Intelligent planting method and system for submerged plants based on bionic light compensation and storage medium

Abstract

The application relates to the technical field of submerged plant planting, and discloses a submerged plant intelligent planting method and system based on bionic light compensation and a storage medium. The system comprises the following steps: constructing a bionic anemone tentacle flexible base plate, being equipped with a shape memory polyurethane fixing arm and a silica gel suction cup; preparing three-layer gradient nutrient slow-release microcapsules and loading the three-layer gradient nutrient slow-release microcapsules into a base plate nutrient cavity; calculating a water depth spectral attenuation coefficient through a chlorophyll fluorescence decay inversion algorithm to generate depth adaptive light compensation parameters; and adopting a degradable spiral inverted spike anchor nail fixation to realize submerged plant intelligent planting. The technical problems of unstable anchoring, unmatched nutrient supply and inaccurate light compensation in the planting of submerged plants in deep water areas are solved, and the success rate of plant planting in deep water areas with a depth of more than 3 meters and the ecological restoration effect are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of submerged plant planting, and in particular to a submerged plant intelligent planting method and system based on bionic light compensation and a storage medium. BACKGROUND

[0002] In the prior art, submerged plant planting mainly adopts direct seeding or seedling transplanting, and plant fixation is achieved through simple weight pressing or plastic net bag wrapping, and nutrient supply relies on natural nutrients in the water body or one-time granular fertilizer. Illumination conditions completely depend on natural light, and when the water depth exceeds 2 meters, due to serious light attenuation, plant photosynthesis is limited, and the success rate of planting is generally low.

[0003] The prior art has the following disadvantages: first, the traditional rigid fixation method is prone to loosening or uprooting under water flow disturbance, especially in deep water areas above 3 meters, and the anti-disturbance ability is extremely weak when the plant root system has not been completely established; second, the single release rate of nutrient supply cannot match the differentiated needs of submerged plants at different growth stages, resulting in insufficient nutrients at the initial stage or excessive nutrients at the later stage; third, there is a lack of active compensation mechanism for light conditions in deep water areas, and plants grow slowly or even die in low light environments.

[0004] The core problem of traditional planting technology lies in the lack of organic combination of bionic design thinking and intelligent control means. Since the efficient anchoring mechanism of marine organisms is not used for reference, the existing fixing device cannot remain stable in a complex water dynamic environment; at the same time, there is a lack of light compensation algorithm based on plant physiological feedback, which cannot accurately adjust according to the changes of light environment in different water depths and the actual photosynthetic needs of plants, which leads to the technical bottleneck of low survival rate, long growth cycle and poor ecological restoration effect in deep water area submerged plant planting. SUMMARY

[0005] The present application provides a submerged plant intelligent planting method and system based on bionic light compensation and a storage medium, which solves the technical problems of unstable anchoring, unmatched nutrient supply and inaccurate light compensation in deep water area submerged plant planting, and improves the success rate and ecological restoration effect of plant planting in deep water areas above 3 meters.

[0006] In a first aspect, the present application provides a submerged plant intelligent planting method based on bionic light compensation, which comprises:

[0007] Step S1, a flexible planting base of bionic anemone tentacle structure is constructed, the base is provided with 8-12 shape memory polyurethane fixing arms and a silica gel suction cup base, the surface of the fixing arm has a micro barb structure, and a bionic anchoring unit is obtained;

[0008] Step S2, prepare three-layer coated gradient nutrient slow-release microcapsules, the inner layer is a nitrogen, phosphorus and potassium nutrient matrix, the middle layer is an ethyl cellulose controlled-release film, and the outer layer is a sodium alginate trigger film, load the microcapsules into the nutrient slow-release cavity of the biomimetic anchoring unit to form an intelligent nutrient carrier;

[0009] Step S3, calculate the water depth spectral attenuation coefficient by a plant chlorophyll fluorescence decay rate inversion algorithm, which integrates chlorophyll fluorescence kinetic parameters and water optical properties, reversely calculates the light compensation demand of each depth layer according to the fluorescence decay gradient, and generates depth-adapted light compensation parameters;

[0010] Step S4, prepare a spiral barb anchor by using modified polyhydroxybutyric acid valerate, the anchor is arranged in a regular hexagonal array, and is fixedly connected with the intelligent nutrient carrier through a degradable polyester fiber connecting rope, and the depth-adapted light compensation parameters are combined to realize intelligent planting of the submerged plant.

[0011] In a second aspect, the present application provides a submerged plant intelligent planting system based on biomimetic light compensation, which comprises:

[0012] An anchoring module is configured to construct a flexible planting base with a biomimetic anemone tentacle structure, the base is provided with 8-12 shape memory polyurethane fixing arms and a silica gel suction cup base, the surface of the fixing arm has a micro barb structure, and a biomimetic anchoring unit is obtained.

[0013] A loading module is configured to prepare three-layer coated gradient nutrient slow-release microcapsules, the inner layer is a nitrogen, phosphorus and potassium nutrient matrix, the middle layer is an ethyl cellulose controlled-release film, and the outer layer is a sodium alginate trigger film, load the microcapsules into the nutrient slow-release cavity of the biomimetic anchoring unit to form an intelligent nutrient carrier.

[0014] A calculation module is configured to calculate a water depth spectral attenuation coefficient by a plant chlorophyll fluorescence decay rate inversion algorithm, which integrates chlorophyll fluorescence kinetic parameters and water optical properties, reversely calculates the light compensation demand of each depth layer according to the fluorescence decay gradient, and generates depth-adapted light compensation parameters.

[0015] A connecting module is configured to prepare a spiral barb anchor by using modified polyhydroxybutyric acid valerate, the anchor is arranged in a regular hexagonal array, and is fixedly connected with the intelligent nutrient carrier through a degradable polyester fiber connecting rope, and the depth-adapted light compensation parameters are combined to realize intelligent planting of the submerged plant.

[0016] In a third aspect, a computer readable storage medium is provided, and the computer readable storage medium stores instructions, when the instructions are run on a computer, the computer executes the above-mentioned submerged plant intelligent planting method based on biomimetic light compensation.

[0017] In the technical scheme provided in the application, the flexible fixing disc is constructed by the bionic anemone tentacle structure, 8-12 shape memory polyurethane fixing arms and a silica gel suction cup base are designed, so that the fixing device can keep flexible deformation without falling off under water flow disturbance, and the micro barb structure further enhances the mechanical locking effect with the substrate, effectively solving the problem that the traditional rigid fixing mode is easy to loosen in deep water. The prepared three-layer coated gradient nutrient slow-release microcapsules realize the staged quantitative release of nutrient elements through the precise design of the inner layer nitrogen, phosphorus and potassium nutrient substrate, the middle layer ethyl cellulose controlled-release film and the outer layer sodium alginate trigger film, avoiding the nutrient waste and environmental pollution caused by traditional one-time fertilization, and meeting the differentiated nutrient needs of submerged plants at different growth stages. The plant chlorophyll fluorescence decay rate inversion algorithm is used, which can accurately calculate the light compensation demand of each depth layer by fusing the chlorophyll fluorescence kinetic parameters and the water optical properties, and generate depth adaptive light compensation parameters, realizing the technical breakthrough from passive adaptation to light environment to active adjustment of light conditions. The spiral barb anchor prepared from modified polyhydroxybutyric acid valeric acid ester is arranged in a regular hexagonal array and fixedly connected with the intelligent nutrient carrier through the degradable polyester fiber connecting cable, which not only ensures the stability of the overall structure, but also realizes the environmental friendliness of the material, avoiding the long-term pollution of traditional metal or plastic anchoring to the aquatic ecosystem.

[0018] The plant chlorophyll fluorescence decay rate inversion algorithm as the core technical feature of the application plays a key role in the application of submerged plants in deep water. The unique feature of the algorithm is to inversely calculate the light demand through the physiological response parameters of the plant itself, which can more accurately reflect the actual photosynthetic demand state of the plant compared with the traditional direct measurement method of environmental light intensity, avoiding the light monitoring deviation caused by factors such as water turbidity change and algal shading. The algorithm fuses the chlorophyll fluorescence kinetic parameters and the water optical properties to establish an accurate mapping relationship between the physiological state of the plant and the light environment, so that the light compensation control is changed from empirical adjustment to precise control based on scientific principles, significantly improving the effectiveness of light compensation in deep water and the rationality of energy consumption control, and providing reliable technical support for the healthy growth of submerged plants in complex light environment. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 The figure is a schematic diagram of the intelligent planting method of submerged plants based on bionic light compensation in the application;

[0021] Figure 2 FIG. 1 is a schematic diagram of performance analysis of the intelligent planting method of submersed plants based on bionic light compensation in an embodiment of the present application;

[0022] Figure 3 FIG. 2 is a schematic diagram of one embodiment of the intelligent planting system of submersed plants based on bionic light compensation in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The embodiment of the present application provides a kind of intelligent planting method, system and storage medium based on bionic light compensation of submersed plants.The terms "first", "second", "third", "fourth" and the like (if exist) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe specific order or sequence.It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein.In addition, the terms "include" or "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0024] For ease of understanding, the specific process of the embodiment of the present application is described below, please refer to Figure 1 One embodiment of the intelligent planting method of submersed plants based on bionic light compensation in the embodiment of the present application includes:

[0025] Step S1, construct flexible planting base of bionic anemone tentacle structure, base is provided with 8-12 shape memory polyurethane fixing arm and silica gel suction cup base, the surface of fixing arm has micro barb structure, to obtain bionic anchoring unit;

[0026] Step S2, prepare three-layer coated gradient nutrient slow-release microcapsules, the inner layer is nitrogen, phosphorus and potassium nutrient medium, the middle layer is ethyl cellulose controlled-release film, and the outer layer is sodium alginate trigger film, load the microcapsules to the nutrient slow-release cavity of the bionic anchoring unit to form intelligent nutrient carrier;

[0027] Step S3, calculate water depth spectral attenuation coefficient by plant chlorophyll fluorescence decay rate inversion algorithm, the algorithm fuses chlorophyll fluorescence kinetic parameters and water optical properties, according to fluorescence decay gradient, the light compensation demand of each depth layer is reversely calculated, and depth adaptive light compensation parameters are generated;

[0028] Step S4, the modified polyhydroxybutyrate valerate is used to prepare a spiral barb anchor, the anchor is arranged in a regular hexagonal array, and the anchor is fixedly connected with the intelligent nutrient carrier through the degradable polyester fiber connecting rope, and the intelligent planting of the submerged plant is realized by combining the deep adaptive light compensation parameters.

[0029] Specifically, a dimethicone material is processed in a concentric circle shape to obtain a silica gel suction disc base based on the suction disc attachment mechanism of a sea anemone; a laser micro-processing is performed on a shape memory polyurethane material to form a micro barb structure on the surface of the shape memory polyurethane material to obtain a flexible anchoring arm assembly; the flexible anchoring arm assembly is fixed to the edge of a polylactic acid-glycolic acid copolymer base disc at a circumferentially equal angle to assemble a tentacle-shaped fixing structure to form a bionic anchoring unit; and the bionic anchoring unit is subjected to nutrient liquid soaking pretreatment to form a hydrophilic film layer on the surface of the base disc. In the process, the design of the silica gel suction disc base and the flexible anchoring arm assembly can keep flexible deformation and not fall off under water flow disturbance, and the micro barb structure enhances the mechanical locking effect with the substrate

[0030] The ammonium nitrate, potassium dihydrogen phosphate and potassium sulfate are mixed and granulated at a set mass ratio to obtain a nitrogen, phosphorus and potassium nutrient substrate particle; the ethyl cellulose and polylactic acid material are blended and coated to form a controlled release film layer on the surface of the nutrient substrate particle to obtain a double-layer coated particle; the sodium alginate solution is sprayed to coat a trigger film layer on the surface of the double-layer coated particle to obtain a three-layer coated gradient nutrient slow-release microcapsule; and the microcapsules are mixed at a set ratio of fast release type, medium release type and slow release type and loaded into the nutrient slow-release cavity of the bionic anchoring unit. The three-layer coated structure releases the nutrient elements in stages and quantitatively, the fast release type meets the demand of the initial stage of plant planting, the medium release type adapts to the middle stage of growth, and the slow release type guarantees the late stage of growth, thereby avoiding the waste of nutrients and environmental pollution caused by traditional one-time fertilization.

[0031] The spectral quantum sensor is used to collect red light, blue light and far-red light photon flux density data at different water depths to form a layered spectral attenuation data set; the plant leaves are irradiated with excitation light, the chlorophyll fluorescence emission intensity is detected, and the fluorescence decay rate parameter is calculated to obtain the chlorophyll fluorescence kinetic parameter; the layered spectral attenuation data set is inversely calculated based on the chlorophyll fluorescence kinetic parameter to calculate the difference between the plant photosynthetically active radiation requirement and the environmental light intensity at each depth layer to obtain the light compensation requirement data; and the light compensation requirement data is converted into the red and blue light ratio of the LED lamp bead and the PWM modulation duty cycle parameter. The chlorophyll fluorescence kinetic parameter can reflect the actual photosynthetic requirement of the plant, and the inverse calculation combined with the optical characteristics of the water body can avoid the light monitoring deviation caused by the change of water turbidity and algal shading.

[0032] The natural fiber is added to the polyhydroxybutyric acid valeric acid ester material to perform a modification and reinforcement treatment to obtain a modified anchor material; the modified anchor material is subjected to a spiral barb structure forming treatment to prepare a biodegradable anchor assembly; the biodegradable anchor assembly is positioned and installed according to a regular hexagonal array layout, and a degradable polyester fiber connecting cable is connected to an intelligent nutrient carrier to obtain a planting fixing device; and the LED light supplementing device is real-time regulated based on depth adaptive light compensation parameters. The spiral barb anchor and the regular hexagonal array distribution design enhance the bonding strength of the anchor and the substrate and make the stress evenly dispersed, and the degradable material avoids the long-term pollution of traditional metal or plastic anchoring devices to the aquatic ecological system.

[0033] In an embodiment, step S1 comprises:

[0034] (1) Based on the sea anemone sucker attachment mechanism, a concentric circular texture processing is performed on a polydimethylsiloxane material to obtain a silica gel sucker base;

[0035] (2) A laser micro-processing is performed on a shape memory polyurethane material to form a micro barb structure on the surface of the fixed arm to obtain a flexible anchoring arm assembly;

[0036] (3) The flexible anchoring arm assembly is fixed to the edge of a polylactic acid-glycolic acid copolymer base disc according to a circumferential equal angle to assemble a tentacle-shaped fixing structure to obtain the bionic anchoring unit;

[0037] (3) The bionic anchoring unit is subjected to a nutrient liquid soaking pretreatment to form a hydrophilic film layer on the surface of the base disc to obtain a biocompatible planting base disc.

[0038] Specifically, based on the sea anemone sucker attachment mechanism, a polydimethylsiloxane material is selected as the raw material of the silica gel sucker base, and a concentric circular texture processing is performed on the material, the texture depth is controlled at 0.3-0.8mm, and the interval is set at 1-2mm. Through the processing, the surface of the silica gel sucker base forms a structure that meets the attachment characteristics of the sea anemone sucker, improves the contact and adsorption capacity with the water bottom substrate, and solves the problem that the traditional rigid fixing method is easy to loosen under water flow disturbance. Because the traditional fixing device lacks a bionic adsorption structure, it cannot be stably attached in a complex hydrodynamic environment, and the concentric circular texture can increase the contact area of the sucker and the substrate and enhance the adsorption force.

[0039] For shape memory polyurethane material, laser micro machining process is used to process micro barb structure on its surface, the height of barb is set to 0.5-1.0mm, the interval is 2-3mm, and the angle of barb is controlled to 45°-60°, and after processing, a flexible anchoring arm assembly is obtained. The flexible anchoring arm assembly remains flexible within the water temperature range of 15°-25℃, can be bent and deformed under external force, and returns to its original state after the external force is removed. The micro barb structure has a one-way locking function and can prevent the anchoring arm from being pulled out of the substrate after being inserted into the substrate. The problem of weak anti-disturbance ability of traditional fixing method is further solved. The traditional rigid fixing arm is easy to break or shift under water flow, while the flexible structure combined with the barb design can not only adapt to the deformation caused by water flow, but also enhance the locking effect with the substrate through the barb.

[0040] The polylactic acid-glycolic acid copolymer base disc body is disc-shaped, with a diameter of 180-220mm and a thickness of 8-12mm. A plant root system containing cavity with a diameter of 60-80mm and a depth of 40-60mm is arranged at the center. The flexible anchoring arm assembly is fixed at the edge of the base disc according to the circumferential angle. If 8 flexible anchoring arms are arranged on the base disc, the circumferential angle between adjacent anchoring arms is 45°. If 12 flexible anchoring arms are arranged, the angle between adjacent anchoring arms is 30°. After assembly, a tentacle-shaped fixing structure, i.e. a bionic anchoring unit, is formed. The base disc is made of biodegradable material, which avoids long-term pollution of traditional plastic or metal base disc to aquatic ecological system. At the same time, the tentacle-shaped fixing structure can disperse the impact force of water flow on the device from multiple directions, improving the overall stability. The traditional single fixing point fixing method is easy to overturn under the action of water flow due to stress concentration, while the multi-point tentacle-shaped structure can disperse external force to each anchoring arm, reducing the stress load of each anchoring point.

[0041] The bionic anchoring unit is soaked in nutrient solution for pretreatment. The pH value of the nutrient solution is controlled at 6.5-7.5, and the soaking time is 24-48 hours. At the same time, gibberellin and cytokinin compound with a mass concentration of 100-200mg / L are added to the nutrient solution as plant growth regulators. During the soaking process, the polylactic acid-glycolic acid copolymer base disc surface will adsorb the components in the nutrient solution to form a hydrophilic film layer. The film layer can improve the biocompatibility of the base disc and the plant root system, promote the growth of the root system and the base disc, and solve the problem of strong hydrophobicity of the surface of the traditional planting base disc, which makes it difficult for the root system to adhere. The traditional base disc often cannot stably fix the root system due to the surface characteristics, affecting plant growth. The hydrophilic film layer can improve the contact environment between the root system and the base disc, and the growth regulators in the nutrient solution can be adsorbed on the surface of the base disc to provide root-promoting conditions for subsequent plant planting, help the root system to develop rapidly, and enhance the anti-disturbance ability of the plant in the early stage.

[0042] In a specific embodiment, step S2 comprises:

[0043] (1) mixing and granulating ammonium nitrate, potassium dihydrogen phosphate, and potassium sulfate according to a set mass ratio to obtain a nitrogen-phosphorus-potassium nutrient substrate particle;

[0044] (2) blending and film-coating ethyl cellulose and polylactic acid to form a controlled-release film layer on the surface of the nutrient substrate particle to obtain a double-layer film-coated particle;

[0045] (3) spraying and coating sodium alginate solution to form a trigger film layer on the surface of the double-layer film-coated particle to obtain the three-layer film-coated gradient nutrient slow-release microcapsule;

[0046] (4) mixing and loading the microcapsules according to a set ratio of fast-release type, medium-release type, and slow-release type, and filling them into the nutrient slow-release cavity of the biomimetic anchoring unit to obtain the intelligent nutrient carrier.

[0047] Specifically, ammonium nitrate, potassium dihydrogen phosphate, and potassium sulfate are mixed according to a set ratio of 2:1:1, and the three components are uniformly dispersed by a stirring device during the mixing process. Subsequently, granulation is performed, and the outlet particle size parameter of the granulation device is controlled to maintain the diameter of the prepared nitrogen-phosphorus-potassium nutrient substrate particle within the range of 0.8-1.2 mm. The background art indicates that traditional nutrient supply relies on one-time feeding of granular fertilizer, which cannot match the different growth stage requirements of submerged plants. The nitrogen-phosphorus-potassium nutrient substrate particle with the set ratio can provide basic and balanced core nutrients for submerged plants, avoid excessive or insufficient single components, and preliminarily solve the problem of mismatch between nutrient supply and plant demand. Among them, ammonium nitrate provides nitrogen elements to support plant leaf growth, potassium dihydrogen phosphate provides phosphorus and potassium elements to promote root development and enhance stress resistance, and potassium sulfate supplements potassium elements to ensure plant metabolism.

[0048] Ethyl cellulose and polylactic acid are blended according to a mass ratio of 3:2. The two materials are fully fused to form a uniform film-coating material by heating and stirring during blending. Subsequently, the nitrogen-phosphorus-potassium nutrient substrate particle is film-coated using a film-coating device. The coating thickness parameter of the film-coating device is adjusted to control the thickness of the formed controlled-release film layer within the range of 50-100 μm. After treatment, a double-layer film-coated particle is obtained. The controlled-release film layer can slow down the release rate of nutrients in the nutrient substrate particle, avoid the initial nutrient excess or later nutrient deficiency caused by traditional one-time fertilization, and control the slow penetration of nutrients due to the good chemical stability of ethyl cellulose. Polylactic acid has biodegradability, which can avoid long-term residue of film-coating materials and pollution of the water environment. This further optimizes the sustainability of nutrient supply and solves the problem of single release rate of traditional nutrient supply.

[0049] A certain concentration of sodium alginate solution is prepared, and a spray coating device is used to spray coat the double-layer coated particles. The atomization pressure, spray amount and moving speed of the spray coating device are adjusted to control the thickness of the trigger film layer formed to be 20-40 μm, and to ensure that the film layer is evenly covered on the surface of the double-layer coated particles. After treatment, a three-layer coated gradient nutrient slow-release microcapsule is obtained. Sodium alginate has specific solubility in water. The trigger film layer formed by sodium alginate will gradually dissolve in 6-12 hours after contacting with water, providing an initial trigger condition for subsequent nutrient release. After dissolution, the inner controlled release film layer can more accurately adjust the nutrient release according to the environmental demand, avoiding the premature release of nutrients during the non-plant demand period, improving the accuracy of nutrient supply, adapting to the differentiated demand of submerged plants for nutrients at different growth stages, and further solving the technical problem of mismatched nutrient supply.

[0050] According to the nutrient demand law of submerged plants during the growth cycle, the three-layer coated gradient nutrient slow-release microcapsules are mixed at a set ratio of 30% fast-release type, 50% medium-release type and 20% slow-release type. The total thickness of the film layer of the fast-release type microcapsule (controlled release film layer + trigger film layer) is controlled to be 50-70 μm, and the release period is 7-14 days, which meets the rapid demand for nutrients during the initial stage of plant colonization. The total thickness of the film layer of the medium-release type microcapsule is 70-90 μm, and the release period is 15-45 days, which adapts to the stable nutrient demand during the middle stage of plant growth. The total thickness of the film layer of the slow-release type microcapsule is 90-100 μm, and the release period is 46-90 days, which guarantees the nutrient supply during the late stage of plant growth. After mixing, the microcapsules are filled into the nutrient slow-release cavities of the biomimetic anchoring unit. The nutrient slow-release cavities are arranged at the edge of the base plate, and there are 6-8 cavities. The volume of each cavity is 3-5 ml. During filling, the amount of microcapsules filled in each cavity is uniform. After filling, an intelligent nutrient carrier is formed. The matching design of the mixing ratio and the release period realizes the gradient release of nutrients during the entire growth cycle of plants, completely solves the technical problem that traditional nutrient supply cannot match the demand of plants at different growth stages, and at the same time, the nutrient slow-release cavities are connected to the root cavity through a 1-2 mm diameter hole, which can direct the released nutrients to the surrounding of plant roots, improve the nutrient utilization rate, and avoid waste and environmental pollution caused by the diffusion of nutrients with water flow.

[0051] In a specific embodiment, step S3 comprises:

[0052] (1) Collect red light, blue light and far-red light photon flux density data at different water depths by a spectral light quantum sensor to obtain a layered spectral attenuation data set;

[0053] (2) Irradiate the plant leaves with excitation light, detect the chlorophyll fluorescence emission intensity and calculate the fluorescence decay rate parameter to obtain the chlorophyll fluorescence kinetic parameter;

[0054] (3) Based on the chlorophyll fluorescence kinetic parameters, the layered spectral attenuation data set is calculated and processed, and the difference between the plant photosynthetic active radiation requirement and the environmental light intensity is calculated to obtain the light compensation requirement data;

[0055] (4) The light compensation requirement data is converted into LED lamp bead red and blue light ratio and PWM modulation duty cycle parameters to generate the depth adaptive light compensation parameters for different water depths.

[0056] Specifically, to solve the problem of inaccurate light compensation of submerged plants in deep water area and low planting success rate caused by dependence on natural light in the prior art, a spectral quantum sensor is arranged at monitoring points at different depths (1 m, 2 m, 3 m, 4 m, 5 m) in the target water area, and the photon flux density data of red light (660 nm band), blue light (450 nm band) and far red light (730 nm band) at each depth are collected. The average value is taken after collecting each depth and each band data multiple times to form a layered spectral attenuation data set containing different water depths and corresponding red, blue and far red light photon flux density. This process can accurately capture the spectral distribution difference at different water depths, avoid the problem that traditional single depth monitoring cannot reflect the change rule of light intensity with water depth, and provide basic data support for subsequent light compensation calculation. Among them, red light is related to the absorption of chlorophyll a, blue light is related to the absorption of chlorophyll b, and far red light affects plant photomorphogenesis. The collection of three band data can comprehensively reflect the light environment required for plant photosynthesis.

[0057] The excitation light pulse with a wavelength of 630 nm is applied to the submerged plant leaves to excite the chlorophyll molecules in the leaves to emit fluorescence. Then the change of chlorophyll fluorescence emission intensity at a wavelength of 685 nm is detected by a photomultiplier tube, and the fluorescence intensity data is recorded at a set time interval to form a data sequence of fluorescence intensity decay with time and draw a fluorescence decay curve. The curve is fitted by an exponential function to calculate the time constant and decay rate parameters of the fluorescence intensity decay, and then the maximum fluorescence yield, steady-state fluorescence intensity and photochemical quenching coefficient are further calculated based on these parameters, and finally the chlorophyll fluorescence kinetic parameters are obtained. The prior art lacks a light compensation mechanism based on plant physiological feedback, while the chlorophyll fluorescence kinetic parameters can directly reflect the physiological state of plant photosynthesis. For example, the photochemical quenching coefficient can reflect the utilization efficiency of plant light energy, and the decay rate parameter can reflect the activity of the photosynthetic reaction center. Through these parameters, the actual photosynthetic requirement of the plant can be accurately judged, and the deviation caused by adjusting the light compensation only according to the environmental light intensity can be avoided.

[0058] Based on the chlorophyll fluorescence kinetic parameters, the red, blue and far red light photon flux density data of each water depth in the layered spectral attenuation data set is calculated. First, the model is improved based on Beer-Lambert law （ wherein represents the light intensity at depth z, represents the water surface light intensity, k represents the light attenuation coefficient, represents the time correction factor, combining the photochemical quenching coefficient and the maximum fluorescence yield in the chlorophyll fluorescence kinetic parameters, the light attenuation coefficient at different water depths is corrected k value, such as when the photochemical quenching coefficient decreases, indicating that the plant light energy utilization efficiency decreases, the light compensation intensity of the water depth needs to be appropriately increased, and then the plant photosynthetically active radiation requirement (assuming that the plant light saturation point is 100~300 μmol / (m²・s), the light compensation point is 10~30 μmol / (m²・s), and the optimal light intensity is set to 200 μmol / (m²・s)) at each depth is calculated, and then the requirement is subtracted from the corresponding environmental light intensity (extracted from the stratified light spectrum attenuation data set) to obtain the light compensation requirement data at each water depth. The inversion calculation process combines plant physiological state and environmental light intensity data to solve the problem that traditional light compensation requirement cannot match the actual demand of plants only according to environmental light intensity, so that the light compensation requirement is more in line with the photosynthetic demand of plants.

[0059] According to the corresponding relationship between the light compensation requirement data and the light-emitting characteristics of the LED lamp beads, the light compensation requirement at different water depths is converted into the red-blue light ratio and the PWM modulation duty cycle parameters of the LED lamp beads. When the light compensation requirement at a certain water depth is high and the chlorophyll fluorescence kinetic parameters show that the demand for chlorophyll a increases, the proportion of red light (660 nm) lamp beads is increased; if the demand for chlorophyll b increases, the proportion of blue light (450 nm) lamp beads is increased, and the red-blue light ratio adjustment range is 30%~50% for red light and 20%~40% for blue light. At the same time, the PWM modulation duty cycle is positively correlated with the light compensation requirement, and the duty cycle range is set to 10%~100%, and the corresponding light intensity output is 20~200 μmol / (m²・s), such as when the light compensation requirement is 100 μmol / (m²・s), the duty cycle is adjusted to 50%, to ensure that the LED light compensation intensity accurately matches the demand. The conversion process realizes the conversion of light compensation parameters from abstract data to hardware executable parameters, solves the problem that traditional fixed intensity light compensation cannot adapt to different water depths and different plant physiological states, and finally generates depth adaptive light compensation parameters for different water depths, providing hardware control basis for precise light compensation.

[0060] Figure 2 is a performance analysis schematic diagram of the intelligent planting method of submerged plants based on bionic light compensation in the embodiments of the present application; for example Figure 2As shown, the embodiments of the present application verify the technical effect of the intelligent planting method through four key performance indicators. The upper left graph shows the thickness distribution of the three-layer coating gradient nutrient slow-release microcapsules, in which the fast-release type (50-70 pm), the medium-release type (70-90 pm), and the slow-release type (90-100 pm) of the coating thickness design realizes the phased quantitative release of nutrient elements; the upper right graph shows the volume distribution of 6-8 nutrient slow-release cavities in the biomimetic anchoring unit, with each cavity volume controlled within the range of 3-5 ml, ensuring the uniformity of nutrient supply; the lower left graph compares the pullout resistance performance of traditional straight rod anchors and spiral barbed anchors, verifying the stability advantage of the biomimetic anchoring design; the lower right graph shows the depth-adaptive light compensation parameter distribution generated based on the chlorophyll fluorescence decay rate inversion algorithm, with the color mapping of the scatter points representing the red and blue light ratio (30%-50% red light, 20%-40% blue light), and the Y-axis representing the variation law of the PWM modulation duty cycle (10%-100%) with water depth (1-5 m), verifying the accuracy and effectiveness of the light compensation algorithm.

[0061] In a specific embodiment, the plant leaves are subjected to excitation light irradiation treatment, the chlorophyll fluorescence emission intensity is detected, and the fluorescence decay rate parameter is calculated to obtain the chlorophyll fluorescence kinetic parameters, including:

[0062] (1) The plant leaves are subjected to excitation light pulse irradiation treatment at a wavelength of 630 nm to excite chlorophyll molecules to produce fluorescence emission, and an initial fluorescence signal is obtained;

[0063] (2) The change in chlorophyll fluorescence emission intensity at a wavelength of 685 nm is detected by a photomultiplier tube, and a data sequence of fluorescence intensity decay over time is recorded to obtain a fluorescence decay curve;

[0064] (3) The fluorescence decay curve is subjected to exponential function fitting treatment to calculate the time constant and decay rate parameter of the fluorescence intensity decay, and the fluorescence decay kinetic characteristic value is obtained;

[0065] (4) The maximum fluorescence yield, steady-state fluorescence intensity, and photochemical quenching coefficient are calculated based on the fluorescence decay kinetic characteristic value to obtain the chlorophyll fluorescence kinetic parameters.

[0066] Specifically, to solve the problems of lack of light compensation mechanism based on plant physiological feedback and inability to accurately determine the photosynthetic demand of plants in the prior art, the submerged plant leaves are first irradiated with an excitation light pulse with a wavelength of 630 nm, which matches the absorption spectrum peak of chlorophyll molecules and can effectively excite the chlorophyll molecules to transition from the ground state to the excited state. The excited-state chlorophyll molecules release fluorescence in the process of returning to the ground state, thereby generating an initial fluorescence signal. The prior art in the background art only adjusts the light compensation through the ambient light intensity and does not consider the photosynthetic physiological state of the plant itself. The 630 nm excitation light pulse can specifically activate the chlorophyll, ensure that the initial fluorescence signal directly reflects the activity state of the photosynthetic pigment of the plant, avoid signal interference caused by non-specific excitation, and lay a foundation for subsequent accurate acquisition of plant photosynthetic information. The intensity of the excitation light pulse in this process needs to be controlled within a range that does not damage the plant leaves, while ensuring the detectability of the fluorescence signal.

[0067] After the initial fluorescence signal is generated, the photomultiplier tube detects the change in the chlorophyll fluorescence emission intensity at a wavelength of 685 nm. The wavelength of 685 nm is a characteristic wavelength of chlorophyll fluorescence emission, and the fluorescence signal intensity at this wavelength is directly related to the chlorophyll content and the activity of the photosynthetic reaction center. The photomultiplier tube records the fluorescence intensity data at a time interval of 10 ms for 300 ms, forming a data set containing time and corresponding fluorescence intensity, i.e., a data sequence of the decay of fluorescence intensity over time. Then, the data sequence is plotted into a fluorescence decay curve with time as the horizontal coordinate and fluorescence intensity as the vertical coordinate. The prior art lacks dynamic monitoring of the fluorescence decay process and cannot capture the change rule of fluorescence intensity over time. However, this process can fully present the whole process of chlorophyll fluorescence from excitation to decay through high-frequency data acquisition and curve drawing. The initial segment of the fluorescence decay curve reflects the rapid relaxation process of the excited-state chlorophyll molecules, the middle segment reflects the decay process related to photosynthetic electron transfer, and the latter segment reflects the slow decay process related to non-photochemical quenching. The change characteristics at different stages can correspond to different functional states of the plant photosynthetic system.

[0068] The fluorescence decay curve is fitted using an exponential function model, which is wherein is the fluorescence intensity at time t, is the initial fluorescence intensity, is the fluorescence decay time constant, The background fluorescence intensity. The time constant τ and the decay rate parameter (the decay rate is 1 / τ) of the fluorescence intensity decay are calculated by fitting the fluorescence decay curve data by the least square method, and the two parameters together constitute the fluorescence decay kinetics characteristic value. The fluorescence decay time constant τ reflects the speed of chlorophyll fluorescence decay, the smaller the τ value, the faster the decay rate, which means that the photosynthetic reaction center can quickly convert the excitation energy into chemical energy, and the light energy utilization efficiency is higher; on the contrary, the larger the τ value, the slower the decay rate, which may indicate that the photosynthetic reaction center activity is reduced or the light energy conversion is blocked. The traditional technology does not quantitatively analyze the fluorescence decay curve, and cannot obtain accurate kinetic parameters, while the fitting process can convert the qualitative characteristics of the curve into quantitative parameters, providing accurate data support for subsequent calculation of photosynthetic physiological indicators.

[0069] Based on the fluorescence decay kinetics characteristic value, the maximum fluorescence yield (F m ), the steady-state fluorescence intensity (F) and the photochemical quenching coefficient (P) are calculated. In the specific calculation process, the maximum fluorescence yield F m is the maximum fluorescence intensity value at the initial stage of the fluorescence decay curve, which reflects the fluorescence emission level when the photosynthetic reaction center is completely closed; the steady-state fluorescence intensity F is the fluorescence intensity value that tends to be stable in the later stage of the fluorescence decay curve, which reflects the fluorescence emission level when the photosynthetic reaction center is in a steady-state work; the photochemical quenching coefficient P is calculated by the formula P=(F m -F) / (F m -F0), wherein F0 is the initial fluorescence intensity under light adaptation, which can be determined by the fluorescence intensity at the starting point of the fluorescence decay curve. The maximum fluorescence yield F m can reflect the potential photosynthetic capacity of the photosynthetic system, the steady-state fluorescence intensity F can reflect the fluorescence release level in the actual photosynthetic process, and the photochemical quenching coefficient P can reflect the light energy utilization efficiency of the photosynthetic reaction center. These three parameters together constitute the chlorophyll fluorescence kinetics parameters. The traditional technology in the background technology cannot obtain quantitative indicators of the photosynthetic physiological state of plants, resulting in a lack of scientific basis for light compensation adjustment, while the chlorophyll fluorescence kinetics parameters can directly quantify the photosynthetic capacity and light energy utilization of plants. For example, when the photochemical quenching coefficient P value decreases, it indicates that the light energy utilization efficiency of the photosynthetic reaction center decreases, at which time the light compensation parameters need to be adjusted to improve the effectiveness of light energy supply. Through these parameters, the actual photosynthetic demand of plants can be accurately judged, and the technical problem that the traditional light compensation adjustment relies on experience and cannot match the physiological state of plants is solved, thereby providing key physiological data support for generating depth-adapted light compensation parameters.

[0070] In a specific embodiment, step S4 comprises:

[0071] (1) The polyhydroxybutyric acid pentanoate material is added with natural fibers for modification and enhancement treatment to obtain a modified anchor material.

[0072] (2) The modified anchor material is subjected to spiral barb structure forming treatment to prepare anchor monomers with spiral lead and barb angle, and obtain a biodegradable anchor assembly;

[0073] (3) The biodegradable anchor assembly is positioned and installed in a hexagonal array layout, connected with the intelligent nutrient carrier through a degradable polyester fiber connecting cable, and a planting fixing device is obtained;

[0074] (4) The LED light supplementing device is real-time regulated based on the depth adaptive light compensation parameters, and the planting operation of the submerged plant is completed in cooperation with the planting fixing device, and a stable submerged plant community is obtained.

[0075] Specifically, in order to solve the problems of weak disturbance resistance and material pollution of the traditional submerged plant planting fixing device in deep water area, polyhydroxybutyric acid valerate material is selected as the basic raw material, and 5%~10% of natural fiber (flax fiber or jute fiber) is added for modification and enhancement treatment. During the treatment process, the natural fiber and the polyhydroxybutyric acid valerate material are fully mixed by high-speed stirring equipment to ensure that the natural fiber is uniformly dispersed in the substrate. Then, the mixed material is preliminarily processed by extrusion molding process, and the tensile strength of the material is detected and controlled to reach 25~35MPa. In the background art, traditional fixing devices mostly use metal or non-degradable plastic, which can pollute the aquatic ecosystem if left for a long time. The degradation period of polyhydroxybutyric acid valerate material in freshwater environment is 6~12 months, and the degradation product is carbon dioxide and water. After adding natural fiber, the mechanical strength of the material can be improved, solving the problem of insufficient strength of pure polyhydroxybutyric acid valerate material and easy breakage under water flow disturbance, and meeting the stress requirements of complex environment in deep water area.

[0076] The modified anchor material is subjected to spiral barb structure forming treatment, and the modified material is processed into anchor monomers by mold injection molding process. The total length of the anchor is controlled to be 120~180mm, the diameter of the main rod is 8~12mm, the spiral lead is set to 15~25mm, the number of barbs is 4~6, the length of each barb is 6-10mm, the barb angle is controlled to be 30°~45°, and the head of the anchor is designed as a circular cone with a taper angle of 60°~90°, and the tail is processed into a T-shaped pull ring. Traditional anchors are mostly straight rod structures, which are easy to loosen or fall out under water flow impact after being inserted into the water bottom matrix. The spiral structure can increase the contact area between the anchor and the matrix, and the barb angle of 30°~45° can form one-way locking to prevent the anchor from being pulled out upward under external force. The conical head facilitates the insertion of the anchor into the matrix, and the T-shaped pull ring provides a structural basis for subsequent connection with the connecting cable. The processed anchor monomers are combined to form a biodegradable anchor assembly, which not only ensures the fixing effect but also avoids material pollution.

[0077] First, the planting area is calibrated based on the hexagonal geometric layout. The center position of the intelligent nutrient carrier is taken as the origin, and six anchor mounting vertex positions are determined within a radius of 200-300 mm to form an array positioning coordinate set. Then the biodegradable anchor assembly is inserted and mounted according to the coordinate set. The anchor is rotated by a special tool to make the spiral structure rotate into the substrate, ensuring that the barbs form a mechanical lock with the substrate to form an anchor point array. At the same time, the biodegradable polyester fiber is woven to control the diameter of the woven rope to be 3-5 mm, so that the tensile strength of the prepared connecting unit reaches 800-1200 N, and a flexible connecting assembly is obtained. One end of the flexible connecting assembly is connected to the T-shaped pull ring of the anchor point array, and the other end is fixed to the fixed ring node of the intelligent nutrient carrier. The length of the connecting cable is adjusted according to the water depth, which is set to 150 mm for a water depth of 3 meters, 200 mm for a water depth of 4 meters, and 250 mm for a water depth of 5 meters, forming a multi-point distributed fixing structure, i.e. a planting fixing device. Traditional fixing methods are mostly single-point fixing, which can easily lead to device tilting or displacement due to concentrated stress. The hexagonal array layout can evenly distribute the stress, and the length of the connecting cable can be adjusted according to the water depth to ensure that the intelligent nutrient carrier maintains a stable position at different water depths, avoiding the problem of over-tightening or over-loosening due to changes in water depth, and solving the problem of instability of the planting device under water flow disturbance in deep water areas.

[0078] The generated depth-adaptive light compensation parameters are obtained, which include the red and blue light ratios and PWM modulation duty cycles corresponding to different water depths. Based on the parameters, the LED light compensation device is controlled in real time. When the light compensation parameters require a red light ratio of 40%, a blue light ratio of 30%, and a PWM duty cycle of 50% at a water depth of 3 meters, the control unit sends a control signal to the LED drive module to adjust the working current ratio of the red and blue light beads and the duty cycle of the PWM signal, so that the LED light compensation device outputs the corresponding photon flux density. The control cycle is set to 15 minutes, and the light intensity change is limited within ±20% each time to avoid sudden changes in light intensity that may cause stress to plants. Traditional technologies lack an active light compensation mechanism, and plants in deep water areas are limited by photosynthesis due to light attenuation. The control unit, in combination with the stable support of the planting fixing device, provides adaptive light for submerged plants by adjusting the light compensation parameters in real time, solves the problem of inaccurate light compensation, and, in combination with the stable fixing of the planting fixing device, ultimately completes the planting operation of submerged plants and forms a stable submerged plant community.

[0079] In a specific embodiment, the biodegradable anchor assembly is positioned and installed according to a hexagonal array layout, and is connected to the intelligent nutrient carrier by a biodegradable polyester fiber connecting cable to obtain a planting fixing device:

[0080] (1) The planting area is calibrated based on the hexagonal geometric layout, and six vertex positions for anchor installation are determined to obtain an array positioning coordinate set;

[0081] (2) Screw insertion installation treatment is performed on the biodegradable anchor assembly according to the array positioning coordinate set, so that the anchor barb structure is mechanically locked with the bottom material, and an anchor point array is obtained;

[0082] (3) The biodegradable polyester fiber is knitted to prepare a connecting unit with a set tensile strength and flexibility, and a flexible connecting assembly is obtained;

[0083] (4) One end of the flexible connecting assembly is connected with the anchor point array, and the other end is connected with the fixed ring node of the intelligent nutrient carrier, forming a multi-point distributed fixing structure, and the planting fixing device is obtained.

[0084] Specifically, to solve the problem of single-point stress in traditional planting fixing method, which is easy to loosen and shift under water flow disturbance, first, the coordinate calibration of the planting area is performed based on the regular hexagon geometric layout, and a plane rectangular coordinate system is established with the center position of the intelligent nutrient carrier as the origin. The circumscribed circle radius of the regular hexagon is set to 200-300 mm (the radius is determined according to the water flow impact force in the water area above 3 meters and the size of the intelligent nutrient carrier, to ensure that the anchoring range can effectively balance the water flow effect). According to the regular hexagon vertex coordinate calculation formula (x, y) = (R cos (nπ / 6), R sin (nπ / 6)), where R is the circumscribed circle radius, n is an integer between 0 and 5 (n = 0, 1, 2, 3, 4, 5), the coordinate values of the six vertices are calculated, for example, when R = 250 mm, n = 0, the coordinates are (250, 0), n = 1, the coordinates are (125, 216.5), and the specific coordinates of the six vertices are obtained in turn, forming an array positioning coordinate set. r n r n n

[0085] ​​​​​​After obtaining the array positioning coordinate set, the biodegradable anchor assembly is installed by screwing into each vertex coordinate in the coordinate set. During installation, the T-shaped pull ring at the tail of the anchor is clamped by underwater working equipment, and after aligning the coordinate point, the anchor is rotated in a clockwise direction at a speed of 5-8 revolutions per minute, so that the spiral structure (helical pitch 15-25 mm) of the anchor gradually penetrates into the seabed. During the penetration process, the barbs (barb angle 30°-45°, length 6-10 mm) on the surface of the anchor are embedded into the seabed along with the spiral structure, and when the penetration depth of the anchor reaches 2 / 3 of the total length (i.e. 80-120 mm), the rotation is stopped, at which time the barbs form a mechanical lock with the seabed. The inclined angle of the barbs allows the anchor to only penetrate deeper into the seabed and cannot be pulled out under the upward force generated by the water flow. Traditional anchors are straight rods inserted into the seabed, and the bonding force with the seabed depends only on friction, which is easy to loosen under water flow disturbance. The mechanical locking design of the spiral structure and the barbs can significantly improve the bonding strength of the anchor with the seabed, and each anchor can provide an upward force of not less than 500 N, and six anchors together form an anchor point array, providing a stable stress basis for subsequent connection.

[0086] At the same time of installing the anchors, the biodegradable polyester fibers are processed by weaving. Using plain weave technology, polyester fibers (single filament diameter 0.1-0.2 mm) are woven according to the specifications of 20x20 threads per square centimeter, and the tension is controlled uniformly during weaving to avoid local weakness caused by uneven stress on the fibers. After weaving, the connecting cable is tested for tensile strength to ensure that it reaches 800-1200 N (this strength needs to match the maximum water flow impact in deep water areas to prevent the connecting cable from being pulled apart), and its flexibility is also tested, with no breakage or fiber shedding after 50 repeated bends at a bend radius of 10 mm, meeting the installation and deformation requirements in complex underwater environments, and obtaining a flexible connection assembly. Traditional connection structures mostly use rigid rods, which cannot adapt to the small displacement of the carrier caused by the undulating seabed and water flow, and are prone to breakage due to stress concentration. The flexible connection assembly can not only provide sufficient tensile strength, but also deform with the small displacement of the carrier, avoiding stress damage of rigid connections.

[0087] One end of the flexible connecting assembly is connected with the T-shaped pull ring of each anchor in the anchor point array in a buckle fixing manner, to ensure that the tensile strength of the connection point is not less than 80% of the tensile strength of the connecting cable itself; the other end is connected with the fixing ring node at the edge of the intelligent nutrient carrier, the fixing ring nodes are uniformly distributed along the circumference of the carrier and correspond to the six anchor positions one by one. When connecting, the length of the connecting cable is adjusted according to the water depth: the length of the connecting cable in the 3-meter deep water area is set to 150 mm, the length of the connecting cable in the 4-meter deep water area is set to 200 mm, and the length of the connecting cable in the 5-meter deep water area is set to 250 mm (the length is determined according to the stability of the bottom and the water flow speed in different water depths, to ensure that the carrier will not be deformed due to the connecting cable being too short, and will not be deviated due to the connecting cable being too long). The six connecting cables are respectively connected to the fixing points of the carrier and the six anchors, to form a multi-point distributed fixing structure, that is, a planting fixing device. Traditional planting devices are mostly single-point or two-point fixed, and cannot balance the impact force of water flow in multiple directions. The multi-point distributed structure makes the pulling force received by the carrier uniformly transmitted to the anchor point array from six directions, and each anchor only bears part of the load, further reducing the stress pressure of a single anchor. Meanwhile, the deformation ability of the flexible connecting assembly can offset the shaking of the carrier caused by water flow, to solve the technical problems that the planting device is unstable and the plants are prone to lodging in deep water areas above 3 meters due to water flow disturbance.

[0088] The above describes the intelligent planting method of submersed plants based on bionic light compensation in the embodiments of the present application. The intelligent planting system of submersed plants based on bionic light compensation in the embodiments of the present application is described below. Please refer to Figure 3 An embodiment of the intelligent planting system of submersed plants based on bionic light compensation in the embodiments of the present application includes:

[0089] An anchoring module is used to construct a flexible planting base of bionic anemone tentacle structure. The base is provided with 8-12 shape memory polyurethane fixing arms and a silica gel suction cup base. The surface of the fixing arm has a micro barb structure, to obtain a bionic anchoring unit.

[0090] A loading module is used to prepare three-layer coated gradient nutrient slow-release microcapsules. The inner layer is a nitrogen, phosphorus and potassium nutrient substrate, the middle layer is an ethyl cellulose controlled-release film, and the outer layer is a sodium alginate trigger film. The microcapsules are loaded into the nutrient slow-release cavity of the bionic anchoring unit, to form an intelligent nutrient carrier.

[0091] A calculation module is used to calculate the water depth spectral attenuation coefficient by a plant chlorophyll fluorescence decay rate inversion algorithm. The algorithm combines chlorophyll fluorescence kinetic parameters and water optical properties. The light compensation demand of each depth layer is inversely calculated according to the fluorescence decay gradient, to generate depth adaptive light compensation parameters.

[0092] The connecting module is used for preparing the spiral barb anchor by using the modified polyhydroxybutyric acid valerate, the anchor is arranged in a regular hexagonal array, and is fixedly connected with the intelligent nutrition carrier through the degradable polyester fiber connecting rope.

[0093] The application further provides a computer readable storage medium, which can be a nonvolatile computer readable storage medium or a volatile computer readable storage medium, and instructions are stored in the computer readable storage medium, and the instructions make a computer execute steps of the intelligent planting method of the submersed plant based on the bionic light compensation when the instructions are run on the computer.

[0094] The above examples are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for intelligent planting of submerged plants based on biomimetic light compensation, characterized in that, The system comprises: Step S1, constructing a flexible planting base of bionic anemone tentacle structure, the base is provided with 8-12 shape memory polyurethane fixing arms and a silica gel suction cup base, the surface of the fixing arm has a micro barb structure, and a bionic anchoring unit is obtained; Step S2, preparing three-layer coated gradient nutrient slow-release microcapsules, the inner layer is a nitrogen, phosphorus and potassium nutrient matrix, the middle layer is an ethyl cellulose controlled-release film, and the outer layer is a sodium alginate trigger film, the microcapsules are loaded into the nutrient slow-release cavity of the bionic anchoring unit to form an intelligent nutrient carrier; Step S3, calculating the water depth spectral attenuation coefficient by a plant chlorophyll fluorescence decay rate inversion algorithm, the algorithm combines chlorophyll fluorescence kinetic parameters and water optical properties, the light compensation requirement of each depth layer is inversely calculated according to the fluorescence decay gradient, and depth-adapted light compensation parameters are generated; Step S4, preparing a spiral barb anchor by using modified polyhydroxybutyrate valerate, the anchor is arranged in a regular hexagonal array, and is fixedly connected with the intelligent nutrient carrier through a degradable polyester fiber connecting rope, and the depth-adapted light compensation parameters are combined to realize intelligent planting of submerged plants.

2. The method of claim 1, wherein the method is characterized by, The step S1 comprises: The polydimethylsiloxane material is processed by concentric circular texture based on the anemone suction cup attachment mechanism to obtain a silica gel suction cup base; The shape memory polyurethane material is processed by laser microprocessing to form a micro barb structure on the surface of the fixing arm to obtain a flexible anchoring arm assembly; The flexible anchoring arm assembly is fixed to the edge of a polylactic acid-glycolic acid copolymer base according to the circumferential equal division angle to assemble a tentacle-shaped fixing structure to obtain the bionic anchoring unit; The bionic anchoring unit is pretreated by soaking in nutrient solution to form a hydrophilic film layer on the surface of the base to obtain a biocompatible planting base.

3. The method of claim 1, wherein the method further comprises: The step S2 comprises: Ammonium nitrate, potassium dihydrogen phosphate and potassium sulfate are mixed and granulated according to a set mass ratio to obtain nitrogen, phosphorus and potassium nutrient matrix particles; Ethyl cellulose and polylactic acid materials are blended and coated to form a controlled-release film layer on the surface of the nutrient matrix particles to obtain double-coated particles; A sodium alginate solution is sprayed to form a trigger film layer on the surface of the double-coated particles to obtain the three-layer coated gradient nutrient slow-release microcapsules; The microcapsules are mixed and loaded according to a set ratio of fast-release type, medium-release type and slow-release type, and are filled into the nutrient slow-release cavity of the bionic anchoring unit to obtain the intelligent nutrient carrier.

4. The method of claim 1, wherein the method further comprises: The step S3 comprises: Spectral quantum sensor is used to collect red light, blue light and far-red light photon flux density data at different water depths to obtain layered spectral attenuation data sets; Plant leaves are irradiated by excitation light, the chlorophyll fluorescence emission intensity is detected, and the chlorophyll fluorescence decay rate parameters are calculated to obtain chlorophyll fluorescence kinetic parameters; Based on the chlorophyll fluorescence kinetic parameters, the layered spectral attenuation data sets are calculated and processed to calculate the photosynthetically active radiation requirement and the environmental light intensity difference of each depth layer to obtain light compensation requirement data; The light compensation requirement data are converted into LED lamp bead red and blue light ratio and PWM modulation duty cycle parameters to generate the depth-adapted light compensation parameters for different water depths.

5. The method of claim 4, wherein the method further comprises: The plant leaves are irradiated with excitation light, the chlorophyll fluorescence emission intensity is detected, and the chlorophyll fluorescence kinetic parameters are calculated, including: The plant leaves are irradiated with excitation light at a wavelength of 630 nm, the chlorophyll molecules are excited to produce fluorescence emission, and the initial fluorescence signal is obtained; The change in the chlorophyll fluorescence emission intensity at a wavelength of 685 nm is detected by a photomultiplier tube, the data sequence of the fluorescence intensity decay over time is recorded, and the fluorescence decay curve is obtained; The fluorescence decay curve is fitted with an exponential function, the time constant and decay rate parameters of the fluorescence intensity decay are calculated, and the fluorescence decay kinetic characteristic values are obtained; The maximum fluorescence yield, steady-state fluorescence intensity, and photochemical quenching coefficient are calculated based on the fluorescence decay kinetic characteristic values, and the chlorophyll fluorescence kinetic parameters are obtained.

6. The method of claim 1, wherein the method further comprises: The step S4 comprises: A natural fiber is added to the polyhydroxybutyric acid valeric acid ester material for modification and enhancement treatment to obtain a modified anchor material; The modified anchor material is subjected to spiral barb structure forming treatment to prepare anchor monomers with spiral lead and barb angles, and a biodegradable anchor assembly is obtained; The biodegradable anchor assembly is positioned and installed in a hexagonal array layout, connected to the intelligent nutrient carrier through a degradable polyester fiber connecting cable, and a planting fixing device is obtained; The LED light supplementing device is real-time regulated based on the depth-adaptive light compensation parameters, and the planting operation of the submerged plant is completed with the planting fixing device to obtain a stable planted submerged plant community.

7. The method of claim 6, wherein the method further comprises: The biodegradable anchor assembly is positioned and installed in a hexagonal array layout, connected to the intelligent nutrient carrier through a degradable polyester fiber connecting cable, and a planting fixing device is obtained, comprising: The coordinate calibration of the planting area is performed based on the hexagonal geometric layout to determine the positions of the six vertices of the anchor installation, and an array positioning coordinate set is obtained; The biodegradable anchor assembly is inserted and installed in a spiral manner according to the array positioning coordinate set, so that the anchor barb structure is mechanically locked with the substrate to obtain an anchor point array; The degradable polyester fiber is knitted to prepare a connecting cable unit with a set tensile strength and flexibility, and a flexible connecting assembly is obtained; One end of the flexible connecting assembly is connected to the anchor point array, and the other end is connected to the fixed ring node of the intelligent nutrient carrier to form a multi-point distributed fixing structure, and the planting fixing device is obtained.

8. An intelligent planting system for submerged plants based on biomimetic light compensation, characterized in that, The bionic light compensation-based intelligent planting system of the submerged plant is used to implement the bionic light compensation-based intelligent planting method of the submerged plant according to any one of claims 1-7, comprising: An anchoring module is used to construct a flexible planting disc of bionic anemone tentacle structure, the disc is provided with 8-12 shape memory polyurethane fixing arms and a silica gel suction cup base, the surface of the fixing arm has a micro barb structure, and a bionic anchoring unit is obtained. A loading module for preparing a three-layer gradient nutrient slow-release microcapsule, the inner layer being a nitrogen, phosphorus and potassium nutrient substrate, the middle layer being an ethyl cellulose controlled-release film, and the outer layer being a sodium alginate trigger film, the microcapsule being loaded into the nutrient slow-release cavity of the biomimetic anchoring unit to form an intelligent nutrient carrier; An estimation module for calculating the water depth spectral attenuation coefficient by a plant chlorophyll fluorescence decay rate inversion algorithm, the algorithm fusing chlorophyll fluorescence kinetic parameters and water body optical properties, and inversely calculating the light compensation requirement of each depth layer according to the fluorescence decay gradient to generate depth-adapted light compensation parameters; A connecting module for preparing a spiral inverted barb anchor by using modified polyhydroxybutyrate valerate, the anchor being arranged in a regular hexagonal array, and being fixedly connected with the intelligent nutrient carrier through a degradable polyester fiber connecting rope, and realizing intelligent planting of submerged plants in combination with the depth-adapted light compensation parameters.

9. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by a processor to perform the biomimetic light compensation-based intelligent planting method of submerged plants according to any one of claims 1 to 7.

Images