A plug-in mechanism for a prairie ecosystem carbon sink automatic determination box, a box body, a system and a determination method thereof

Abstract

The application provides a plug-in mechanism for a prairie ecosystem carbon sink automatic determination box, a box body, a system and a determination method thereof, and belongs to the technical field of detection devices. The problems of low test frequency and manual operation in the prior art are solved, and continuous automatic observation of NEE and ER is realized. High-frequency continuous carbon flux information is provided for process-based ecosystem carbon cycle research.

Description

Technical Field

[0001] This application relates to the field of automatic carbon sequestration measurement technology, and more specifically, to a plug-in mechanism, box body, system and measurement method for an automatic carbon sequestration measurement box for grassland ecosystems. Background Technology

[0002] Carbon flux is the core of ecosystem material cycling and the foundation for quantitatively describing the material cycling and energy exchange processes between soil, vegetation, and the atmosphere. The carbon cycle is a complex process encompassing plant photosynthesis, ecosystem respiration, and other non-CO2 ecosystem carbon fluxes. In practical measurement and research, a combination of static open-box and dark-box measurements, combined with an infrared gas analyzer, is often used to measure net ecosystem carbon exchange (NEE) and ecosystem respiration, respectively. The difference between ER and NEE is then used to estimate total primary productivity (TPP). Due to its simple principle and ease of operation, the static box method has become a commonly used observational tool for studying NEE and ecosystem respiration, especially in controlled experiments for small-scale carbon cycle observations.

[0003] Traditional static chamber methods are mostly manual, and measuring NEE and ER requires separate transparent chambers and dark chambers with opaque cloth covering them, making them time-consuming and labor-intensive, and difficult to effectively conduct long-term automated continuous observations of NEE and ER processes. Furthermore, while carbon flux measurement methods based on eddy covariance technology can achieve automated continuous NEE measurement, they cannot effectively separate ER and calculate GPPGPP. Additionally, due to the complexity of eddy covariance technology and the measurement environment, this method faces many challenges in practical applications. Summary of the Invention

[0004] To overcome the above shortcomings, this application provides a plug-in mechanism, box, system and measurement method for an automatic carbon sink measurement box for grassland ecosystems. It aims to improve upon existing methods and solve the problems of relying on manual operation and low testing frequency. It realizes continuous automatic observation of NEE and ER, and provides high-frequency and continuous carbon flux information for conducting process-based research on ecosystem carbon cycling.

[0005] One of the technical solutions proposed in this invention is: a plug-in mechanism for an automatic carbon sequestration measurement box for grassland ecosystems, comprising a metal crossbar and a connecting mechanism.

[0006] This connecting mechanism is located at the connection between the metal crossbar and the measuring box body, and is used for the electrical connection of the measuring box body and the replacement of the measuring box body;

[0007] The connecting mechanism includes a rotating insertion structure and a locking structure. The locking structure is located on the surface of the metal crossbar. The rotating insertion structure is used to insert the metal crossbar into the mounting seat on the upper surface of the measuring box. The locking structure is used to lock the metal crossbar in the mounting seat on the upper surface of the measuring box.

[0008] Furthermore, the rotary plug-in structure includes a rear seat shaft, a plug-in shaft is installed at the center of the front end face of the rear seat shaft, a sealing groove is provided on the outer side of the front end face of the rear seat shaft, and telescopic grooves are provided in a circumferential array on the side of the plug-in shaft.

[0009] Furthermore, the rear seat shaft is a cylindrical structure, the plug-in shaft is a hollow cylindrical structure, the diameter of the plug-in shaft is smaller than the diameter of the rear seat shaft, the sealing groove is a circular ring structure, the telescopic groove is a cuboid structure, and the telescopic groove passes through the plug-in shaft.

[0010] Furthermore, the locking structure includes a telescopic block, with limit plates fixedly connected to the left and right sides of the telescopic block. A spring is installed on the lower end face of the limit plates, and a snap-fit ​​block is installed on the lower end face of the telescopic block. Limit grooves are opened on the left and right sides of the telescopic groove. A ring is installed inside the plug shaft, and a cuboid groove is opened on the inner side of the plug shaft. A connecting pipe is fixedly connected to the rear end face of the ring, and a notch is fixedly connected to the rear end face of the connecting pipe. Snap-fit ​​grooves are opened in a circumferential array on the side of the notch, and a spring is installed on the rear end face of the notch.

[0011] Furthermore, the telescopic block is a cuboid structure, and the telescopic block slides in conjunction with the telescopic groove. The limiting plate is a cuboid structure, the limiting groove is a cuboid structure, and the limiting plate slides in conjunction with the limiting groove. The snap-fit ​​block is an irregular column, and the ring slides in conjunction with the inner side of the insertion shaft. Cuboid blocks are installed in a circular array on the outer circumference of the ring. The cuboid groove is a cuboid structure, and the cuboid groove slides in conjunction with the cuboid blocks on the outer side of the ring. The notch block is a cylindrical structure, and the snap-fit ​​groove cooperates with the snap-fit ​​block.

[0012] Another technical solution proposed in this invention is: an automatic carbon sink measurement box for grassland ecosystems, characterized in that: the box includes the above-mentioned plug-in mechanism for an automatic carbon sink measurement box for grassland ecosystems.

[0013] Furthermore, each of the aforementioned automatic measuring chambers also includes a light-transmitting open chamber, an opaque dark chamber, a control box, and a threaded vertical rod; the open chamber is used for continuous measurement of NEE, and the dark chamber is used for measurement of ER.

[0014] Furthermore, the exposed box is made of a light-transmitting material, with an opening at the bottom and sealing material on each side of the bottom; the dark box has a white opaque material wrapped around its outer layer and a black opaque material covering its inner layer.

[0015] Both the exposed and dark boxes are equipped with a CO2 sensor, a thermometer, and a fan inside. The CO2 sensor and the thermometer are located at the top inside the box and are used to measure the CO2 concentration and temperature inside the box. The fan is located on the side of the box and is used to equalize the air concentration inside the box during CO2 measurement. The exposed box is also equipped with a light intensity sensor, which is located on the side wall of the box and extends into the box.

[0016] One of the technical solutions proposed in this invention is: an automatic carbon sink measurement system for grassland ecosystems, characterized in that: the system includes at least one set of carbon flux measurement modules and auxiliary modules having the aforementioned automatic carbon sink measurement box for grassland ecosystems; the carbon flux measurement modules are used to measure NEE and ER, the auxiliary modules are used to monitor meteorological information, soil temperature and humidity information, and vegetation growth status, and the information measured by the carbon flux measurement modules and the auxiliary modules is transmitted to a data terminal.

[0017] One of the technical solutions proposed in this invention is: an automatic carbon sink measurement method for grassland ecosystems, characterized in that: the method is used in the above-mentioned automatic carbon sink measurement system for grassland ecosystems to realize automatic carbon sink measurement;

[0018] The method includes:

[0019] S1, the carbon flux measurement module and the auxiliary module collect data every time interval T and send it to the central processing unit. The central processing unit calculates the soil carbon flux within each time interval T based on the received data, thereby calculating the total soil carbon flux M.

[0020] S2. The central processing unit calculates the CO2 volume concentration in the open and dark boxes at different times.

[0021] S3. Determine the emission ratio coefficients of carbon dioxide and the specified substances within the monitoring areas of the open and closed boxes;

[0022] *k

[0023] Among them, C 总 Cs is the emission concentration of the carbon dioxide; Cs is the monitoring concentration of the specified substance; k is the emission ratio coefficient.

[0024] S4. Calculate the emission concentration of carbon dioxide based on the monitored concentration of the specified substance and the emission ratio coefficient;

[0025] Within the area to be monitored, a first ratio of carbon dioxide emitted by the emission source to the specified substance is obtained through statistical survey.

[0026] Within the area to be monitored, a second ratio of carbon dioxide emitted by the emission source at a preset time to the specified substance is obtained by a monitoring method.

[0027] By combining the first ratio and the second ratio, the emission ratio coefficient of the carbon dioxide and the specified substance in the area to be monitored is obtained:

[0028] est+( est- (mon)

[0029] est / ( est+ (mon)

[0030] Wherein, k is the emission ratio coefficient of carbon dioxide and the specified substance in the area to be monitored; k_est is the first ratio of carbon dioxide emitted by emission sources and the specified substance obtained by statistical survey method in the area to be monitored; k_mon is the second ratio of carbon dioxide emitted by emission sources and the specified substance at a preset time obtained by monitoring method in the area to be monitored; p_est is the variance of k_est; p_mon is the variance of k_mon.

[0031] Compared with existing technologies, the beneficial effects of this application are: it solves the problems of relying on manual operation and low testing frequency, realizes continuous automatic observation of NEE and ER, and provides high-frequency and continuous carbon flux information for conducting process-based ecological carbon cycle research.

[0032] The traditional locking structure is optimized by inserting the plug-in structure into the fixed structure. The ring, connecting tube and notch block are moved backward, so that the snap block on the rear end face of the telescopic block disengages from the snap-in groove. Under the action of spring one, the telescopic block pops out along the telescopic groove and inserts into the slot, so that the plug-in structure is fixedly connected to the fixed structure, making the device easy and quick to install. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the automatic carbon sequestration measurement box for grassland ecosystems provided in Implementation 2 of this application;

[0035] Figure 2A schematic diagram of the internal structure of the open box of the automatic carbon sequestration measurement box for grassland ecosystem provided in Implementation 2 of this application;

[0036] Figure 3 A schematic diagram of the plug-in mechanism for the automatic carbon sequestration measuring box of grassland ecosystem provided for Implementation 1 of this application;

[0037] Figure 4 A partially enlarged structural diagram of point B of the plug-in mechanism for the automatic carbon sequestration measuring box of the grassland ecosystem provided for Implementation 1 of this application.

[0038] In the diagram: 1. Metal crossbar; 2. Connecting mechanism; 3. Measuring box body; 201. Rotary plug-in structure; 202. Locking structure; 301. Mounting base; 2011. Rear seat shaft; 2012. Plug-in shaft; 2013. Sealing groove one; 2014. Telescopic groove; 2021. Telescopic block; 2022. Limiting plate; 2023. Spring one; 2024. Snap-fit ​​block; 2025. Limiting groove; 2026. Ring; 2027. Cuboid groove; 2028. Connecting pipe; 2029. Notch block; 20210. Snap-fit ​​groove; 20211. Spring two; 302. Open box; 303. Closed box; 4. Control box; 5. Vertical rod; 6. CO2 sensor; 7. Thermometer; 8. Fan; 9. Light intensity sensor. Detailed Implementation

[0039] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Example 1

[0042] like Figure 3-4 As shown, an automatic carbon sink measurement box for grassland ecosystems has a plug-in mechanism, which includes a metal crossbar 1 and a connecting mechanism 2. The connecting mechanism 2 is located at the connection between the metal crossbar 1 and the measurement box body 3, and is used for electrical connection of the measurement box body 3 and replacement of the measurement box body 3.

[0043] The connecting mechanism 2 includes a rotating insertion structure 201 and a locking structure 202. The locking structure 202 is located on the surface of the metal crossbar 1. The rotating insertion structure 201 is used to insert the metal crossbar 1 into the mounting seat 301 on the upper surface of the measuring box body 3. The locking structure 202 is used to lock the metal crossbar 1 in the mounting seat 301 on the upper surface of the measuring box body 3.

[0044] Furthermore, the rotary plug-in structure 201 includes a rear seat shaft 2011, a plug-in shaft 2012 is installed at the center of the front end face of the rear seat shaft 2011, a sealing groove 2013 is provided on the outer side of the front end face of the rear seat shaft 2011, and a telescopic groove 2014 is provided in a circumferential array on the side of the plug-in shaft 2012.

[0045] Specifically, the locking structure 202 is located within the telescopic groove 2014.

[0046] Furthermore, the rear seat shaft 2011 is a cylindrical structure, the plug shaft 2012 is a hollow cylindrical structure, the diameter of the plug shaft 2012 is smaller than the diameter of the rear seat shaft 2011, the sealing groove 2013 is an annular structure, the telescopic groove 2014 is a cuboid structure, and the telescopic groove 2014 penetrates the plug shaft 2012.

[0047] Furthermore, the locking structure 202 includes a telescopic block 2021, with limit plates 2022 fixedly connected to the left and right sides of the telescopic block 2021. A spring 2023 is installed on the lower end face of the limit plate 2022, and a snap-fit ​​block 2024 is installed on the lower end face of the telescopic block 2021. Limit grooves 2025 are opened on the left and right sides of the telescopic groove 2014. A ring 2026 is installed inside the plug shaft 2012. A cuboid groove 2027 is opened on the inner side of the plug shaft 2012. A connecting pipe 2028 is fixedly connected to the rear end face of the ring 2026. A notch block 2029 is fixedly connected to the rear end face of the connecting pipe 2028. A snap-fit ​​groove 20210 is opened in a circumferential array on the side of the notch block 2029. A spring 20211 is installed on the rear end face of the notch block 2029.

[0048] Furthermore, the telescopic block 2021 has a cuboid structure and slides with the telescopic groove 2014. The limiting plate 2022 has a cuboid structure, the limiting groove 2025 has a cuboid structure and slides with the limiting plate 2022 and the limiting groove 2025. The snap-fit ​​block 2024 is an irregular cylinder. The ring 2026 slides with the inner side of the insertion shaft 2012. Cuboid blocks are installed in a circular array on the outer circumference of the ring 2026. The cuboid groove 2027 has a cuboid structure and slides with the cuboid blocks on the outer side of the ring 2026. The notch block 2029 has a cylindrical structure and the snap-fit ​​groove 20210 engages with the snap-fit ​​block 2024.

[0049] Specifically, during installation, the plug-in structure is inserted into the fixed structure, the top block is inserted into the plug-in shaft, and the ring, connecting pipe and notch block are moved backward so that the snap-fit ​​block on the rear end face of the telescopic block disengages from the snap-fit ​​groove. Under the action of spring one, the telescopic block pops out along the telescopic groove and inserts into the slot, so that the plug-in structure and the fixed structure are fixedly connected.

[0050] Example 2

[0051] like Figure 1-2 As shown, an automatic carbon sink measurement box for grassland ecosystems is provided, which includes a plug-in mechanism for an automatic carbon sink measurement box for grassland ecosystems as described in Example 1.

[0052] Furthermore, each of the automatic measuring boxes also includes a light-transmitting open box 302, an opaque dark box 303, a control box 4, and a threaded vertical rod 5; the open box 302 is used for continuous measurement of NEE, and the dark box 303 is used for measurement of ER.

[0053] Specifically, the control box 4 is equipped with a motor 10 for controlling the movement of the vertical rod 5, and a controller for controlling the measurement system. The bottom of the vertical rod 5 is coaxially connected to the output end of the motor. The motor is connected to the controller, and the controller controls the movement of the motor.

[0054] The measurement system is controlled by a controller and driven by a motor to move the vertical rod 5, along with the open box 302 and the dark box 303 connected to it. The vertical rod 5 is used as the axis to achieve 360° horizontal rotation and vertical lifting, so as to realize the sequential measurement of NEE and ER in the same measurement area.

[0055] Meanwhile, each experimental plot is equipped with at least one base. The base is a square metal frame with grooves around its perimeter containing sealing strips to ensure a tight seal during testing. The dimensions of the base correspond to those of the exposed box 302 and the dark box 303, and the interior of the base is lined with naturally growing vegetation. During use, when the exposed box 302 and the dark box 303 are lowered, they fit snugly against the grooves around the base, ensuring a tight seal during measurement. The number of bases can be set according to experimental needs.

[0056] Furthermore, the body of the light-transmitting box 302 is made of light-transmitting material, with an opening at the bottom and sealing material on each side of the bottom; the outer layer of the dark box 303 is wrapped with white opaque material, and the inner layer is covered with black opaque material to ensure the dark environment required for breath measurement.

[0057] Both the exposed box 302 and the dark box 303 are equipped with a CO2 sensor 6, a thermometer 7, and a fan 8 inside their enclosures. The CO2 sensor 6 and the thermometer 7 are located at the top inside the enclosure and are used to measure the CO2 concentration and temperature inside the enclosure. The fan 8 is located on the side of the enclosure and is used to equalize the air concentration inside the enclosure during CO2 measurement. Its measurement information is transmitted wirelessly through its built-in wireless transmission module. The exposed box 302 is also equipped with a light intensity sensor 9. The light intensity sensor 9 is located on the side wall of the enclosure and extends into the enclosure to calibrate with the natural light outside the enclosure.

[0058] In use, repeated measurements can be performed on multiple experimental plots. When the light box 302 is placed on a base, the net ecosystem carbon exchange (NEE) of the vegetation within that base is measured. When the dark box 303 rotates to the base, the respiration (ER) of the ecosystem within the base is measured due to the lack of light. After the instrument completes the measurement, the controller controls the motor to drive the vertical rod 5 to rotate, moving the light box 302 and the dark box 303 outside the measurement area to avoid affecting the normal growth of the plants within the base.

[0059] Example 3

[0060] An automatic carbon sink measurement system for grassland ecosystems is disclosed. The system includes at least one set of carbon flux measurement modules and auxiliary modules having an automatic carbon sink measurement box for grassland ecosystems as described in Example 2. The carbon flux measurement modules are used to measure NEE and ER, and the auxiliary modules are used to monitor meteorological information, soil temperature and humidity information, and vegetation growth status. The information measured by the carbon flux measurement modules and the auxiliary modules is transmitted to a data terminal.

[0061] Specifically, the auxiliary module includes a mounting frame, and meteorological monitoring sub-modules, vegetation monitoring sub-modules, soil monitoring sub-modules, and power supply sub-modules mounted on the mounting frame. The mounting frame is set up within the experimental plot, and the data terminal is also mounted on the mounting frame.

[0062] In this embodiment, the meteorological monitoring submodule includes a tipping bucket rain gauge for measuring precipitation, an air temperature and humidity sensor for measuring air temperature and humidity, a wind speed sensor for measuring wind speed, a wind direction sensor for measuring wind direction, and a photosynthetically active radiation sensor for measuring radiation.

[0063] The vegetation monitoring submodule includes a multispectral camera for measuring vegetation biomass and plant phenology, and a hyperspectral camera for measuring vegetation community characteristics and physiological and ecological attributes.

[0064] The soil monitoring submodule uses several soil temperature and humidity sensors to measure soil temperature and humidity.

[0065] The power supply submodule uses a solar power module in conjunction with a power supply or battery to provide power.

[0066] Example 4

[0067] An automatic carbon sink measurement method for grassland ecosystems, which is used in the automatic carbon sink measurement system for grassland ecosystems described in Example 3 to achieve automatic carbon sink measurement;

[0068] The method includes:

[0069] S1, the carbon flux measurement module and the auxiliary module collect data every time interval T and send it to the central processing unit. The central processing unit calculates the soil carbon flux within each time interval T based on the received data, thereby calculating the total soil carbon flux M.

[0070] S2. The central processing unit calculates the CO2 volume concentration in the open and dark boxes at different times.

[0071] S3. Determine the emission ratio coefficients of carbon dioxide and the specified substances within the monitoring areas of the open and closed boxes;

[0072] *k

[0073] Among them, C 总 Cs is the emission concentration of the carbon dioxide; Cs is the monitoring concentration of the specified substance; k is the emission ratio coefficient.

[0074] S4. Calculate the emission concentration of carbon dioxide based on the monitored concentration of the specified substance and the emission ratio coefficient;

[0075] Within the area to be monitored, a first ratio of carbon dioxide emitted by the emission source to the specified substance is obtained through statistical survey.

[0076] Within the area to be monitored, a second ratio of carbon dioxide emitted by the emission source at a preset time to the specified substance is obtained by a monitoring method.

[0077] By combining the first ratio and the second ratio, the emission ratio coefficient of the carbon dioxide and the specified substance in the area to be monitored is obtained:

[0078] est+( est- (mon)

[0079] est / ( est+ (mon)

[0080] Wherein, k is the emission ratio coefficient of carbon dioxide and the specified substance in the area to be monitored; k_est is the first ratio of carbon dioxide emitted by emission sources and the specified substance obtained by statistical survey method in the area to be monitored; k_mon is the second ratio of carbon dioxide emitted by emission sources and the specified substance at a preset time obtained by monitoring method in the area to be monitored; p_est is the variance of k_est; p_mon is the variance of k_mon.

[0081] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0082] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A plug-in mechanism for an automatic carbon sink measurement box for grassland ecosystems, comprising a metal crossbar (1) and a connecting mechanism (2), characterized in that: The connecting mechanism (2) is located at the connection between the metal crossbar (1) and the measuring box body (3), and is used for the electrical connection of the measuring box body (3) and the replacement of the measuring box body (3); The connecting mechanism (2) includes a rotating plug-in structure (201) and a locking structure (202). The locking structure (202) is located on the surface of the metal crossbar (1). The rotating plug-in structure (201) is used to insert the metal crossbar (1) into the mounting seat (301) on the upper surface of the measuring box body (3). The locking structure (202) is used to lock the metal crossbar (1) in the mounting seat (301) on the upper surface of the measuring box body (3). The rotary plug-in structure (201) includes a rear seat shaft (2011), a plug-in shaft (2012) is installed at the center of the front end face of the rear seat shaft (2011), a sealing groove (2013) is opened on the outer side of the front end face of the rear seat shaft (2011), and a telescopic groove (2014) is opened in a circular array on the side of the plug-in shaft (2012). The rear seat shaft (2011) is a cylindrical structure, the plug shaft (2012) is a hollow cylindrical structure, the diameter of the plug shaft (2012) is smaller than the diameter of the rear seat shaft (2011), the sealing groove (2013) is a circular structure, the telescopic groove (2014) is a cuboid structure, and the telescopic groove (2014) passes through the plug shaft (2012). The locking structure (202) includes a telescopic block (2021), with limit plates (2022) fixedly connected to the left and right sides of the telescopic block (2021), a spring (2023) installed on the lower end face of the limit plate (2022), a snap-fit ​​block (2024) installed on the lower end face of the telescopic block (2021), limit grooves (2025) opened on the left and right sides of the telescopic groove (2014), a ring (2026) installed inside the plug shaft (2012), a cuboid groove (2027) opened on the inner side of the plug shaft (2012), a connecting pipe (2028) fixedly connected to the rear end face of the ring (2026), a notch block (2029) fixedly connected to the rear end face of the connecting pipe (2028), a snap-fit ​​groove (20210) opened in a circular array on the side of the notch block (2029), and a spring (20211) installed on the rear end face of the notch block (2029). The telescopic block (2021) is a cuboid structure, and the telescopic block (2021) slides with the telescopic groove (2014). The limiting plate (2022) is a cuboid structure, the limiting groove (2025) is a cuboid structure, and the limiting plate (2022) slides with the limiting groove (2025). The snap-fit ​​block (2024) is an irregular column, and the ring (2026) slides with the inner side of the plug-in shaft (2012).

2. The plug-in mechanism for an automatic carbon sequestration measuring box for grassland ecosystems according to claim 1, characterized in that, A cuboid block is installed in a circular array on the outer side of the ring (2026). The cuboid groove (2027) is a cuboid structure. The cuboid groove (2027) slides with the cuboid block on the outer side of the ring (2026). The notch block (2029) is a cylindrical structure. The snap-fit ​​groove (20210) cooperates with the snap-fit ​​block (2024).

3. An automatic carbon sequestration measurement box for grassland ecosystems, characterized in that: The enclosure includes a plug-in mechanism for an automatic carbon sink measurement box for grassland ecosystems as described in any one of claims 1-2.

4. The automatic carbon sequestration measurement box for grassland ecosystems according to claim 3, characterized in that, Each of the aforementioned automatic measuring chambers also includes a light-transmitting open chamber (302), an opaque dark chamber (303), a control box (4), and a threaded vertical rod (5); the open chamber (302) is used for continuous measurement of NEE.

5. The automatic carbon sequestration measurement box for grassland ecosystems according to claim 4, characterized in that, The box (302) is made of light-transmitting material, with an opening at the bottom and sealing material on each side of the bottom; the box (303) is wrapped with white opaque material on the outer layer and covered with black opaque material on the inner layer. Both the open box (302) and the dark box (303) are equipped with a CO2 sensor (6), a thermometer (7), and a fan (8). The CO2 sensor (6) and the thermometer (7) are located at the top inside the box and are used to measure the CO2 concentration and temperature inside the box. The fan (8) is located on the side of the box and is used to equalize the air concentration inside the box when measuring CO2. The open box (302) is also equipped with a light intensity sensor (9). The light intensity sensor (9) is located on the side wall of the box and extends into the box.

6. An automatic carbon sequestration measurement system for grassland ecosystems, characterized in that: The system includes at least one set of carbon flux measurement modules and auxiliary modules with an automatic carbon sink measurement box for grassland ecosystems as described in claim 5; the auxiliary modules are used to monitor meteorological information, soil temperature and humidity information and vegetation growth status, and the information measured by the carbon flux measurement modules and the auxiliary modules is transmitted to a data terminal.

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