 1 Fig. 1 is a structural schematic view of a water algae expansion system of the present application;

[0044] Figure 2 Fig. 3 is a sectional view of a pretreatment unit in the water algae expansion system of the present application;

[0045] Figure 3 Fig. 5 is a sectional view of a crusher in the water algae expansion system of the present application;

[0046] Figure 4 Fig. 7 is a structural schematic view of a phototrophic unit in the water algae expansion system of the present application;

[0047] Figure 5 This is a cross-sectional view of a Daphnia propagation tank in a Daphnia propagation system according to the present invention;

[0048] Figure 6 This is a top view of an in-situ propagation unit in a hydroponics propagation system according to the present invention;

[0049] Figure 7 This is a cross-sectional view of an in-situ propagation unit in a hydroponics propagation system according to the present invention.

[0050] The components include: 1. Pretreatment unit; 11. Water storage tank; 12. Overflow box; 13. Crusher; 131. Base; 132. Top seat; 133. Branch plate; 134. Ultrasonic generator; 14. Particle size sensor; 15. Circulation pump; 16. Filter; 17. Sterilizer; 101. Inlet; 102. Outlet; 103. Opening; 2. Daphnia propagation tank; 21. Tank body; 22. Agitator; 23. Aerator; 3. Photoculture unit; 31. Photoculture pipe; 311. Branch pipe; 32. LED light source; 33. Aeration pump; 4. In-situ expansion unit; 41. Lake; 42. Isolation net; 401. Expansion and propagation area. Detailed Implementation

[0051] The technical solutions of this invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0052] like Figures 1-7 As shown, a Daphnia hydroponics propagation system of the present invention includes a pretreatment unit 1, a Daphnia hydroponics propagation tank 2, a photoculture unit 3, and an in-situ propagation unit 4.

[0053] The pretreatment unit 1 is used to refine and break down the algae to meet the particle size requirements. The pretreatment unit 1 includes a water storage tank 11, an overflow box 12, a pulverizer 13, a particle size sensor 14, and a circulating pump 15. The water storage tank 11 has an inlet 101 and an outlet 102. The overflow box 12 is fixedly installed inside the water storage tank 11, located below the inlet 101 and above the outlet 102. The top of the overflow box 12 has an opening 103, such as... Figure 2As shown, the overflow box 12 is located directly below the water inlet 101, when the water algae and water daphnia culture water enters the water storage bin 11 through the water inlet 101, it is first stored in the overflow box 12, when the water daphnia culture water in the overflow box 12 is over the opening 103, it flows into the water storage bin 11, and then is added to the subsequent process through the water outlet 102; the pulverizer 13 is fixedly arranged in the overflow box 12, which is used for breaking and refining the water algae; the particle size sensor 14 is fixedly arranged below the water storage bin 11, which is used for detecting the particle size of the broken water algae; the circulating pump 15 is fixedly arranged in the water storage bin 11, the output end of which is connected with the bottom of the water storage bin 11, and the input end of which is connected with the inside of the overflow box 12, when the particle size sensor 14 monitors that the particle size of the water algae is too large, the circulating pump 15 is used to suck the water algae back to the overflow box 12, and the pulverizer 13 is used to break and refine the water algae again.

[0054] The water daphnia propagation tank 2 is used for breeding water daphnia, and the water daphnia propagation tank 2 is connected with the water outlet 102, the water daphnia culture water and the water algae first enter the water storage bin 11 through the water inlet 101, are broken by the pulverizer 13, and then enter the water daphnia propagation tank 2 through the water outlet 102 for the water daphnia to eat, the water algae with the required particle size has a high purchase cost, through the breaking and refining and adding of the water algae by the pretreatment unit 1, not only the input cost of the water algae can be reduced, but also the automatic adding of the water algae can be realized, and the efficiency of the water algae expansion is improved; at the same time, through the arrangement of the particle size sensor 14 and the circulating pump 15, the particle size of the water algae added to the water daphnia propagation tank 2 can be monitored in real time, when the particle size of the water algae is too large, the circulating pump 15 is used to suck the water algae back to the pulverizer 13 for secondary breaking, so that the particle size requirement of the water algae is ensured.

[0055] As shown in the figure, Figure 5 The water daphnia propagation tank 2 includes a tank body 21, a stirrer 22 and an oxygenator 23, wherein the tank body 21 is connected with the phototrophic pipe 31 and / or the water outlet 102; the stirrer 22 and the oxygenator 23 are fixedly arranged in the tank body 21, and are respectively used for stirring the water in the tank body 21 and providing oxygen for the water in the tank body 21, so that the water daphnia and the water algae in the water daphnia propagation tank 2 are uniformly distributed and grow rapidly.

[0056] In order to ensure the safety of the water daphnia culture water, the pretreatment unit 1 further includes a filter 16 and a sterilizer 17, as shown in the figure, Figure 2 The water outlet 102, the filter 16, the sterilizer 17 and the water daphnia propagation tank 2 are sequentially connected, so as to filter and sterilize the water daphnia culture water, of course, the filtering diameter of the filter 16 should be larger than the particle size of the water algae.

[0057] As shown in the figure, Figure 3As shown, the pulverizer 13 includes a base 131, a top seat 132, multiple branch plates 133, and an ultrasonic generator 134. The base 131 is fixedly disposed on the bottom side inside the overflow box 12; the top seat 132 is fixedly disposed on the top side inside the overflow box 12; the branch plates 133 are respectively fixedly disposed on the top side of the base 131 and the bottom side of the top seat 132. The branch plates 133 on the base 131 and the top seat 132 are alternately arranged, and the multiple branch plates 133 are parallel and spaced apart. The ends of the branch plates 133 are connected to... The inner wall of the overflow box 12 is sealed; the ultrasonic generators 134 are fixedly installed inside the base 131 and the top seat 132 respectively; when the two ultrasonic generators 134 are started, the branch plates 133 can be vibrated. When the algae pass through multiple branch plates 133 in an S-shaped path with the water used for the cultivation of Algae, the vibration of the branch plates 133 can not only accelerate the water flow, but also gather and break up the algae in the water; at the same time, the gap between two adjacent branch plates 133 is small, which can also filter impurities.

[0058] The main effects of ultrasound are cavitation, mechanical, thermal and thixotropic effects.

[0059] The cavitation effect of ultrasound refers to the dynamic process by which tiny bubble nuclei existing in a liquid undergo expansion and compression phases under the action of ultrasound. Their volume grows, contracts, regenerates, and contracts again. Through periodic oscillations, the bubble nuclei eventually collapse. When the ultrasonic frequency is less than or equal to the resonant frequency of the bubble, the bubble will break. The fragmentation and refinement of algae requires an ultrasonic frequency in the range of 28-500kHz.

[0060] The mechanical effect of ultrasound refers to the positive and negative pressures generated by the alternating compression and expansion of particles in biological tissues when ultrasound propagates in a medium. The effects caused by mechanical quantities such as velocity, acceleration, displacement, and pressure are also produced by this effect. The fragmentation and refinement of algae also occurs through this effect.

[0061] The thermal effect refers to the increase in temperature of a medium caused by the continuous absorption of its energy during the propagation of ultrasound. The mechanisms of this thermal effect include: heat generation through the loss (absorption) of acoustic energy density in the medium as ultrasound passes through the body; heat generation through alternating pressure changes and compression phases as ultrasound passes through the medium; and heat generation through the reflection of ultrasound energy at different tissue interfaces. In addition, the standing waves formed in different tissue media, causing friction between particles and ions, are another cause of heat generation. While ultrasound-induced temperature rise is not the primary mechanism of action in biological reactions, it is still an important influencing factor, providing some heat for the growth of algae or other marine organisms.

[0062] Thixotropy effect refers to the change of the bonding state of biological tissues caused by ultrasonic waves, such as the decrease of viscosity causing the plasma to become thinner and the blood cells to precipitate, etc., when the sound intensity is too high, the thixotropy effect is irreversible change, which will cause damage to biological tissues, thereby crushing and refining the water algae.

[0063] The phototrophic unit 3 is used for culturing water algae, and the phototrophic unit 3 comprises a phototrophic pipe 31, an LED light source 32 and an aeration pump 33, wherein the phototrophic pipe 31 is a transparent tubular structure, one end of which is in communication with the water outlet 102, and the other end is in communication with the daphnia propagation tank 2; the LED light source 32 is arranged outside the phototrophic pipe 31 and is used for providing light to the inside of the phototrophic pipe 31; the output end of the aeration pump 33 is in communication with the inside of the phototrophic pipe 31 and is used for providing air to the inside of the phototrophic pipe 31; as shown in Figure 1 When the demand for water algae in the daphnia propagation tank 2 is high, the water algae can be re-cultured by adding fresh concentrated algal liquid to the phototrophic pipe 31, and then added to the daphnia propagation tank 2 to meet the growth demand of daphnia; a water pump and a water quality sensor can also be arranged inside to circulate the algal liquid and detect the water quality in real time, thereby improving the growth efficiency of water algae.

[0064] As shown in Figure 4 The phototrophic pipe 31 comprises a plurality of branch pipes 311, the plurality of branch pipes 311 are arranged in parallel and at intervals and are connected in series in an S shape, so that the occupied space of the phototrophic pipe 31 can be reduced, and the number of LED light sources 32 can be reduced.

[0065] The in-situ expansion and cultivation unit 4 is used for keeping the normal environment of daphnia consistent with the water body, and the in-situ expansion and cultivation unit 4 comprises a lake 41 and a separation net 42, the separation net 42 is fixedly arranged in the lake 41 and forms an expansion and cultivation area 401 with the inner wall thereof, which is used for storing and cultivating the daphnia in the daphnia propagation tank 2, as shown in Figure 7 The separation net 42 separates the expansion and cultivation area 401 in the lake 41, and after the density of water algae in the daphnia propagation tank 2 reaches the specified index, the daphnia is added to the lake 41 in the expansion and cultivation area 401 for growth, which is beneficial to improve the expansion and cultivation efficiency of daphnia, and the separation net 42 not only avoids the diffusion of daphnia, but also avoids other organisms from entering the expansion and cultivation area 401.

[0066] The daphnia expansion and cultivation method of the present application is as follows:

[0067] S1, the water and water algae for daphnia cultivation are transported into the water storage bin 11 through the water inlet 101, and the ultrasonic generator 134 is started to drive the pulverizer 13 to crush the water algae;

[0068] During the period, if the size of the water algae is required to be larger, the size sensor 14 can be started, and when the size sensor 14 detects that the size of the water algae is larger than a specified value, the circulating pump 15 is started to draw the water algae in the water storage bin 11 back to the overflow box 12, and the pulverizer 13 is used to crush the water algae again;

[0069] S2, the water algae in the water storage bin 11 is filtered by the filter 16 and disinfected by the sterilizer 17, and then the water algae is flowed into the phototrophic unit 3 by the control of the pipeline;

[0070] S3, the LED light source 32 and the aeration pump 33 are opened to provide light and air for the propagation of the water algae, and the fresh and live concentrated algae liquid is added into the phototrophic tube 31;

[0071] S4, after the water algae in the phototrophic tube 31 is propagated to a preset density, the water algae is transported into the water flea propagation tank 2;

[0072] S5, according to the growth condition of the water flea, the pipeline is controlled to be opened or closed to select that the water algae in the pretreatment unit 1 is directly entered into the water flea propagation tank 2, or the water algae in the phototrophic unit 3 is entered into the water flea propagation tank 2, or the water algae in the pretreatment unit 1 and the water algae in the phototrophic unit 3 are entered into the water flea propagation tank 2 in a certain proportion;

[0073] S6, after the water flea in the water flea propagation tank 2 is propagated to a specified density or state, the mixed liquid in the water flea propagation tank 2 is added into the expansion propagation area 401.

[0074] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hydroponics propagation system, characterized in that: It includes a pretreatment unit (1) and a water flea breeding tank (2). The pretreatment unit (1) includes a water storage tank (11), an overflow box (12) and a pulverizer (13). The water storage tank (11) is provided with an inlet (101) and an outlet (102). The overflow box (12) is fixedly installed inside the water storage tank (11) and located below the water inlet (101) and above the water outlet (102). The top of the overflow box (12) is provided with an opening (103). The pulverizer (13) is fixedly installed inside the overflow box (12); The Daphnia glutinosa propagation tank (2) is connected to the outlet (102). The water and algae used for Daphnia glutinosa cultivation first enter the water storage tank (11) through the inlet (101) and are crushed by the crusher (13). Then, they enter the Daphnia glutinosa propagation tank (2) through the outlet (102) to feed the Daphnia glutinosa. The pulverizer (13) includes a base (131), a top seat (132), multiple branch plates (133), and an ultrasonic generator (134). The base (131) is fixedly disposed on the bottom side inside the overflow box (12); the top seat (132) is fixedly disposed on the top side inside the overflow box (12); the branch plates (133) are respectively fixedly disposed on the top side of the base (131) and the bottom side of the top seat (132). The branch plates (133) on the base (131) and the branch plates (133) on the top seat (132) are alternately disposed, and the multiple branch plates (133) are parallel and spaced apart. The ends of the branch plates (133) are sealed to the inner wall of the overflow box (12); the ultrasonic generator (134) is respectively fixedly disposed inside the base (131) and the top seat (132). The pretreatment unit (1) also includes a particle size sensor (14) and a circulation pump (15). The particle size sensor (14) is fixedly installed below the water storage tank (11) and is used to detect the particle size of the crushed algae. The circulating pump (15) is fixedly installed in the water storage tank (11). Its output end is connected to the bottom of the water storage tank (11), and its input end is connected to the inside of the overflow box (12). When the particle size sensor (14) detects that the particle size of the algae is greater than a specified value, the circulating pump (15) is started to pump the algae in the water storage tank (11) back to the overflow box (12) and the algae are crushed a second time by the pulverizer (13). The Daphnia galbana propagation system also includes a photo-cultivation unit (3), which includes a photo-cultivation tube (31). One end of the photo-cultivation tube (31) is connected to the water outlet (102), and the other end is connected to the Daphnia galbana propagation tank (2). The hydroponics propagation tank (2) is also connected to the water outlet (102); The Daphnia spp. propagation system also includes an in-situ propagation unit (4), which includes a lake (41) and an isolation net (42). The isolation net (42) is fixedly installed in the lake (41) and encloses the inner wall of the lake (41) to form a propagation and breeding area (401) for storing Daphnia spp. from the Daphnia spp. propagation tank (2).

2. The hydroponics propagation system as described in claim 1, characterized in that: The pretreatment unit (1) also includes a filter (16) and a sterilizer (17), and the outlet (102), the filter (16), the sterilizer (17) and the water flea breeding tank (2) are connected in sequence.

3. The hydroponics propagation system as described in claim 2, characterized in that: The photo-nurturing unit (3) also includes an LED light source (32) and an aeration pump (33), wherein, The photo-enhancing tube (31) is a transparent tubular structure; The LED light source (32) is disposed outside the phototube (31) and is used to provide illumination to the inside of the phototube (31); The output end of the aeration pump (33) is connected to the interior of the photo-nurturing tube (31) and is used to supply air into the photo-nurturing tube (31).

4. The hydroponics propagation system as described in claim 3, characterized in that: The Daphnia magma propagation tank (2) includes a tank body (21), a stirrer (22), and an aerator (23). The agitator (22) and the aerator (23) are fixedly installed inside the tank (21) and are used to agitate the water in the tank (21) and provide oxygen to the water in the tank (21), respectively.

5. The hydroponics propagation system as described in claim 4, characterized in that: The photo-nurturing tube (31) includes multiple branch tubes (311), which are arranged in parallel and spaced apart, and connected in an S-shape.

6. A method for propagating Daphnia hydropiper, using the Daphnia hydropiper propagation system as described in claim 5, characterized in that, Includes the following steps: S1, the water for cultivating Daphnia galbana and the algae are transported to the water storage tank (11) through the water inlet (101), and the ultrasonic generator (134) is started to drive the pulverizer (13) to break up the algae; S2, after the water for cultivating Daphnia in the water storage tank (11) is filtered by the filter (16) and disinfected by the sterilizer (17), the water for cultivating Daphnia and algae in the water storage tank (11) are allowed to flow into the photo-cultivation unit (3) according to actual needs and by controlling the pipeline. S3, turn on the LED light source (32) and the aeration pump (33) to provide light and air for the reproduction of algae, and add fresh concentrated algae solution into the photo-nurturing tube (31); S4. After the algae in the photo-nurturing tube (31) have multiplied to the preset density, they are transported to the aquatic daphne propagation tank (2). S5, control the opening and closing of the pipeline according to the growth status of Daphnia, so as to select whether to let the Daphnia culture water and algae in the pretreatment unit (1) directly enter the Daphnia propagation tank (2), or let the Daphnia culture water and algae in the photo-cultivation unit (3) enter the Daphnia propagation tank (2), or let the Daphnia culture water and algae in the pretreatment unit (1) and the Daphnia culture water and algae in the photo-cultivation unit (3) enter the Daphnia propagation tank (2) in proportion; S6. After the Daphnia glutinosa in the Daphnia glutinosa propagation tank (2) has grown to a specified density or state, the mixed solution in the Daphnia glutinosa propagation tank (2) is added to the propagation area (401).

7. The method for propagating Daphnia hydroponica as described in claim 6, characterized in that: In step S1, the particle size sensor (14) is activated. When the particle size sensor (14) detects that the particle size of the algae is greater than a specified value, the circulation pump (15) is activated to pump the algae in the water storage tank (11) back into the overflow box (12) and use the pulverizer (13) to crush the algae a second time.

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