Modular fish and vegetable coupling planting and breeding system

Abstract

The invention relates to the technical field of ecological engineering, and provides a modular fish and vegetable coupling planting and breeding system which comprises fish breeding units. The modular cultivation unit at least comprises a first cultivation area and a second cultivation area; the water and fertilizer coupling unit comprises a controller; the primary screening module is electrically connected with the controller, the primary screening module is connected with the fish culture units, and the primary screening module is used for obtaining liquid culture tail water of the fish culture units, supplying the liquid culture tail water to the first culture area, obtaining solid culture tail water residues of the fish culture units and conveying the solid culture tail water residues to the second culture area; the problem of unbalanced nutrition in a traditional polyculture mode is solved; automatic water and fertilizer blending is achieved, efficient utilization of aquaculture tail water is ensured, and the overall synergy of a fish and vegetable symbiotic system is improved.

Description

Technical Field

[0001] The present invention relates to the field of ecological engineering technology, and in particular to a modular fish-vegetable coupling breeding system. Background Art

[0002] As a key innovation in agricultural ecological engineering, the aquaponics system achieves efficient utilization of water resources and nutrients through the cyclical linkage of fish farming and plant cultivation. However, existing substrate-based aquaponics systems suffer from a poor coupling between the cultivation and aquaculture modules in practical applications. This is because aquaculture wastewater in existing symbiotic systems is simply filtered and then uniformly supplied to the cultivation module, lacking a differentiated supply design for different crop types. Furthermore, solid fish manure is difficult to handle and can easily cause system contamination. Fish manure easily settles at the bottom of the pond, forming dead zones. This not only leads to elevated levels of ammonia nitrogen and nitrite in the aquaculture water, threatening fish health, but also requires frequent manual desilting, increasing operating costs. Furthermore, existing systems fail to effectively utilize the organic nutrients in solid fish manure and lack an efficient pathway for converting aquaculture waste into cultivation substrates, resulting in a waste of resources and an increased risk of environmental pollution. Summary of the Invention

[0003] The present invention provides a modular fish-vegetable coupled breeding system to solve the problems in the prior art of low coupling between the cultivation module and the breeding module, unbalanced nutrient supply and difficulty in handling solid fish excrement.

[0004] The present invention provides a modular fish-vegetable coupled breeding system, comprising: fish farming units; A modular cultivation unit, the modular cultivation unit comprising at least: a first cultivation area and a second cultivation area; Water and fertilizer coupling unit, including: Controller; A primary screening module is electrically connected to the controller, and the primary screening module is respectively connected to the fish farming unit, the first cultivation area and the second cultivation area. The primary screening module is used to obtain the liquid aquaculture tail water of the fish farming unit and supply it to the first cultivation area respectively, and to obtain the solid aquaculture tail water residue of the fish farming unit and transport it to the second cultivation area.

[0005] According to a modular fish-vegetable coupled farming system provided by the present invention, the primary screening module includes: a filter device, wherein an inlet end of the filter device is connected to the fish breeding unit, and a drainage port of the filter device is respectively connected to the first cultivation area; A sedimentation tank is connected to the sewage outlet of the filtering device and is used to collect solid aquaculture tail water residue and provide it to the second cultivation area.

[0006] According to a modular fish-vegetable coupled farming system provided by the present invention, the water-fertilizer coupling unit further includes: a first discharge pipeline, wherein both ends of the first discharge pipeline are respectively connected to the inlet ends of the fish breeding unit and the filtering device; a second discharge pipeline, one end of which is connected to the liquid discharge port of the filter device, and the other end of which is connected to the first cultivation area; A third discharge pipeline, one end of which is connected to the sedimentation tank, and the other end of which is connected to the second cultivation area.

[0007] According to a modular fish-vegetable coupling farming system provided by the present invention, the first discharge pipeline and the second discharge pipeline are provided with a first delivery pump, the third discharge pipeline is provided with a sludge pump, and the first delivery pump and the sludge pump are both electrically connected to the controller.

[0008] A modular fish-vegetable coupled farming system provided by the present invention further includes: A recovery unit, comprising: return pool; a first water return pipeline connected between the first cultivation area and the water return pool; A second water return pipeline is connected between the water return tank and the fish breeding unit.

[0009] According to a modular fish-vegetable coupling breeding system provided by the present invention, the first return water pipeline and the second return water pipeline are provided with a second delivery pump, and the second delivery pump is electrically connected to the controller.

[0010] According to a modular fish-vegetable coupled cultivation system provided by the present invention, the first cultivation area is a leafy vegetable area, provided with a first matrix; The second cultivation area is a fruit and vegetable area, which is provided with a second matrix. The thickness of the second matrix is ​​greater than that of the first matrix. EC sensors are embedded in both the first matrix and the second matrix. The EC sensors are electrically connected to the controller.

[0011] According to a modular fish-vegetable coupling breeding system provided by the present invention, the first matrix and the second matrix both adopt a layered structure, and both include a composite matrix layer, a perlite layer and a granular drainage layer from top to bottom.

[0012] A modular fish-vegetable coupled farming system provided by the present invention further includes: The liftable LED light group is electrically connected to the controller. The liftable LED light group is arranged above the modular cultivation unit, and the LED lights corresponding to the first cultivation area and the second cultivation area have different colors.

[0013] According to the modular fish-vegetable coupling breeding system provided by the present invention, the system further includes a CO2 concentration linkage control module, wherein the CO2 concentration linkage control module includes: The CO2 concentration sensor is electrically connected to the controller and is arranged in the first cultivation area and the second cultivation area to maintain the CO2 concentration in each cultivation area between 400-600 ppm.

[0014] The modular fish-vegetable coupling breeding system provided by the present invention improves the efficiency of water and fertilizer utilization. The aquaculture tail water is separated into solid and liquid by the primary screening module, the liquid part is directly supplied to the first cultivation area, and the solid residue is directionally transported to the second cultivation area, so as to realize precise water and fertilizer distribution and reduce waste. It is suitable for mixed planting scenarios of various crops such as leafy vegetables, fruit vegetables, etc. For example, the first cultivation area (such as the leafy vegetable area) mainly receives liquid water and fertilizer to meet the needs of shallow-rooted crops; the second cultivation area (such as the fruit vegetable area) receives solid residue as base fertilizer to meet the needs of deep-rooted crops for long-term nutrients and solve the nutritional imbalance problem in the traditional mixed breeding mode; the primary screening module is linked with the controller to realize automatic water and fertilizer allocation, ensure the efficient utilization of aquaculture tail water, and improve the overall synergy of the fish-vegetable symbiotic system; by centrally processing the solid residue generated by the fish breeding unit and using it in the second cultivation area, the blockage or water quality deterioration caused by the accumulation of fish feces in the traditional system is avoided, and the system maintenance cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 1 This is a structural block diagram of a modular fish-vegetable coupled breeding system provided by an embodiment of the present invention.

[0017] Reference numerals: 1. Fish farming unit; 2. Modular cultivation unit; 21. First cultivation area; 22. Second cultivation area; 3. Primary screening module; 4. First discharge pipeline; 5. Second discharge pipeline; 6. Third discharge pipeline; 8. Return water tank; 9. First return water pipeline; 10. Second return water pipeline. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0019] The following combination Figure 1 The present invention describes a modular fish-vegetable coupled farming system.

[0020] An embodiment of the present invention provides a modular fish-vegetable coupling breeding system, comprising: a fish breeding unit 1, a modular cultivation unit 2 and a water-fertilizer coupling unit; wherein the fish breeding unit 1 has a space size of 120 m³, and the modular cultivation unit 2 is 1100 cm long, 100 cm wide and 25 cm high; the modular cultivation unit 2 includes at least a first cultivation area 21 and a second cultivation area 22, and the second cultivation area 22 is connected to the first cultivation area 21 through a pipeline for obtaining bottom water and fertilizer in the first cultivation area 21; the water-fertilizer coupling unit includes a controller and a primary screening module 3, the primary screening module 3 is electrically connected to the controller, and the primary screening module 3 is respectively connected to the fish breeding unit 1, the first cultivation area 21 and the second cultivation area 22, the primary screening module 3 is used to obtain liquid aquaculture tail water from the fish breeding unit 1 and supply it to the first cultivation area 21, and to obtain solid aquaculture tail water residue from the fish breeding unit 1 and transport it to the second cultivation area 22.

[0021] It can be seen from the above scheme that the present invention improves the efficiency of water and fertilizer utilization. The aquaculture tail water is separated into solid and liquid by the primary screening module 3. The liquid part is directly supplied to the two cultivation areas, and the solid residue is directionally transported to the second cultivation area 22, so as to achieve precise water and fertilizer distribution and reduce waste. It is suitable for mixed planting scenarios of various crops such as leafy vegetables, fruit vegetables, etc. For example, the first cultivation area 21 (such as the leafy vegetable area) mainly receives liquid water and fertilizer to meet the needs of shallow-rooted crops; the second cultivation area 22 (such as the fruit vegetable area) receives solid residue as base fertilizer to meet the needs of deep-rooted crops for long-term nutrients and solve the nutritional imbalance problem in the traditional mixed breeding mode; the primary screening module 3 is linked with the controller to realize automatic water and fertilizer allocation, ensure the efficient utilization of aquaculture tail water, and improve the overall synergy of the fish-vegetable symbiotic system; by centrally processing the solid residue generated by the fish breeding unit 1 and using it in the second cultivation area 22, the blockage or water quality deterioration caused by the accumulation of fish feces in the traditional system is avoided, and the system maintenance cost is reduced.

[0022] In some specific embodiments, the first cultivation area 21 is a leafy vegetable area, which is provided with a first matrix, and the second cultivation area 22 is a fruit and vegetable area, which is provided with a second matrix. When the system is working, the leafy vegetable area can preferentially obtain low-concentration water and fertilizer after initial screening, such as an EC value of 1.2-1.8ms / cm, to meet the needs of shallow-rooted crops; the fruit and vegetable area receives high-concentration water and fertilizer (EC value is above 2.0ms / cm) through pipelines, which is adapted to the high nutrient demand of deep-rooted crops.

[0023] It should be noted that the number of cultivation areas can be increased or decreased according to demand, such as adding a third cultivation area, to achieve gradient utilization of water and fertilizer and multi-level absorption, thereby reducing system pollution.

[0024] In this embodiment, the fish farming unit 1 may include multiple parallel farming ponds. Parallel means that multiple farming ponds are connected in "parallel" (not in series) in the water system, that is, each farming pond has independent water intake and drainage, and parameters such as water quality can be individually adjusted.

[0025] Optionally, a conical sewage collecting device is provided at the bottom of the breeding pond, which may be a conical structure provided at the bottom of the breeding pond. The principles of hydrodynamics such as centripetal water flow are used to gather solid wastes such as fish feces and leftover bait to the bottom of the conical structure, thereby avoiding the sedimentation dead corners of the traditional flat pond bottom and solving the problems of increased ammonia nitrogen and decreased dissolved oxygen in the breeding water due to the accumulation of solid waste. The wastes are initially collected by the conical sewage collecting device and then discharged into the primary screening module 3 through a pipeline, and transported to the substrate of the cultivation area as base fertilizer, thereby providing organic nutrients for the growth of vegetables.

[0026] In this embodiment, each aquaculture pond is equipped with a water quality monitoring terminal to obtain real-time data on the water temperature, dissolved oxygen, and EC value of the aquaculture pond. This data is used to adjust the water circulation volume and oxygen supply equipment to maintain the dissolved oxygen level ≥ 5 mg / L. The EC value (Electric Conductivity) is the electrical conductivity that reflects the ion concentration (salt content) in the solution. In the fish-vegetable symbiotic system, it is used to characterize the nutrient concentration of the nutrient solution. The water quality monitoring terminal is a product in the prior art. Its structure and principle are not the focus of this article and will not be discussed here.

[0027] In some embodiments, the primary screening module 3 includes: a filtering device and a sedimentation tank. The inlet end of the filtering device is connected to the fish farming unit 1, and is used to filter the aquaculture tail water to achieve solid-liquid separation. The discharge port of the filtering device is connected to the first cultivation area 21; the sedimentation tank is connected to the sewage outlet of the filtering device, and is used to collect solid aquaculture tail water residue and provide it to the second cultivation area 22.

[0028] Specifically, filtered liquid water is simultaneously delivered to the first cultivation area 21 (leafy vegetables) and the second cultivation area 22 (fruit and vegetable areas). Flow control valves provide differentiated water supply. For example, capillary irrigation is used in the first cultivation area 21 (leafy vegetables), while pulse drip irrigation is used in the second cultivation area 22 (fruit and vegetable areas). This ensures that the EC values ​​of the two areas are maintained at 1.2-1.8ms / cm and 2.0-3.0ms / cm, respectively, addressing the nutrient imbalance caused by traditional uniform irrigation. The sewage outlet of the filtration device discharges the intercepted solid fish feces and leftover bait into a sedimentation tank. Gravity settling is used to increase the concentration of the solid residue, facilitating subsequent resource utilization.

[0029] With this arrangement, filtering devices such as screens and microfilters can separate aquaculture tail water into liquid water and solid residues. The sedimentation tank further precipitates fine particles, reducing the negative impact of suspended matter on the substrate of the second cultivation area 22 and extending the service life of the second substrate. After solid residues (such as fish feces and leftover bait) are enriched in the sedimentation tank, they are directly supplied to the second cultivation area 22 (fruits and vegetables) as organic base fertilizer, giving full play to their slow-release fertilizer effect and reducing the addition of external fertilizers. The coordinated design of the filtering device and the sedimentation tank can cope with high-load suspended matter in the aquaculture tail water, reduce the risk of equipment blockage, and reduce the frequency of manual cleaning. In addition, the filtering device and the sedimentation tank can be maintained or upgraded independently. In this embodiment, the water-fertilizer coupling unit also includes: a first discharge pipeline 4, a second discharge pipeline 5 and a third discharge pipeline 6, the two ends of the first discharge pipeline 4 are respectively connected to the fish farming unit 1 and the inlet end of the filtering device; one end of the second discharge pipeline 5 is connected to the discharge port of the filtering device, and the other end of the second discharge pipeline 5 is connected to the first cultivation area 21; one end of the third discharge pipeline 6 is connected to the sedimentation tank, and the other end of the third discharge pipeline 6 is connected to the second cultivation area 22.

[0030] Optionally, the first discharge pipeline 4 and the second discharge pipeline 5 are provided with a first delivery pump, the third discharge pipeline 6 is provided with a sludge pump, and the first delivery pump and the sludge pump are both electrically connected to the controller.

[0031] Specifically, the breeding unit is connected to the filtration device through the first discharge pipeline 4, and the breeding tail water is introduced into the primary screening system to complete solid-liquid separation. The second discharge pipeline 5 transports the filtered liquid water to the first cultivation area 21 (such as the leafy vegetable area), supporting capillary irrigation. The inner diameter of the capillary irrigation pipe is 2-3mm and the spacing is 10-15cm. Continuous low-flow water supply maintains an EC value of 1.2-1.8ms / cm.

[0032] The third discharge pipeline 6 connects the sedimentation tank with the second cultivation area 22, and transports the concentrated solid fish manure residue to the substrate layer of the fruit and vegetable area in the form of base fertilizer, reducing the use of chemical fertilizers. The residue can be transported by a spiral propulsion pump, which is matched with the electromagnetic valve in the pipeline to automatically adjust the amount of fertilizer according to the EC value of the cultivation area and the crop growth period. For example, during the tomato fruiting period, the fertilizer is transported once a week at 5kg / m2 each time.

[0033] In this embodiment, the thickness of the second matrix is ​​greater than that of the first matrix. The thickness of the first matrix is ​​7-9 cm, which is suitable for lettuce and spinach (shallow roots); the thickness of the second matrix is ​​18-22 cm, which is suitable for the growth needs of tomatoes and cucumbers (deep roots); and EC sensors are embedded in both the first matrix and the second matrix, and the EC sensors are electrically connected to the controller; the irrigation strategy is adjusted based on EC value feedback, and the EC value of the matrix in the leafy vegetable area is maintained at 1.2-1.8ms / cm; the EC value of the matrix in the fruit and vegetable area is maintained at 2.0-3.0ms / cm.

[0034] Specifically, leafy vegetable areas have shallow roots and require lower EC values; excessively high values ​​can easily burn the roots. Fruit and vegetable areas have deep roots and require large amounts of nutrients, requiring higher EC values, especially during the fruiting period. The controller dynamically adjusts the frequency and duration of irrigation based on the deviation between the real-time monitored EC value and the target threshold. Each cultivation area is equipped with at least two embedded EC sensors to monitor the substrate conductivity in real time, with a sampling frequency of ≥1 time / hour, and transmits the data to the controller. For example, in the leafy vegetable area, when the EC value is less than the target threshold, the supply of aquaculture tail water is increased; when the EC value is greater than the target threshold, the supply of aquaculture tail water is reduced until the EC value returns to normal. In the fruit and vegetable area, when the EC value is less than the target threshold, the duration of pulse drip irrigation is extended from 5 minutes to 8 minutes. The target EC thresholds for different cultivation areas are automatically updated according to the crop growth stage (such as seedling stage, flowering stage, and fruiting stage).

[0035] Preferably, both the first and second substrates are layered, consisting of a composite substrate layer, a perlite layer, and a granular drainage layer, inoculated with EM inoculant. Specifically, the composite substrate layer consists of 60% peat, 37%-20% biochar, and 3%-20% perlite. The composite substrate layer has a porosity of 45%, providing nutrient absorption and root support. The perlite layer is 2 cm thick and provides insulation and water retention. The granular drainage layer contains zeolite granules with a diameter of 50-80 mm and a thickness of 3-15 cm. Only the first substrate is used to collect permeated water and return it to the fish culture unit 1.

[0036] In this embodiment, a recovery unit is also included, which includes: a return water tank 8, a first return water pipeline 9 and a second return water pipeline 10. The first return water pipeline 9 is connected between the first cultivation area 21 and the return water tank 8; the second return water pipeline 10 is connected between the return water tank 8 and the fish breeding unit 1. The first return water pipeline 9 and the second return water pipeline 10 are provided with a second delivery pump, and the second delivery pump is electrically connected to the controller.

[0037] This arrangement achieves a closed-loop water circulation and reduces water waste. The first cultivation area 21 (leafy vegetables) is collected and concentrated by the return water tank 8. After sedimentation or filtration, it is re-transported to the fish farming unit 1 through the second return water pipeline 10, realizing efficient reuse of the water body. The linkage design of the controller + second delivery pump can dynamically adjust the return water flow according to the farming requirements such as dissolved oxygen and EC value, avoiding the problems of return water pollution or insufficient dissolved oxygen in the traditional system; the return water tank 8 acts as a buffer unit to balance the water volume fluctuations of the cultivation module and the farming module, and prevent abnormal water level in the system.

[0038] This embodiment also includes a liftable LED light assembly electrically connected to the controller. This liftable LED light assembly is positioned above the modular cultivation unit 2, and the LED lights corresponding to the first cultivation area 21 and the second cultivation area 22 have different colors. For example, the first cultivation area 21 (leafy vegetables) has a 40% blue light component (wavelength 430-450nm), promoting chlorophyll synthesis and lateral growth; the second cultivation area 22 (fruit and vegetable area) has a 60% red light component (wavelength 650-660nm), accelerating flower bud differentiation and fruit development. This solution breaks through the limitations of traditional single-spectrum illumination by dynamically adjusting the light quality ratio based on crop type and growth stage, thereby improving photosynthetic efficiency.

[0039] Furthermore, the lifting range of the liftable LED light group is 50-150cm. During the growth period of leafy vegetables, the height is maintained at 100-120cm, and the light intensity is 200-300μmol / m²・s to avoid strong light burns on the leaves; during the fruiting period of fruits and vegetables, the height is reduced to 80-100cm, and the light intensity is increased to 300-400μmol / m²・s to promote the accumulation of sugar in the fruits.

[0040] In this embodiment, a CO2 concentration linkage control module is also included. The CO2 concentration linkage control module includes: a CO2 concentration sensor. The CO2 concentration sensor is electrically connected to the controller. The CO2 concentration sensor is arranged in the first cultivation area 21 and the second cultivation area 22 to monitor the CO2 concentration in the cultivation area in real time and maintain the CO2 concentration in each cultivation area between 400-600ppm.

[0041] Specifically, the CO2 concentration sensor installed in the modular cultivation unit 2 monitors the gas concentration in the cultivation area in real time and transmits it to the controller synchronously with a sampling frequency of ≥1 time / 10min. When the CO2 concentration is less than 400ppm, the controller can trigger the following linkage mechanism: start the external CO2 gas supply device, and the gas source comes from the air above the breeding pond or an external gas cylinder; when the CO2 concentration is between 400-600ppm, adjust the light intensity of the liftable LED lamp group to the optimal range for crop photosynthesis; if the CO2 concentration exceeds 600ppm, stop supplying gas.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A modular fish-vegetable coupled farming system, characterized in that: include: Fish farming unit (1); A modular cultivation unit (2), the modular cultivation unit (2) comprising at least: a first cultivation area (21) and a second cultivation area (22); Water and fertilizer coupling unit, including: Controller; A primary screening module (3) is electrically connected to the controller. The primary screening module (3) is respectively connected to the fish farming unit (1), the first cultivation area (21), and the second cultivation area (22). The primary screening module (3) is used to obtain liquid aquaculture tail water from the fish farming unit (1) and supply it to the first cultivation area (21), and to obtain solid aquaculture tail water residue from the fish farming unit (1) and transport it to the second cultivation area (22).

2. The modular fish-vegetable coupled farming system according to claim 1, characterized in that: The primary screening module (3) comprises: A filter device, wherein the inlet end of the filter device is connected to the fish farming unit (1), and the drainage port of the filter device is respectively connected to the first cultivation area (21) and the second cultivation area (22); A sedimentation tank is connected to the sewage outlet of the filtering device and is used to collect solid aquaculture tail water residue and provide it to the second cultivation area (22).

3. The modular fish-vegetable coupled farming system according to claim 2, characterized in that: The water-fertilizer coupling unit also includes: a first discharge pipeline (4), wherein both ends of the first discharge pipeline (4) are respectively connected to the fish farming unit (1) and the inlet end of the filtering device; a second discharge pipeline (5), one end of the second discharge pipeline (5) being connected to the liquid discharge port of the filter device, and the other end of the second discharge pipeline (5) being connected to the first cultivation area (21); A third discharge pipeline (6), one end of the third discharge pipeline (6) is connected to the sedimentation tank, and the other end of the third discharge pipeline (6) is connected to the second cultivation area (22).

4. The modular fish-vegetable coupled farming system according to claim 3, characterized in that: The first discharge pipeline (4) and the second discharge pipeline (5) are provided with a first delivery pump, the third discharge pipeline (6) is provided with a sludge pump, and the first delivery pump and the sludge pump are both electrically connected to the controller.

5. The modular fish-vegetable coupled farming system according to claim 1, characterized in that: Also includes: A recovery unit, comprising: Return pool (8); a first water return pipeline (9), the first water return pipeline (9) being connected between the first cultivation area (21) and the water return pool (8); A second water return pipeline (10), the second water return pipeline (10) is connected between the water return tank (8) and the fish breeding unit (1).

6. The modular fish-vegetable coupled farming system according to claim 5, characterized in that: The first water return pipeline (9) and the second water return pipeline (10) are provided with a second delivery pump, and the second delivery pump is electrically connected to the controller.

7. The modular fish-vegetable coupled farming system according to claim 1, characterized in that: The first cultivation area (21) is a leafy vegetable area and is provided with a first matrix; The second cultivation area (22) is a fruit and vegetable area, and is provided with a second matrix, the thickness of the second matrix is ​​greater than the thickness of the first matrix, and EC sensors are embedded in both the first matrix and the second matrix, and the EC sensors are electrically connected to the controller.

8. The modular fish-vegetable coupled farming system according to claim 7, characterized in that: The first matrix and the second matrix both adopt a layered structure, and both include a composite matrix layer, a perlite layer and a granular drainage layer from top to bottom.

9. The modular fish-vegetable coupled farming system according to claim 1, characterized in that: Also includes: A liftable LED light group is electrically connected to the controller, the liftable LED light group is arranged above the modular cultivation unit (2), and the LED lights corresponding to the first cultivation area (21) and the second cultivation area (22) have different colors.

10. The modular fish-vegetable coupled farming system according to claim 1, characterized in that: It also includes a CO2 concentration linkage control module, which includes: A CO2 concentration sensor is electrically connected to the controller. The CO2 concentration sensor is arranged in the first cultivation area (21) and the second cultivation area (22) and is used to maintain the CO2 concentration in each cultivation area between 400-600 ppm.

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