CN209460227U - A kind of device of portable quick measurement plant xylem cavitation measuring instrument degree - Google Patents
A kind of device of portable quick measurement plant xylem cavitation measuring instrument degree Download PDFInfo
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- CN209460227U CN209460227U CN201920013662.0U CN201920013662U CN209460227U CN 209460227 U CN209460227 U CN 209460227U CN 201920013662 U CN201920013662 U CN 201920013662U CN 209460227 U CN209460227 U CN 209460227U
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Abstract
A kind of device of portable quick measurement plant xylem cavitation measuring instrument degree, No. two water storage containers including No.1 water storage container and equipped with sealing cover, it is connected between two water storage containers by interconnecting piece, the A pipeline of filter is provided in the bottom of No.1 water storage container, its outlet end is sealedly connected with tested plant stem section, and the other end of tested plant stem section is connected with glass tube with a scale；The B pipeline of filter is provided in the lower part of No. two water storage containers, B pipeline outlet end is several branch line structures, for being tightly connected multiple tested plant stem sections, the requirement for meeting multiple flushing operations while carrying out, pass through pipeline respectively on No. two water storage container tops and be connected with gas pressurized device and air-extractor, pressure gauge is equipped on the pipeline of connection gas pressurized device.Degasification, flushing and measurement three functions of branch hydraulic conductivity are incorporated into one by the present apparatus, easy to operate, easy to carry, and measurement quickly, is especially suitable for field condition and carries out related assays.
Description
Technical field
The utility model belongs to plant physioecology and forestry field, and in particular to a kind of portable quick measurement plant
The device of xylem cavitation measuring instrument degree.
Background technique
What the hydraulic structure (hydraulic architecture) of plant was mainly studied is that vascular plant internal water is long
The phenomenon that distance transport and mechanism, are the important research directions of plant physiology and field of ecology.Wherein, xylem cavitation measuring instrument
(embolism) it is important one of hydraulic structure characteristic parameter, is referred under the stress conditions such as arid or alternate freezing and thawing, conduit
Or form bubble in tracheid and water column is caused to interrupt, thus the phenomenon that blocking its Water Transportation function.Under arid situation, the flow of water is lower than
When the critical point that cavitation measuring instrument occurs, that is, it can induce xylem and generate the transport that embolism hinders moisture, with the intensification of degree of drought, bolt
Plug constantly diffusion finally can seriously hinder the moisture of xylem to conduct.In addition, to will lead to its right for moisture icing in xylem lumen
The solubility of air declines, and bubble is formed in ice, and tension (negative pressure) restores during ice-out, and biggish bubble has can
It can expand under tension, eventually lead to lumen cavitation measuring instrument.Different plants are deposited in terms of the ability for resisting xylem cavitation measuring instrument
In very big difference, to show different drought resisting and winter resistance.The measurement of plant xylem cavitation measuring instrument degree is in waterpower knot
It is played an important role in structure research, is the maximum hydraulic conductivity for carrying out xylem, the cavitation measuring instrument for resisting arid and freeze thawing induction
The important step of the measurements such as ability, cavitation measuring instrument repair ability.
The assessment of cavitation measuring instrument degree is usually to be obtained by comparing initial and maximum hydraulic conductivity, and maximum hydraulic conductivity is usual
It is measured after removing the bubble in catheter lumen using douche (flushing).Traditional flusher is to pass through high-pressure nitrogen bottle
Pressure reducing valve obtains the pressure of 0.1-0.2MPa, drives in diaphragm type water tank and the water after bubble removing is gone to flow through plant xylem, from
And intraluminal bubble " flushing " is come out.However, high-pressure nitrogen bottle is heavier inconvenient to carry to field, and deposit in the device
The excessive security risk of pressure.In addition, more difficult cleaning inside diaphragm type water tank, sundries therein often pollutes wood in flushing process
Matter portion leads to the measurement inaccuracy of maximum hydraulic conductivity.
Summary of the invention
The purpose of this utility model is to provide a kind of portable quickly materials such as " flushing " stem section and measure xylem gas
Degasification, flushing and measurement three functions of branch hydraulic conductivity can be incorporated into one, have operation by the device of cave degree, the device
Simply, easy to carry, quick feature is measured, is especially suitable for carrying out related assays under the conditions of field.
The utility model is achieved through the following technical solutions:
A kind of device of portable quick measurement plant xylem cavitation measuring instrument degree, including No.1 water storage container and be equipped with it is close
No. two water storage containers of capping are realized detachably between No.1 water storage container and the bottom of No. two water storage containers by interconnecting piece
Mode is connected, and is provided with the A pipeline of filter in the bottom of No.1 water storage container, the outlet end of A pipeline be sealedly connected with by
The other end of measuring plants stem section, the tested plant stem section is connected with glass tube with a scale；In the lower part of No. two water storage containers
It is provided with the B pipeline of filter, B pipeline outlet end is several branch line structures, multiple by measuring plants for being tightly connected
Stem section, the requirement for meeting multiple flushing operations while carrying out, passes through pipeline on No. two water storage container tops respectively and is connected with gas
Pressurizing device and air-extractor are equipped with pressure gauge on the pipeline of connection gas pressurized device.
Further, the aperture of filter screen of the filter is 0.2 μm.
Further, the gas pressurized device is air pump or manual gas pressurizing device.
Further, the air-extractor is electric vacuum pump or manual extraction tools.
Further, at each pipeline (including A pipeline, B pipeline, the pipeline being connected with gas pressurized device and air-extractor)
On be additionally provided with female Luer, to facilitate pipeline to be connected with valve.Further, between each pipeline and pipeline and each component it
Between connection, moreover it is possible to be attached using three-way cock, to reach the convenience connected or disconnected.
The utility model has the beneficial effects that
Utility model device can rapidly measure the degree that cavitation measuring instrument occurs for plant xylem, and can be by degasification, punching
It washes and is incorporated into one with measurement three functions of branch hydraulic conductivity, easy to operate, quickly, instant company, disassembly is simple, carries for measurement
It is convenient, convenient for being used in the limited situation of field experiment condition, overcome conventional apparatus it is inconvenient to carry, using there are potential peaces
The deficiency of full hidden danger etc..
In addition to this, it by the way that two water storage containers are arranged, in the case where three functions are incorporated into one, and can will make
It removes gas-liquid, flushing operation and hydraulic conductivity and measures separately independent operation, improve convenience.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
In figure, (1) No.1 water storage container, (2) No. two water storage containers, (3) pressure gauge, (4) gas pressurized device, (5) are taken out
Gas equipment, (6) B pipeline, (7) filter, (8) are tested plant stem section, (9) glass tube with a scale, (10) valve, (11) A pipe
Line, (12) interconnecting piece, (13) sealing cover.
Specific embodiment
The utility model is described further with reference to the accompanying drawing.
As shown in Figure 1, a kind of device of portable quick measurement plant xylem cavitation measuring instrument degree, the No.1 including opening
Water storage container 1 and No. two water storage containers 2 equipped with sealing cover 13, between No.1 water storage container and the bottom of No. two water storage containers
Realize that removably is connected by interconnecting piece 12, being provided with aperture of filter screen in the bottom of No.1 water storage container 1 is 0.2 μm of mistake
The A pipeline 11 of filter 7, the outlet end of A pipeline 11 are sealedly connected with tested plant stem section 8, the tested plant stem section it is another
End is connected with glass tube 9 with a scale；It is provided with the B pipeline 6 of filter 7 in the lower part of No. two water storage containers, B pipeline 6 goes out
Mouth end is three branch line structures, for being tightly connected multiple tested plant stem sections 8, meeting multiple flushing operations while carrying out
Requirement, pass through pipeline respectively on No. two 2 tops of water storage container and be connected with manual gas pressurizing device 4 and for the electronic of pumping
Vacuum pump or manual exhauster 5 are equipped with pressure gauge 3, relative to using height on the pipeline of connection manual gas pressurizing device 4
The homogeneous system for pressing nitrogen pressurization, is had the characteristics that safe, small in size, light-weight using manual gas pressurizing device 4.
When measurement, the pipeline being only connected between air-extractor and No. two water storage container tops, with electric vacuum pump or manually
Air extractor is evacuated container, to reach the mesh that removing is dissolved in gas in flushing liquor (while for solution of measurement hydraulic conductivity)
, with flushing plant stem section or to carry out hydraulic conductivity measurement in next step and preparing deaerated solution.
It is rinsed operation later, closes exhaust pipe, opens pressurization and flushing pipeline, i.e., is pressurizeed and is filled by manual gas
It sets 4 and is forced into 0.1MPa-0.2MPa for No. two water storage containers, dozens of minutes are kept as needed, so that the water in container is along B
Pipeline 6 is followed by filter 7 and tested plant stem section 8, until being completely exhausted out the bubble in stem section, using 0.2 μm
Filter 7 can remove the impurity in water.
Hydraulic conductivity is finally measured, the plant stem section for having eliminated bubble is removed from B pipeline 6, one end is connected to A
On pipeline 11, one end connects glass tube 9 with a scale by silica gel hose；Later, No.1 water storage container and No. two water storages are opened
Valve 10 between container makes the water in No. two water storage containers flow into No.1 water storage container, after reaching the water-column of needs,
Valve is closed, No.1 water storage container and the component being attached thereto are isolated with other each components, then starts to measure water guide
Rate, in the process, the solution in No.1 water storage container flow through filter 7 and tested plant under hydrostatic pressing (water column) active force
Object stem section 8 finally enters glass tube 9, record certain volume liquid flow through axis section needed for the time, complete plant water guide
The measurement of rate (needs then to calculate the wooden of the stem section according to formula with the hydraulic conductivity that measures stem section after flushing respectively before flushing
Portion's cavitation measuring instrument degree).
Wherein, hydraulic conductivity (Kh) be unit barometric gradient under solution flow velocity, formula K can be passed throughh=Jv/ (Δ P/ Δ L) into
Row calculates, and Jv is flow velocity (kg s of the solution by stem section-1), Δ P/ Δ L is barometric gradient (MPa m-1).Before flushing and rush
K is measured after washing respectivelyh-native(natural hydraulic conductivity) and Kh-max(maximum hydraulic conductivity) then calculates xylem air pocket by formula
Change degree (hydraulic conductivity forfeiture percentage), hydraulic conductivity lose percentage=100 (Kh-max-Kh-native)/Kh-max。
Claims (6)
1. a kind of device of portable quick measurement plant xylem cavitation measuring instrument degree, which is characterized in that hold including No.1 water storage
Device (1) and No. two water storage containers (2) for being equipped with sealing cover (13), at the bottom of No.1 water storage container (1) and No. two water storage containers (2)
It realizes that removably is connected by interconnecting piece (12) between portion, is provided with filter in the bottom of No.1 water storage container (1)
(7) A pipeline (11), the outlet end of A pipeline (11) are sealedly connected with tested plant stem section (8), the tested plant stem section (8)
The other end be connected with glass tube with a scale (9)；The B pipeline of filter (7) is provided in the lower part of No. two water storage containers
(6), B pipeline (6) outlet end is that several branch line structures meet multiple for being tightly connected multiple tested plant stem sections (8)
The requirement that operation carries out simultaneously is rinsed, passes through pipeline respectively on No. two water storage container (2) tops and is connected with gas pressurized device (4)
With air-extractor (5), pressure gauge (3) are equipped on the pipeline of connection gas pressurized device (4).
2. the device of portable quick measurement plant xylem cavitation measuring instrument degree as described in claim 1, which is characterized in that institute
The aperture of filter screen for stating filter (7) is 0.2 μm.
3. the device of portable quick measurement plant xylem cavitation measuring instrument degree as described in claim 1, which is characterized in that institute
Stating gas pressurized device (4) is air pump or manual gas pressurizing device.
4. the device of portable quick measurement plant xylem cavitation measuring instrument degree as described in claim 1, which is characterized in that institute
Stating air-extractor (5) is electric vacuum pump or manual extraction tools.
5. the device of portable quick measurement plant xylem cavitation measuring instrument degree as described in claim 1, which is characterized in that
It is additionally provided with female Luer on each pipeline, to facilitate pipeline to be connected with valve.
6. the device of portable quick measurement plant xylem cavitation measuring instrument degree as described in claim 1, which is characterized in that each
Connection between pipeline and between pipeline and each component, moreover it is possible to be attached using three-way cock, be connected or disconnected with reaching
Convenience.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920013662.0U CN209460227U (en) | 2019-01-04 | 2019-01-04 | A kind of device of portable quick measurement plant xylem cavitation measuring instrument degree |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920013662.0U CN209460227U (en) | 2019-01-04 | 2019-01-04 | A kind of device of portable quick measurement plant xylem cavitation measuring instrument degree |
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| CN209460227U true CN209460227U (en) | 2019-10-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203655A (en) * | 2021-05-24 | 2021-08-03 | 昆明理工大学 | Measuring equipment for measuring anti-embolism degree of plant xylem by using pneumatic method |
-
2019
- 2019-01-04 CN CN201920013662.0U patent/CN209460227U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203655A (en) * | 2021-05-24 | 2021-08-03 | 昆明理工大学 | Measuring equipment for measuring anti-embolism degree of plant xylem by using pneumatic method |
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