CN204389333U - A kind of soil water potential analyzer - Google Patents
A kind of soil water potential analyzer Download PDFInfo
- Publication number
- CN204389333U CN204389333U CN201520078117.1U CN201520078117U CN204389333U CN 204389333 U CN204389333 U CN 204389333U CN 201520078117 U CN201520078117 U CN 201520078117U CN 204389333 U CN204389333 U CN 204389333U
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- soil
- tensimeter
- discharge
- connecting pipe
- mercury
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Abstract
The utility model provides a kind of soil water potential analyzer, is made up of fixed head, supporting plate, left discharge, right discharge, mercury ga(u)ge, yellow liquor tensimeter, pot clay end and connecting pipe; The upper end of described left discharge and right discharge is water filling port, and this water filling port rubber stopper seals; Left discharge side is provided with three and connects mouth, and described three are connect mouth and are connected with U-shaped mercury ga(u)ge left arm, yellow liquor tensimeter U-shaped pipe left arm and connecting pipe respectively by flexible plastic tube or glass tube; Right discharge side is provided with two and connects mouth, and described two are connect mouth and are connected with yellow liquor tensimeter U-shaped pipe right arm and connecting pipe respectively by flexible plastic tube or glass tube; Pot clay end is connected with bottom described connecting pipe.The feature that this measurement mechanism not only has that accuracy is high, intuitive display, use are simple, cheap, and directly can measure field WAWQ gesture difference condition, the movement tendency of timely reflect soil moisture, indicates the irrigation in field.
Description
Technical field
The utility model relates to device for measuring moisture, particularly a kind of soil water potential analyzer.
Background technology
Soil moisture is the main source (except hydroponic plant) of plant absorption moisture.The main source of soil moisture is precipitation and irrigation water, participates in the moisture systemic circulation of lithosphere-biosphere-air sphere-hydrosphere.
Moisture is an important component part of natural soil, it not only has influence on the physical property of soil, govern the activity of the dissolving of nutrient in soil, transfer and microorganism, and be the key factor forming soil fertility, one to cut plant the sill condition of depending on for existence especially.
Soil moisture is by the effect of the molecular attraction of the hollow billet gravitation between soil aperture and grogs, and make moisture be in negative pressure (suction) state, suction type Soil Tension is exactly the instrument measuring soil suction.Soil water suction is the intensity index of soil moisture.The size of soil water suction and the mobility of the holard and have close relationship to the validity of plant.
Soil moisture content is the capacity performance index of the holard, has certain relation between the suction size of the holard and soil moisture content, and generally, soil suction is larger, and water cut is less; Soil suction is less, water cut the more, so the reading of suction type Soil Tension can roughly reflect soil moisture content situation.
Understand soil water movement and soil to the water supply capacity of plant, only have the idea of soil moisture quantity to be inadequate.Such as, be 23% to the soil moisture content of clay, the soil moisture content of sand is 17%, two soil sample contacts, how should the holard move? if only consider the idea of soil moisture quantity, seeming soil moisture should flow to sand from clay soil sample, but true on the contrary.Just because of now the soil moisture potential of sand is high, namely the soil water potential of sand is large, makes moisture flow to clay by sand.This absolutely proves, only has the idea of soil moisture quantity, still can not study soil water movement and the water supply to plant very well, must set up the idea of soil moisture potential, be i.e. the concept of soil water potential.
The tensioned meter method of measurement, negative pressure method, centrifuge method, pressure membrane method etc. of soil water potential.Chinese patent " a kind of on-site soil flow of water measuring instrument and using method thereof " (CN201410021728.2) discloses a kind of on-site soil flow of water measuring instrument, comprise base, induction sleeve, outer sleeve, pressure transducer, described base is provided with cavity and the cone end, osculum is offered at the bottom of the cone of described base, described osculum is communicated in cavity, one end of described pressure transducer to stretch in the cavity of base and with described base compact siro spinning technology, described outer sleeve is socketed on described pressure transducer and chassis outer side, base outer perimeter offers groove around described cavity, described base also offers prefabricated permeable hole, described prefabricated permeable hole is communicated with described groove and cavity, described induction jacket casing is connected to described base and is covered in outside this groove.Although this measuring instrument can ensure internal cavity bubble-free, and saturation process is simple, and saturation effect is good, not easily vaporizes; Base arranges the cone end, is conducive to setting of field instrumentation, and can ensures to contact the advantages such as good with the soil body, but measures due to needs pressure transducer, adds cost, is unfavorable for popularization.
In the measuring method of current soil water potential, suction type Soil Tension structure is simple, and do not need to be equipped with pressure transducer, cost is minimum.This instrument directly at field measurement, can indicate irrigation, applies quite extensive.Along with the dark people's research to soil moisture potential, higher to mensuration soil water potential precise requirements, but U-tube formula mercury tensiometer measuring accuracy is thicker at present, general reading accuracy is at 1.0mm mercury column, add the reading error of observation, usually do not reach this precision, have impact on the application of suction type Soil Tension.
Utility model content
The purpose of this utility model is to provide a kind of soil water potential analyzer, it is high that this measurement mechanism not only has accuracy, intuitive display, use simple, cheap feature, and directly can measure field WAWQ gesture difference condition, the movement tendency of timely reflect soil moisture, indicates the irrigation in field.
Mentality of designing of the present utility model is: by mercury ga(u)ge, yellow liquor tensimeter and discharge and overall combination of popping one's head in, the suction difference at different soils place will directly be reflected on mercury ga(u)ge and yellow liquor tensimeter, by calculating, field WAWQ gesture difference condition accurately can be learnt.
The technical solution of the utility model is: a kind of soil water potential analyzer, is characterized in that: be made up of fixed head, supporting plate, left discharge, right discharge, mercury ga(u)ge, yellow liquor tensimeter, pot clay end and connecting pipe; The upper end of described left discharge and right discharge is water filling port, and this water filling port rubber stopper seals; Left discharge side is provided with three and connects mouth, and described three are connect mouth and are connected with U-shaped mercury ga(u)ge left arm, yellow liquor tensimeter U-shaped pipe left arm and connecting pipe respectively by flexible plastic tube or glass tube; Right discharge side is provided with two and connects mouth, and described two are connect mouth and are connected with yellow liquor tensimeter U-shaped pipe right arm and connecting pipe respectively by flexible plastic tube or glass tube; Pot clay end is connected with bottom described connecting pipe.
Further, described left discharge and right discharge are made up of organic glass or glass.
Further, the liquid in described yellow liquor tensimeter is bromoform.
Further, described fixed head there is perforate, by perforate rope or iron wire, mercury ga(u)ge and yellow liquor tensimeter are fixed on fixed head.
The soil suction surveyed of the pot clay end that left discharge is corresponding can with formulae discovery below:
ψ
1＝(h
1+h
2)×13.6-(H+h
1)
In formula:
ψ
1for soil suction (cm water column is high);
H
1for left side mercury slug reading (cm);
H
2for the right mercury slug high scale (cm);
H is the vertical range (cm) of U-shaped pressure gauge zero reading point to the pot clay end central point buried underground.
The soil suction that the pot clay end that right discharge is corresponding is surveyed is with formulae discovery below:
ψ
2＝ψ
1+y(d
y-1)
In formula:
ψ
1by the pot clay end that left discharge is corresponding is surveyed soil suction (cm water column is high);
ψ
2by the pot clay end that right discharge is corresponding is surveyed soil suction (cm water column is high);
Y is yellow liquor post post difference ((cm);
D
yfor yellow liquor proportion.
The beneficial effects of the utility model are:
(1) common suction type mercury tensiometer least count 1mm mercury column, namely least count is 13.6mm water column; This soil water potential analyzer reading is more accurate, and least count is 1.0mm water column, improves degree of accuracy 13.6 times, uses it to measure soil water potential more accurate;
(2) this soil water potential analyzer adopts two point examination, directly can reflect field WAWQ gesture difference condition, judge field soil moisture movement trend;
In sum, it is high that this measurement mechanism not only has accuracy, intuitive display, and use simple, cheap feature, and directly can measure field WAWQ gesture difference condition, the movement tendency of timely reflect soil moisture, indicates the irrigation in field.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model part-structure schematic diagram;
Fig. 3 is the utility model measuring state schematic diagram.
In figure: 1, fixed head; 2, supporting plate; 3, left discharge; 4, right discharge; 5, mercury ga(u)ge; 6, yellow liquor tensimeter; 7, pot clay end; 8, connecting pipe; 9, water filling port; 10, rubber stopper; 11, mouth is connect; 12, perforate.
Embodiment
Embodiment one:
As shown in accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3: a kind of soil water potential analyzer, is characterized in that: be made up of fixed head 1, supporting plate 2, left discharge 3, right discharge 4, mercury ga(u)ge 5, yellow liquor tensimeter 6, pot clay end 7 and connecting pipe 8; Described fixed head 1 there is perforate 12, by perforate 12 iron wire, mercury ga(u)ge 5 and yellow liquor tensimeter 6 is fixed on fixed head 1; Described left discharge 3 and right discharge 4 are made up of organic glass; Liquid in described yellow liquor tensimeter 6 is bromoform, and the upper end of described left discharge 3 and right discharge 4 is water filling ports 9, and this water filling port 9 rubber stopper 10 seals; Left discharge 3 side is provided with three and connects mouth 11, and described three are connect mouth 11 and are connected with U-shaped mercury ga(u)ge 5 left arm, U-shaped yellow liquor tensimeter 6 left arm and connecting pipe 8 respectively by flexible plastic tube or glass tube; Right discharge 4 side is provided with two and connects mouth 11, and described two are connect mouth 11 and are connected with U-shaped pipe yellow liquor tensimeter 6 right arm and connecting pipe 8 respectively by flexible plastic tube or glass tube; Pot clay end 7 is connected with bottom described connecting pipe 8.
The course of work of the present utility model is: pour into mercury to 0 scale in mercury ga(u)ge 5, fills it up with without steam distillation water, and connect a threeway discharge in its left side mercury slug upper tube; Bromoform to 0 scale that proportion is less is poured in yellow liquor tensimeter 6; Inject without steam distillation water to tensiometer from discharge, make all pipelines all be full of without steam distillation water, be then stoppered the stopper on discharge, carry out degassing processing, after degassing processing, pot clay end is soaked in water for subsequent use.For avoiding gas leakage, total interface coats fluid sealant.
Representative place is selected in field, according to the degree of depth measured, be drilled in tensiometer and measure place boring, by the soil at depth of burying place with become mud, in note people boring, soil water potential analyzer is buried in people's boring, ensure pot clay end 7 and soil close contact, two pot clay ends keep same depth, to inject without steam distillation water and after sealing 24h just readable mensuration at soil water potential analyzer.Under field condition, in order to the impact less by temperature, every morning 9:00 measures, and notes bubble in tensiometer pipe to be discharged in discharge during mensuration, and method constantly plays tensiometer junction pipe gently with finger.
In order to compare the mensuration accuracy of the utility model soil water potential analyzer, to measure soil water potential pedestal method---plane type instrument method does reference, relatively soil water potential analyzer and suction type mercury tensiometer measure accuracy and sensitivity, and its measurement result is in table 1.
Table 1 measures the comparison of the different instruments of soil water potential
| Soil moisture content | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| Plane type instrument | -54507 | -49927 | -39976 | -28684 | -17796 | -10864 | -5527 |
| Soil water potential analyzer | -54484 | -48932 | -39963 | -28697 | -17795 | -10855 | -5513 |
| Suction type mercury tensiometer | -53272 | -47815 | -38891 | -27784 | -16681 | -9842 | -4736 |
as can be seen from Table 1, soil water potential analyzer is suction type mercury tensiometer measurement result comparatively, closer to pedestal method plane type instrument method measurement result, illustrates that soil water potential analyzer measurement result is closer to the true field soil flow of water.
Above embodiment of the present utility model has been described in detail, but described content being only preferred embodiment of the present utility model, can not being considered to for limiting practical range of the present utility model.All equalizations done according to the utility model application range change and improve, and all should still belong within patent covering scope of the present utility model.
Claims (4)
1. a soil water potential analyzer, is characterized in that: be made up of fixed head (1), supporting plate (2), left discharge (3), right discharge (4), mercury ga(u)ge (5), yellow liquor tensimeter (6), pot clay end (7) and connecting pipe (8); The upper end of described left discharge (3) and right discharge (4) is water filling port (9), this water filling port (9) rubber stopper (10) sealing; Left discharge (3) side is provided with three and connects mouth (10), and described three are connect mouth (10) and are connected with U-shaped mercury ga(u)ge (5) left arm, yellow liquor tensimeter (6) U-shaped pipe left arm and connecting pipe (8) respectively by flexible plastic tube or glass tube; Right discharge (4) side is provided with two and connects mouth (11), and described two are connect mouth (11) and are connected with yellow liquor tensimeter (6) U-shaped pipe right arm and connecting pipe (8) respectively by flexible plastic tube or glass tube; Described connecting pipe (8) bottom is connected with pot clay end (7).
2. a kind of soil water potential analyzer as claimed in claim 1, is characterized in that: described left discharge (3) and right discharge (4) are made up of organic glass or glass.
3. a kind of soil water potential analyzer as claimed in claim 1, is characterized in that: the liquid in described yellow liquor tensimeter (6) is bromoform.
4. a kind of soil water potential analyzer as claimed in claim 1, it is characterized in that: described fixed head (1) has perforate (12), by perforate (12) rope or iron wire, mercury ga(u)ge (5) and yellow liquor tensimeter (6) are fixed on fixed head (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520078117.1U CN204389333U (en) | 2015-02-04 | 2015-02-04 | A kind of soil water potential analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520078117.1U CN204389333U (en) | 2015-02-04 | 2015-02-04 | A kind of soil water potential analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204389333U true CN204389333U (en) | 2015-06-10 |
Family
ID=53362041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520078117.1U Expired - Fee Related CN204389333U (en) | 2015-02-04 | 2015-02-04 | A kind of soil water potential analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204389333U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872312A (en) * | 2018-04-16 | 2018-11-23 | 河海大学 | A kind of high range soil water potential device and application method that saturation is easy |
-
2015
- 2015-02-04 CN CN201520078117.1U patent/CN204389333U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872312A (en) * | 2018-04-16 | 2018-11-23 | 河海大学 | A kind of high range soil water potential device and application method that saturation is easy |
| CN108872312B (en) * | 2018-04-16 | 2020-08-04 | 河海大学 | Simple and convenient saturated high-range soil water potential device and use method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20150610 Termination date: 20160204 |