CN109632686B - Closed layered soil carbon dioxide flux measuring device and method - Google Patents
Closed layered soil carbon dioxide flux measuring device and method Download PDFInfo
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- CN109632686B CN109632686B CN201910066808.2A CN201910066808A CN109632686B CN 109632686 B CN109632686 B CN 109632686B CN 201910066808 A CN201910066808 A CN 201910066808A CN 109632686 B CN109632686 B CN 109632686B
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- 239000002689 soil Substances 0.000 title claims abstract description 67
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 230000004907 flux Effects 0.000 title claims abstract description 39
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 38
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 42
- 238000005070 sampling Methods 0.000 claims description 29
- 238000004364 calculation method Methods 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 20
- 239000007787 solid Substances 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 238000004458 analytical method Methods 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 4
- 238000000691 measurement method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 229940079593 drug Drugs 0.000 claims description 2
- 239000003814 drug Substances 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000011148 porous material Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940124645 emergency medicine Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000004158 soil respiration Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2294—Sampling soil gases or the like
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- Soil Sciences (AREA)
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- Molecular Biology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to the technical field of carbon dioxide flux measurement, in particular to a device and a method for measuring the carbon dioxide flux of closed layered soil, and relates to a device used in the method. The invention carries out measurement along with the variation in space and time, so that the measured data result is more comprehensive, the contrast result is more vivid, and the soil carbon dioxide flux of a certain area can be accurately reflected.
Description
Technical Field
The invention relates to the technical field of carbon dioxide flux measurement, in particular to a closed layered soil carbon dioxide flux measurement device and method.
Background
Soil carbon dioxide is one of main gas components of soil air, soil carbon dioxide flux is used as an important measurement index of greenhouse gas exchange quantity of a land and an atmospheric interface, physical, chemical and biological properties of soil and conditions of land utilization, underground mineral resources, karst and the like of human are reflected, soil carbon storage quantity is very large and is 2 times of atmospheric carbon and 3 times of land plants, soil carbon flux is 10 times of the sum of petroleum fuel and harvested forest resources, the proportion of soil respiration in the whole ecological respiration is very large, meanwhile, the soil carbon flux has very uncertainty and variation in space and time, and the sampling process in the existing measuring technology and method is single and unrepresentative, and the soil carbon dioxide flux of a certain area cannot be accurately reflected.
Disclosure of Invention
The invention aims to solve the problems that the sampling process is single and unrepresentative, the soil carbon dioxide flux of a certain area cannot be accurately reflected and the like in the prior art, and provides a closed layered soil carbon dioxide flux measuring device and method.
In order to achieve the purpose, the invention adopts the following technical scheme: a closed layered soil carbon dioxide flux measuring device comprises a sampling rod and a closed sampler, wherein the sampling rod comprises a solid cylindrical rod, rubber sleeves are sleeved on the left side and the right side of the solid cylindrical rod, a vertical rod is welded at the center of the bottom end of the solid cylindrical rod, the vertical rod and the solid cylindrical rod are in a vertical state, scale marks are machined on the outer wall of the vertical rod from top to bottom, a barrel is installed at the bottom end of the vertical rod, a handle rod is inserted into the inner cavity of the closed sampler, one end of the handle rod extends out of the top end of the closed sampler, the other end of the handle rod extends out of the bottom end of the closed sampler and is connected with a sealing plug, scales are arranged on the outer wall of a connecting rod connecting the handle rod and the sealing plug, the outer wall of the connecting rod is used for observing the depth of the sealing plug, the material of the handle, play can be sealed with the fine contact of soil cylinder surface wall, the left and right sides of closed sampler is pegged graft respectively and is had outlet duct and intake pipe, and both sides have two air current logical doors around the closed sampler, control and outside air communicate with each other or isolated, the equal screwed connection in bottom left and right sides of closed sampler has the one end of steel nail, and two the other end of steel nail inserts the soil horizon, and the steel nail plays the effect of fixed closed sampler.
A closed layered soil carbon dioxide flux measurement method is characterized by comprising the following steps:
s1, setting measuring time;
s2, selecting a measurement address;
s3, planning personnel and preparing a measuring tool;
s4, non-random layered sampling;
s5, measuring sample data;
s6, calculating and analyzing according to the measured data;
s7, sorting the data calculation and analysis results;
and S8, summarizing.
Preferably, the measurement address in S2 is divided into five terrains, namely, plateau, mountain, plain, hill and basin, and each of the terrains is divided into three areas, namely, high, middle and low areas according to the vegetation coverage.
Preferably, the personnel planning in S3 specifically includes dividing the personnel into a plurality of groups, selecting group leader groups, allocating 1 medical personnel to each group, allocating emergency medicine to each group, allocating a satellite phone to each group member, making an emergency contact person, recording the location and contact information of the nearest hospital in the measurement area, so as to prevent accidents, and making a return date and a transportation means.
Preferably, the non-random stratified sampling step in S4 is to drill a hole with a depth of not less than 1 meter into the underground soil layer of the measuring area through the sampling rod, and take out and discard the soil sample.
Preferably, the step S5 is to drill a hole with a depth of not less than 200cm into the underground soil layer of the measurement area through the sampling rod, connect the air outlet pipe and the air inlet pipe with the infrared analyzer, insert the sealing plug into the hole, open the switch of the instrument, and measure the initial CO of the soil layer of 0-20cm when the reading of the instrument is stable2Concentration value, record X10Closing the air vent door and recording the measured value X after two minutes11，(X11-X10) Is CO of the first measuring point2Concentration variation, and data of the soil measured by the infrared analyzer and recorded, wherein the data comprises the volume V (m) of soil pores3) Hole depth H (m), hole wall surface area S (m)2) Observation time interval Δ t (h), sampling time, and sampling area.
Preferably, the calculation and analysis in S6 is specifically to introduce the measurement data result into a soil carbon dioxide flux calculation formula for calculation, where the calculation formula is soil CO2Flux F (mg/m)2h)＝K×△X×(V+πR2X H)/2 pi R X H X delta T, V is the volume of the sealed sampler, R is the radius of the bottom end of the sampling rod, K is the conversion coefficient of 1.8(25 ℃, 101.325KPa), and delta X is the difference of carbon dioxide concentration before and after observation, an air door on the instrument is opened, the sealing plug is quickly moved downwardsWhen the reading of the observation instrument is stable, if the observation instrument is moved to the position of 40cm, the reading X is recorded20Namely the soil CO of the second measuring point2Initial concentration value, then closing the air door, reading X after 2 minutes21，(X21-X20) Namely the soil CO of the second measuring point2The concentration variation can be calculated to obtain 0-40cm CO2Measuring flux every 20cm to obtain a measuring point with a depth of 200cm, repeating the above steps for 2 times, and measuring the CO with the same depth2Average value of flux as CO at that depth2Flux value, which is an average of 3 values as the flux value for that depth, improves the measurement accuracy, one measure takes the measurement time, and the initial CO is measured 1 minute after opening the air circulation gate2Concentration value, CO measurement 2 minutes after closing the air vent door2The concentration change value, therefore, the measurement of one measuring point needs 3 minutes, 1 hole with the depth of 200cm, if the measuring point is measured for 3 times at intervals of 20cm, the measurement time of one complete hole is 90 minutes, and then the instrument is moved to the next hole for measurement, so that the working efficiency is higher, and the measurement precision and the accuracy of the calculation result are also improved.
Preferably, the step S7 of sorting the data calculation and analysis results includes recording the carbon dioxide flux of the soil in the same area, at different times and at different depths into a group, and making a pattern from each group of recorded data for comparison.
Preferably, the step of summarizing in S8 includes summarizing the data calculation and analysis results and summarizing the workload and the work efficiency of the measuring staff.
The invention has the beneficial effects that:
according to the invention, areas of different terrains are continuously sampled for a long time along with the time, then soil layers with different depths, different vegetation coverage rates and different underground animal distribution rates are selected for comparative analysis, and measurement is carried out along with the variation in space and time, so that the measured data result is more comprehensive, the comparative result is more vivid and representative, the soil carbon dioxide flux of a certain area can be accurately reflected, the carbon dioxide release amount from soil to atmosphere is predicted, the carbon dioxide storage amount of soil with a certain depth is estimated, the flux of carbon dioxide with different depths of soil is observed, and continuous cycle measurement can be carried out without waiting. The working efficiency can be improved, the calculation precision of the flux can be greatly improved by measuring the average value for many times, the depth is measured until the excavation depth of the sampling rod is reached, and meanwhile, the accuracy of the measurement result is improved and the cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a closed sampler according to the present invention;
FIG. 2 is a schematic view of a sampling rod according to the present invention.
In the figure: 1. solid cylinder pole, 2, rubber sleeve, 3, steel nail, 4, montant, 5, barrel, 6, closed sampler, 7, handle pole, 8, sealing plug, 9, outlet duct, 10, intake pipe, 11, soil horizon, 12, air circulation door.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
A closed layered soil carbon dioxide flux measuring device comprises a sampling rod and a closed sampler 6, wherein the sampling rod comprises a solid cylindrical rod 1, rubber sleeves 2 are sleeved on the left side and the right side of the solid cylindrical rod 1, a vertical rod 4 is welded at the bottom center of the solid cylindrical rod 1, the vertical rod 4 and the solid cylindrical rod 1 are in a vertical state, scale marks are processed on the outer wall of the vertical rod 4 from top to bottom, a barrel body 5 is installed at the bottom end of the vertical rod 4, a handle rod 7 is inserted into an inner cavity of the closed sampler 6, one end of the handle rod 7 extends out of the top end of the closed sampler 6, the other end of the handle rod 7 extends out of the bottom end of the closed sampler 6 and is connected with a sealing plug 8, the outer wall of a connecting rod connecting the handle rod 7 and the sealing plug 8 is provided with scales for observing the depth of the sealing plug 8, and the material of, the sealing plug 8 is used for isolating air in the closed sampler 6 from air below, so that the air can be well contacted and sealed with the surface wall of the soil cylinder, the left side and the right side of the closed sampler 6 are respectively provided with an air outlet pipe 9 and an air inlet pipe 10 in an inserting mode, the front side and the rear side of the closed sampler are provided with two air circulation doors 12, the left side and the right side of the bottom end of the closed sampler 6 are respectively provided with one end of a steel nail 3 in a screw connection mode, the other end of the steel nail 3 is inserted into the soil layer 11, and the steel nail 3 is used for fixing the closed sampler 6.
A closed layered soil carbon dioxide flux measurement method is characterized by comprising the following steps:
s1, setting measuring time;
s2, selecting a measuring address, wherein the measuring address is divided into five terrains of plateau, mountain land, plain, hilly land and basin, and each terrain is divided into three areas of high, middle and low according to the vegetation coverage rate;
s3, planning personnel and preparing a measuring tool; the personnel planning method comprises the specific steps of dividing personnel into a plurality of groups, selecting group lengths of all groups, allocating 1 medical personnel and emergency drugs to each group, allocating a satellite telephone to each group member, formulating emergency contact persons, recording the position and contact way of a nearest hospital in a measuring area, preventing accidents and formulating return dates and traffic ways.
S4, non-random layered sampling; the random layered sampling comprises the specific steps of drilling a hole with the depth of not less than 1 meter to the underground soil layer of the measuring area through a sampling rod, and taking out and discarding a soil sample.
S5, measuring sample data, namely drilling a hole with the depth of not less than 200cm into the underground soil layer of the measurement area through a sampling rod, respectively connecting an air outlet pipe and an air inlet pipe with an infrared analyzer, inserting a sealing plug into the hole, opening an instrument switch, and measuring initial CO of the initial 0-20cm soil layer when the reading of the instrument is stable2Concentration value, record X10The air flow through door 12 is closed and after two minutes the measured value X is recorded11，(X11-X10) Is CO of the first measuring point2Concentration variation, and data of the soil measured by the infrared analyzer and recorded, wherein the data comprises the volume V (m) of soil pores3) Hole depth H (m), hole wall surface area S (m)2) Observation time interval Δ t (h), sampling time, and sampling area.
S6, calculating and analyzing according to the measured data; specifically, the measured data result is led into a soil carbon dioxide flux calculation formula for calculation, wherein the calculation formula is soil CO2Flux F (mg/m)2h)＝K×△X×(V+πR2X H)/2 pi R X H X T, V is the volume of the sealed sampler, R is the radius of the bottom end of the sampling rod, K is the conversion coefficient of 1.8(25 ℃, 101.325KPa), and delta X is the difference of carbon dioxide concentration before and after observation, an air circulation door 12 on the side surface of the instrument is opened, the sealing plug 8 is rapidly moved downwards, if the sealing plug is moved to 40cm, and when the reading of the instrument is observed to be stable, the reading X is recorded20Namely the initial CO of the soil layer of the second measuring point2Concentration value, then air vent door 12 closed, reading X after 2 minutes21，(X21-X20) Namely CO in the soil layer of the second measuring point2The concentration variation can be further calculated to obtain 0-40cm soil CO2Measuring flux every 20cm by analogy, measuring depth of 200cm, repeating the above steps for 2 times, and measuring the soil CO with the same depth2Average value of flux as soil CO at that depth2The flux value, which is the average of the 3-degree values, is used as the flux value of the depth, so that the measurement accuracy is improved. Measuring time for one measuring point, measuring initial CO after opening air circulation door 12 minutes2Concentration value, CO measurement 2 minutes after closing the air vent door2The concentration change value, therefore, the measurement of one measuring point needs 3 minutes, 1 hole with the depth of 200cm, if the measuring point is measured for 3 times at intervals of 20cm, the measurement time of one complete hole is 90 minutes, and then the instrument is moved to the next hole for measurement, so that the working efficiency is higher, and the measurement precision and the accuracy of the calculation result are also improved.
S7, sorting the data calculation and analysis results; specifically, the carbon dioxide flux of soil in the same area, at different time and at different depths is recorded together into a group, and each group of recorded data is made into a pattern for comparison.
And S8, summarizing, wherein the data calculation and analysis results are summarized, and the workload and the work efficiency of the measuring staff are summarized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The utility model provides a closed layering soil carbon dioxide flux measuring device, a serial communication port, including thief rod and closed sampler (6), the thief rod includes solid cylinder pole (1), rubber sleeve (2) have all been cup jointed to the left and right sides of solid cylinder pole (1), the bottom central point of solid cylinder pole (1) puts the welding and has montant (4), and montant (4) and solid cylinder pole (1) are in the vertical state, the outer wall of montant (4) has the scale mark from last to all processing down, barrel (5) are installed to the bottom of montant (4), there are two air current through doors (12) both sides around closed sampler (6), the inner chamber of closed sampler (6) is pegged graft and is had handle bar (7), the top of closed sampler (6) is extended to the one end of handle bar (7), and the other end of handle bar (7) is extended the bottom of closed sampler (6) and is linked to each other with sealing plug (8) continuous The scale has been seted up with the connecting rod outer wall of sealing plug (8) to connection handle pole (7) for survey the degree of depth of sealing plug (8), the material of sealing plug (8) is supported for the rubber material, and the effect of sealing plug (8) is isolated with air in closed sampler (6) and following air phase, plays can be sealed with the fine contact of soil cylinder surface wall, it has outlet duct (9) and intake pipe (10) to peg graft respectively on the left and right sides top of closed sampler (6), the equal screwed connection in bottom left and right sides of closed sampler (6) has the one end of steel nail (3), and two the other end of steel nail (3) inserts soil horizon (11), and steel nail (3) play the effect of fixed closed sampler (6).
2. The measurement method of the closed layered soil carbon dioxide flux measurement device according to claim 1, characterized by comprising the following steps:
s1, setting measuring time;
s2, selecting a measurement address;
s3, planning personnel and preparing a measuring tool;
s4, non-random layered sampling;
s5, measuring sample data;
s6, calculating and analyzing according to the measured data;
s7, sorting the data calculation and analysis results;
and S8, summarizing.
3. The method according to claim 2, wherein the measurement address in S2 is divided into five kinds of landforms, i.e., plateau, mountain, plain, hill, and basin, and each landform is divided into three areas, i.e., high, medium, and low, according to vegetation coverage.
4. The method of claim 2, wherein the step of assigning personnel at S3 comprises dividing the personnel into groups, selecting group leader groups, assigning 1 medical staff member to each group, assigning emergency treatment drugs, assigning a satellite phone to each group, making emergency contact, recording the location and contact information of the nearest hospital in the measurement area, preventing accidents, and making return date and traffic information.
5. The method for measuring according to claim 2, wherein the step of non-randomly layering for sampling in S4 is drilling a hole with a depth of not less than 200cm into the subsurface soil layer of the measuring area through the sampling rod.
6. The method according to claim 2, wherein the step of measuring the sample data in S5 is to drill a hole with a depth of not less than 200cm into the underground soil layer of the measurement area through the sampling rod, insert the sealing plug (8) into the hole, connect the gas outlet pipe (9) and the gas inlet pipe (10) to the infrared analyzer, open the switch of the analyzer, and measure the initial CO of the soil layer with a depth of 0-20cm2Concentration value, record X10The air flow through door (12) is closed and after two minutes the measured value X is recorded11，(X11-X10) Is CO of the first measuring point2The concentration variation, the data of the wall of the soil hole measured by the infrared analyzer is recorded, and the data comprises the volume V (m) of the soil hole3) Hole depth H (m), hole wall surface area S (m)2) Observation time interval Δ t (h), sampling time, and sampling area.
7. The method according to claim 2, wherein the calculation analysis in S6 is specifically to introduce the measurement data result into a soil carbon dioxide flux calculation formula for calculation, and the calculation formula is soil CO2Flux F (mg/m)2h)＝K×△X×(V+πR2The multiplied by H)/2 pi R multiplied by H multiplied by delta T, V is the volume of the sealed sampler, R is the radius of the bottom end of the sampling rod, K is a conversion coefficient which is 1.8(25 ℃, 101.325KPa), delta X is the difference value of carbon dioxide concentration before and after observation, an air circulation door (12) at the side surface of the sampler is opened, the sealing plug (8) is rapidly moved downwards, for example, the position is moved to 40cm, when the reading of an observation instrument is stable, the reading X is recorded20I.e. the initial CO of the second measuring point2Concentration value, then closing the air vent door (12), reading X after 2 minutes21，(X21-X20) Namely the second measuring point CO2The concentration variation can be calculated to obtain 0-40cm CO2Measuring flux by the same method, measuring the flux by 200cm depth every 20cm, and repeating the above steps for 2 times to obtain CO with the same depth2Average value of flux as CO at that depth2Flux value, which is the average of 3 values as the soil CO at the depth2The flux value improves the measurement precision, the measurement time of one measuring point is 1 minute after the air circulation door is opened, and the initial CO is measured2Concentration value, CO measurement 2 minutes after closing the air vent door2The concentration change value, therefore, the measurement of one measuring point needs 3 minutes, 1 hole with the depth of 200cm, if the measurement is repeated for 3 times every 20cm, the measurement time of one complete hole is 90 minutes, and then the instrument is moved to the next hole for measurement, which has higher valueThe working efficiency of the method also improves the measurement precision and the accuracy of the calculation result.
8. The method according to claim 2, wherein the step of sorting the data calculation and analysis results in step S7 is to record the carbon dioxide flux of the soil in the same area, at different times and at different depths into a group, and to compare the recorded data of each group by making a pattern.
9. The measurement method according to claim 2, wherein the step of summarizing in S8 comprises summarizing the results of data calculation and analysis and summarizing the workload and the work efficiency of measurement personnel.
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| CN114428071A (en) * | 2021-11-30 | 2022-05-03 | 核工业北京地质研究院 | CO in space air and shallow soil2Method for quickly measuring concentration on site |
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| CN101131352A (en) * | 2007-06-04 | 2008-02-27 | 高程达 | In-situ measuring method and device for solum carbon dioxide flux |
| CN101622945A (en) * | 2008-07-11 | 2010-01-13 | 中国科学院沈阳应用生态研究所 | Open box system for determining whole tree gas exchange |
| CN201429595Y (en) * | 2009-01-21 | 2010-03-24 | 福建师范大学 | Air chamber for measuring grassland CO* flux |
| CN108469422A (en) * | 2018-03-13 | 2018-08-31 | 山东科技大学 | A kind of aeration zone CO 2 measuring method |
| CN108692994A (en) * | 2018-04-24 | 2018-10-23 | 中国石油天然气股份有限公司 | A kind of injection gas displacement well site aerated zone soil carbon dioxide flux monitoring device and method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101131352A (en) * | 2007-06-04 | 2008-02-27 | 高程达 | In-situ measuring method and device for solum carbon dioxide flux |
| CN101622945A (en) * | 2008-07-11 | 2010-01-13 | 中国科学院沈阳应用生态研究所 | Open box system for determining whole tree gas exchange |
| CN201429595Y (en) * | 2009-01-21 | 2010-03-24 | 福建师范大学 | Air chamber for measuring grassland CO* flux |
| CN108469422A (en) * | 2018-03-13 | 2018-08-31 | 山东科技大学 | A kind of aeration zone CO 2 measuring method |
| CN108692994A (en) * | 2018-04-24 | 2018-10-23 | 中国石油天然气股份有限公司 | A kind of injection gas displacement well site aerated zone soil carbon dioxide flux monitoring device and method |
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