An experimental device for in-situ measurement of tree branch respiration
By designing an in-situ experimental device for measuring the respiration rate of tree branches, and utilizing a sealed system consisting of a transparent PC container and an aluminum alloy bottom cover, combined with a gas analyzer, the shortcomings of in vitro measurement and alkaline absorption methods were overcome, and a more accurate measurement of the respiration rate of tree branches was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- AOZUO ECOLOGY INSTR LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-07-03
AI Technical Summary
In existing technologies, the in vitro measurement of plant branch respiration rate is subject to problems such as traumatic respiration leading to higher data, and the alkaline absorption method is subject to problems such as insufficient absorption or environmental interference leading to large errors, resulting in inaccurate measurement data.
An in-situ experimental device for measuring tree branch respiration was designed. The device utilizes a sealed system consisting of a transparent PC barrel, an aluminum alloy bottom cover, and a top cover. The sealing is ensured by a sealing gasket and high-density lubricating grease. Combined with a gas analyzer, the device measures the changes in CO2 concentration in real time and calculates the photosynthetic rate or respiration rate of the branches.
This method reduces interference factors without affecting the physiological function of branches, improves the accuracy of measurement data, avoids the shortcomings of in vitro measurement and alkali absorption method, and provides more accurate measurement results.
Smart Images
Figure CN224456722U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plant branch measurement technology, specifically an experimental device for in-situ measurement of branch respiration. Background Technology
[0002] Traditional methods for measuring plant branch respiration often employ in vitro measurements (e.g., immediate measurement after cutting) or alkaline absorption methods, but these methods have significant drawbacks: in vitro measurements can lead to inflated data due to traumatic respiration, while alkaline absorption methods can result in large errors due to insufficient absorption or environmental interference. For example, early studies showed that in vitro measurements could artificially inflate the respiration rate by more than 30% due to cutting damage, while the absorption efficiency of alkaline absorption methods may decrease by 50% under high-temperature environments. Both of these methods are prone to inaccurate measurement data.
[0003] Therefore, it is necessary to design a practical experimental device for in-situ measurement of tree branch respiration. Utility Model Content
[0004] The purpose of this invention is to provide an experimental device for in-situ measurement of tree branch respiration, so as to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an experimental device for in-situ measurement of tree branch respiration, comprising a transparent PC barrel, an aluminum alloy bottom cover fixedly connected to the front end of the transparent PC barrel by screws and nuts, a top cover rotatably connected to the rear end of the transparent PC barrel by a hinge, the upper end of the top cover being fixedly connected to the transparent PC barrel by wing screws and nuts, a quick-connect connector provided on the top cover, the number of quick-connect connectors being two, an air tube connected to the quick-connect connector, one end of the air tube being connected to a manual switching valve, a gland provided on the top cover, a flange fixing plate fixedly connected to the lower end of the transparent PC barrel by screws, an adjusting block fixedly connected to the flange fixing plate by screws, a clamping component rotatably connected to the lower end of the adjusting block by a rotating shaft, fasteners provided on the adjusting block, and a tripod installed at the lower end of the clamping component.
[0006] According to the above technical solution, the aluminum alloy bottom cover includes two half-bottom covers arranged symmetrically. Each half-bottom cover has a groove. A first connecting plate is provided at the upper and lower positions of the connection on one side of each half-bottom cover. A second connecting plate is provided at the upper and lower positions of the connection on the other side of each half-bottom cover. The first and second connecting plates are used to splice and fix the two half-bottom covers together with screws and nuts. A connecting sealing gasket is provided between the half-bottom cover and the first connecting plate. The connecting sealing gasket has an opening that communicates with the groove. A pressure plate is provided on one side of the connecting sealing gasket and on both sides of the opening. The pressure plate is fixedly connected to the half-bottom cover with screws and nuts.
[0007] According to the above technical solution, a bottom sealing gasket is provided at the connection between the aluminum alloy bottom cover and the transparent PC barrel.
[0008] According to the above technical solution, an end cap sealing gasket is provided at the connection between the top cover and the transparent PC barrel.
[0009] According to the above technical solution, a stirring fan is installed on one side of the top cover.
[0010] Compared with the prior art, the beneficial effects achieved by this utility model are:
[0011] In use, this invention involves inserting branches into the slots on two half-bottom covers, which are then joined together to form an aluminum alloy bottom cover. High-density grease is used to fill the gaps around the branches, achieving a seal without damaging them during subsequent disassembly. The aluminum alloy bottom cover is then fixedly connected to a transparent PC container, while the top cover is a quick-opening and closing integrated plate. Opening the top cover allows the transparent PC container to connect to the outside environment, ensuring the branches are in a free growth environment. During measurement, closing the top cover isolates the branches inside the transparent PC container from the outside air, forming a sealed measurement space. A gas tube is then connected to a gas analyzer via a manual switching valve to measure and record changes in CO2 concentration in real time. Combined with the volume of the respiration chamber, the photosynthetic rate or respiration rate of the branches can be calculated. Compared with in vitro determination or alkaline absorption methods, this invention's measurement method has fewer interference factors and provides more accurate measurement data. Attached Figure Description
[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;
[0014] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;
[0015] Figure 3 This is a partial structural schematic diagram of the present invention;
[0016] Figure 4 This is a partial cross-sectional structural diagram of the present invention;
[0017] Figure 5 for Figure 4 A magnified structural diagram of part A in the middle.
[0018] In the diagram: 1-Transparent PC bucket, 2-Aluminum alloy bottom cover, 201-Half bottom cover, 202-Slot, 203-First connecting plate, 204-Second connecting plate, 205-Connecting sealing gasket, 206-Pressure plate, 3-Hinge, 4-Top cover, 5-Quick connector, 6-Air pipe, 7-Manual switching valve, 8-Glans head, 9-Flange fixing plate, 10-Adjusting block, 11-Clamping piece, 12-Fastener, 13-Tripod, 14-Bottom sealing gasket, 15-End cover sealing gasket, 16-Agitator fan. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figure 1-5 This utility model provides a technical solution: an experimental device for in-situ measurement of tree branch respiration, comprising a transparent PC barrel 1. The front end of the transparent PC barrel 1 is fixedly connected to an aluminum alloy bottom cover 2 via screws and nuts. The rear end of the transparent PC barrel 1 is rotatably connected to a top cover 4 via a hinge 3. The upper end of the top cover 4 is fixedly connected to the transparent PC barrel 1 via wing screws and nuts. The top cover 4 is a single, easily openable cover. Opening the top cover 4 allows the transparent PC barrel 1 to communicate with the outside environment, ensuring the branches are in a free growth environment. During measurement, closing the top cover 4 isolates the branches inside the transparent PC barrel 1 from the outside air, forming a sealed measurement space. The top cover 4 can be manually tightened using wing screws and nuts to ensure a secure connection between the top cover 4 and the transparent PC barrel 1. The top cover 4 is equipped with two quick-connect fittings 5, each connected to a trachea 6. One end of the trachea 6 is connected to a manual switching valve 7. By connecting the trachea to the manual switching valve 7 and then to the gas analyzer, the CO2 concentration change can be measured and recorded in real time. Combined with the volume of the breathing chamber, the photosynthetic rate or respiration rate of the branches can be calculated. The manual switching valve 7 can be manually operated to close the gas path between the breathing chamber and the analyzer. The top cover 4 is provided with a gland 8. The lower end of the transparent PC barrel 1 is fixedly connected to a flange fixing plate 9 by screws. The flange fixing plate 9 is fixedly connected to an adjusting block 10 by screws. The lower end of the adjusting block 10 is rotatably connected to a clamping member 11 through a rotating shaft. The adjusting block 10 is provided with a fastener 12. The angle of the transparent PC barrel 1 can be adjusted by the cooperation of the adjusting block 10, the clamping member 11 and the fastener 12. The lower end of the clamping member 11 is equipped with a tripod 13, which can support the transparent PC barrel 1.
[0021] The aluminum alloy bottom cover 2 includes two half-bottom covers 201 arranged symmetrically. Each half-bottom cover 201 has a slot 202. A first connecting plate 203 is provided at the upper and lower positions of the connection point on one side of each half-bottom cover 201, and a second connecting plate 204 is provided at the upper and lower positions of the connection point on the other side of each half-bottom cover 201. The first connecting plate 203 and the second connecting plate 204 are used to splice and fix the two half-bottom covers 201 together with screws and nuts. A connecting sealing gasket 205 is provided between the half-bottom cover 201 and the first connecting plate 203. The connecting sealing gasket 205 has an opening communicating with the slot 202. A pressure plate 206 is provided on one side of the sealing gasket 205 and on both sides of the opening. The pressure plate 206 is fixedly connected to the half-bottom cover 201 by screws and nuts. In use, the branch can be inserted into the groove 202 on the two half-bottom covers 201. Through the setting of the first connecting plate 203, the second connecting plate 204, the connecting sealing gasket 205 and the pressure plate 206, and with the cooperation of screws and nuts, the two half-bottom covers 201 can be spliced and fixed into an aluminum alloy bottom cover 2. The setting of the connecting sealing strip 205 ensures the sealing of the connection between the two half-bottom covers 201. The gaps around the branch can be filled with high-density grease to achieve the sealing around the branch, and at the same time, the branch will not be damaged during subsequent disassembly.
[0022] The aluminum alloy bottom cover 2 and the transparent PC barrel 1 are connected by a bottom sealing gasket 14. The bottom sealing gasket 14 ensures the airtightness of the connection between the transparent PC barrel 1 and the aluminum alloy bottom cover 2.
[0023] The top cover 4 and the transparent PC barrel 1 are connected by an end cap sealing gasket 15. The end cap sealing gasket 15 ensures the sealing of the connection between the transparent PC barrel 1 and the top cover 4.
[0024] A stirring fan 16 is installed on one side of the top cover 4. The stirring fan 16 can mix the internal gas.
[0025] Working Principle: In use, branches are inserted into the slots 202 on the two half-bottom covers 201. Through the arrangement of the first connecting plate 203, the second connecting plate 204, the connecting sealing gasket 205, and the pressure plate 206, and with the cooperation of screws and nuts, the two half-bottom covers 201 can be spliced and fixed into an aluminum alloy bottom cover 2. The connecting sealing strip 205 ensures the sealing of the connection between the two half-bottom covers 201. High-density grease can be used to fill the gaps around the branches, achieving a seal around the branches and preventing damage to the branches during subsequent disassembly. The aluminum alloy bottom cover 2 is then connected to the transparent PC container 1 with screws and nuts. The top cover 4 is a quick-opening and closing integral cover. Opening the top cover 4 allows the transparent PC container 1 to communicate with the outside, ensuring the branches are in a free growth environment. During measurement, the top cover 4 is closed, allowing the transparent PC container 1 to... The internal branches are isolated from the outside air, forming a sealed measurement space. The top cover 4 and the transparent PC container 1 are secured by manual tightening with wing screws and nuts. The bottom sealing gasket 14 and the end cap sealing gasket 15 ensure the airtightness of the connection between the transparent PC container 1, the aluminum alloy bottom cover 2, and the top cover 4. A gas analyzer is then connected to the manual switching valve 7 via a gas tube, allowing for real-time measurement and recording of CO2 concentration changes. Combined with the respiration chamber volume, the photosynthetic rate or respiration rate of the branches can be calculated. To ensure that the normal physiological functions of the branches are not affected by the measuring device, the top cover 4 is generally closed for no more than 3 minutes; the top cover remains open for the rest of the time to allow the branches to grow normally under external conditions. Compared with in vitro measurement or alkaline absorption methods, the measurement method of this invention has fewer interfering factors and provides more accurate measurement data.
[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An experimental apparatus for in-situ measurement of tree branch respiration, comprising a transparent PC container (1), characterized in that: The front end of the transparent PC bucket (1) is fixedly connected to an aluminum alloy bottom cover (2) by screws and nuts. The rear end of the transparent PC bucket (1) is rotatably connected to a top cover (4) by a hinge (3). The upper end of the top cover (4) is fixedly connected to the transparent PC bucket (1) by a wing screw and wing nut. The top cover (4) is provided with a quick-connect connector (5). There are two quick-connect connectors (5). An air tube (6) is connected to the quick-connect connector (5). One end of the transparent PC bucket (1) is connected to a manual switching valve (7), and a gland head (8) is provided on the top cover (4). The lower end of the transparent PC bucket (1) is fixedly connected to a flange fixing plate (9) by screws. The flange fixing plate (9) is fixedly connected to an adjusting block (10) by screws. The lower end of the adjusting block (10) is rotatably connected to a clamping member (11) through a rotating shaft. The adjusting block (10) is provided with a fastener (12), and the lower end of the clamping member (11) is equipped with a tripod (13).
2. The apparatus according to claim 1, wherein: The aluminum alloy bottom cover (2) includes two half-bottom covers (201) arranged symmetrically. Each half-bottom cover (201) has a slot (202). A first connecting plate (203) is provided at the upper and lower positions of the connection point on one side of each half-bottom cover (201), and a second connecting plate (204) is provided at the upper and lower positions of the connection point on the other side of each half-bottom cover (201). The first connecting plate (203) and the second connecting plate (204)... 204) The two half-bottom covers (201) are spliced and fixed by the cooperation of screws and nuts. A connecting sealing gasket (205) is provided between the half-bottom cover (201) and the first connecting plate (203). The connecting sealing gasket (205) has an opening that communicates with the groove (202). A pressure plate (206) is provided on one side of the connecting sealing gasket (205) and on both sides of the opening. The pressure plate (206) is fixedly connected to the half-bottom cover (201) by the cooperation of screws and nuts.
3. The apparatus of claim 1, wherein: The aluminum alloy bottom cover (2) is provided with a bottom sealing gasket (14) at the connection between it and the transparent PC barrel (1).
4. The apparatus of claim 1, wherein: The top cover (4) is provided with an end cap sealing gasket (15) at the connection between it and the transparent PC barrel (1).
5. The apparatus of claim 1, wherein: A stirring fan (16) is installed on one side of the top cover (4).