LU500331B1

LU500331B1 - Removable Device for Measuring Respiration Rate of Shrub Ecosystem

Info

Publication number: LU500331B1
Application number: LU500331A
Authority: LU
Inventors: Huimin Wu; Yajuan Wei; Qin Ha; Yang Liu; Bonian Zhu; Xiaohong Dang; Zhongju Meng; Shan Wang; Yong Gao; Yanlong Han; Bo Lin; Bo Zhai
Original assignee: Univ Inner Mongolia Agri
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-01-07

Abstract

It comprises a base, a measuring box, a CO2 gas analyzer, a ventilation fan and a battery. Wherein both the CO2 gas analyzer and the ventilation fan are connected with the battery. The base has a cylindrical structure with open upper and lower ends. The measuring box has a cylindrical structure with open lower end and sealed upper end through an openable cover plate. The base is sleeved on the shrub. The lower end of the base is inserted into the soil. The upper end of the base is matched with the open end of the measuring box and is hermetically and detachably connected. The ventilation fan, CO2 gas analyzer and battery are all installed on the inner side walls of the measuring box. According to the invention, multiple bases can be manufactured as required by detachably connecting the bases with the measuring box.

Description

DESCRIPTION Removable Device for Measuring Respiration Rate of Shrub Ecosystem

TECHNICAL FIELD The invention relates to the field of ecosystem monitoring, particularly to a detachable device for measuring respiration rate of shrub ecosystem.

BACKGROUND With the development of industry and the increase of human activities, the concentration of CO; in the atmosphere is on the rise. The emission of chemical industry greenhouse gases, automobile exhaust, greenhouse gases from forest fires, and a large number of greenhouse gases from thermal power plants have led to ecological environmental problems such as rising atmospheric temperature, frequent extreme weather, climate tending to drought, melting of polar ice and snow, and rising sea level in recent years. The main ways to reduce atmospheric greenhouse gases are cutting off pollution sources (shutting down heavily polluted industries and thermal power plants) and developing clean energy (making full use of solar energy and wind energy, etc.). Another key way is that plants absorb CO; in the atmosphere through photosynthesis and release O». From the perspective of global carbon balance, it is found that human beings emit 7.0Pg C/a into the atmosphere through the burning of fossil fuels and land use changes. The carbon remaining in the atmosphere is 3.4Pg C/a, while the carbon absorbed by marine ecosystems 1s 3.4Pg C/a, so 1.63.4Pg C/a is missing. Therefore carbon sequestration has become the core issue of global carbon cycle research. From the current research, carbon sequestration 1s most likely to exist in terrestrial ecosystems, but its location and intensity are uncertain.

At present, domestic and overseas scholars mainly focus on the carbon budget of terrestrial ecosystems in low latitude and low altitude areas, and relatively few on high latitude and high altitude areas. The research objects are mainly forests, grasslands, wetlands and farmland. However, the fixed carbon absorbed by forests and grasslands 1s still less than the lost carbon every year. Moreover, farmland is considered as an important carbon source. In view of this, many researchers have turned their research objects into desert ecosystems that have been neglected for a long time. Shrub 1s the main vegetation type in arid and semi-arid areas, so accurate monitoring of shrub ecosystem respiration is of great significance to the study of global carbon sequestration. At present, there is no device to measure the respiration of ecosystem. At present, the main numerical methods for measuring gas concentration include alkali absorption method, static box method, dynamic box method, meteorological chromatography method, micro-meteorological measurement method and infrared carbon dioxide detection method, etc. The existing ideal method for measuring soil respiration is Fourier transform infrared spectroscopy, such as LI-8100 and LI-6400 devices produced by American Gene Company. However, this device is inconvenient to carry in desert areas. It is expensive, fast in power consumption and difficult to charge. It is also short in optical path and small in soil respiration chamber area, therefore leading to low measurement accuracy. Moreover, this device can not measure the respiration of soil layer, litter layer and shrub layer at the same time.

SUMMARY The technical problem to be solved by the invention is to provide a detachable device for measuring respiration rate of shrub ecosystem aiming at the defects of the prior art.

The technical scheme for solving the technical problems is as follows.

The detachable device for measuring the respiration rate of shrub ecosystem comprises a base, a measuring box, a CO» gas analyzer, a ventilation fan and a battery.

Wherein both the CO, gas analyzer and the ventilation fan are connected with the battery.

The base has a cylindrical structure with open upper and lower ends.

The measuring box has a cylindrical structure with open lower end and sealed upper end through an openable cover plate.

The base is sleeved on the shrub.

The lower end of the base is inserted into the soil, and the upper end of the base is matched with the open end of the measuring box and is hermetically and detachably connected.

The ventilation fan, the CO; gas analyzer and the battery are all installed on the inner side walls of the measuring box.

The invention has the beneficial effects as follows.

According to the invention, multiple bases can be manufactured as required by detachably connecting the bases with the measuring box.

The positions of the bases can be kept unchanged by integrally moving the measuring box.

Therefore repeated measurement among various points can be realized.

By setting the CO» gas analyzer and the ventilation fan, the respiration of soil layer, litter layer and shrub layer in shrub ecosystem can be measured.

Thus the edge effect and soil spatial heterogeneity are reduced, and the CO: concentration in shrub ecosystem can be measured more precisely.

On the basis of the above technical scheme, the invention can also be improved as follows.

Further, the measuring box comprises four side plates.

The four side plates are hermetically and detachably connected in sequence to form a square cylindrical structure with open upper and lower ends.

The lower end of the square cylindrical structure 1s hermetically and detachably connected with the upper end of the base.

The cover plate 1s hinged at the upper end of one of the side plates.

The ventilation fan, the CO; gas analyzer and the battery are all installed on the inner side walls of the side plates.

The adoption of the further scheme has the beneficial effects as follows.

The four side plates can be disassembled and assembled at any time outside the field by sealing and detachably connecting the four side plates.

Therefore it is convenient to carry and transport.

Furthermore, the four side plates are hermetically and detachably connected in turn to form a square cylindrical structure with open upper and lower ends through magnetic strips and sealing strips in turn.

The adoption of the above further scheme has the beneficial effects as follows.

The four side plates can be conveniently disassembled and installed by connecting the four side plates through magnetic strips in turn.

Further, the device also comprises a hydraulic telescopic buffering support rod.

The four side plates are respectively a front side plate, a left side plate, a rear side plate and a right side plate.

The cover plate is hinged at the upper end of the rear side plate.

One end of the hydraulic telescopic buffering support rod is rotatably connected to the inner side wall of the left side plate or the right side plate.

The other end is rotatably connected to the inner side surface of the cover plate.

The adoption of the above further scheme has the beneficial effects as follows.

With the arrangement of the hydraulic buffering support rod, 1t is convenient to open or close the cover plate, hence there is a certain supporting and buffering effect.

Furthermore, bearings are arranged on the inner side walls of the left side plate and the right side plate.

One end of the hydraulic telescopic buffering support rod is fixedly connected with the inner ring of the bearings.

Furthermore, among the four side plates, one of the two connected side plates is provided with an anti-skid groove at the joint, and the other side plate is provided with an anti-skid protrusion at the joint.

The anti-skid protrusion and the anti-skid groove are correspondingly arranged and are adapted to be inserted.

The adoption of the above further scheme has the beneficial effects as follows.

By arranging the anti-slip grooves and the protective protrusions, the problem that the side plates are easy to slide when connected by magnetic attraction is avoided.

Furthermore, among the four side plates, two connected side plates are locked by buckles.

The adoption of the above further scheme has the beneficial effects as follows.

The structure of the measuring box is more stable by locking the two connected side plates through buckles.

Further, the base comprises a fixed cylinder and a inserting ring which are sequentially and integrally connected along the axial direction of the base.

The lower end of the fixed cylinder is inserted into the soil.

The upper end of the fixed cylinder is integrally connected with the lower end face of the inserting ring.

The upper end face of the inserting ring is provided with a circle of inserting groove along the circumferential direction.

The lower ends of the four side plates are hermetically connected in the inserting groove through magnetic strips and sealing strips. The adoption of the above further scheme has the beneficial effects as follows. The side plates can be inserted into the inserting groove by arranging the fixed cylinder and the inserting ring. Therefore the sealing performance of the side plates and the base 1s better and the connection 1s more stable. Further, the thickness of the fixed cylinder gradually decreases from top to bottom. The adoption of the further scheme has the beneficial effects as follows. The thickness of the fixed cylinder 1s set to gradually decrease from top to bottom. Therefore the base can be conveniently smashed into the soil. Further, the measuring box also comprises a handle which 1s fixed on the outer wall of the side plate. The side plates and the cover plate are made of organic glass. The adoption of the further scheme has the beneficial effects as follows. The measuring box 1s convenient to move by arranging the handle. The side plates and cover plate are made of organic glass. Therefore it is convenient to observe the situation in the measuring box.

BRIEF DESCRIPTION OF THE FIGURES Figure 1 A schematic diagram of the three-dimensional structure of the device of the present invention Figure 2 A schematic diagram of the three-dimensional structure of the inserting ring of the present invention

Figure 3 A schematic three-dimensional structure diagram of a part of the connecting structure of the fixed cylinder and the inserting ring of the base according to the present invention Figure 4 A schematic diagram of the connecting structure of the hydraulic telescopic buffering support rod and the side plates of the present invention Figure 5 A exploded schematic diagram of the connecting structure between two connected side plates according to the present invention Figure 6 A schematic diagram of the buckle structure of the present invention Figure 7 A schematic diagram of the device in use In the drawings, the parts represented by each reference number are listed as follows.

1. Base; 11. Fixed cylinder; 12. Inserting ring; 121. Inserting groove; 2. Measuring box;

21. Front side plate; 22. Left side plate; 23. Rear side plate; 24. Right side plate; 25. Cover plate; 26. Magnetic strip; 27. Sealing strip; 28. Bearing; 29. Anti-skid groove; 290. Anti-skid protrusion; 3. CO» gas analyzer; 4. Ventilation fan; 5. Battery; 6. Hydraulic telescopic buffering support rod; 61. Connecting bolt; 7. Buckle; 71. Hook; 72. Locking bolt; 8. Handle; 9. Soil

DESCRIPTION OF THE INVENTION The following describes the principles and characteristics of the present invention with reference to the accompanying drawings. The examples are only used to explain the present invention, but not to limit the scope of the present invention. As shown in Figure 1 to Figure 7, a detachable device for measuring respiration rate of shrub ecosystem in this embodiment includes a base 1, a measuring box 2, a CO; gas analyzer 3, a ventilation fan 4 and a battery 5. Both the CO» gas analyzer 3 and the ventilation fan 4 are connected with the battery 5. The base 1 has a cylindrical structure with open upper and lower ends.

The measuring box 2 has a cylindrical structure with open lower end and sealed upper end through an openable cover plate 25. The base 1 is sleeved on a shrub.

The lower end of the base 1 is inserted into soil 9. The upper end of the base 1 is matched with the open end of the measuring box 2 and is hermetically and detachably connected.

The ventilation fan 4, the CO; gas analyzer 3 and the battery 5 are all installed on the inner side walls of the measuring box 2. In this embodiment, multiple bases can be manufactured as required by detachably connecting the bases with the measuring box.

Therefore repeated measurement among various points can be realized.

By setting the CO; gas analyzer and the ventilation fan, the edge effect and soil spatial heterogeneity are reduced, and the COzconcentration in shrub ecosystem can be measured precisely.

As shown in Figure 1, the measuring box 2 in this embodiment includes four side plates.

The lower end of the square cylindrical structure is hermetically and detachably connected with the upper end of the base 1. The cover plate 25 is hinged at the upper end of one of the side plates.

In this embodiment, the four side plates are hermetically and detachably connected, thus they can be disassembled and assembled at any time in the field, and is convenient for carrying and transportation.

As shown in Figure 5, the four side plates in this embodiment are sequentially connected by magnetic strips 26 and sealing strips 27 in turn to form a square cylindrical structure with open upper and lower ends.

The four side plates are connected by magnetic strips in turn.

Therefore it is convenient for disassembly and installation.

Preferably, in this embodiment, a magnetic strip 26 can be fixed on the inner side of one side plate near the edge, a magnetic strip 26 can be fixed on the edge of the other side plate.

A sealing strip 27 can be hermetically connected to the magnetic strip 26. Then one side plate can be abutted against the edge of the other side plate to realize the sealed magnetic connection between the two side plates.

As shown in Figure 1, the device of this embodiment also includes a hydraulic telescopic buffering support rod 6. The four side plates are respectively a front side plate 21, a left side plate 22, a rear side plate 23 and a right side plate 24. The cover plate 25 is hinged at the upper end of the rear side plate 23 by hinges.

One end of the hydraulic telescopic buffering support rod 6 is rotatably connected to the inner side wall of the left side plate 22 or the right side plate 24. The other end is rotatably connected to the inner side surface of the cover plate 25. When the cover plate 25 is opened, the hydraulic telescopic buffering support rod 6 rotates and extends.

When the cover plate 25 is closed, the hydraulic telescopic buffering support rod 6 rotates and compresses and shortens.

With the arrangement of the hydraulic buffering support rod, it is convenient to open or close the cover plate, hence there is a certain supporting and buffering effect.

As shown in Figure 1 and Figure 4, the inner side walls of the left side plate 22 and the right side plate 24 in this embodiment are both provided with shaft bearings 28. One end of the hydraulic telescopic buffering support rod 6 is fixedly connected with the inner ring of the bearings 28.

There are two ventilation fans 4 in this embodiment. They are respectively installed on the left side plate 22 and the right side plate 24. As shown in Figure 5, among the four side plates in this embodiment, one of the two connected side plates 1s provided with an anti-skid groove 29 at the joint, and the other side plate is provided with an anti-skid protrusion 290 at the joint. The anti-skid protrusion 290 and the anti-skid groove 29 are correspondingly arranged and adapted to be inserted. By arranging the anti-skid grooves and the protective protrusions, the problem that the side plates are easy to slide when connected by magnetic attraction is avoided. In Figure 5, in order to show the relative positions of the anti-skid protrusions and the anti-skid grooves, the anti-skid grooves are shown with dashed lines. As shown in Figure 1 and Figure 6, among the four side plates in this embodiment, two connected side plates are locked by buckles 7. The structure of the measuring box is more stable by locking the two connected side plates through buckles. Preferably, a hook 71 can be arranged on the edge of the left side plate 22, and a locking bolt 72 is fixed on the front side plate 21. The hook 71 is rotatably connected to the egde of the left side plate 22. The locking bolt 72 is rotatably connected to the front side plate

21. A locking ring is rotatably connected to the locking bolt 72. The locking ring is hung on the hook 71, and then the locking bolt is rotated away from the hook. Therefore the locking ring and the hook can be clamped. As shown in Figure 3 and Figure 7, the base 1 of this embodiment includes a fixed cylinder 11 and a inserting ring 12 which are sequentially and integrally connected along the axial direction of the base 1. The lower end of the fixed cylinder 11 is inserted into the soil 9. The upper end of the fixed cylinder 11 is integrally connected with the lower end face of the inserting ring 12. By arranging the fixed cylinder and the inserting ring, the side plate can be inserted into the inserting groove. Therefore making the sealing performance of the side plates and the base better and the connection more stable. As shown in Figure 2, Figure 3 and Figure 7, the upper end face of the inserting ring 12 in this embodiment is provided with a circle of inserting groove 121 along its circumferential direction. The lower ends of the four side plates are hermetically connected in the inserting groove 121 through magnetic strips 26 and sealing strips 27. The magnetic strip 1s arranged in the inserting groove, and the sealing strip covers the magnetic strip. As shown in Figure 3 and 7, the thickness of the fixed cylinder 11 in this embodiment gradually decreases from top to bottom. By setting the thickness of the fixed cylinder to gradually decrease from top to bottom, it is convenient to smash the base into the soil. The base of this embodiment is made of stainless steel. As shown in Figure 1, the measuring box 2 of this embodiment further includes a handle

8. It 1s fixed on the outer wall of the side plate. The four side plates and one cover plate are all made of organic glass. By setting the handle, it is convenient to move the measuring box. The side plate and cover plate are made of organic glass. Therefore it is convenient to observe the situation in the measuring box. The use process of the detachable device for measuring respiration rate of shrub ecosystem in this embodiment is as follows. When measuring respiration rate of multiple shrub ecosystems, multiple bases can be sleeved on the shrub first. When measuring respiration rate of one shrub ecosystem is needed, the measuring box can be covered on one base to ensure that the canopy width of the shrub is smaller than the inner diameter of the measuring box by 3cm-5cm. When measuring the respiration of shrub ecosystem, first turn on the ventilation fan to fully and evenly mix the air inside and outside the measuring box. Record the CO» concentration measured by the CO» concentration analyzer, and then turn the cover plate, so that the cover plate and the upper end of the side plates of the measuring box are sealed and adsorbed by magnetic strips and sealing strips. Thus ensuring the absolute sealing effect. After the preset time, the cover plate 1s opened to record the CO», concentration measured by the CO» concentration analyzer again. The respiration rate of shrub ecosystem (shrub layer, root layer, litter layer and soil layer) is expressed by the ratio of CO. concentration difference before and after measurement to the preset time.

The above 1s only a preferred embodiment of the present invention, and 1s not intended to limit the present invention. Any modifications, equivalent substitutions, improvements and the like made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A detachable device for measuring respiration rate of shrub ecosystem is is characterized by comprising a base (1), a measuring box (2), a CO» gas analyzer (3), a ventilation fan (4) and a battery (5), wherein the CO, gas analyzer (3) and the ventilation fan (4) are all connected with the battery (5); the base (1) has a cylindrical structure with open upper and lower ends, and the measuring box (2) has a cylindrical structure with open lower end and sealed upper end through an openable cover plate (25); the base (1) 1s sleeved on the shrub, the lower end of the base is inserted into the soil (9), and the upper end of the base is matched with the open end of the measuring box (2) and is hermetically and detachably connected; the ventilation fan (4), the CO; gas analyzer (3) and the battery (5) are all installed on the inner side walls of the measuring box (2).

2. The detachable device for measuring the respiration rate of shrub ecosystem according to claim 1 is characterized in that the measuring box (2) comprises four side plates; the four side plates are hermetically and detachably connected in sequence to form a square cylindrical structure with open upper and lower ends, and the lower end of the square cylindrical structure is hermetically and detachably connected with the upper end of the base (1); the cover plate (25) is hinged at the upper end of one of the side plates; the ventilation fan (4), the CO, gas analyzer (3) and the battery (5) are all installed on the inner side walls of the side plates.

3. The detachable device for measuring the respiration rate of shrub ecosystem according to claim 2 1s characterized in that the four side plates are hermetically and detachably connected through magnetic strips (26) and sealing strips (27) in turn to form a square cylindrical structure with open upper and lower ends.

4. The detachable device for measuring the respiration rate of shrub ecosystem according to claim 3 1s characterized by further comprising a hydraulic telescopic buffering support rod (6); the four side plates are respectively a front side plate (21), a left side plate (22), a rear side plate (23) and a right side plate (24), and the cover plate (25) is hinged at the upper end of the rear side plate (23); one end of the hydraulic telescopic buffering support rod (6) 1s rotatably connected to the inner side wall of the left side plate (22) or the right side plate (23), and the other end is rotatably connected to the inner side surface of the cover plate (25).

5. The detachable device for measuring the respiration rate of shrub ecosystem according to claim 4 is characterized in that bearings (28) are arranged on the inner side walls of the left side plate (22) and the right side plate (24), and one end of the hydraulic telescopic buffering support rod (6) is fixedly connected with the inner ring of the bearings (28).

6. The detachable device for measuring the respiration rate of shrub ecosystem according to any one of claims 2 to 5 is characterized in that among the four side plates, one of the two connected side plates is provided with an anti-skid groove (29) at the joint, and the other is provided with an anti-skid protrusion (290) at the joint, and the anti-skid protrusion (290) and the anti-skid groove (29) are arranged correspondingly and adapted to be inserted.

7. The detachable device for measuring the respiration rate of shrub ecosystem according to claim 6 is characterized in that two connected side plates among the four side plates are locked by buckles (7).

8. The detachable device for measuring the respiration rate of shrub ecosystem according to any one of claims 2 to 5 and 7 is characterized in that the base (1) comprises a fixed cylinder (11) and a inserting ring (12) which are sequentially and integrally connected along the axial direction of the base (1); the lower end of the fixed cylinder (11) is inserted into the soil (9), and the upper end thereof 1s integrally connected with the lower end face of the inserting ring (12); the upper end face of the inserting ring (12) is provided with a circle of inserting groove (121) along the circumferential direction; the lower ends of the four side plates are hermetically connected in the inserting groove (121) through magnetic strips (26) and sealing strips (27).

9. The detachable device for measuring the respiration rate of shrub ecosystem according to claim 8 is characterized in that the thickness of the fixed cylinder (11) gradually decreases from top to bottom.

10. The detachable installation for measuring the respiration rate of shrub ecosystem according to any one of claims 2 to 5, 7 and 9 is characterized in that the measuring box (2) further comprises a handle (8), and the handle (8) 1s fixed on the outer wall of the side plate; the side plates and the cover plate (25) are made of organic glass.