CN210108930U - Soil greenhouse gas flux measuring device - Google Patents
Soil greenhouse gas flux measuring device Download PDFInfo
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- CN210108930U CN210108930U CN201920593531.4U CN201920593531U CN210108930U CN 210108930 U CN210108930 U CN 210108930U CN 201920593531 U CN201920593531 U CN 201920593531U CN 210108930 U CN210108930 U CN 210108930U
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- greenhouse gas
- soil
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- gas flux
- box
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Abstract
The utility model discloses a soil greenhouse gas flux measuring device belongs to ecological observation technical field. The device comprises a static tank and a greenhouse gas analyzer, wherein the static tank is connected with the greenhouse gas analyzer through a pipeline to form a loop; wherein, static case includes the column body, establishes soil ring in column body bottom soil ring with be equipped with between the lid case and be used for sealed water seal groove. The utility model discloses simple structure only needs simple operation three-way valve just can realize gaseous measurement and the mixing in the box, and need not to carry gas production bag, gas production bottle or use the syringe, and easy operation is convenient, and is efficient, and is effectual, conveniently carries, but repeatedly usable has simplified the collection and the measurement work of greenhouse gas flux observation time measuring greatly.
Description
Technical Field
The utility model belongs to the technical field of ecological observation, more specifically say, relate to a soil greenhouse gas flux measuring device.
Background
In recent years, global climate and environmental changes caused by greenhouse gas emissions have become a major concern of global society in general, and research on greenhouse gases has been receiving attention.
Classical static box-gas chromatography is widely used in studying greenhouse gas emissions, in particular to measure the flux of trace gas exchange between soil and atmosphere. The method has simple working principle, and comprises covering a special box on the region to be measured, isolating the exchange of gas inside and outside the box, sampling from the box along with the change of time to determine the content of greenhouse gas in the box, and calculating to obtain gas exchange flux. Static chamber-gas chromatography is simple and easy to implement, has great flexibility, and can simultaneously analyze a plurality of components in a gas sample, so that the static chamber-gas chromatography is favored by scientists in recent years. However, the research results show that various factors such as the adsorption of greenhouse gases by the inner wall of the gas collection bag, carbon exchange with the ambient atmosphere or slight air leakage bring certain uncertainty to the analysis result, great errors can be caused by improper manual operation in the sampling process, and the gas collection and gas measurement processes are time-consuming and labor-consuming.
In field observation experiments, laboratory workers often want to acquire data information as accurate as possible with less equipment investment and less sample analysis time. Chinese patent 201220458581, published as 2013, 3 and 6, discloses an amphibious greenhouse gas emission measurement flux box, which is characterized in that two gas sample holes are formed in the upper surface of a measurement box body, the measurement box body is connected with an automatic detection instrument through a measurement pipeline, and a three-way valve is arranged on the measurement pipeline, so that manual detection and automatic detection can be realized on the same box body. However, the patent has the problems that the original structure of the soil is damaged for many times and the sampling point is not fixed when the sampling is carried out for a long time.
SUMMERY OF THE UTILITY MODEL
The purpose of the invention is as follows: to the above-mentioned problem that prior art exists, the utility model aims to provide an efficient and easy and simple to handle measuring device of soil greenhouse gas flux.
The technical scheme is as follows: in order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:
a soil greenhouse gas flux measuring device comprises a static tank and a greenhouse gas analyzer, wherein the static tank and the greenhouse gas analyzer are connected through a pipeline to form a loop; wherein, static case includes the column body, establishes soil ring in column body bottom soil ring with be equipped with between the lid case and be used for sealed water seal groove.
The upper surface of static case is equipped with vent and gas sampling mouth, be equipped with outlet duct and intake pipe on the greenhouse gas analysis appearance, the vent through first pipe with the outlet duct is connected, the gas sampling mouth through the second pipe with intake-tube connection.
And three-way valves are arranged on the first conduit and the second conduit.
The portion of the second conduit extending into the static tank is longer than the portion of the first conduit extending into the static tank.
The greenhouse gas analyzer is a portable infrared gas analyzer.
The diameter of the columnar body is 300 mm.
The soil greenhouse gas flux measuring device further comprises a temperature measuring port for inserting a thermometer, and the temperature measuring port is arranged on the upper surface of the static box.
A method for soil greenhouse gas flux measurement, comprising the steps of:
s1, burying the soil ring in the soil;
s2, placing the static box on the soil ring and sealing with water;
and S3, operating the three-way valve to enable the air passages of the two guide pipes between the static box and the greenhouse gas analyzer to be communicated, opening a switch of the greenhouse gas analyzer, enabling the gas in the static box to enter the greenhouse gas analyzer through the second guide pipe for measurement, and then returning the gas to the cover box through the first guide pipe, thereby realizing the uniform mixing and measurement of the gas in the cover box.
Has the advantages that: compared with the prior art, the utility model discloses a static case comprises soil ring and column body two parts, plays from the soil ring buries in the soil when, accomplishes to whole measurement test, and soil ring only need bury once, during the measurement only need with the column body place soil ring recess in can, just so avoided because of measuring the box and bury the destruction to soil structure that causes in the soil many times, simultaneously, make the sampling point can fix, reduced test error. The device of the utility model is simple in structure, only need simply to operate the three-way valve and just can realize gaseous measurement and the mixing in the box, and need not to carry gas production bag, gas production bottle or use the syringe, easy operation is convenient, and is efficient, and is effectual, conveniently carries, but repeatedly usable has simplified the collection and the measurement work of greenhouse gas flux observation time measuring greatly.
Drawings
Fig. 1 is a schematic structural view of a measuring apparatus.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in figure 1, the soil greenhouse gas flux measuring device of the application mainly comprises a static box 3 and a portable greenhouse gas analyzer 4, wherein the static box 3 is of a columnar box body structure, the material of the columnar box body is polyvinyl chloride (PVC), the diameter of the columnar box body is 300mm, and the height of the columnar box body is 300 mm. The soil ring 1 is arranged at the bottom of the box body, the soil ring 1 is in a circular ring shape, the upper part of the box body is provided with a water seal groove 2 used for sealing, the height of the soil ring 1 is 150mm, the outer diameter is 350mm, and the inner diameter is 250 mm. The upper surface of the box body is provided with a temperature measuring port 9, a ventilation opening 5 and a gas sampling port 6, and the temperature measuring port 9 is used for inserting a thermometer; the diameters of the vent 5 and the gas sampling port 6 are 63.5 mm. Greenhouse gas analysis appearance 4 can be infrared gas analysis appearance, be equipped with outlet duct 7 and intake pipe 8 on greenhouse gas analysis appearance 4, vent 5 is connected with outlet duct 7 through first pipe 10, gas sampling mouth 6 is connected with intake pipe 8 through second pipe 11, thereby form complete return circuit between greenhouse gas analysis appearance 4 and static case 3, all be equipped with the three-way valve on first pipe 10 and second pipe 11, first pipe 10 and second pipe 11 are the polyethylene pipe for the gas sampling.
The portion of the second conduit 11 extending into the static tank 3 is longer than the portion of the first conduit 10 extending into the static tank. Typical lengths may be: the first conduit extends into the static chamber for a length of 60mm and the second conduit extends into the static chamber for a length of 150 mm.
Adopt above-mentioned device to carry out the measurement of south Jing forestry university's soil greenhouse gas flux, south Jing forestry university's soil is the soil of recited soil, lacks the humus layer, and soil is compact, and the level is in disorder, contains a small amount of gravel, and the volume weight of soil 0 ~ 20cm is on the large side, and porosity and air permeability are little, and water stability index and permeability are on the small side. The measurement comprises the following steps:
s1, burying the soil ring 1 in the soil for 10 cm;
s2, placing the static box 3 on the soil ring 1 and sealing with water;
and S3, operating the three-way valve to enable the air passages of the two guide pipes between the cover box and the greenhouse gas analyzer to be communicated, opening the switch of the greenhouse gas analyzer, enabling the gas in the cover box to enter the greenhouse gas analyzer 4 through the second guide pipe 11 for measurement, and then returning the gas to the cover box through the first guide pipe 10, thereby realizing the uniform mixing and measurement of the gas in the cover box.
The results of the measurement (taking 30-second measurement data of methane and carbon dioxide as an example) are shown in table 1.
TABLE 1 measurement results
As can be seen from the table 1, the device of the application is convenient and quick to measure, can continuously and quickly measure and can measure the instantaneous concentration of the required gas.
Claims (7)
1. The soil greenhouse gas flux measuring device is characterized by comprising a static box (3) and a greenhouse gas analyzer (4), wherein the static box (3) is connected with the greenhouse gas analyzer (4) through a pipeline to form a loop; wherein, static case (3) include the column body, establish soil ring (1) in column body bottom soil ring (1) with be equipped with between the column body and be used for sealed water seal groove (2).
2. Soil greenhouse gas flux measuring device of claim 1, characterized in that the upper surface of the static box is provided with a vent (5) and a gas sampling port (6), the greenhouse gas analyzer (4) is provided with an air outlet pipe (7) and an air inlet pipe (8), the vent (5) is connected with the air outlet pipe (7) through a first conduit (10), and the gas sampling port (6) is connected with the air inlet pipe (8) through a second conduit (11).
3. Soil greenhouse gas flux measurement device according to claim 2, characterized in that a three-way valve is provided on both the first (10) and second (11) conduits.
4. Soil greenhouse gas flux measurement device according to claim 2, wherein the part of the second conduit (11) extending into the static tank is longer than the part of the first conduit (10) extending into the static tank.
5. Soil greenhouse gas flux measurement device according to claim 1, characterized in that the greenhouse gas analyzer (4) is a portable infrared gas analyzer.
6. Soil greenhouse gas flux measurement device according to claim 5, wherein the diameter of the cylindrical body is 300 mm.
7. Soil greenhouse gas flux measurement device according to claim 1, further comprising a temperature measuring port (9) for inserting a thermometer, the temperature measuring port (9) being arranged on the upper surface of the static tank (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920593531.4U CN210108930U (en) | 2019-04-26 | 2019-04-26 | Soil greenhouse gas flux measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920593531.4U CN210108930U (en) | 2019-04-26 | 2019-04-26 | Soil greenhouse gas flux measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210108930U true CN210108930U (en) | 2020-02-21 |
Family
ID=69537042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920593531.4U Expired - Fee Related CN210108930U (en) | 2019-04-26 | 2019-04-26 | Soil greenhouse gas flux measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210108930U (en) |
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2019
- 2019-04-26 CN CN201920593531.4U patent/CN210108930U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200221 |