CN101622944A - Closed box system for determining whole tree gas exchange - Google Patents
Closed box system for determining whole tree gas exchange Download PDFInfo
- Publication number
- CN101622944A CN101622944A CN200810012275A CN200810012275A CN101622944A CN 101622944 A CN101622944 A CN 101622944A CN 200810012275 A CN200810012275 A CN 200810012275A CN 200810012275 A CN200810012275 A CN 200810012275A CN 101622944 A CN101622944 A CN 101622944A
- Authority
- CN
- China
- Prior art keywords
- gas exchange
- casing
- whole tree
- gas
- closed box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Investigating Or Analysing Biological Materials (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to plant-atmosphere gas exchange determination technology, in particular to a closed box system for determining whole tree gas exchange, which solves the problems that the prior art has no mature observation system with reliable use, simple and convenient operation and commercialization directly applied to single plant level (whole tree) gas exchange observation and the like. The system comprises lifting equipment, a box body, a base and a gas analyzer, wherein the box body used for closing determined tree is connected with the lifting equipment and arranged on the base; a sensor of the gas analyzer is arranged in the box body; and the gas analyzer adopts Li-6400 portable photosynthetic apparatus of American LICOR Company, and during determination, the sensor (containing IRGA) needs to be sealed in the box body. The system can realize simultaneous observation of gas concentration of CO2 and H2O of the whole tree, automatically acquire and store data, and automatically monitor air temperature of the box body, relative air humidity, photosynthetic active radiation, atmospheric pressure and other environment factors, and is favorable for research and application of tree gas exchange.
Description
Technical field
The present invention relates to the plant-atmosphere gas exchange determination techniques, be specially a kind of closed box system of measuring the whole tree gas exchange, it be can the whole tree gas exchange closed box system.
Background technology
Since the industrial revolution, because the reinforcement of mankind's activity, resource-hungry social development pattern begins undesirable extention, has caused the rapid variation of terrestrial climate system and terrestrial ecosystem process.Make CO in the atmosphere comprising burning owing to fossil fuel
2The concentration of isothermal chamber gas constantly rises, and causes the exchange of carbon cycle and carbon to be interfered, and natural carbon balance is upset.The irrational utilization that also has soil covering variation and water resource is to the strong influence of terrestrial ecosystem water circulation.The interaction of above problem has aggravated serial global environment problem, and mankind itself's existence and sustainable development of social economy have been brought huge threat.And the gas exchange between forest and atmosphere is the main biochemical pathway of global carbon water circulation, and this also makes the research of this aspect play an important role in global change research due.
At present, mainly concentrate on for the gas exchange observational study between forest and atmosphere: utilize portable photosynthetic instrument to the gas exchange observation of organizing level (single leaf, pin bunch, root system or trunk etc.), utilize gas exchange observation and other the application of microclimate method such as indirect methods such as stable isotope technology, aeronautical technologies to ecosystem level.Shang Weiyou uses reliable, easy and simple to handle, commercial ripe observation system to directly apply to the observation of individual plant level (being whole tree) gas exchange.
Summary of the invention
The purpose of this invention is to provide a kind of economical and practical, applied widely, closed box system of transforming mensuration whole tree gas exchange convenient and simple to operate, solve in the prior art and do not use reliable, easy and simple to handle, commercial ripe observation system to directly apply to problems such as individual plant level (being whole tree) gas exchange observation, fill up the blank of whole tree gas exchange observation system.
Technical scheme of the present invention is as follows:
A kind of closed box system of measuring the whole tree gas exchange, this system comprises jacking equipment, casing, base and gas analyzer, the casing that is used for airtight tested trees is connected with jacking equipment, and casing is arranged on the base, and the sensor of gas analyzer is arranged in the casing.
The closed box system of described mensuration whole tree gas exchange, jacking equipment is a nose suspension type, above tested trees, build a crossbeam, pulley is installed at the crossbeam middle part, and the crossbeam height is 2-3 a times of box height, settles the rope twist device of control casing lifting on the ground, rope one end connect box, the rope other end connects the twist device through the pulley at crossbeam middle part.
The closed box system of described mensuration whole tree gas exchange, casing adopt steel weldering system framework, and the framework surface is covered with transparent polyethylene film and wrapped up in into case, covers when wrapping up in dual face seals glue film to be bonded on the framework.
The closed box system of described mensuration whole tree gas exchange is installed gas mixing fan at box house.
The closed box system of described mensuration whole tree gas exchange, base comprises base plate and draw-in groove, and draw-in groove is installed on the base plate, seals with fluid sealant, and box sealing is placed on the draw-in groove.
The closed box system of described mensuration whole tree gas exchange drills through the circular hole that allows tested trees trunk to pass through at the base plate center, the base plate strip channel that makes things convenient for trunk to enter to the outer cutting along the aperture of this circular hole.
The closed box system of described mensuration whole tree gas exchange at the face that base plate is subject to shade, drills through and is used for the circular hole that air inlet pipe, infrared spectrum analyser cable, leaf chamber cable, reference cell wireway and sample room wireway pass through, as cable passage.
The closed box system of described mensuration whole tree gas exchange, gas analyzer adopts portable photosynthetic instrument, the control of portable photosynthetic instrument and operating desk partly are arranged at outside the casing, the sensor of portable photosynthetic instrument is sealed in the casing, and the control of portable photosynthetic instrument links to each other by cable with the sensor of portable photosynthetic instrument with the operating desk part.
The invention has the beneficial effects as follows:
1, among the present invention, jacking equipment is a nose suspension type, and the affiliated facility of static housing also has been installed on the suspension bracket; Casing is used for airtight tested trees, and gas mixing fan has been installed in inside; Base is made up of base plate and draw-in groove two parts, and draw-in groove is used for seal case; Adopt the present invention, by the gas analyzer on the portable photosynthetic instrument sensor to box house CO
2And H
2The monitoring of O gas concentration can realize whole tree CO
2And H
2Observation can directly reflect the whole tree air exchange property that is enclosed in box house in the time of the O gas concentration.In addition, if the base plate of this system is removed, directly draw-in groove is embedded in ground and it is sealed all right soil and the common gas exchange of whole tree directly measured of this system on every side.Therefore, utilization closed box system of the present invention can directly be put in order the gas exchange observational study between strain plant and atmosphere and between soil-plant system and atmosphere.
2, adopt the present invention, can gather and store data automatically, can monitor envirment factors such as casing air themperature, relative air humidity, photosynthetic active radiation and atmospheric pressure automatically, help the research and the application of trees gas exchange.
Description of drawings
Fig. 1 an example of the present invention installation diagram;
Fig. 2 draw-in groove design diagram of the present invention;
Wherein, the control of the portable photosynthetic instrument of A and operating desk part; The sensor of the portable photosynthetic instrument of B (assay determination part IRGA); The tested trees of C;
1 air inlet pipe; 2 cables (comprising air inlet pipe, analyzer and leaf chamber cable, reference cell and sample room wireway, fan electric wire etc.); 3 gas mixing fans; 4 accumulatoies or external power supply; 5 base plate strip channels; 6 casing handles; 7 trunks; 8 circular holes (the trees trunk is by the place); 9 base draw-in groove places; 10 ropes; 11 crossbeams; 12 pulleys; 13 twist devices; 14 base plates; 15 casings; 16 draw-in grooves; 17 draw-in groove peripheries; 18 casing underframes; Enclose in 19 draw-in grooves; 20 cable passages.
Embodiment
As Fig. 1-shown in Figure 2, the closed box system that the present invention measures the whole tree gas exchange mainly contains four parts: jacking equipment, casing, base and gas analyzer, the casing that is used for airtight tested trees is connected with jacking equipment, casing is arranged on the base, and the sensor of gas analyzer is arranged in the casing.Concrete structure is as follows: jacking equipment: be nose suspension type.At first, directly over tested trees C, along the east-west crossbeam 11 of building, pulley 12 is installed at crossbeam 11 middle parts.Crossbeam 11 highly is 2-3 a times of casing 15 height, and length can be advisable with casing 15 in loose lifting.Then, settle the twist device 13 of a sets of cords 10 on the ground, with the lifting of control casing 15.Rope 10 1 end connect boxes 15, the pulley 12 through the crossbeam middle part connects twist device 13 again.When the needs casing is airtight, just casing 15 is put down; After mensuration is finished, can rise casing by twist device 13.In order to prevent that under the strong wind situation casing 15 that rises to eminence waves, can also install and fix the affiliated facility of casing 15 on the suspension bracket.
Casing: for hardness and the intensity that guarantees casing 15, and at utmost reduce frame structure to the blocking of light in the case, adopting cross section is 1.5 * 1.5cm steel weldering system framework.Casing 15 sizes are made with the tree crown size design of tested trees C.The framework surface is covered with transparent polyethylene film and is wrapped up in into case, covers when wrapping up in dual face seals glue film to be bonded on the framework.Because the proportion of many gases is greater than air, in order to prevent that the gas sedimentation from causing local gas concentration difference in the case, and reduce the evaluated error that this phenomenon causes, the gas mixing fan 3 of four 12V has been installed in the box house diagonal positions, gas mixing fan 3 is connected with accumulator or external power supply casing 4 by cable, casing 15 is connected with air inlet pipe 1, and casing handle 6 is installed on the casing 15.
Base: cabinet base is made up of base plate 14 and draw-in groove 16 two parts and (is seen Fig. 1-Fig. 2), draw-in groove 16 is installed at base draw-in groove place 9, draw-in groove 16 surrounds for the draw-in groove peripheral 17 that is positioned at the outside encloses 19 with the draw-in groove that is positioned at the inboard, base plate 14 and draw-in groove 16 usefulness bolts seal with fluid sealant after installing together again.Base plate 14 sizes and shape are set with casing 15 cross sections, generally than casing 15 bottom length and width extension 15-20cm.Drill through a circular opening (circular hole 8) at base plate 14 centers, pass through with the trunk 7 that allows tested trees C.Circular hole 8 apertures are according to trunk 7 diameter adjustment.Enter (see figure 2) to outer base plate strip channel 5 of cutting to make things convenient for trunk 7 along this aperture, on the north that base plate 14 is subject to shade, drill through five circular holes (the about 8mm of diameter) as cable passage 20, be used for air inlet pipe, infrared spectrum analyser cable, leaf chamber cable, reference cell wireway and sample room wireway and pass through.Substructure height is designed to live about the low 3cm of branch than trees first.The purpose of design of draw-in groove 16 is to make things convenient for oil storage with airtight casing 15 when measuring, and material is plastic-aluminum or plastic-steel, this material waterproof and to CO
2Influence is little.Draw-in groove 16 size strictnesses are according to casing 15 cross section sizes, and the degree of depth of draw-in groove 16 and width are being advisable by the loose framework of putting into casing underframe 18, and the draw-in groove degree of depth of this example and width all are 3cm.
Gas analyzer: gas analyzer adopts the portable photosynthetic instrument of Li-6400 of U.S. LICOR company, the control of portable photosynthetic instrument and operating desk part A are arranged at outside the casing 15, sensor (assay determination part IRGA with portable photosynthetic instrument, Infrared Gas Analyzers infrared ray gas analyzer) B is sealed in the casing 15, to measure the gas concentration situation of change in the casing 15, can also measure the variation of envirment factors such as light in the casing 15, temperature simultaneously.The control of portable photosynthetic instrument links to each other by cable 2 with the sensor B of portable photosynthetic instrument with the operating desk part A.
This system is placed in casing 15 inside with the sensor B and the air inlet of portable photosynthetic instrument, and under the driving of the inner air pump of gas analyzer, gas constantly circulates in the mensuration system, thereby has constituted a dynamic closed loop.
After system's installation and debugging are intact, begin the gas exchange of tested trees C is observed.Closed box system operation of the present invention is easier, concludes each observation cycle and mainly contains four operating process:
(1) casing 15 landing;
(2) gas analysis instrument starts observation, and automatic data collection;
(3) minute finishes, and gas analysis instrument is closed;
(4) casing 15 rises.
After measure finishing, the gas exchange rate of tested trees C is calculated, computing formula is as follows:
In the formula, F is expressed as gas exchange rate (the μ molm of tested trees C unit interval unit leaf area
-2S
-1), ρ is the atmospheric density (molm under the temperature inside the box
-3),
Rate of change (the μ molmol of the gas concentration of surveying in the interior case of expression observation time Δ t (s)
-1S
-1), the data fitting that this rate of change is measured by the portable photosynthetic instrument of Li-6400 obtains.V
ChamberEffective volume (m for casing
3), promptly the casing volume is removed shared volumes such as tree crown, tracheae, cable, fan and analyzer.A
CanopyLeaf area (m for whole trees canopy
2).Wherein,
P is an atmospheric pressure (KPa) in the case in the formula, and this value can be measured by the additional sensor on the portable photosynthetic instrument of Li-6400 and obtain.R is an ideal gas constant (8.314 * 10
-3m
3KPamol
-1K
-1).T
ChamberBe gas temperature in the case (K) that this temperature can also can be measured by the additional sensor on the portable photosynthetic instrument of Li-6400 and obtain.
Claims (8)
1, a kind of closed box system of measuring the whole tree gas exchange, it is characterized in that: this system comprises jacking equipment, casing, base and gas analyzer, the casing that is used for airtight tested trees is connected with jacking equipment, casing is arranged on the base, and the sensor of gas analyzer is arranged in the casing.
2, according to the closed box system of the described mensuration whole tree of claim 1 gas exchange, it is characterized in that: jacking equipment is a nose suspension type, above tested trees, build a crossbeam, pulley is installed at the crossbeam middle part, and the crossbeam height is 2-3 a times of box height, settles the rope twist device of control casing lifting on the ground, rope one end connect box, the rope other end connects the twist device through the pulley at crossbeam middle part.
3, according to the closed box system of the described mensuration whole tree of claim 1 gas exchange, it is characterized in that: casing adopts steel weldering system framework, the framework surface is covered with transparent polyethylene film and is wrapped up in into case, covers when wrapping up in dual face seals glue film to be bonded on the framework.
4, according to the closed box system of the described mensuration whole tree of claim 3 gas exchange, it is characterized in that: gas mixing fan is installed at box house.
5, according to the closed box system of the described mensuration whole tree of claim 1 gas exchange, it is characterized in that: base comprises base plate and draw-in groove, and draw-in groove is installed on the base plate, seals with fluid sealant, and box sealing is placed on the draw-in groove.
6, according to the closed box system of the described mensuration whole tree of claim 5 gas exchange, it is characterized in that: drill through the circular hole that allows tested trees trunk to pass through at the base plate center, the base plate strip channel that makes things convenient for trunk to enter to the outer cutting along the aperture of this circular hole.
7, according to the closed box system of the described mensuration whole tree of claim 5 gas exchange, it is characterized in that: the face that is subject to shade at base plate, drill through and be used for the circular hole that air inlet pipe, infrared spectrum analyser cable, leaf chamber cable, reference cell wireway and sample room wireway pass through, as cable passage.
8, according to the closed box system of the described mensuration whole tree of claim 1 gas exchange, it is characterized in that: gas analyzer adopts portable photosynthetic instrument, the control of portable photosynthetic instrument and operating desk partly are arranged at outside the casing, the sensor of portable photosynthetic instrument is sealed in the casing, and the control of portable photosynthetic instrument links to each other by cable with the sensor of portable photosynthetic instrument with the operating desk part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810012275A CN101622944A (en) | 2008-07-11 | 2008-07-11 | Closed box system for determining whole tree gas exchange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810012275A CN101622944A (en) | 2008-07-11 | 2008-07-11 | Closed box system for determining whole tree gas exchange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101622944A true CN101622944A (en) | 2010-01-13 |
Family
ID=41519057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810012275A Pending CN101622944A (en) | 2008-07-11 | 2008-07-11 | Closed box system for determining whole tree gas exchange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101622944A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675247A (en) * | 2013-12-16 | 2014-03-26 | 贵州省亚热带作物研究所 | Whole tissue culture seedling photosynthetic rate rapid determining device and method |
| CN106370790A (en) * | 2016-10-24 | 2017-02-01 | 中国水利水电科学研究院 | CO2 flux automatic monitoring system of farmland ecosystem |
-
2008
- 2008-07-11 CN CN200810012275A patent/CN101622944A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675247A (en) * | 2013-12-16 | 2014-03-26 | 贵州省亚热带作物研究所 | Whole tissue culture seedling photosynthetic rate rapid determining device and method |
| CN106370790A (en) * | 2016-10-24 | 2017-02-01 | 中国水利水电科学研究院 | CO2 flux automatic monitoring system of farmland ecosystem |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101622945A (en) | Open box system for determining whole tree gas exchange | |
| CN201935831U (en) | Layered sampler for underground water | |
| CN201803929U (en) | Water surface greenhouse gas discharge measuring flotation tank | |
| Frey et al. | Atmospheric nitrogen oxides (NO and NO 2) at Dome C, East Antarctica, during the OPALE campaign | |
| CN1987421B (en) | Method and device for in-site detecting soil carbon dioxide flux | |
| CN202033357U (en) | Root system CO2 in-situ automatic measuring device | |
| CN102053145A (en) | In-situ automatic measurement method of CO2 of root system | |
| CN106405055B (en) | A kind of continuous on-line determination soil CO2The system and method for flux | |
| CN201429595Y (en) | Air chamber for measuring grassland CO* flux | |
| CN109655587B (en) | System for on-line measuring local irrigation soil greenhouse gas | |
| CN101622944A (en) | Closed box system for determining whole tree gas exchange | |
| CN202676691U (en) | Portable dissolved methane content detection device | |
| CN108008439A (en) | A kind of nuclear power plant's water body radiation monitoring system | |
| CN110895275A (en) | Device and method for measuring soil respiration and water migration by simulating temperature rise rainfall | |
| CN112129596A (en) | High altitude atmosphere steam gathers and isotope analytical equipment based on unmanned aerial vehicle | |
| CN205506826U (en) | Normal position monitoring devices of forest soil environmental factor carbon dioxide flux and volatility ammonia | |
| CN107238734A (en) | A kind of reliability testing system board protector | |
| CN111060362A (en) | Multilayer soil gas sampler and sampling method | |
| CN103529079A (en) | Moisture test system and test method thereof | |
| CN205786302U (en) | A kind of system of portable soil respiration measurement | |
| CN113758773B (en) | Deep soil heavy metal content monitor and monitoring method thereof | |
| CN103033487B (en) | Device for detecting gas humidity with infrared light | |
| CN201724895U (en) | Ambient air quality inspection box | |
| CN108776200A (en) | A kind of device measuring branch and root breath | |
| CN201393425Y (en) | Photosynthetic rate measuring device for entire plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100113 |