Agricultural environment regulation method and system based on plant leaf temperature difference

Abstract

The application discloses an agricultural environment regulation method and system based on plant leaf temperature difference, and belongs to the field of facility agricultural intelligent regulation. The application arranges at least two types of plant monitoring units with different transpiration response characteristics in a target planting area, which are CAM metabolism plants and non-CAM metabolism plants respectively; non-contact temperature measurement is adopted to synchronously obtain the functional leaf temperatures of the two types of plants, the leaf temperature difference is calculated after pretreatment, and the leaf temperature difference is used as a comprehensive physiological response index reflecting the transpiration state and the stomatal opening degree of target crops; the leaf temperature difference is compared with preset double thresholds, CO2 is applied according to the result, and irrigation, ventilation, shading, light supplement and other behaviors can be linked as needed. The application comprehensively reflects the results of the action of multiple environmental factors by using a single temperature difference variable, does not need complex models and multiple sensors, realizes the technical paradigm change from environment perception-model inference to physiological response-direct regulation, and is suitable for greenhouses, plant factories, three-dimensional agriculture and open field agriculture.

Description

Technical Field

[0001] This invention relates to the field of intelligent environmental control in facility agriculture, and in particular to an agricultural environmental control method and system based on temperature differences in plant leaves. Background Technology

[0002] Carbon dioxide fertilizer is a core technology to improve the photosynthetic efficiency and yield of facility crops. The existing control methods are divided into three categories: (1) Timed control type: CO2 is applied at fixed time intervals, which is out of sync with the physiological state of crops; (2) Environmental parameter trigger type: It relies on sensors for light, temperature, humidity and CO2 concentration, and is easily affected by environmental fluctuations; (3) Model prediction type: It requires the construction of complex crop models, with large parameter uncertainties and high maintenance costs.

[0003] The existing technology has the following core defects: The regulation is based on environmental parameters rather than the actual physiological state of the crop, making it impossible to accurately determine the stomatal opening / carbon absorption stage. Although single crop leaf temperature monitoring is related to transpiration, it is easily affected by environmental interference such as sudden changes in light, ventilation, and humidity. It cannot distinguish between environmental fluctuations and physiological responses. Therefore, in existing technologies, it is only used as a monitoring indicator and has never been used as a stable and reliable control signal. It requires the deployment of a large number of environmental sensors, making the system complex, costly, and difficult to maintain. It is difficult to achieve compatibility in mixed cropping or crop systems with different diurnal carbon metabolism patterns.

[0004] Furthermore, stomatal conductance directly determines transpiration intensity and CO2 absorption efficiency, and transpiration intensity directly affects leaf temperature. CAM plants (Crassulacean Acid Metabolism plants) and non-CAM plants exhibit completely opposite stomatal opening phases between day and night: CAM plants open their stomata at night to absorb CO2 and close them during the day to reduce transpiration; non-CAM plants open their stomata during the day and close them at night. Therefore, the leaf temperature change trends of the two types of plants show an opposite pattern.

[0005] Currently, no technical solution exists that introduces plants with different transpiration response characteristics as biological control units, utilizes the temperature difference between leaves of plants to directly reflect the transpiration and stomatal status of the target crop, and further drives agricultural environmental regulation behavior. Therefore, it is necessary to propose a new technical solution to obtain the comprehensive physiological response of crops to environmental conditions in a more direct, low-cost, and stable manner, and to carry out precise regulation based on this. Summary of the Invention

[0006] The purpose of this invention is to provide an agricultural environment control method and system based on plant leaf temperature difference to solve the problems in the background art.

[0007] To achieve the above objectives, this invention provides an agricultural environment control method based on plant leaf temperature difference, comprising the following steps: Step 1: Set up at least two types of plant monitoring units in the target planting area. The two types of plants are CAM metabolites and non-CAM metabolites with different transpiration response characteristics, and are in the same air environment. Step 2: Using a non-contact temperature measurement method, the temperature of mature and healthy functional leaves or mature functional leaves in the middle of the plant canopy of the two types of plants is measured simultaneously to obtain the leaf temperature data of CAM metabolic plants and non-CAM metabolic plants. Step 3: After preprocessing the leaf temperature data of the two types of plants, calculate the real-time leaf temperature difference. Real-time blade temperature difference As a comprehensive physiological response indicator reflecting the transpiration state and stomatal opening degree of the target crop; Step 4, The system compares data with a preset threshold, automatically triggering or adjusting at least one agricultural environmental control behavior based on the comparison result, and forming a data-driven mechanism during the control process. Closed-loop feedback control.

[0008] Preferably, in step 1, the transpiration rate of CAM metabolizing plants changes less during the target regulation period than that of non-CAM metabolizing plants; the spatial distance between the monitoring units of the two types of plants is no more than 1 meter.

[0009] Preferably, in step 2, the non-contact temperature measurement method is infrared temperature measurement or infrared thermal imaging.

[0010] Preferably, in step 3, the preprocessing includes moving average filtering, outlier removal, and differential correction with ambient air temperature; the leaf temperature is a single-point functional leaf temperature, a multi-point average value, or a characteristic temperature of the canopy region.

[0011] Preferably, during the differential correction process, the corrected ambient air temperature Represented as: ; in, The temperature after outlier detection. This method allows for the simultaneous acquisition of ambient air temperature at the same time and location. The correction method can simultaneously eliminate the combined interference from ventilation, lighting, and ambient temperature. It only reflects the physiological differences in stomatal opening and closing and transpiration intensity, thus improving control stability and anti-interference ability.

[0012] Preferably, in step 3, the real-time blade temperature difference The calculation formula is: ; in, Temperature data for non-CAM metabolic plants after preprocessing. Temperature data for CAM metabolic plants after preprocessing.

[0013] Preferably, in step 4, the agricultural environmental regulation behavior includes CO2 application control.

[0014] Preferred, according to The comparison result with a preset threshold determines the current carbon uptake and metabolism stage of the plant system, and automatically selects a matching CO2 application control mode based on this stage; the preset threshold is either a fixed threshold or a threshold adaptively updated based on historical growth data, including a first threshold. Second threshold ,and .

[0015] Preferably, the method for selecting the CO2 application control mode is as follows: when When non-CAM plants are identified as being in a highly efficient carbon uptake stage, the first CO2 application mode is activated, with a target volume concentration of 600-1200 ppm. when When the CAM plant is in the nighttime carbon uptake stage, the second CO2 application mode is activated, with a target volume concentration of 300-800 ppm. when At that time, the application of carbon dioxide should be suspended or the atmospheric background concentration should be maintained.

[0016] Preferably, agricultural environmental regulation behaviors also include at least one of irrigation control, ventilation control, supplemental lighting control, or shading control; wherein, irrigation control is based on The continuous offset decision, ventilation control and shading control are based on Rate of change decision, supplementary lighting control based on A comprehensive judgment and decision based on ambient lighting.

[0017] This invention also provides an agricultural environment control system based on plant leaf temperature difference, used to implement the above-mentioned control method, comprising: At least two types of plant monitoring units are deployed in the target planting area, with the two types of plants having different transpiration response characteristics and being in the same air environment; A non-contact temperature measurement module is used to simultaneously collect the functional leaf temperature of two types of plant monitoring units, and can be an infrared thermometer or an infrared thermal imager. The temperature difference calculation and control module is electrically connected to the non-contact temperature measurement module. This module is used for preprocessing and calculating temperature data. and will A control command is generated after comparing the value with a preset threshold. At least one agricultural environmental regulation execution unit is connected to the temperature difference calculation and control module for receiving regulation commands and executing corresponding agricultural environmental regulation behaviors; The system is based on This forms a closed-loop feedback control.

[0018] Preferably, the temperature difference calculation and control module has a built-in first threshold. Second threshold ,and And configured as follows: when At that time, an instruction to initiate the first CO2 application mode is generated; when At that time, an instruction to initiate the second CO2 application mode is generated; when At that time, an instruction is generated to suspend the application of carbon dioxide or maintain the background concentration.

[0019] Preferably, the temperature difference calculation and control module also has built-in preset duration, rate threshold, and preset illumination threshold, and is configured as follows: when Continue to exceed When the preset duration is reached, a command to start irrigation is generated; when Below At that time, a command to pause irrigation is generated; when When the rate of ascent per unit time exceeds a rate threshold, an instruction is generated to increase ventilation and / or activate the shading; when When the rate of descent exceeds a rate threshold per unit time, an instruction is generated to reduce ventilation and / or close the shading. when If the ambient light intensity is lower than the preset light threshold, a command to turn on the supplementary light is generated; otherwise, a command to turn off the supplementary light is generated.

[0020] The technical principle of this invention is as follows: Under the same environmental conditions, plants with different transpiration characteristics exhibit significant differences in leaf temperature response. Using low transpiration fluctuation plants (such as CAM plants) as a biological reference and the target crop (non-CAM plants) as the detection object, the leaf temperature difference is defined as... By setting dual thresholds, the carbon absorption and metabolism stage of crops (non-CAM high-efficiency carbon absorption stage or CAM nighttime carbon absorption stage) can be directly identified, thereby accurately applying CO2 or linking other environmental controls to achieve model-free and sensor-free closed-loop feedback control.

[0021] Therefore, the agricultural environment control method and system based on plant leaf temperature difference of the present invention has the following beneficial effects: (1) The leaf temperature difference accurately reflects the stomatal opening state without indirect inference error, avoiding the disconnect between environmental parameters and crop needs; through the temperature difference between the two types of plants, the common environmental influences such as sudden changes in light and temperature fluctuations are effectively offset, and a pure physiological response signal is obtained.

[0022] (2) The system protected by this invention does not require the installation of sensors for temperature, humidity, light, CO2 concentration, etc. It only requires an infrared temperature measuring device and a controller, thus reducing the system cost.

[0023] (3) When greenhouse light, humidity, or ventilation conditions change, existing control methods are prone to over- or under-regulation, while the present invention can... The system automatically adjusts and regulates its state to maintain crops in a better carbon absorption phase.

[0024] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0025] Figure 1 This is a flowchart of an agricultural environment control method based on plant leaf temperature difference according to the present invention; Figure 2 The curves showing the diurnal temperature difference between CAM and non-CAM plant leaves in Example 1 of this invention are shown. Figure 3 This is a comparison chart of carbon dioxide consumption between Example 2 and Comparative Examples 2-4 of the present invention. Detailed Implementation

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0028] Please see Figure 1 This invention provides a method for regulating the agricultural environment based on temperature differences between plant leaves, comprising the following steps: Step 1: Deploy plant monitoring units: At least two types of plant monitoring units should be set up within the target planting area. The first type of plants are CAM (Campylon ammodendron) metabolizing plants (such as sedum, agave, and cactus), whose transpiration rate changes less significantly during the target control period than the second type of plants. The second type of plants are non-CAM metabolizing plants (i.e., the target crop or its representative plants, such as tomatoes, lettuce, and wheat). Both types of plants should be placed in the same air environment unit, with a spatial distance of no more than 1 meter to ensure consistent microenvironmental conditions. The first type of plants can be arranged in pots.

[0029] Step 2, Synchronous Temperature Measurement: A non-contact temperature measurement method (infrared thermometer or infrared thermal imager) is used to simultaneously measure the temperature of mature, healthy functional leaves or mature functional leaves in the middle of the plant canopy of two types of plants, obtaining leaf temperature data for CAM-metabolizing plants and non-CAM-metabolizing plants. During measurement, a fixed height and angle are maintained, and mature functional leaves are selected (avoiding old and young leaves). The sampling interval can be set as needed (e.g., 1-5 minutes).

[0030] Step 3: Data preprocessing and temperature difference calculation: Preprocessing was performed on the raw temperature sequences of leaves from CAM-metabolizing plants and non-CAM-metabolizing plants, including: Moving average filtering: Takes the average of the most recent N sampling points (e.g., 5) to suppress instantaneous noise; Outlier removal: Data exceeding 3 times the standard deviation were removed and replaced with linear interpolation.

[0031] Differential correction for ambient air temperature.

[0032] Corrected ambient air temperature Represented as: ; in, The temperature after outlier detection. This method involves synchronously collecting ambient air temperature data at the same time and location; it eliminates the interference of ambient temperature fluctuations on blade temperature, enabling subsequent... A purer reflection of physiological state.

[0033] After preprocessing the data using the aforementioned method, the real-time blade temperature difference is calculated. ; in, Temperature data for non-CAM metabolic plants after preprocessing. Temperature data for CAM metabolic plants after preprocessing.

[0034] Should Leaf temperature serves as a comprehensive physiological response indicator reflecting the transpiration status and stomatal opening degree of a target crop. It can be the temperature of a single functional leaf, the average value from multiple points, or the characteristic temperature of the canopy region.

[0035] Step 4: Threshold comparison and closed-loop feedback control: Will Compare with a preset threshold. The preset threshold can be a fixed threshold or an adaptively updated threshold based on historical growth data. Set the first threshold. Second threshold ,and According to physiological principles: during the day, non-CAM plants have open stomata, strong transpiration, and low leaf temperature, while CAM plants have closed stomata and high leaf temperature. The value is positive; at night, CAM plants have open stomata and low leaf temperature, while non-CAM plants have closed stomata and high leaf temperature. It is a negative value.

[0036] Therefore: when When non-CAM plants are in a highly efficient carbon uptake phase (daytime), the first CO2 application mode is activated, with a target volume concentration of 600~1200 ppm. when When it is determined that CAM plants are in the nocturnal carbon uptake stage (non-CAM plants have closed stomata), the second CO2 application mode is activated, with a target volume concentration of 300~800ppm, or only the atmospheric background concentration is maintained; when When necessary, the application of carbon dioxide should be suspended or the atmospheric background concentration (approximately 400 ppm) should be maintained.

[0037] The aforementioned regulatory behaviors are not limited to CO2 control, but may also include at least one of irrigation control, ventilation control, supplemental lighting control, and shading control. The logic of multi-parameter coordinated regulation is as follows: Irrigation control, ventilation control, supplemental lighting control, or shading control are also based on Decision-making is carried out to form a unified temperature difference-driven regulation system; irrigation control is based on... The continuous offset decision, ventilation control and shading control are based on Rate of change decision, supplementary lighting control based on A comprehensive judgment and decision based on ambient lighting.

[0038] In the following examples, the preset duration was 30 minutes, the rate threshold was 0.5℃ / 15min, and the preset light threshold was 200μmol·m. -2 ·s -1 The specific control logic is as follows: 1) Irrigation control: When For more than 30 minutes When the crop is deemed to be under water stress, irrigation is triggered; when Below Reduce or suspend irrigation at this time; 2) Ventilation control: When Increase ventilation if the temperature rises by more than 0.5°C within 15 minutes; when If the temperature drops by more than 0.5°C within 15 minutes, reduce the ventilation rate. 3) Fill light control: When Below And the ambient light intensity is lower than the preset light threshold of 200 μmol·m -2 ·s -1 If the crop's stomata are not opening sufficiently due to insufficient light, turn on supplemental lighting; otherwise, turn off supplemental lighting. 4) Shading control: When Turn on the shade net when the temperature rises by more than 0.5°C within 15 minutes; when If the temperature drops by more than 0.5°C within 15 minutes, close the shade net. The above parameters (duration, rate of change threshold, etc.) can be adjusted according to crop type and growth stage.

[0039] Continuous measurement throughout the entire regulation process This forms a closed-loop feedback control.

[0040] Example 1 This embodiment takes the comprehensive regulation of greenhouse tomatoes as an example, and uses the above methods to carry out four agricultural environmental regulation measures: CO2 application, irrigation, ventilation and shading control.

[0041] In a greenhouse, the target crop is tomato (a non-CAM plant). Sedum (a CAM plant) was selected as the first type of plant and planted in pots between the tomato rows, with a spacing of 0.5 meters between the two types of plants.

[0042] Infrared temperature sensors (model MLX90614) were used, positioned at a fixed height of 30 cm, to measure the temperature of functional leaves of Sedum and tomato plants, collecting data synchronously every 5 minutes. The raw data were then filtered using a 5-point moving average, outlier removal, and differential correction for ambient air temperature before calculation. = .

[0043] Preliminary experiments determined that when tomato stomata are fully open (high light, suitable temperature and humidity), the tomato leaf temperature is lower than that of sedum. Approximately -1.5 to -0.8℃; at night or under stress conditions, the leaf temperature of tomato is higher than that of sedum. Approximately +0.5 to +1.5℃. For example... Figure 2 As shown, a first threshold is set. =-1.0℃, second threshold =+1.2℃ (satisfied) ).

[0044] The specific regulatory logic is as follows: 1) CO2 application: When When the temperature is ≤-1.0℃, the tomatoes are determined to be in the high-efficiency carbon absorption stage. The CO2 cylinder solenoid valve is activated to raise the CO2 concentration in the greenhouse to 1000ppm. when When the temperature is ≥+1.2℃, stop applying CO2. When -1.0℃ < At temperatures below +1.2℃, maintain the atmospheric background concentration.

[0045] 2) Irrigation control: When If the temperature remains above +1.2℃ for more than 30 minutes, the crop is considered to be under water stress, triggering the drip irrigation system to replenish water for 10 minutes; when Irrigation should be suspended when the temperature drops below -1.0℃; irrigation should be carried out according to the regular schedule during other periods.

[0046] 3) Ventilation and sunshade: When If the temperature rises by more than 0.5°C within 15 minutes (e.g., from +0.5°C to above +1.0°C), the shade netting will automatically open and ventilation will increase; when If the temperature drops by more than 0.5°C within 15 minutes (e.g., from -0.5°C to below -1.0°C), reduce ventilation and close the shade net; maintain the current state if the rate of change is below the threshold.

[0047] Comparative Example 1 This comparative example uses adjacent greenhouses during the same period as an example, employing timed CO2 application (9:00-15:00 daily, concentration 800ppm), timed irrigation (twice daily, 15 minutes each time), and fixed ventilation and shading methods.

[0048] After 30 days of continuous operation, Example 1 was compared with Comparative Example 2. Using traditional timed CO2 application as a 100% baseline and with similar tomato biomass (yield difference per plant <5%), Example 1, based on precise control using leaf temperature differences, achieved only 58% CO2 consumption. This is significantly lower than timed application, light threshold control, and closed-loop concentration control, saving 42% of CO2 fertilizer usage. This indicates that the present invention, by determining the application time based on leaf temperature differences, ensures that more CO2 is actually absorbed by the crop, rather than being wasted during ventilation or inefficient metabolic stages.

[0049] Example 2 This embodiment uses CO2 regulation of lettuce in a plant factory as an example to demonstrate the above-mentioned method for agricultural environmental regulation.

[0050] In a closed plant factory, the target crop was lettuce (a non-CAM plant). Agave (a CAM plant) was selected as the first type of plant, and both were housed in the same air environment unit. The canopy and leaf temperatures of both plant types were simultaneously acquired using an infrared thermal imager (FLIRA35). The average temperature was extracted after image processing and then calculated. = .set up =-1.0℃, =+1.2℃.

[0051] Its regulatory logic is as follows: when At ≤-1.0℃, initiate CO2 application with a target concentration of 800ppm; when At ≥+1.2℃, no CO2 is applied, and only the background concentration is maintained at 300ppm; When -1.0℃ < When the temperature is less than +1.2℃, the application of CO2 should be suspended.

[0052] Comparative Example 2 This comparative example uses a timed application method, with lettuce (non-CAM plant) in a closed plant factory, the same as in Example 2, as the target crop, and the CO2 application device is turned on at preset time intervals.

[0053] Comparative Example 3 This comparative example uses the light threshold control method, taking lettuce (non-CAM plant) in a closed plant factory, the same as in Example 2, as the target crop, and applying CO2 when the light intensity reaches the set threshold.

[0054] Comparative Example 4 This comparative example uses a closed-loop CO2 concentration control method, taking lettuce (non-CAM plant) in a closed plant factory, the same as in Example 2, as the target crop, and maintaining the greenhouse gas concentration within a fixed range through a CO2 sensor.

[0055] By comparing Example 2 with Comparative Examples 2-4, and running continuously for 30 days, as... Figure 3 As shown, with the traditional timed CO2 application in Comparative Example 2 as 100% baseline, the total CO2 consumption in Example 2 was 58%, in Comparative Example 3 it was 92%, and in Comparative Example 4 it was 85%. This indicates that, within the same cultivation period, the lettuce crop obtained by the method in Example 2 exhibited a stable growth trend with no significant abnormal fluctuations and the lowest total CO2 consumption. This demonstrates that the method protected by this invention does not rely on a single environmental factor but rather uses the plant's comprehensive physiological response as a feedback signal, thus exhibiting better adaptability.

[0056] Therefore, the present invention provides an agricultural environment regulation method and system based on plant leaf temperature difference, which can achieve precise closed-loop regulation with real plant physiological signals as the core, significantly improve resource utilization efficiency and environmental adaptability, realize the technological paradigm shift from environmental perception-model inference to physiological response-direct regulation, and is applicable to greenhouses, plant factories, vertical agriculture and open field agriculture.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for regulating the agricultural environment based on temperature differences between plant leaves, characterized in that, Includes the following steps: Step 1: Set up at least two types of plant monitoring units in the target planting area. The two types of plants are CAM metabolites and non-CAM metabolites with different transpiration response characteristics, and are in the same air environment. Step 2: Using a non-contact temperature measurement method, the temperature of mature and healthy functional leaves or mature functional leaves in the middle of the plant canopy of the two types of plants is measured simultaneously to obtain the leaf temperature data of CAM metabolic plants and non-CAM metabolic plants. Step 3: After preprocessing the leaf temperature data of the two types of plants, calculate the real-time leaf temperature difference. ,Will As a comprehensive physiological response indicator reflecting the transpiration state and stomatal opening degree of the target crop, real-time leaf temperature difference The calculation formula is: ； in, Temperature data for non-CAM metabolic plants after preprocessing. Temperature data for CAM metabolic plants after preprocessing; Step 4, The system compares data with a preset threshold, automatically triggering or adjusting at least one agricultural environmental control behavior based on the comparison result, and forming a data-driven mechanism during the control process. Closed-loop feedback control.

2. The agricultural environment control method based on plant leaf temperature difference according to claim 1, characterized in that: In step 2, the non-contact temperature measurement method is infrared temperature measurement or infrared thermal imaging.

3. The agricultural environment control method based on plant leaf temperature difference according to claim 2, characterized in that: In step 3, the preprocessing includes moving average filtering, outlier removal, and differential correction with ambient air temperature; the leaf temperature is the single-point functional leaf temperature, the average value of multiple points, or the characteristic temperature of the canopy region.

4. The agricultural environment control method based on plant leaf temperature difference according to claim 3, characterized in that: In step 4, agricultural environmental regulation activities include CO2 control.

5. The agricultural environment control method based on plant leaf temperature difference according to claim 4, characterized in that: according to The comparison results with the preset threshold determine the current carbon absorption and metabolism stage of the plant system, and automatically select the matching CO2 application control mode based on the carbon absorption and metabolism stage. The preset threshold is either a fixed threshold or a threshold that is adaptively updated based on historical growth data, including a first threshold. Second threshold ,and .

6. The agricultural environment control method based on plant leaf temperature difference according to claim 5, characterized in that, The method for selecting the CO2 application control mode is as follows: when When non-CAM plants are identified as being in a highly efficient carbon uptake stage, the first CO2 application mode is activated, with a target volume concentration of 600-1200 ppm. when When the CAM plant is in the nighttime carbon uptake stage, the second CO2 application mode is activated, with a target volume concentration of 300-800 ppm. when At that time, the application of carbon dioxide should be suspended or the atmospheric background concentration should be maintained.

7. The agricultural environment control method based on plant leaf temperature difference according to claim 6, characterized in that: Agricultural environmental regulation behaviors also include at least one of irrigation control, ventilation control, supplemental lighting control, or shading control; among which, irrigation control is based on The continuous offset decision, ventilation control and shading control are based on Rate of change decision, supplementary lighting control based on A comprehensive judgment and decision based on ambient lighting.

8. An agricultural environment control system based on plant leaf temperature difference, used to implement the method according to any one of claims 1-7, characterized in that, include: At least two types of plant monitoring units are deployed in the target planting area, with the two types of plants in the same air environment unit; A non-contact temperature measurement module is used to simultaneously collect the functional leaf temperature of two types of plant monitoring units; The temperature difference calculation and control module is electrically connected to the non-contact temperature measurement module. This module is used for preprocessing and calculating temperature data. and will A control command is generated after comparing the value with a preset threshold. At least one agricultural environmental regulation execution unit is connected to the temperature difference calculation and control module for receiving regulation commands and executing corresponding agricultural environmental regulation behaviors.

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