Application method and system of near-infrared electromagnetic wave conversion material for rapid breeding of crops

Abstract

The invention relates to an application method and system of a near-infrared electromagnetic wave conversion material for rapid breeding of crops. The system comprises a sprayer, an acquisition unit and a central control unit, and a near-infrared electromagnetic wave conversion material is stored in the sprayer in a manner of being configured into turbid liquid. The sprayer can respond to a control signal generated after the central control unit carries out operation processing based on the data information acquired by the acquisition unit, and the suspension of the near-infrared electromagnetic wave conversion material is sprayed to plants in the planting area and is attached to the leaf surfaces of the plants. The method comprises the following steps: preparing a near-infrared electromagnetic wave conversion material into turbid liquid and storing the turbid liquid in a sprayer; data information related to the plant growth state is obtained, the plant growth state in the planting area is analyzed, and working parameters of the sprayer are determined accordingly; and spraying the turbid liquid of the near-infrared electromagnetic wave conversion material to the plants in the planting area and attaching the turbid liquid to the leaf surfaces of the plants.

Description

Technical Field

[0001] The present invention relates to the technical field of rapid crop propagation in a laboratory, and in particular to an application method and system of a near-infrared electromagnetic wave conversion material for rapid crop propagation. Background Art

[0002] Near-infrared electromagnetic wave conversion materials are characterized by emitting high-energy light when excited by low-energy light. In other words, when excited by long-wavelength, low-frequency light, the material emits short-wavelength, high-frequency light. Near-infrared electromagnetic wave conversion materials have numerous applications in solid-state lasers, anti-counterfeiting, and other fields.

[0003] For example, CN111681532A discloses a multi-level anti-counterfeiting material with three-primary-color orthogonal up-conversion fluorescence characteristics and its application, which belongs to the technical field of fluorescent anti-counterfeiting materials. The anti-counterfeiting material of this invention is composed of five-shell core-shell structure nanoparticles with three-primary-color orthogonal up-conversion luminescence and disappearing ink; the five-shell core-shell structure nanoparticles are composed of NaYF4 main matrix doped with sensitizer and activator. This anti-counterfeiting material can not only produce independent three-primary-color up-conversion luminescence under the excitation of three different wavelengths of near-infrared light, but also has the characteristics of pH stimulation response under natural light. The anti-counterfeiting material provided by this invention not only expands the application range of orthogonal luminescent nanomaterials, but also solves some problems of traditional anti-counterfeiting materials such as single anti-counterfeiting technology, low security and easy copying, thereby increasing the level of security and anti-counterfeiting. This invention can be used for multi-level anti-counterfeiting of confidential information.

[0004] In addition to the application of near-infrared electromagnetic wave conversion materials in fields such as anti-counterfeiting as disclosed in the above-mentioned patent, based on the characteristic that near-infrared electromagnetic wave conversion materials can emit short-wavelength light when excited by long-wavelength light, they can be applied in the field of agricultural breeding to further utilize the near-infrared energy zone in sunlight, thereby improving the utilization rate of solar energy.

[0005] For example, CN110278860A discloses a nano-light conversion technology for leaf surfaces that promotes plant photosynthesis. The resulting nanocomposite luminescent material is formulated into a suspension and sprayed on the surface of bean sprout leaves. This converts the surface light (absorbing near-infrared light and emitting red light), thereby promoting the photosynthetic rate of the sprouts and enabling fluorescence imaging of the sprout leaves. The composite nanoparticles produced by this invention exhibit excellent water dispersibility and stability, showing potential applications in light-based agriculture and plant imaging.

[0006] The prior art only demonstrates that spraying a suspension of near-infrared electromagnetic wave conversion material onto the surface of plant leaves can promote the photosynthetic rate of the plant, thereby promoting plant growth and development. However, it does not address how to spray the suspension, particularly how to determine a targeted spraying method for plants with different arrangements and / or different growth states within the planting area. Excessive use of near-infrared electromagnetic wave conversion material will not only waste resources due to a reduced effective utilization rate of the near-infrared electromagnetic wave conversion material, but will also cause excess suspension to excessively penetrate into the plant's culture medium, potentially destroying the carefully designed culture conditions. Excessive use of near-infrared electromagnetic wave conversion material will result in insufficient suspension attached to the plant leaves to effectively convert near-infrared rays, thereby reducing the overall utilization rate of sunlight.

[0007] In addition, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making the present invention, but due to space limitations, not all details and contents are listed in detail. However, this does not mean that the present invention does not have the characteristics of these prior arts. On the contrary, the present invention already has all the characteristics of the prior art, and the applicant reserves the right to add relevant prior art to the background technology. Summary of the Invention

[0008] The preparation cost of the near-infrared electromagnetic wave conversion materials (doped with rare earth elements) used in existing technologies is high. Although this technology currently has special significance for special applications such as outer space agriculture, the number of near-infrared electromagnetic wave conversion materials that have been proven to be safe and effective for plants is extremely limited. Other electromagnetic wave conversion materials with similar properties need to be developed. To achieve this, it is also necessary to efficiently and quantitatively calculate the application amount of the corresponding materials and their corresponding effects.

[0009] To this end, the task of the present invention is first to provide a method for accurately applying near-infrared electromagnetic wave conversion materials, aiming to quantitatively and accurately determine the application amount according to the fluorescence analysis results on the leaves, and then apply them in a cost-optimized manner.

[0010] Another task of the present invention is to provide a device and method for spraying near-infrared electromagnetic wave conversion materials on plants, which aims to quantitatively determine the fluorescence conversion efficiency of the near-infrared electromagnetic wave conversion materials applied to plant leaves and their impact on the photosynthesis of the corresponding plants.

[0011] Another task of the present invention is to provide a method for determining the application amount of near-infrared electromagnetic wave conversion material, which aims to determine the application parameters in an efficient and cost-optimal manner according to the spectrum required by the corresponding plant type.

[0012] In response to the shortcomings of the existing technology, the present invention provides an application method and system for near-infrared electromagnetic wave conversion materials for rapid crop propagation to solve at least some of the above-mentioned technical problems. The present invention provides an innovative and efficient solution for greenhouse cultivation by integrating advanced spectral conversion technology and intelligent control. In this system, the sprayer, collection unit and central control unit work together to form a closed-loop control system that can accurately adjust the application strategy of the near-infrared electromagnetic wave conversion material according to the actual growth needs of the plant. First, by using near-infrared electromagnetic wave conversion materials, the system can efficiently convert near-infrared light in natural light that is not directly used by plants into red light or blue light, both of which are necessary for plants to photosynthesize. This process not only improves the utilization rate of light energy, but also significantly enhances the photosynthetic efficiency of plants in environments with poor lighting conditions (such as winter or cloudy days), thereby promoting crop growth. Due to the high energy density of near-infrared light, the visible light generated after conversion can more effectively stimulate chlorophyll, thereby increasing the photosynthetic rate, which helps to increase crop yield and improve quality. Secondly, the system's data acquisition unit is equipped with a multi-sensor combination, including a primary acquisition unit for measuring chlorophyll fluorescence, a secondary acquisition unit for obtaining vegetation reflectance spectra, and a tertiary acquisition unit for monitoring light intensity and spectral distribution. This data collection enables the central control unit to comprehensively understand the plant's photosynthetic status and environmental conditions, and to calculate key evaluation parameters: the chlorophyll fluorescence signal and the spectral absorption index. These two parameters comprehensively reflect a plant's absorption capacity for different wavelengths of light and its photosynthetic efficiency, going beyond the traditional assessment based solely on the ratio of red to blue light. In particular, the introduction of the spectral absorption index as a new evaluation metric, accounting for the influence of near-infrared light, significantly enhances the understanding and optimization of plant spectral resource utilization efficiency. Finally, the central control unit calculates the comprehensive evaluation indicator, the Growth Status Parameter (GSP), based on these evaluation parameters, further improving the accuracy and timeliness of the system's plant health assessment. GSP trends directly reflect changes in plant photosynthetic efficiency and light energy utilization efficiency, thereby guiding subsequent management measures. When the GSP deviates from the ideal value, the central control unit automatically adjusts sprinkler operating parameters, such as spraying pressure, to ensure optimal photosynthesis. This dynamic adjustment mechanism ensures that the system is always in the optimal operating state, reduces unnecessary energy consumption, and also reduces production costs.

[0013] The present invention discloses an application system for rapidly propagating crops using near-infrared electromagnetic wave conversion materials. The system comprises a sprayer for storing and spraying the near-infrared electromagnetic wave conversion material; a collection unit for acquiring data related to plant growth; and a central control unit for analyzing the plant growth status within a planting area based on the data acquired by the collection unit and determining the operating parameters of the sprayer accordingly. The near-infrared electromagnetic wave conversion material is stored in the sprayer as a suspension. The sprayer responds to control signals generated by the central control unit after processing the data acquired by the collection unit, spraying the suspension of the near-infrared electromagnetic wave conversion material onto the plants within the planting area, where it adheres to the leaf surfaces of each plant.

[0014] According to a preferred embodiment, the sprayer includes a liquid storage tank for storing the suspension to be sprayed, a conveying component for conveying the suspension from the liquid storage tank to the nozzle, and a nozzle for spraying the suspension, wherein the sprayer is provided with a pressure regulating valve for controlling the spraying pressure, and the pressure regulating valve is communicatively connected to the central control unit to receive a control signal issued by the central control unit.

[0015] According to a preferred embodiment, the acquisition unit includes a first acquisition part for measuring chlorophyll fluorescence of plants in the planting area, a second acquisition part for obtaining the vegetation reflectance spectrum in the planting area, and a third acquisition part for obtaining the light intensity and spectral distribution around the plants in the planting area, so as to respectively obtain the maximum photochemical efficiency, normalized vegetation index and photosynthetic photon flux density in multiple bands.

[0016] According to a preferred embodiment, the central control unit can calculate the following evaluation parameters based on various types of data information obtained by the acquisition unit: chlorophyll fluorescence signal, which is used to characterize the photosynthetic activity and photosynthetic efficiency of the plant; spectral absorption index, which is used to evaluate the current plant's spectral resource utilization efficiency, wherein the maximum photochemical efficiency can be used to calculate the chlorophyll fluorescence signal, and the normalized vegetation index and photosynthetic photon flux density in multiple bands can be used to calculate the spectral absorption index.

[0017] According to a preferred embodiment, the central control unit can integrate the chlorophyll fluorescence signal and the spectral absorption index to calculate the growth status parameters as comprehensive evaluation indicators to dynamically evaluate the growth health of the plant, thereby directly reflecting the photosynthesis efficiency and light energy utilization efficiency.

[0018] According to a preferred embodiment, the central control unit can dynamically adjust the working parameters of the sprayer according to the deviation between the target value and the current value of the growth state parameter, wherein the working parameters of the sprayer include the spraying pressure of the pressure regulating valve, so as to change the application amount of the suspension sprayed from the sprayer by adjusting the spraying pressure of the pressure regulating valve.

[0019] According to a preferred embodiment, the application system further comprises a mobile unit for moving within the planting area, and the sprayer and the collection unit can be mounted on the mobile unit and can move within the planting area along with the mobile unit.

[0020] According to a preferred embodiment, the moving unit is configured as a sliding member capable of sliding on a slide rail, and is capable of moving from a starting position to an end position along a first trajectory, and then returning from the end position to the starting position along a second trajectory after a delay time, wherein the second trajectory coincides with the first trajectory in line but is in the opposite direction to the first trajectory.

[0021] According to a preferred embodiment, the central control unit can generate a curve graph showing the change of the corresponding growth status parameters over time for each plant, wherein the curve graph includes an expected curve and an actual curve, wherein the central control unit can analyze the spraying operation based on the comparison of the two curves.

[0022] The present invention also discloses an application method of near-infrared electromagnetic wave conversion material for rapid crop propagation, which comprises the following steps:

[0023] The near-infrared electromagnetic wave conversion material is configured as a suspension and stored in a sprayer;

[0024] Obtain data information related to plant growth status, analyze plant growth status in the planting area, and use this to determine the operating parameters of the sprayer;

[0025] The suspension of the near-infrared electromagnetic wave conversion material is sprayed onto the plants in the planting area and adheres to the surface of the leaves of each plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a hardware connection diagram of the application system provided by the present invention;

[0027] Figure 2 This is a schematic diagram of data transmission and processing in the application system provided by the present invention;

[0028] Figure 3 It is a structural schematic diagram of the mobile unit provided by the present invention;

[0029] Figure 4 It is a moving trajectory diagram of the mobile unit provided by the present invention in a planting area where plants are planted in rows;

[0030] Figure 5 is a graph showing the GSP generated by the central control unit provided by the present invention changing with time;

[0031] Figure 6 It is a flowchart of the steps of the application method provided by the present invention.

[0032] Reference Signs List

[0033] 100: Sprayer; 110: Liquid storage tank; 120: Conveying component; 130: Nozzle; 140: Pressure regulating valve; 200: Collection unit; 210: First collection part; 220: Second collection part; 230: Third collection part; 300: Central control unit; 400: Moving unit; 410: First track; 420: Second track. DETAILED DESCRIPTION

[0034] Near-infrared electromagnetic wave conversion materials can emit high-energy light when excited by low-energy light, that is, when excited by long-wavelength, low-frequency light, near-infrared electromagnetic wave conversion materials can emit short-wavelength, high-frequency light.

[0035] Preferably, near-infrared electromagnetic wave conversion materials are applied in the field of agricultural planting, so that when sunlight is used to illuminate plants, the near-infrared energy zone in sunlight that is more difficult for plants to directly utilize can be converted into an effective energy zone that can directly affect the growth and development of plants through the near-infrared electromagnetic wave conversion materials, thereby helping to promote plant photosynthesis, wherein the effective energy zone may include blue light, red light and / or far-red light.

[0036] Preferably, the near-infrared electromagnetic wave conversion material can be a solid compound doped with rare earth elements, which utilizes the metastable energy level characteristics of rare earth elements to absorb multiple low-energy long-wave radiations, thereby converting infrared light into visible light.

[0037] For example, Er 3+ 、Yb 3+ Co-doped RYF4 (R = Li, Na) is used as a near-infrared electromagnetic wave conversion material, wherein RYF4 is preferably NaYF4. The matrix material that generally does not constitute the excitation light energy level can provide a suitable crystal field for the activated ions, so that they produce suitable emission. On the one hand, considering the phonon energy of the material, it is generally believed that the conversion excitation light efficiency of different matrix materials is ranked as follows: chloride>fluoride>oxide; on the other hand, considering the stability of the material structure, it is generally believed that the excitation light efficiency of different matrix materials is ranked as follows: chloride<fluoride<oxide. Therefore, a fluoride matrix material with both high conversion efficiency and structural stability can be used as a preferred option. Furthermore, NaYF4 is the matrix material with the lowest phonon energy and the highest fluorescence efficiency among the current fluoride conversion materials. Under normal conditions, NaYF4 has two crystal forms, one is the cubic phase α-NaYF4, and the other is the hexagonal phase β-NaYF4. Among them, the hexagonal phase (β-) crystal has a relatively lower phonon energy (<400cm -1 ), the crystal has strong thermal and optical stability, good light transmittance, low non-radiative decay rate and high radiation emission frequency.

[0038] Preferably, in order to make the emission wavelength of the near-infrared electromagnetic wave conversion material fall more within the red wavelength range, carbon dots can be used to adjust the red-green emission ratio based on the use of NaYF4:Yb,Er, thereby promoting plant photosynthesis by increasing the red light emission ratio. Furthermore, after adding carbon dots, the near-infrared electromagnetic wave conversion material is a NaYF4:Yb,Er / carbon dot nanocomposite material, which can be prepared as follows:

[0039] S1. Preparation of SiO2 sol;

[0040] S2. Preparation of NaYF4:Yb,Er nanoparticles;

[0041] S3. Preparation of carbon dots;

[0042] S4. Preparation of NaYF4:Yb,Er / carbon dot nanocomposites.

[0043] Preferably, in step S1, TEOS, EtOH, deionized water, and hydrochloric acid are mixed and refluxed at 100°C, and the pH is adjusted to 2 to obtain a SiO2 sol. Furthermore, the obtained SiO2 sol must be refrigerated before use, wherein the refrigeration temperature may be -4°C. SiO2 can serve as an intermediate between NaYF4 and carbon dots to transfer energy; it can also serve as a surface modification agent for NaYF4; and it can also play a role in surface state conversion, grafting other functional groups or metal ions onto the surface.

[0044] Preferably, in step S2, anhydrous ethanol can be added to the mixture cooled to room temperature after the hydrothermal treatment, and the NaYF4:Yb,Er nanoparticles can be obtained after centrifugal separation and drying. The mixture can be prepared by adding an aqueous solution containing YCl3, YbCl3, and ErCl3 and NaF to a uniform mixture of oleic acid, sodium hydroxide, anhydrous ethanol, and deionized water under vigorous stirring, followed by heating under reflux and stirring. Furthermore, the hydrothermal treatment can be carried out in a polytetrafluoroethylene-lined reactor.

[0045] Preferably, in step S3, citric acid and thiourea can be mixed in acetone for hydrothermal treatment, and then dissolved in ethanol after centrifugation and washing to obtain a carbon dot solution (CDs solution). The supernatant can be washed with petroleum ether and ethyl acetate. Furthermore, the hydrothermal treatment can be performed in a polytetrafluoroethylene-lined reactor.

[0046] Preferably, in step S4, the prepared NaYF4:Yb,Er nanoparticles are added to the SiO2 sol, and then the carbon dot solution is added to stir and mix to form a uniform gel mixed system. The gel mixed system is dried and ground to obtain a NaYF4:Yb,Er / carbon dot nanocomposite material.

[0047] Preferably, the near-infrared electromagnetic wave conversion material can be formulated into a suspension and sprayed onto the surface of plant leaves according to a predetermined method. This method is preferably applicable to greenhouses that rely primarily on sunlight for illumination. By converting the wavelength of light on the leaf surface through the near-infrared electromagnetic wave conversion material, plants in the greenhouse can more fully utilize sunlight during the daylight period. Preferably, the suspension forms uniform droplets on the surface of the plant leaves.

[0048] Preferably, when NaYF4:Yb,Er / carbon dot nanocomposite material is used as near-infrared electromagnetic wave conversion material, the agglomerated nanoparticles can stably adhere to the leaf surface and, by converting light on the leaf surface, increase the photosynthetic rate, transpiration rate, stomatal conductance, chlorophyll content, leaf number and leaf area of the plant leaves.

[0049] Example 1

[0050] Based on the above, the present invention discloses an application system for rapid crop propagation of near-infrared electromagnetic wave conversion materials, such as Figure 1 As shown, the application system may include: a sprayer 100 for containing and spraying near-infrared electromagnetic wave conversion material; a collection unit 200 for acquiring data information related to the growth status of plants; and a central control unit 300 for analyzing the growth status of plants in the planting area according to the sampling information acquired by the collection unit 200, and determining the working parameters of the sprayer 100 accordingly.

[0051] Preferably, the sprayer 100 may include a liquid storage tank 110 for storing the suspension to be sprayed, the inner cavity of which has sufficient capacity and can be designed to avoid particle sedimentation, for example, a conical bottom structure can be used to facilitate emptying. Preferably, the sprayer 100 may include a delivery component 120 for delivering the suspension from the liquid storage tank 110 to the nozzle 130. The inlet of the delivery component 120 may be provided with a filter for filtering out possible large particulate matter to prevent them from entering the nozzle 130 and causing clogging. The delivery component 120 may be a diaphragm pump, a gear pump, or other pump type suitable for delivering liquids containing solid particles.

[0052] Preferably, the sprayer 100 may include a pressure regulating valve 140 for controlling the spraying pressure to ensure that the suspension can be sprayed at an appropriate flow rate and atomization degree, wherein the pressure regulating valve 140 may be regulated by the central control unit 300. Preferably, the sprayer 100 may also include a flow meter for monitoring the actual amount of suspension sprayed to ensure that the suspension is sprayed according to preset parameters.

[0053] Preferably, the sprayer 100 may include a nozzle 130 for spraying the suspension, and the nozzle 130 may be connected to a spray rod or a spray arm to adjust its length and angle according to the plant height and planting row spacing. The nozzle 130 may be selected according to the characteristics of the suspension. Suitable types, such as fan nozzles, conical nozzles or vortex nozzles, can be selected to ensure good atomization effect and coverage.

[0054] Preferably, if Figure 2 As shown, the collection unit 200 may include a first collection unit 210 for measuring chlorophyll fluorescence of plants within the planting area. Chlorophyll fluorescence measurement is based on the natural characteristics of plant photosynthesis: when the reaction center of photosystem II (PSII) absorbs light energy, the excess energy is released as fluorescence. The intensity of the fluorescence signal directly reflects the efficiency of PSII and can be used to assess the photosynthetic state of the plant, that is, whether the plant can efficiently utilize light energy. Preferably, the first collection unit 210 can be configured as a fluorescence imaging system or a portable fluorescence meter, which includes the following hardware: an excitation light source: an LED light source with a specific wavelength (usually blue or red light, with a wavelength range of approximately 400-700 nm) is used to stimulate the fluorescence response of plant leaves; an optical filter: filters out direct light from the excitation light source, allowing only the plant fluorescence signal (generally in the 680 nm and 740 nm bands) to pass; a high-sensitivity detector: such as a photomultiplier tube (PMT) or a high-resolution CMOS / CCD camera, is used to capture the fluorescence signal; and a data acquisition module: connects to the detector and transmits data to the central control unit 300 in real time.

[0055] Preferably, after receiving the data information obtained by the first acquisition unit 210, the central control unit 300 can convert the fluorescence signal into a quantifiable photosynthesis index, namely the maximum photochemical efficiency (Fv / Fm), which is calculated as follows:

[0056] Fv / Fm=(Fm-Fo) / Fm,

[0057] Wherein, Fv is the variable fluorescence, Fm is the maximum fluorescence, and Fo is the initial fluorescence intensity.

[0058] Preferably, when processing the data information acquired by the first acquisition unit 210, the central control unit 300 may use dedicated bioimaging software (such as FluoView or a custom algorithm) to analyze the fluorescence intensity distribution and generate a heat map to display the spatial differences in plant photosynthesis efficiency. Preferably, when processing the data information acquired by the first acquisition unit 210, the central control unit 300 may also combine a fluorescence dynamics model (such as the Kautsky effect) to generate a chlorophyll fluorescence dynamics curve for the plant.

[0059] Preferably, if Figure 2 As shown, the acquisition unit 200 may include a second acquisition unit 220 for acquiring the vegetation reflectance spectrum within the planting area to determine the vegetation index of the plant, in particular the Normalized Difference Vegetation Index (NDVI), to assess the health status and leaf cover of the plant, wherein a higher NDVI value means that the plant is in a better growth state. Preferably, the second acquisition unit 220 can be configured as a multispectral camera or a hyperspectral camera, which includes the following hardware: a multispectral camera: with multi-channel, high spectral resolution, capable of capturing reflected light in multiple bands (such as red light and near-infrared light); a narrow-band filter or a spectroscopic prism: for accurately separating the red light (620-750nm) and near-infrared light (750-900nm) bands; a GPS and IMU module: providing accurate geographic location and attitude data.

[0060] Preferably, after receiving the data information obtained by the second acquisition unit 220, the central control unit 300 may first perform a preprocessing operation, that is, eliminate the influence of sunlight intensity changes and terrain through radiation correction and geometric correction, and then calculate NDVI using the following formula:

[0061]

[0062] Among them, NIR is the spectral reflectance of the near-infrared band, and RED is the spectral reflectance of the red band.

[0063] Exemplarily, the second acquisition unit 220 may include a first sensor for acquiring light intensity and a second sensor for acquiring plant images, wherein the first sensor and the second sensor may be arranged in approximately opposite directions. The first sensor may be arranged with an opening oriented along a first direction, and the second sensor may be arranged with an opening oriented in a direction opposite to the first direction, wherein the first direction is approximately a direction pointing vertically from the ground to the sky. Furthermore, the first sensor may be configured with a plurality of equal first and second light channels, wherein any first light channel may be connected to its corresponding second light channel, and the first light channel may be located in the first direction of the second light channel. Preferably, the diffusion component of the first light channel may be arranged in the first direction of the lens component of the first light channel, and a detection component, a filter component, and a protection component may be arranged in sequence in the second light channel along the first direction. Furthermore, after sunlight enters the first light channel, due to the increase in the transmittance of sunlight by the diffusion component, more light enters the first light channel and is converged by the lens component, wherein the lens component is a convex lens capable of converging light. A protective assembly made of polytetrafluoroethylene (PTFE) is positioned between the lens assembly and the filter assembly to protect the optical components, thereby preventing damage caused by collision between the lens assembly and the filter assembly. Light focused by the lens assembly passes through the protective assembly to the filter assembly. The filter assembly can be equipped with corresponding filters based on specified wavelengths, allowing the filtered light to be detected by the detection assembly, obtaining the intensity of sunlight at the specified wavelength and transmitting it to the central control unit 300 in the form of an electrical signal for processing. The detection assembly can utilize a PIN-type photodiode. The resulting electrical signal must first be converted from current to voltage and amplified before being transmitted to the central control unit 300. Preferably, the number of first and second optical channels in the first sensor can be determined based on the number of specified wavelengths. That is, for each specified wavelength, the first sensor adds a first and second optical channel corresponding to the specified wavelength, and a filter assembly corresponding to the specified wavelength is provided in the corresponding second optical channel. Furthermore, when the first sensor is configured with multiple first channels and second channels, it can be arranged in a variety of arrangements, that is, there is no limit on the arrangement between channels of the same type, at least ensuring that all first channels and their corresponding second channels are arranged in a position-corresponding manner. Optionally, several points can be selected from the spectrum as designated wavelengths, wherein, in order to judge the impact of near-infrared electromagnetic wave conversion materials on light and plant growth, the points selected in the spectrum can at least cover visible light and near-infrared light to obtain grayscale images of the current plant at different wavelengths. Preferably, within the range of visible light, the designated wavelength can select at least one point based on the color of the light, wherein the light color of the selected point can include one or more of blue light, green light and red light; within the range of near-infrared light, the designated wavelength can be further limited to selecting at least one point within the range of near-infrared shortwave.Preferably, the second sensor may be configured with a plurality of multi-band imaging sensors or cameras to obtain grayscale images of the current plant at multiple specified wavelengths in sunlight, and transmit the grayscale image of the current plant at each specified wavelength to the central control unit 300. Preferably, the central control unit 300 may calculate the spectral reflectance of the current plant at each specified wavelength based on the light intensity at each specified wavelength and the grayscale value of each pixel in the corresponding plant image, thereby calculating the normalized difference vegetation index (NDVI) based on the spectral reflectance.

[0064] Preferably, if Figure 2 As shown, the acquisition unit 200 may include a third acquisition unit 230 for acquiring the light intensity and spectral distribution surrounding the plants within the planting area to assess the current near-infrared light intensity and the amount of light actually absorbed by the plants. Preferably, the third acquisition unit 230 may be configured as a light sensor or a spectrum analyzer to monitor photosynthetic photon flux density (PPFD) and its spectral composition, particularly the photosynthetic photon flux density in the near-infrared band.

[0065] Preferably, the central control unit 300 that receives the data information obtained by the third acquisition unit 230 can extract the photosynthetic photon flux density (PPFD) of the red light band. red ), photosynthetic photon flux density (PPFD) in the blue light band blue ), photosynthetic photon flux density (PPFD) in the near-infrared band NIR ) and total photosynthetic photon flux density (PPFD) within the range of photosynthetically active radiation (PAR) total ), and the sum of the photosynthetic photon flux density (PPFD) of the red and blue light bands can be calculated. red / blue ), which is the sum of the number of red and blue light photons irradiated per unit area per unit time. Its physical meaning is: the effective light intensity of the two most critical light bands (red light and blue light) received by plants.

[0066] Preferably, the central control unit 300 can calculate two evaluation parameters based on various types of data information obtained by the acquisition unit 200, one of which is the chlorophyll fluorescence signal (Φ), which is used to characterize the photosynthetic activity and photosynthetic efficiency of the plant; the other is the spectral absorption index (SAI), which is based on the spectral absorption of red, blue and near-infrared light by the plant, and comprehensively considers the spectral utilization efficiency and near-infrared conversion efficiency, so as to evaluate the current plant's spectral resource utilization efficiency.

[0067] Preferably, the chlorophyll fluorescence signal (Φ) can be calculated by the maximum photochemical efficiency, wherein the calculation formula is:

[0068] Φ=Fv / Fm·K,

[0069] Among them, Fv / Fm is the maximum photochemical efficiency; K is the correction factor, which can be corrected by other data (such as NDVI or canopy temperature).

[0070] Preferably, the spectral absorption index (SAI) can be calculated by NDVI and photosynthetic photon flux density of multiple bands, wherein the calculation formula is:

[0071]

[0072] Among them, NDVI is the normalized difference vegetation index; PPFD is red / blue It is the sum of the photosynthetic photon flux density in the red light band and the blue light band; PPFD total is the total photosynthetic photon flux density within the range of photosynthetically active radiation (PAR); PPFD NIR is the photosynthetic photon flux density in the near-infrared band; a, b, and c are weight factors.

[0073] Preferably, the present invention takes into account the influence of the conversion efficiency of the near-infrared band when assigning the above-mentioned weight factor c. If the near-infrared electromagnetic wave conversion material is not used or the material used is almost unable to convert near-infrared light, the conversion efficiency is approximately equal to 0. At this time, the weight factor c can be set to 0, and the influence of the near-infrared band is not considered when calculating SAI; if the near-infrared electromagnetic wave conversion material used can completely and efficiently convert near-infrared light into red and blue light, the conversion efficiency is approximately equal to 1, and the contribution of the near-infrared band to SAI is maximized.

[0074] When calculating the spectral absorption index (SAI), the present invention specifically considers the contribution of the near-infrared band to the SAI. This innovative design significantly enhances the comprehensive utilization efficiency of plants' full-spectrum resources. Focusing solely on the ratio of red to blue wavelengths would overlook the potential value of the near-infrared band in the plant's environment. Although near-infrared light contributes only limitedly to direct plant photosynthesis, it has high energy density and a wide wavelength range. Near-infrared conversion materials can effectively convert this "unusable light" into the red and blue light required for plant photosynthesis, improving light energy utilization and the plant's spectral absorption capacity. Furthermore, by considering the impact of the near-infrared band on SAI, this evaluation parameter more comprehensively reflects the spectral utilization status of plants under real lighting environments, thereby accurately assessing plant growth performance. This invention can more effectively improve plant photosynthesis efficiency under complex lighting conditions (such as natural light or greenhouse environments), fundamentally optimizing plant growth potential. Furthermore, the rational utilization of the near-infrared band can reduce plants' need for excessive supplemental lighting, lowering energy consumption in agricultural production, and possessing significant ecological and economic benefits. This technical effect not only breaks through the limitations of traditional light utilization in theory, but also provides a solution with practical application significance for the development of precision agriculture.

[0075] Furthermore, the central control unit 300 can characterize the actual growth status of the plant based on the above-mentioned evaluation parameters. The growth status of the plant is mainly affected by the photosynthesis efficiency, the lighting environment, and the overall nutrient accumulation. The comprehensive calculation of the chlorophyll fluorescence signal and the spectral absorption index can almost cover the core indicators related to photosynthesis. Preferably, the central control unit 300 can use the above-mentioned evaluation parameters to calculate a comprehensive evaluation index based on the photosynthesis efficiency and spectral absorption capacity of the plant - the growth status parameter (GSP), the calculation formula of which is as follows:

[0076] GSP=w1·Φ+w2·SAI,

[0077] Among them, w1 and w2 are the weight factors of the corresponding parameters, which are used to adjust the contribution of different parameters to GSP and can be obtained through experimental calibration.

[0078] Preferably, GSP can dynamically assess the growth and health status of plants and directly reflect the photosynthesis efficiency and light energy utilization efficiency.

[0079] Preferably, the central control unit 300 can adjust the working parameters of the sprayer 100 (mainly the spraying pressure of the pressure regulating valve 140) based on the changing trend of GSP, so as to change the application amount of the suspension sprayed from the sprayer 100 by adjusting the spraying pressure of the pressure regulating valve 140.

[0080] Preferably, in order to ensure that the suspension can be sprayed at an appropriate flow rate and atomization degree, the central control unit 300 controls the pressure regulating valve 140 to achieve precise control of the spraying parameters. Specifically, during the initialization phase, the central control unit 300 can set a default pressure value and an ideal GSP target range for different crop types. During operation, the acquisition unit 200 obtains the latest plant growth status data, and the central control unit 300 calculates the current GSP. Subsequently, the central control unit 300 compares and analyzes the GSP monitored in real time with the preset target range: if the GSP is lower than the target minimum value (GSP target_min ), it indicates that the plant may need additional stimulation to improve its growth state; conversely, if the GSP exceeds the target maximum value (GSP target_max ), the application rate should be reduced, and manual intervention may even be necessary to reduce the amount of suspension adhering to the leaves to avoid over-irritation. Based on this judgment, the central control unit 300 can adopt an incremental adjustment strategy, that is, gradually adjusting the set value of the pressure regulating valve 140 in small steps of ΔP. For example, when the GSP is below the target range, the new set value can be calculated according to the following formula:

[0081]

[0082] Among them, Psetpoint is the set value of the pressure regulating valve 140, the left side of the equation is the new set value, the right side of the equation is the old set value, GSP target_min is the target minimum value, GSP is the GSP value monitored in real time, and ΔP is the preset step size.

[0083] Once the new P is determined setpoint , the central control unit 300 will send a command to the pressure regulating valve 140 in the sprayer 100 to make it work according to the new set pressure, thereby achieving precise control of the amount of suspension applied. In addition, the system will record the timestamp of each adjustment, the old P setpoint 、New P setpoint , real-time GSP and other relevant parameters, facilitating subsequent review and optimization. This closed-loop control solution not only ensures that plants are always in optimal growth conditions, but also forms a stable feedback loop through continuous monitoring, further enhancing the system's intelligence and application effectiveness.

[0084] Given that different crop species have varying needs and responses to near-infrared electromagnetic wave conversion materials, the central control unit 300 can customize its adjustment algorithms for specific crops to ensure system applicability and effectiveness. Plant needs change with the seasons and throughout the crop's growth cycle, necessitating regular updates to the GSP target range and corresponding adjustments to control parameters to maintain long-term stability and adaptability.

[0085] Preferably, if Figure 1 and Figure 3 As shown, the application system of the present invention may also include a mobile unit 400 for moving within the planting area. The configuration type of the mobile unit 400 may be determined based on the area of the planting area and actual conditions. For example, the mobile unit 400 may be configured as an unmanned vehicle, a slider sliding on rails mounted on the ceiling, or a drone. Preferably, the sprayer 100 and / or the data collection unit 200 may be mounted on the mobile unit 400 and moved with the mobile unit 400 within the planting area. Preferably, the central control unit 300 may be mounted on the mobile unit 400 and connected to the sprayer 100 and the data collection unit 200 via a short-range wired or wireless connection to reduce data transmission latency and improve data transmission stability. Alternatively, the central control unit 300 may be wirelessly connected to the sprayer 100 and the data collection unit 200 over medium and long distances, reducing the load on the mobile unit 400 and enabling the current plant growth status to be directly visualized on a display unit connected to the central control unit 300.

[0086] According to a preferred embodiment, for laboratories that use sunlight for rapid plant propagation research, the mobile unit 400 of the present invention can be configured as a sliding member that can slide on a slide rail, so that when the collection unit 200 is mounted on the mobile unit 400, it can obtain sampling information of each plant in the planting area, and transmit it to the central control unit 300 for calculation and processing to obtain the growth status of each plant. The collection unit 200 can move with the mobile unit 400, and when sampling any plant in the planting area, when the moving path of the mobile unit 400 is planned and determined, the plants in the planting area will be assigned corresponding sequence values, wherein the sampled plant can be set as the current plant, and the plant with a sequence value that is one unit ahead of the current plant in the specified sequence can be set as the previous sequence plant, and the plant with a sequence value that is one unit behind the current plant can be set as the next sequence plant. The sequence naming of the plant changes dynamically with the movement of the mobile unit 400. Preferably, the mobile unit 400 may also be equipped with a sprayer 100 capable of storing and discharging the suspension, wherein the outlet of the sprayer 100 is arranged to face the planting area, and the suspension can be sprayed onto the plants in the planting area in the form of mist droplets. Preferably, the sprayer 100 can adjust the spraying mode in response to a control signal from the central control unit 300, wherein the control signal is the application amount that is most conducive to the suspension adhering to the plant leaf surface and maximizing the plant photosynthesis rate after the central control unit 300 calculates the sampling information obtained by the collection unit 200 and analyzes the obtained plant growth status.

[0087] like Figure 4As shown, for plants planted in rows within a planting area, the mobile unit 400 can typically move in two directions: horizontal and vertical. The direction parallel to or opposite to the direction of arrangement of any row of plants can be defined as the horizontal direction, while the direction perpendicular to the horizontal direction within a plane is defined as the vertical direction. Furthermore, when moving horizontally, the mobile unit 400 can be positioned above the gap between two adjacent rows of plants, allowing the collection unit 200 located on one side of the mobile unit 400 to sample one row of plants while the sprayer 100 located on the other side of the mobile unit 400 can spray the suspension on the other row of plants. Furthermore, the mobile unit 400 can move horizontally from one gap to another in the vertical direction without turning, maintaining the placement of the collection unit 200 and sprayer 100 on the mobile unit 400. Preferably, when the mobile unit 400 moves laterally to the end of the current gap, the direction of movement (i.e., vertically) from the current gap to the adjacent gap is approximately parallel to the direction of the sprayer 100 pointing to the collection unit 200. This allows the sprayer 100 to spray the suspension on a row of plants sampled by the collection unit 200 when the mobile unit 400 moves laterally to the adjacent gap after the mobile unit 400 moves vertically and then moves laterally. Furthermore, with the starting position as the observation point, when the mobile unit 400 moves laterally, if it moves away from the starting position, the horizontal direction can be set to the positive horizontal direction; conversely, if it moves closer to the starting position, the horizontal direction can be set to the negative horizontal direction. Furthermore, when the mobile unit 400 moves longitudinally, if it moves away from the starting position, the horizontal direction can be set to the positive horizontal direction; conversely, if it moves closer to the starting position, the horizontal direction can be set to the negative vertical direction.

[0088] For example, there are three rows of plants (A, B, C) in the current planting area, wherein the starting position of the mobile unit 400 is located above the gap of the plants in row A relative to the other side away from the plants in row B. The mobile unit 400 moves once in the positive transverse direction in the current gap and samples the plants in row A through the collection unit 200. When the mobile unit 400 moves to the end of the current gap, it moves in the positive longitudinal direction to the adjacent gap between the plants in row A and the plants in row B, and moves in the reverse transverse direction in the adjacent gap. At this time, since the mobile unit 400 moves to the gap between the plants in row A and the plants in row B, the name of the gap is dynamically changed to the current gap, and the plants in row A are The names of the gaps relative to the other side away from the plants in row B and the gaps between the plants in row B and the plants in row C are dynamically changed to adjacent gaps; when the mobile unit 400 performs a second movement in the reverse transverse direction in the current gap between the plants in row A and the plants in row B, the sprayer 100 can perform the spraying operation controlled by the central control unit 300 on the plants in row A, and at the same time the collection unit 200 can sample the plants in row B; when the mobile unit 400 moves to the end of the current gap, it moves in the positive longitudinal direction to the adjacent gap between the plants in row B and the plants in row C, and moves in the positive transverse direction in the adjacent gap; the above rules are repeated until the mobile unit 400 moves to the end position.

[0089] By performing plant information collection and spraying operations in the above-mentioned working manner, the requirements for software and hardware configuration can be reduced due to the deliberately extended time interval between the acquisition of the current plant sampling data by the collection unit 200 and the sprayer 100 performing the spraying operation in response to the control signal of the central control unit 300, thereby reducing installation and operating costs. In addition, the working efficiency can be improved because the mobile unit 400 maintains almost continuous motion or intermittent motion with short pauses.

[0090] Preferably, the sampling period of the collection unit 200 is usually shorter than the spraying period of the sprayer 100, so that the central control unit 300 starts the sprayer 100 to perform the spraying operation only when it determines based on the sampling information of the collection unit 200 that the surface adhesion of leaves of at least some plants in the current planting area is lower than the set threshold.

[0091] Preferably, if Figure 4As shown, after the mobile unit 400 moves from the starting position to the end position along the first trajectory 410, it can return from the end position to the starting position along the second trajectory 420 after a certain interval, wherein the second trajectory 420 overlaps with the first trajectory 410 in terms of line but moves in the opposite direction to the first trajectory 410. This configuration is because when the sprayer 100 mounted on the mobile unit 400 performs a spraying operation while moving with the mobile unit 400, the suspension sprayed from the sprayer 100 has an inertial component that deviates along the direction of movement while falling in the opposite direction of the first direction. As a result, relative to the moving direction of the mobile unit 400, the plant (particularly its leaves) can have a front side and a back side, and the front side can receive relatively more suspension than the back side. Therefore, by returning the mobile unit 400 that has completed the movement along the first trajectory 410 to the starting position along the second trajectory 420, the front side and the back side of the plant are exchanged, so that the plants with a low amount of suspension attached to the surface of some leaves are re-sprayed based on the results of the secondary sampling to ensure the light energy utilization rate of the plant leaves. Preferably, for the first trajectory 410, the longitudinal movement of the mobile unit 400 usually only includes movement along the positive longitudinal direction; for the second trajectory 420, the longitudinal movement of the mobile unit 400 usually only includes movement along the reverse longitudinal direction. The reason for the certain time interval is that there is usually a certain lag time between the application of the suspension and the observation of significant growth changes (i.e., changes in GSP). The response of the plant during this time period may be gradual rather than immediate. Therefore, it is necessary to have a certain time interval (i.e., lag time t) after the mobile unit 400 reaches the end position along the first trajectory 410. 滞后 ) and then return to the starting position along the second trajectory 420 to ensure the effectiveness of data collection during the movement along the second trajectory 420.

[0092] Preferably, if Figure 5 As shown, the central control unit 300 can generate a graph of the GSP changes over time for each plant, which includes an expected curve and an actual curve. The central control unit 300 can analyze the spraying operation based on the comparison of the two curves. Figure 5 As shown, the spraying node of the current cycle is taken as time zero, and from time zero to t 滞后 The area of the graph formed by the two curves in the period between t and t can be used as a quantitative indicator to measure the deviation between the actual growth state and the expected growth state. The larger the area, the greater the difference between the actual GSP value and the expected GSP value, indicating that the promotion effect of the infrared electromagnetic wave conversion material on plant growth has deviated from the expected target. The central control unit 300 can determine whether further intervention measures are needed based on the area of the above graph. For example, when its area exceeds a preset threshold, a detection signal of the sprayer 100 and / or the plant growth environment can be generated, and at time t滞后 At the corresponding time node, the real-time GSP also failed to reach the target minimum value (GSP target_min ), the suspension can be sprayed at the same time to make the actual GSP value reach the expected target as soon as possible. Preferably, when the suspension is sprayed for individual plants, the central control unit 300 is based on the pursuit of the actual curve at t 周期 The spraying pressure during the supplementary spraying is determined based on the goal of roughly intersecting the corresponding time node with the expected curve, so as to ensure that the plants to be supplemented can still have roughly the same spraying cycle as other plants. 周期 The control target of the central control unit 300 is to make the actual curve intersect with the expected curve at the corresponding time node, but in practice it is usually not so accurate. Therefore, at t 周期 The GSP deviation value corresponding to the two curves at the corresponding time node can be used as the personalized characteristic value of the plant, so that the central control unit 300 can perform targeted calculations on the personalized characteristic values of different plants in subsequent analysis. Preferably, if a large number of plants need to be sprayed with the suspension, the central control unit 300 can re-determine the spraying cycle (t 周期 ) so that the new spraying cycle is more suitable for this batch of plants.

[0093] Example 2

[0094] This embodiment is a further improvement of embodiment 1, and repeated contents will not be repeated here.

[0095] The present invention discloses an application method of a near-infrared electromagnetic wave conversion material for rapid crop propagation, which can be implemented using the application system described in Example 1.

[0096] Preferably, if Figure 6 As shown, the application method of the present invention may include the following steps:

[0097] The near-infrared electromagnetic wave conversion material is configured as a suspension and stored in the sprayer 100;

[0098] Acquire data information related to plant growth status, analyze the plant growth status in the planting area, and use this to determine the operating parameters of the sprayer 100;

[0099] The suspension of the near-infrared electromagnetic wave conversion material is sprayed onto the plants in the planting area and adheres to the surface of the leaves of each plant.

[0100] It should be noted that the above-mentioned specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also belong to the disclosure scope of the present invention and fall within the protection scope of the present invention. Those skilled in the art should understand that the present invention specification and its drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of the present invention is defined by the claims and their equivalents. The present invention specification contains multiple inventive concepts, such as "preferably" or "according to a preferred embodiment", which means that the corresponding paragraph discloses an independent concept, and the applicant reserves the right to file a divisional application based on each inventive concept. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. An application system for rapid crop propagation of near-infrared electromagnetic wave conversion materials, characterized in that: It includes: A sprayer (100) for containing and spraying a near-infrared electromagnetic wave conversion material; A collection unit (200) is used to obtain data information related to the growth status of plants; The central control unit (300) is used to analyze the growth status of plants in the planting area based on the data information obtained by the collection unit (200), and thereby determine the working parameters of the sprayer (100). The near-infrared electromagnetic wave conversion material is stored in the sprayer (100) in a manner configured as a suspension, so that the sprayer (100) can spray the suspension of the near-infrared electromagnetic wave conversion material onto the plants in the planting area and adhere to the leaf surfaces of each plant in response to a control signal generated by the central control unit (300) after performing calculations based on the data information acquired by the acquisition unit (200).

2. The application system according to claim 1, characterized in that: The sprayer (100) comprises a liquid storage tank (110) for storing a suspension to be sprayed, a conveying component (120) for conveying the suspension from the liquid storage tank (110) to a nozzle (130), and a nozzle (130) for spraying the suspension, wherein the sprayer (100) is provided with a pressure regulating valve (140) for controlling the spraying pressure, and the pressure regulating valve (140) is communicatively connected to the central control unit (300) to receive a control signal sent by the central control unit (300).

3. The application system according to claim 1 or 2, characterized in that: The collection unit (200) comprises a first collection part (210) for measuring chlorophyll fluorescence of plants in a planting area, a second collection part (220) for acquiring a vegetation reflectance spectrum in the planting area, and a third collection part (230) for acquiring light intensity and spectral distribution around the plants in the planting area, so as to respectively acquire maximum photochemical efficiency, normalized vegetation index, and photosynthetic photon flux density in multiple bands.

4. The application system according to any one of claims 1 to 3, characterized in that: The central control unit (300) can calculate the following evaluation parameters based on various types of data information obtained by the acquisition unit (200): chlorophyll fluorescence signal, which is used to characterize the photosynthetic activity and photosynthetic efficiency of the plant; spectral absorption index, which is used to evaluate the spectral resource utilization efficiency of the current plant, wherein the maximum photochemical efficiency can be used to calculate the chlorophyll fluorescence signal, and the normalized vegetation index and photosynthetic photon flux density of multiple bands can be used to calculate the spectral absorption index.

5. The application system according to any one of claims 1 to 4, characterized in that: The central control unit (300) can integrate the chlorophyll fluorescence signal and the spectral absorption index to calculate the growth status parameter as a comprehensive evaluation index to dynamically evaluate the growth health status of the plant, thereby directly reflecting the photosynthesis efficiency and light energy utilization efficiency.

6. The application system according to any one of claims 1 to 5, characterized in that: The central control unit (300) is capable of dynamically adjusting the operating parameters of the sprayer (100) according to the deviation between the target value and the current value of the growth state parameter, wherein the operating parameters of the sprayer (100) include the spraying pressure of the pressure regulating valve (140), so as to change the application amount of the suspension sprayed from the sprayer (100) by adjusting the spraying pressure of the pressure regulating valve (140).

7. The application system according to any one of claims 1 to 6, characterized in that: The application system further comprises a mobile unit (400) for moving within the planting area. The sprayer (100) and the collection unit (200) can be mounted on the mobile unit (400) and can move within the planting area along with the mobile unit (400).

8. The application system according to any one of claims 1 to 7, characterized in that: The moving unit (400) is configured as a sliding member capable of sliding on a slide rail, and is capable of moving from a starting position to an end position along a first track (410), and then returning from the end position to the starting position along a second track (420) after a delay time, wherein the second track (420) overlaps with the first track (410) in line, but has a direction opposite to that of the first track (410).

9. The application system according to any one of claims 1 to 8, characterized in that: The central control unit (300) can generate a graph showing the change of the corresponding growth state parameter over time for each plant, wherein the graph includes an expected curve and an actual curve, wherein the central control unit (300) can analyze the spraying operation based on the comparison of the two curves.

10. A method for applying near-infrared electromagnetic wave conversion materials for rapid crop propagation, characterized in that: It includes the following steps: The near-infrared electromagnetic wave conversion material is configured as a suspension and stored in a sprayer (100); Acquiring data information related to plant growth status, analyzing the plant growth status in the planting area, and determining the operating parameters of the sprayer (100) based on the data; The suspension of the near-infrared electromagnetic wave conversion material is sprayed onto the plants in the planting area and adheres to the surface of the leaves of each plant.

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