A soilless culture breeding acceleration device based on ultrasonic wave cooperation with coarse coconut dregs substrate

Abstract

The utility model discloses a kind of based on ultrasonic wave cooperates coarse coconut bran matrix's soilless cultivation breeding acceleration device, comprising: matrix processing unit, ultrasonic atomization system and intelligent control unit.In matrix processing unit, coarse coconut bran is formed after layer structure by steam puffing, pyroligneous acid modification, probiotic solidification, bottom layer is coconut shell charcoal particle, middle layer is modified coarse coconut bran matrix, surface layer is carbonized rice hull.Ultrasonic atomization system is composed of three-dimensional spiral flow guide pipe around matrix, high-frequency piezoelectric ceramic atomization piece group and nano bubble generating device.Intelligent control unit can dynamically adjust ultrasonic frequency and working mode, simulate day-night rhythm to adjust ultrasonic and illumination.By optimizing matrix structure and ultrasonic atomization technology, nutrient solution is evenly covered root system with micron grade fog particle, while nano bubble promotes dissolved oxygen concentration, solve the problem that traditional fog culture droplet particle size is big, root system is insufficient in oxygen supply.

Description

Technical Field

[0001] This utility model relates to the field of soilless cultivation technology, and in particular to a soilless cultivation and breeding acceleration device based on ultrasonic synergy with coarse coconut coir substrate. Background Technology

[0002] Soilless cultivation technology, with its advantages of efficient space utilization, reduced pests and diseases, and controllable environment, has gradually become an important development direction in modern agriculture. Especially in the field of rapid breeding, soilless cultivation systems combined with environmental control technology can significantly shorten the crop growth cycle and accelerate the process of new variety selection. However, traditional soilless cultivation technology still faces many bottlenecks, such as unstable physicochemical properties of substrate materials, low nutrient solution circulation efficiency, and insufficient root oxygen supply. These problems restrict the breeding efficiency of crops, especially short-cycle crops such as Solanaceae and Brassicaceae.

[0003] Among current mainstream technologies, aeroponic systems are widely used due to their ability to directly deliver nutrient solution to the roots. However, their droplet size is relatively large, resulting in rapid droplet settling and uneven distribution on the root surface. Furthermore, large droplets have difficulty penetrating the seed coat or young root epidermis, affecting embryo development and nutrient absorption efficiency. In addition, traditional substrates such as rock wool and perlite, while possessing certain water retention properties, suffer from problems such as pH imbalance and non-degradability. Long-term use can lead to salt accumulation and environmental pollution.

[0004] Existing technology CN218680891U describes a self-rotating three-dimensional soilless cultivation device, comprising: a cultivation component and a cultivation base; the cultivation component includes a cultivation frame, within which are vertically arranged spray spaces and a storage cavity, and a water pump module is installed in the storage cavity; the cultivation frame is located above the cultivation base and rotates relative to the cultivation base; the cultivation base is equipped with a drive mechanism for driving the cultivation frame to rotate; this invention improves light uniformity through a three-dimensional rotating structure, but it still relies on the traditional nutrient solution spraying mode and cannot solve core problems such as root microenvironment optimization and accelerated physiological metabolism.

[0005] Therefore, it is necessary to improve an existing soilless cultivation acceleration device based on ultrasonic synergistic coarse coconut coir substrate to solve the above problems. Summary of the Invention

[0006] This invention overcomes the shortcomings of the prior art and provides a soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate, aiming to solve the problems of excessively large droplet size and insufficient substrate material performance in the existing aeroponic system.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate, comprising: a substrate treatment unit, an ultrasonic atomization system, and an intelligent control unit.

[0008] The matrix treatment unit is equipped with a coarse coconut coir pretreatment module; the matrix has a layered filling structure, which includes, from bottom to top: a bottom layer of coconut shell carbon particles, a middle layer of modified coarse coconut coir matrix, and a surface layer of carbonized rice husk.

[0009] The ultrasonic atomization system includes: a three-dimensional spiral guide channel spirally surrounding the matrix, a high-frequency piezoelectric ceramic atomizing sheet group disposed at the inlet of the three-dimensional spiral guide channel, and a nanobubble generator disposed at the outlet of the three-dimensional spiral guide channel.

[0010] The intelligent control unit includes an ultrasonic intensity adaptive adjustment module and a pulse sequence control module, and is connected to the sensor group set in the matrix processing unit.

[0011] In a preferred embodiment of this invention, the bottom layer of coconut shell charcoal particles has a thickness of 2-3 cm and a particle size range of 0.5-2 mm; the middle layer of modified coarse coconut coir matrix has a thickness of 5 cm, a particle size range of 2-5 mm, a porosity ≥75%, and a pore size distribution of 50-200 μm; the surface layer of carbonized rice husk has a thickness of 1 cm, a particle size range of 1-3 mm, and a carbonization temperature ≥500℃.

[0012] In a preferred embodiment of this utility model, the three-dimensional spiral guide pipe has an outer diameter of 5-10cm, an inner diameter of 3-8cm, 3-6 spiral turns, and a total length of 1-3m; the outlet end of the three-dimensional spiral guide pipe is connected to the nanobubble generator through a flange, and an O-ring is provided at the connection.

[0013] In a preferred embodiment of this invention, the high-frequency piezoelectric ceramic atomizing sheet assembly comprises two or more CT28-2050 type piezoelectric ceramic atomizing sheets connected in parallel, with a resonant frequency of 1.7-2MHz and a single-sheet power density of 0.3W / cm². 2 .

[0014] In a preferred embodiment of the present invention, the ultrasonic atomization system is connected to a nutrient solution circulation system, the nutrient solution circulation system comprising: a nutrient solution storage tank, a supply pipeline and a return pipeline connected to the nutrient solution storage tank, and a circulation pump installed on the return pipeline.

[0015] In a preferred embodiment of this utility model, the high-frequency piezoelectric ceramic atomizing plate assembly is connected to the supply pipeline via a silicone hose, the inner diameter of the hose being interference-fitted with the outer diameter of the atomizing plate, with a fit clearance of 0.1-0.2 mm.

[0016] In a preferred embodiment of this invention, the nanobubble generator includes a microporous titanium alloy nozzle with a nozzle diameter of 50-100 μm and a nozzle density of 80-120 holes / cm². 2The device operates at a pressure of 0.5-0.8 MPa, produces oxygen bubbles with a diameter of <200 nm, and generates a nutrient solution with a dissolved oxygen concentration of ≥8 mg / L.

[0017] In a preferred embodiment of this utility model, the liquid storage tank has a volume of 50-100L, the circulation pump has an adjustable flow rate of 5-15L / min and a head of 1.5-2.5m, and the return pipeline is equipped with an online filter with a filter screen pore size of 20-50μm.

[0018] In a preferred embodiment of this utility model, the inlet end of the three-dimensional spiral guide pipe is provided with a Venturi effect acceleration structure, with a cone angle of 15-20° in the contraction section and a cone angle of 5-8° in the expansion section.

[0019] In a preferred embodiment of this utility model, the sensor group includes: a substrate humidity sensor, a dissolved oxygen sensor, and a root temperature sensor, which communicate via an RS485 bus.

[0020] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0021] (1) This utility model combines steam expansion, wood acetic acid modification, and probiotic solidification treatment in the coarse coconut coir pretreatment module within the substrate treatment unit with a layered substrate filling structure. First, steam expansion loosens the coconut coir fibers, increases porosity, and kills pathogens. Wood acetic acid modification enhances ion exchange capacity, stabilizes rhizosphere pH, and adsorbs and releases nutrient ions. Probiotic solidification forms a biofilm to stabilize the microecology. In the layered structure, the bottom layer of coconut shell carbon particles adsorbs heavy metal ions to adjust pH, the middle layer of modified coarse coconut coir substrate has multi-level pores that match the ultrasonic wavelength to prolong the residence of mist particles, and the surface layer of carbonized rice husk enhances air permeability and inhibits algae. This provides crop roots with a stable physicochemical environment, good water retention and air permeability, and a stable microecology, solving the problems of pH imbalance, non-degradability, and insufficient performance of traditional substrates such as rock wool and perlite. Furthermore, the combination with ultrasound optimizes the residence time of mist particles in the substrate, further achieving the effect of optimizing the root growth environment and promoting healthy root development compared with existing technologies.

[0022] (2) This invention optimizes nutrient solution delivery efficiency through the synergistic effect of the high-frequency piezoelectric ceramic atomizing plate assembly, the three-dimensional spiral guide pipe, and the nanobubble generator in the ultrasonic atomization system. The high-frequency piezoelectric ceramic atomizing plate assembly atomizes the nutrient solution into micron-sized droplets of 5-15 μm, which are much smaller than those in traditional aeroponic systems and can penetrate the seed coat and root epidermis to promote embryo development. The three-dimensional spiral guide pipe incorporates a Venturi effect acceleration structure, which prolongs the residence time of the droplets and improves the uniformity of distribution. The nanobubble generator injects oxygen bubbles with a diameter of <200 nm, increasing the dissolved oxygen concentration of the nutrient solution to ≥8 mg / L, resulting in high root oxygen exchange efficiency, improved oxygen utilization, and extended continuous oxygen supply time. Compared with existing technologies, this invention further improves nutrient solution delivery efficiency and root oxygen supply.

[0023] (3) This invention achieves precise regulation of crop physiological metabolism through the combined use of an adaptive ultrasonic intensity adjustment module and a pulse sequence control module in the intelligent control unit. The adaptive ultrasonic intensity adjustment module dynamically adjusts the ultrasonic mode according to the crop growth stage, with different frequencies and working modes of ultrasound corresponding to different stages; the pulse sequence control module simulates the diurnal rhythm to synchronously adjust the ultrasonic frequency and photoperiod, optimizing the synthesis and metabolism of endogenous hormones in plants. Sensors on the substrate monitor and provide feedback data in real time, and the intelligent control unit automatically adjusts the ultrasonic frequency, atomization intensity, and nutrient solution ratio accordingly to ensure that the root microenvironment is in the optimal state. Compared with the prior art, this invention further achieves the effect of shortening the breeding cycle and improving breeding efficiency. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0025] Figure 1 This is a matrix structure diagram of a preferred embodiment of the present invention;

[0026] Figure 2 This is a circulation diagram of the nutrient solution according to a preferred embodiment of the present invention. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0028] Application Overview:

[0029] Existing soilless cultivation techniques suffer from the following major drawbacks: 1. The droplet size in aeroponic systems is too large. Traditional atomizing devices typically produce droplets larger than 50μm, causing the droplets to settle rapidly in the air and failing to effectively penetrate the seed coat or root system, thus limiting embryonic development. Furthermore, large droplets easily form runoff on the substrate surface, wasting nutrient solution and resulting in low root oxygen exchange efficiency, easily leading to hypoxia and root rot. 2. Inadequate substrate material performance. Substrates such as rock wool and perlite suffer from poor pH stability and non-degradability. Rock wool, due to its simple fiber structure and weak ion buffering capacity, easily leads to rhizosphere acidification after long-term use. Perlite has uneven pore distribution, making it difficult to balance water retention and air permeability, affecting the simultaneous absorption of water and oxygen by the roots. 3. Long breeding cycle. Conventional soilless cultivation systems lack active means to regulate crop physiological metabolism. Although existing technologies accelerate growth through environmental control, they do not optimize the root microenvironment and nutrient absorption efficiency, resulting in limited improvement in metabolic rate.

[0030] Therefore, this application proposes a soilless cultivation and breeding acceleration device based on ultrasonic synergy with coarse coconut coir substrate. By optimizing the substrate structure and synergizing with multiple physical fields, it shortens the breeding cycle and improves breeding efficiency, and is suitable for rapid breeding scenarios of crops such as Solanaceae and Brassicaceae.

[0031] Exemplary device:

[0032] A soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate includes: a substrate treatment unit, an ultrasonic atomization system, and an intelligent control unit;

[0033] The substrate treatment unit is used to provide a stable root growth environment; the substrate treatment unit is equipped with a coarse coconut coir pretreatment module, which is used to modify the coarse coconut coir to enhance its porosity and ion buffering capacity. The treatment steps are steam expansion, wood acetic acid modification, and probiotic solidification in three stages; the coarse coconut coir particle size is 2-5mm.

[0034] First, the coarse coconut coir is steam-expanded, and then subjected to high-temperature steam treatment in the steam expansion chamber. The high-temperature steam treatment temperature is 120-150℃, the steam pressure is 0.2-0.4MPa, and the treatment time is 30-60 minutes. The high-temperature steam softens the lignin in the coconut coir fiber, expands and loosens the fiber structure, increases the porosity, and the high temperature can also kill the pathogens remaining in the coconut coir.

[0035] Crude coconut coir was soaked in a wood acetic acid modification reaction tank with a wood acetic acid solution concentration of 5%-8% and a pH value of 2.5-3.5. This process enhanced its ion exchange capacity through hydroxylation. The phenolic hydroxyl groups (—OH) in the wood acetic acid chemically bonded to the carboxyl groups (—COOH) on the surface of the coconut coir fibers, forming a stable slow-release carrier structure. The modified coconut coir exhibited increased cation exchange capacity, effectively adsorbing and slowly releasing potassium.+ Ca 2+ With the addition of nutrient ions, modified coconut coir can stabilize the rhizosphere pH at 6.0-6.8, avoiding the risk of acidification in rock wool substrates;

[0036] Probiotics, including nitrogen-fixing and phosphate-solubilizing bacteria, are inoculated into coarse coconut coir in a probiotic solidification chamber to form a biofilm that stabilizes the substrate microecology. Acid-resistant strains, such as Azotobacter chroococcum, are used to adapt to the acidic environment of the coconut coir substrate. Highly efficient phosphate-solubilizing bacteria, such as Bacillus megaterium, are used to convert insoluble phosphorus into an absorbable form. The solidification conditions are: temperature 25-30℃, humidity 60%-70%, and aerobic incubation for 48-72 hours to form a microbial biofilm.

[0037] like Figure 1 As shown, the substrate has a layered filling structure: the bottom layer is coconut shell charcoal particles, laid at the bottom of the device, used to adsorb heavy metal ions and adjust the rhizosphere pH to 6.0-6.5. The bottom layer is 2-3 cm thick and the particle size ranges from 0.5-2 mm. The middle layer is modified coarse coconut coir substrate, 5 cm thick, with a particle size range of 2-5 mm and a porosity ≥75%. The modified coarse coconut coir has multi-level pores with a pore size of 50-200 μm, covering the bottom layer. The multi-level pores match the ultrasonic wavelength, prolonging the residence time of the mist particles. The top layer is carbonized rice husk, 1 cm thick, with a particle size range of 1-3 mm and a carbonization temperature ≥500℃. It is located at the top layer, enhancing air permeability and inhibiting the growth of surface algae.

[0038] The ultrasonic atomization system is used to generate ultrafine mist particles and optimize the nutrient solution delivery efficiency. The ultrasonic atomization system is connected to the nutrient solution circulation system, which includes: a nutrient solution storage tank, a supply pipeline and a return pipeline connected to the nutrient solution storage tank, and a circulation pump installed on the return pipeline; the storage tank has a volume of 50-100L, the circulation pump has an adjustable flow rate of 5-15L / min, a head of 1.5-2.5m, and the return pipeline is equipped with an online filter with a filter screen pore size of 20-50μm;

[0039] The ultrasonic atomization system includes: a three-dimensional spiral guide channel that spirals around the periphery of the matrix, a high-frequency piezoelectric ceramic atomizing sheet group set at the inlet of the three-dimensional spiral guide channel, and a nanobubble generator set at the outlet of the three-dimensional spiral guide channel;

[0040] The high-frequency piezoelectric ceramic atomizing sheet mainly consists of piezoelectric ceramic material, electrodes, and a shell. When a high-frequency alternating voltage is applied to the electrodes, the piezoelectric ceramic material undergoes mechanical vibration, atomizing the liquid in contact with it into tiny particles. Several piezoelectric ceramic atomizing sheets are connected to form a high-frequency piezoelectric ceramic atomizing sheet group. Preferably, two or more piezoelectric ceramic atomizing sheets of model CT28-2050 can be used in parallel, with an outer diameter of 28mm, an inner diameter of 8mm, a thickness of 2mm, a resonant frequency of 1.7-2MHz, and a power density of 0.3W / cm². 2 The high-frequency piezoelectric ceramic atomizing plate assembly is connected to the supply pipeline via a silicone hose. The inner diameter of the hose is interference-fitted with the outer diameter of the atomizing plate, with a clearance of 0.1-0.2mm.

[0041] The high-frequency piezoelectric ceramic atomizing plate assembly is located at the inlet end of the three-dimensional spiral guide pipe and connected to the supply pipeline. It atomizes the nutrient solution into micron-sized mist particles of 5-15μm through high-frequency vibration, with a vibration frequency of 1.7MHz±5% and a power density of 0.3W / cm³. 2 It provides initial atomization power. The atomized particles are much smaller than those in traditional aeroponic systems (above 50μm), allowing them to penetrate the seed coat and root epidermis, directly promoting embryo development; the cavitation effect generated by high-frequency vibration can activate gibberellin precursors in the nutrient solution, enhancing the activity of endogenous plant hormones.

[0042] The inlet end of the three-dimensional spiral guide pipe is directly connected to the high-frequency piezoelectric ceramic atomizing plate assembly to receive the atomized droplets. The three-dimensional spiral guide pipe incorporates a Venturi effect acceleration structure, with a cone angle of 15-20° in the contraction section and 5-8° in the expansion section. It utilizes the airflow contraction-expansion principle to accelerate the flow of mist particles. The Venturi effect acceleration structure is designed at the inlet end of the three-dimensional spiral guide pipe. The inlet end structure is a gradually contracting pipe section followed by a gradually expanding pipe section, forming a throat shape. When the fluid passes through this throat, the flow velocity increases due to the change in cross-sectional area. According to Bernoulli's equation, the fluid pressure decreases, thus producing an acceleration and pressurization effect. The three-dimensional spiral guide pipe is arranged in a spiral shape around the periphery of the matrix treatment unit, extending to the top of the matrix layer at the end, ensuring uniform coverage of mist particles from top to bottom. The three-dimensional spiral guide pipe extends the residence time of mist particles through the spiral path, and combined with the Venturi effect, improves the uniformity of mist particle distribution and avoids local accumulation. The three-dimensional spiral guide pipe has an outer diameter of 5-10cm, an inner diameter of 3-8cm, 3-6 spiral turns, and a total length of 1-3m.

[0043] The nanobubble generator is located at the outlet of the three-dimensional spiral guide pipe, connected via a flange with an O-ring seal at the connection. The nanobubble generator utilizes high-pressure jet technology, expelling air through a microporous titanium alloy nozzle with a nozzle diameter of 50-100 μm and a nozzle density of 80-120 holes / cm³. 2The working pressure is 0.5-0.8MPa. Oxygen bubbles with a diameter of <200nm are injected into the atomizing liquid to make the dissolved oxygen concentration of the nutrient solution ≥8mg / L, thereby improving the root oxygen exchange efficiency. The nanobubbles can penetrate the root epidermis and directly participate in mitochondrial aerobic respiration, thus improving oxygen utilization. The nanobubbles slowly break down in the matrix pores, extending the continuous oxygen supply time and avoiding root hypoxia.

[0044] like Figure 2 As shown, the nutrient solution is transported to the high-frequency piezoelectric ceramic atomizing plate group by the circulation pump, and atomized into micron-sized particles. The atomized droplets enter the three-dimensional spiral guide pipe, are accelerated by Venturi and then diffused evenly. They are then oxygenated by the nano bubble generator. The high-pressure oxygen flow mixes with the atomized liquid and enters the matrix. The unadsorbed mist particles settle to the bottom by gravity and flow back to the nutrient solution storage tank, re-entering the circulation system to complete the closed loop.

[0045] The intelligent control unit includes: an adaptive ultrasonic intensity adjustment module and a pulse sequence control module;

[0046] The ultrasonic intensity adaptive adjustment module dynamically adjusts the ultrasonic mode according to the crop growth stage:

[0047] The ultrasonic intensity adaptive adjustment module includes: an STM32 series microcontroller, a signal generator, and a power amplifier. The STM32 series microcontroller determines the current growth stage of the crop (germination stage, vegetative growth stage, reproductive growth stage) based on the crop growth stage and sensor feedback signals, and generates corresponding control commands. The control commands are output to the high-frequency piezoelectric ceramic atomizing plate assembly via a signal generator such as DG1022U, providing drive signals of the corresponding frequency and mode. The drive signals are amplified to sufficient power by a power amplifier such as EA-PS 3010 to drive the high-frequency piezoelectric ceramic atomizing plate assembly to operate at the corresponding power density.

[0048] Germination period: Low-frequency continuous wave, frequency 50-100kHz, intermittent mode 3s on / 5s off, to promote seed imbibition and radicle germination;

[0049] Vegetative growth stage: Medium-frequency pulse wave, frequency 150-200kHz, pulse width 10ms, to accelerate cell division and stem and leaf expansion;

[0050] Reproductive growth period: High-frequency modulated wave, frequency 1.5-1.7MHz, amplitude ±10%, induces flower bud differentiation and promotes gibberellin activity.

[0051] The pulse sequence regulation module simulates the diurnal rhythm based on the light control unit, synchronously adjusts the ultrasonic frequency and light cycle, optimizes the synthesis and metabolism of endogenous hormones in plants, and achieves a light cycle control accuracy of ±15 min / d.

[0052] The illumination control unit includes: an illumination sensor and LED lights;

[0053] The pulse sequence control module includes: an STM32 series microcontroller, a light cycle controller, and a pulse sequence signal generator. The STM32 series microcontroller receives light sensor data from the light control unit and generates pulse sequence control signals according to a preset circadian rhythm pattern, controlling the pulse sequence signal generator to generate corresponding pulse sequence signals. The microcontroller collects data from the ambient light sensor and monitors whether the actual light intensity and cycle match the preset values. If there is a deviation, the pulse sequence signal adjusts the brightness of the LED group through the light cycle controller, precisely controlling the on and off times of the light to ensure that the light cycle meets the preset circadian rhythm requirements.

[0054] The microcontroller generates corresponding pulse sequence signals based on preset circadian rhythms and light cycles. These signals are used to control the operation of the lighting equipment and to coordinate with the ultrasonic intensity adaptive adjustment module. The microcontroller of the ultrasonic intensity adaptive adjustment module receives the pulse sequence signals and, when simulating enhanced daytime light, increases the ultrasonic frequency within the frequency range corresponding to the plant's growth cycle to promote nutrient absorption and metabolism during photosynthesis. When simulating weakened nighttime light or darkness, it decreases the ultrasonic frequency to adapt the physiological activities of the plant roots to the light cycle and optimize the synthesis and metabolism of endogenous hormones in the plant.

[0055] Several sensors are also installed on the substrate to monitor substrate humidity, dissolved oxygen concentration and crop growth status in real time, including: substrate humidity sensor, dissolved oxygen sensor and root temperature sensor. The system uses RS485 bus communication. After the data is fed back to the intelligent control unit, the ultrasonic frequency, atomization intensity and nutrient solution ratio are automatically adjusted to ensure that the root microenvironment is in the best condition.

[0056] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate, comprising: The matrix treatment unit, ultrasonic atomization system, and intelligent control unit are characterized by: The matrix treatment unit is equipped with a coarse coconut coir pretreatment module; the matrix has a layered filling structure, which includes, from bottom to top: a bottom layer of coconut shell carbon particles, a middle layer of modified coarse coconut coir matrix, and a surface layer of carbonized rice husk. The ultrasonic atomization system includes: a three-dimensional spiral guide channel spirally surrounding the matrix, a high-frequency piezoelectric ceramic atomizing sheet group disposed at the inlet of the three-dimensional spiral guide channel, and a nanobubble generator disposed at the outlet of the three-dimensional spiral guide channel. The intelligent control unit includes an ultrasonic intensity adaptive adjustment module and a pulse sequence control module, and is connected to the sensor group set in the matrix processing unit.

2. The soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate according to claim 1, characterized in that: The bottom layer of coconut shell charcoal particles has a thickness of 2-3 cm and a particle size range of 0.5-2 mm; the middle layer of modified coarse coconut coir matrix has a thickness of 5 cm, a particle size range of 2-5 mm, a porosity of ≥75%, and a pore size distribution of 50-200 μm; the top layer of carbonized rice husk has a thickness of 1 cm, a particle size range of 1-3 mm, and a carbonization temperature of ≥500℃.

3. The soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate according to claim 1, characterized in that: The three-dimensional spiral guide pipe has an outer diameter of 5-10cm, an inner diameter of 3-8cm, 3-6 spiral turns, and a total length of 1-3m. The outlet end of the three-dimensional spiral guide pipe is connected to the nanobubble generator via a flange, and an O-ring is provided at the connection.

4. The soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate according to claim 1, characterized in that: The high-frequency piezoelectric ceramic atomizing plate assembly comprises two or more piezoelectric ceramic atomizing plates connected in parallel, with a resonant frequency of 1.7-2MHz and a single-plate power density of 0.3W / cm². 2 .

5. The soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate according to claim 1, characterized in that: The ultrasonic atomization system is connected to the nutrient solution circulation system, which includes: a nutrient solution storage tank, a supply pipeline and a return pipeline connected to the nutrient solution storage tank, and a circulation pump installed on the return pipeline.

6. The soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate according to claim 5, characterized in that: The high-frequency piezoelectric ceramic atomizing plate assembly is connected to the supply pipeline via a silicone hose. The inner diameter of the hose is interference-fitted with the outer diameter of the atomizing plate, with a fit clearance of 0.1-0.2 mm.

7. The soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate according to claim 1, characterized in that: The nanobubble generator includes a microporous titanium alloy nozzle with a nozzle diameter of 50-100 μm and a nozzle density of 80-120 pores / cm². 2 The device operates at a pressure of 0.5-0.8 MPa, produces oxygen bubbles with a diameter of <200 nm, and generates a nutrient solution with a dissolved oxygen concentration of ≥8 mg / L.

8. The soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate according to claim 5, characterized in that: The liquid storage tank has a volume of 50-100L, the circulation pump has an adjustable flow rate of 5-15L / min and a head of 1.5-2.5m, and the return pipeline is equipped with an online filter with a filter screen pore size of 20-50μm.

9. The soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate according to claim 3, characterized in that: The inlet end of the three-dimensional spiral guide pipe is equipped with a Venturi effect acceleration structure, with a cone angle of 15-20° in the contraction section and a cone angle of 5-8° in the expansion section.

10. The soilless cultivation and breeding acceleration device based on ultrasonic synergistic coarse coconut coir substrate according to claim 1, characterized in that: The sensor group includes a substrate humidity sensor, a dissolved oxygen sensor, and a root temperature sensor, and communicates via an RS485 bus.

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