CN106951651A - A kind of method for studying soil moisture to larch trunk diameter growth effect - Google Patents
A kind of method for studying soil moisture to larch trunk diameter growth effect Download PDFInfo
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- CN106951651A CN106951651A CN201710196761.2A CN201710196761A CN106951651A CN 106951651 A CN106951651 A CN 106951651A CN 201710196761 A CN201710196761 A CN 201710196761A CN 106951651 A CN106951651 A CN 106951651A
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- larch
- soil moisture
- trunk
- trunk diameter
- growth effect
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/12—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
Abstract
The invention discloses a kind of method for studying soil moisture to larch trunk diameter growth effect, described method is included to larch sampling, soil moisture measurement, the measurement of larch trunk diameter and data dependence analysis, described larch sampling includes the pretreatment to sample, reduce the interference of external environment and the loss of larch transepidermal water, in addition, the measurement of soil moisture and larch trunk diameter is more accurate in real time, and reliable theoretical foundation is provided for data dependence analysis.The method of the present invention is simple to operate, clear thinking, can be widely used for the plantation research of larch forest, for improving larchen survival rate and promoting larch arboreal growth significant.
Description
Technical field
It is specifically that one kind studies soil moisture to larch trunk diameter the invention belongs to ecological environment research field
The method of growth effect.
Background technology
Larch is the deciduous tree of Pinaceae Larch, and it is the seeds in cool temperature zone and temperate zone, light strong positive plantation,
Strong adaptability, solid to soil moisture and nutrient wide adaptation range, its timber weight, the resistant to bending intensity of resistance to compression is big, timber work
Skill value is high, is the excellent material for electric pole, sleeper, building etc., can also make arabogalactan, with powerful warp
Ji benefit.
China establishing in large scale larch, it is one of important forest composition seeds, is distributed widely in Northeast China, interior
The areas such as Mongolia.Due to climate warming in recent years, arid, the frequency intensity of flood are being strengthened, particularly in northeast, North China, west
Backlands area so that the moisture content change of soil is larger, because the moisture of soil directly affects the physical property of soil,
The activity of the dissolving, transfer and microorganism of nutrient in soil is govern, even more direct relation larchen metabolism, growth.Cause
This, the relation of research, understanding soil water content, therefore research Larch Growth and soil moisture content has important theoretical meaning
Justice and practical value, on the one hand determine the critical value of its drought-enduring moisture-proof, on the other hand can grasp its growth rhythm, for improving
Larchen survival rate and the increase in standing timber are significant.
Traditional method is being that research month average rainfall and larch trunk diameter slightly change, according to closing between the two
System carry out picture analysis, the method can only rough estimate its influence variation relation, it is impossible to its correlation is specifically probed into, for reality
Now probe into soil moisture and the particularly relevant property of larch trunk diameter, it is proposed that a kind of research soil moisture of the invention is to falling
The method of leaf pine trunk growth in thickness influence, can real-time monitor soil moisture content transformation and larch stem diameter changes, profit
Correlation analysis is carried out with equation of linear regression, fallen leaves pine trunk can be promoted by irrigation modulation soil moisture by the method
The growth of diameter.
The content of the invention
Present invention solves the technical problem that there is provided a kind of research soil moisture to larch trunk diameter growth effect
Method, can in real time, accurately measure soil moisture, larch trunk diameter, phase is carried out by unary linear regression equation
The analysis of closing property.
Technical scheme is as follows：
A kind of method for studying soil moisture to larch trunk diameter growth effect, it is characterised in that including following step
Suddenly：
(1) in larch forest, selection is grown fine, age of tree 12-15, the trunk diameter 8- at away from ground 1-1.5m
10cm larch forest zone, sets 30m × 30m sample, to sample ground pre-process, to randomly select 5 larches be
Research object, takes 1m × 1m subquadrats respectively centered on described larch, selected 5 larches is marked, and 5 are fallen
Exfoliating Scrub processing is carried out at trunks of the Ye Song away from ground 0.9-1.1m；
(2) punched in the subquadrat of 5 1m × 1m selected by step (1), soil moisture sensor is put into bottom hole
Portion, fills and leads up, described soil moisture sensor is drawn by Pt-Ir electrodes while carrying out burial with the soil device to hole dug out when punching
Line is connected with external microcomputer, and described microcomputer is handled the data that soil moisture sensor is measured, turned
Change, and be stored in Excel；
(3) measurement larch trunk diameter measurement apparatus is fixed on 5 fallen leaves pine trunk Exfoliating Scrubs selected by step (1)
Place, measures stem diameter changes, and described larch trunk diameter measurement apparatus includes chromium foil strain transducer and information collection
Into processor,；
(4) the larch trunk diameter growth that the soil water content for monitoring step (2) is monitored with step (3) becomes
Change is corresponding, utilizes SPSS softwares, carries out correlation analysis.
Further, the pre-treatment step described in step (1) is：Remove stone, deadwood and shrub larger on ground etc.
Debris；Manually weed out the rank grass, and spray glyphosate herbicidal；Ground is dug, depth about 30cm is dug, then uses spade
Smooth and compacting is carried out, effectively avoids ground injustice from causing ponding, interference measurement results.
Further, the Exfoliating Scrub processing method described in step (1) is：Trunk top layer dead skin is entered with multi-functional ring broach
The whole circle of row strikes off, and strikes off width for 8-12cm, strikes off depth until exposing green inner bark, then coated more in interior bark surface
Mixture, air-dries 2-2.5h, the infection of extraneous bacterium can be avoided, while preventing larch Inner moisture loss.
Further, the drilling method described in step (2) is：Centered on larch, one is determined by radius of 0.5m
Circumference, the optional position chosen on circumference is drilling point, is punched with Portable miniature soil puncher, if in drill process
Hard thing is run into then to stop, and it is other orientation on circumference to change punch position, punches a diameter of 6-8cm, hole depth 0.9-
1.0m。
Further, mainly include electrode, the wet thin slice of sense, the heater strip of the soil moisture sensor described in step (2) are closed
Gold thread, pedestal, described electrode use IrO2-MnO2Material, the wet thin slice of described sense is mainly by MgCr2O4-TiO2Constitute
Ceramic-like loose structure, described heater strip alloy wire uses Aludirome material, outsourcing thickness 0.1-0.2mmAl2O3Ceramics
Protective layer, described pedestal uses Al2O3Ceramic material, described heater strip alloy wire is tightly wound in the wet structure of sense, described
Electrode welding feeling on wet two sides of structure, the wet structure of described sense is fixed on pedestal by lead spot welding terminal；Institute
The MgCr stated2O4-TiO2The preparation method of material is：With MgCr2O4Powder is stock, adds TiO2Metal oxide, matter
Amount is than being 1.5:6-8, gained is burnt through 1100-1300 DEG C of knot, and described ceramic-like loose structure thickness is 200-250um, aperture
In 0.1-0.8um, it is 25-30% containing porosity, the corrosion resistance of sensor can be greatly improved using ceramic component.
Further, the larch trunk diameter measurement apparatus described in step (3) includes chromium foil strain transducer and letter
Integrated processor is ceased, described fixing means is that generatrix direction fixes 4 50mm × 2mm along at fallen leaves pine trunk Exfoliating Scrub
Aluminum alloy flake, thickness is 1mm, and aluminum alloy flake is two-by-two one group and alignment, and two described group aluminum alloy thin slices are in trunk
Circumferencial direction is into 180 °；With fine sandpaper by aluminum alloy flake middle part surface polishing cross waves at 45 °, two reverse side are coated
One layer of even and thin binding agent makes chromium foil strain transducer be bonded in aluminum alloy flake burnishing part, and the bonding direction of sensor is
Horizontal direction, and error is within ± 0.5 °, rolling 2 minutes is then carried out to sensor with hand, in chromium foil after the completion of bonding
The surface of strain transducer applies last layer silicon rubber anti-blushing agent, about 12 hours hardening times.
Further, the information integration processor described in step (3) includes reset circuit, equal arm bridge, dc amplifier
And Date Conversion Unit, described reset circuit is used for the zero of data, is directly used in measurement variable quantity, described data conversion
Voltage is converted to stem diameter changes amount by unit by corresponding formula, and is preserved into Excel.
Further, the correlation analysis described in step (4) uses unary linear regression equation, and concrete operations are：Will
Excel data duplications are into SPSS；Linear regression analysis is selected, setting dependent variable is the trunk diameter that step (3) is monitored, from
Variable is the soil water content that step (2) is monitored；Evaluate Regression Analysis Result.
Further, described correlation analysis uses unary linear regression equation, and principle is：
Assuming that there is linear relationship with soil moisture in larch trunk diameter：
Y=a+bx
Wherein, y represents larch trunk diameter, and x represents soil water content；
The estimate of regression coefficient is obtained by least square method, unary linear regression equation is tried to achieve：
Y=A+Bx
Then significance test is carried out to above-mentioned regression equation using variance analysis, the method for inspection is examined for F, conspicuousness water
Put down as a, whether the regression effect for observing regression equation is notable；Then the significance test of regression coefficient is carried out, the method for inspection is t
Examine, significance is a=0.05, it is determined that each independent variable in significance whether significantly, and carry out independent variable because
The importance ranking of element.
Further, described artificial deciduous forest woods density is in 1400-1800 plants/hm2, average yearly rainfall 450-
500mm。
The beneficial effects of the invention are as follows being sampled by sample, the measurement of soil moisture measurement, larch trunk diameter, correlation
Analyze to probe into soil moisture to larch trunk diameter growth effect；Wherein, to the pretreatment in sample larch sample soil,
Reduce the error that external environment is caused；Sensor for measuring moisture uses ceramic component, substantially increases sensing
The corrosion resistance of device and the accuracy of gathered data, while also improving transfer speed of data；Larch trunk diameter measurement side
Method is simple, sensitivity is high, low cost；Can Larch Growth research offer scientific basis using the result of correlation analysis.This hair
Bright method is clear, and process is simple, and the plantation available for larch forest is studied, be conducive to improving larchen survival rate and
Promote larch arboreal growth.
Specific embodiment
, below will be in the embodiment of the present invention to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer
Technical scheme be clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
For ease of the understanding to the embodiment of the present invention, explanation is further explained by taking specific embodiment as an example below, it is real
Apply example and do not constitute restriction to the embodiment of the present invention.
A kind of method for studying soil moisture to larch trunk diameter growth effect, it is characterised in that including following step
Suddenly：
(1) in Larch Plantation, selection is grown fine, age of tree 12-15, the trunk diameter at away from ground 1.2m
10cm larch forest zone, sets 30m × 30m sample, to sample ground pre-process, to randomly select 5 larches be
Research object, takes 1m × 1m subquadrats respectively centered on described larch, selected 5 larches is marked, and 5 are fallen
Exfoliating Scrub processing is carried out at trunks of the Ye Song away from ground 0.9m；
(2) punched in the subquadrat of 5 1m × 1m selected by step (1), soil moisture sensor is put into bottom hole
Portion, fills and leads up, described soil moisture sensor is drawn by Pt-Ir electrodes while carrying out burial with the soil device to hole dug out when punching
Line is connected with external microcomputer, and described microcomputer is handled the data that soil moisture sensor is measured, turned
Change, and be stored in Excel；
(3) measurement larch trunk diameter measurement apparatus is fixed on 5 fallen leaves pine trunk Exfoliating Scrubs selected by step (1)
Place, measures stem diameter changes, and described larch trunk diameter measurement apparatus includes chromium foil strain transducer and information collection
Into processor,；
(4) the larch trunk diameter growth that the soil water content for monitoring step (2) is monitored with step (3) becomes
Change is corresponding, utilizes SPSS softwares, carries out correlation analysis.
The present invention is further described for influence with reference to Liu Pan Shan north side soil water content to larch trunk diameter, right
2. 3. 4. 5. 1. sample is numbered, and on experimental period from June 1 to July 31, June 1 measured five groups of sample trunk diameters, and opened
Dynamic reset circuit is zeroed, and carries out extracting data once every 8 days, the date for extracting data is respectively June 8, June 16
Number, June 24, July 4, July 12, July 20, July 28, extraction time is the morning 10:00.
Wherein, the pre-treatment step described in step (1) is：Remove the debris such as stone, deadwood and shrub larger on ground；
Manually weed out the rank grass, and spray glyphosate herbicidal；Ground is dug, depth about 30cm is dug, is then carried out with spade
Smooth and compacting.Exfoliating Scrub processing method described in step (1) is：Whole circle is carried out to trunk top layer dead skin with multi-functional ring broach
Strike off, strike off width for 8cm, strike off depth until exposing green inner bark, then coat consolidant in interior bark surface, air-dry
2h.Drilling method described in step (2) is：Centered on larch, a circumference is determined by radius of 0.5m, is chosen on circumference
Optional position be drilling point, punched, stopped if hard thing is run into drill process with Portable miniature soil puncher,
And it is other orientation on circumference to change punch position, punches a diameter of 6cm, hole depth 1.0m.Fixation side described in step (3)
Method is the aluminum alloy flake that generatrix direction fixes 4 50mm × 2mm along at fallen leaves pine trunk Exfoliating Scrub, and thickness is 1mm, and aluminium is closed
Golden thin slice is one group and alignment two-by-two, described two group aluminum alloy thin slices trunk circumferencial direction into 180 °；Will with fine sandpaper
Aluminum alloy flake middle part surface polishing cross waves at 45 °, two reverse side are applied into the even and thin binding agents of last layer makes nickel chromium triangle
Foil strain sensor is bonded in aluminum alloy flake burnishing part, and the bonding direction of sensor is horizontal direction, and error is at ± 0.5 °
Within, rolling 2 minutes is then carried out to sensor with hand, last layer is applied on the surface of chromium foil strain transducer after the completion of bonding
Silicon rubber anti-blushing agent, about 12 hours hardening times.Information integration processor described in step (3) includes equal arm bridge, direct current and put
Big device and Date Conversion Unit, voltage is converted to trunk diameter by described Date Conversion Unit by corresponding formula, and is protected
Deposit into Excel.Correlation analysis described in step (4) uses unary linear regression equation, and concrete operations are：By Excel numbers
According to being copied in SPSS；Linear regression analysis is selected, setting dependent variable is the trunk diameter that step (3) is monitored, independent variable is
The soil water content that step (2) is monitored；Evaluate Regression Analysis Result.Described artificial deciduous forest woods density 1536 plants/
hm2, average yearly rainfall 482mm, June average rainfall 522mm, July average rainfall 586mm.
The soil water content (%) that table 1 is monitored is：
The larch stem diameter changes amount (um) that table 2 is monitored is:
| ① | ② | ③ | ④ | ⑤ | |
| June 8 | 7.2 | 7.6 | 7.2 | 6.9 | 8.0 |
| June 16 | 6.8 | 7.6 | 7.2 | 7.0 | 7.4 |
| June 24 | 7.9 | 8.4 | 8.3 | 7.8 | 8.3 |
| July 4 | 9.7 | 10.4 | 10.0 | 9.6 | 10.6 |
| July 12 | 9.7 | 10.5 | 10.3 | 10.0 | 10.9 |
| July 20 | 9.5 | 10.2 | 9.9 | 10.0 | 11.8 |
| July 28 | 10.2 | 10.5 | 10.2 | 10.2 | 11.9 |
Data in above table are it is recognised that larch stem diameter changes amplitude is with the improve of soil water content
And increase, in actual larchen plantation, irrigation that can be appropriate, to promote Larch Growth.
It should be noted last that, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although ginseng
The present invention is described in detail according to preferred embodiment, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent, without departing from the spirit and scope of technical solution of the present invention.
Claims (8)
1. a kind of method for studying soil moisture to larch trunk diameter growth effect, it is characterised in that comprise the following steps：
(1) in larch forest, age of tree 12-15 or so, the trunk diameter 8-10cm fallen leaves at away from ground 1-1.5m are chosen
Pine forest area, sets 20m × 20m sample, to sample ground pre-process, it is research object to randomly select 5 larches, with
1m × 1m subquadrats are taken centered on described larch respectively, selected 5 larches are marked, and to 5 larches away from ground
Exfoliating Scrub processing is carried out at 0.9-1.1m trunk；
(2) punched in the subquadrat of 5 1m × 1m selected by step (1), soil moisture sensor is put into bottom hole portion, together
When carries out burial with the soil device to hole dug out during punching and fills and leads up, described soil moisture sensor by Pt-Ir contact conductors and
External microcomputer is connected, and described microcomputer is handled the data that soil moisture sensor is measured, changed, and
It is stored in Excel；
(3) measurement larch trunk diameter measurement apparatus is fixed on selected by step (1) at 5 fallen leaves pine trunk Exfoliating Scrubs, survey
Stem diameter changes are measured, described larch trunk diameter measurement apparatus includes chromium foil strain transducer and information integration is handled
Device；
(4) the larch trunk diameter growth change phase that the soil water content for monitoring step (2) is monitored with step (3)
Correspondence, using SPSS softwares, carries out correlation analysis.
2. a kind of research soil moisture as claimed in claim 1 is to the method for larch trunk diameter growth effect, its feature
It is that the pre-treatment step described in step (1) is：Remove the debris such as stone, deadwood and shrub larger on ground；Manually pull out
Weeds, and spray glyphosate herbicidal；Ground is dug, depth about 30cm is dug, smooth and pressure is then carried out with spade
It is real.
3. a kind of research soil moisture as claimed in claim 1 is to the method for larch trunk diameter growth effect, its feature
It is that the Exfoliating Scrub processing method described in step (1) is：Whole circle is carried out to trunk top layer dead skin with multi-functional ring broach to strike off,
Width is struck off for 8-12cm, depth is struck off until exposing green inner bark, then coats consolidant in interior bark surface, 2- is air-dried
2.5h。
4. a kind of research soil moisture as claimed in claim 1 is to the method for larch trunk diameter growth effect, its feature
It is that the drilling method described in step (2) is：Centered on larch, a circumference is determined by radius of 0.5m, circumference is chosen
On optional position be drilling point, punched, stopped if hard thing is run into drill process with Portable miniature soil puncher
Only, and to change punch position be other orientation on circumference, a diameter of 6-8cm, hole depth 0.9-1.0m are punched.
5. a kind of research soil moisture as claimed in claim 1 is to the method for larch trunk diameter growth effect, its feature
It is that the fixing means described in step (3) is that generatrix direction fixes 4 50mm × 2mm along at fallen leaves pine trunk Exfoliating Scrub
Aluminum alloy flake, thickness is 1mm, and aluminum alloy flake is two-by-two one group and alignment, and two described group aluminum alloy thin slices are in trunk
Circumferencial direction is into 180 °；With fine sandpaper by aluminum alloy flake middle part surface polishing cross waves at 45 °, two reverse side are coated
One layer of even and thin binding agent makes chromium foil strain transducer be bonded in aluminum alloy flake burnishing part, and the bonding direction of sensor is
Horizontal direction, and error is within ± 0.5 °, rolling 2 minutes is then carried out to sensor with hand, in chromium foil after the completion of bonding
The surface of strain transducer applies last layer silicon rubber anti-blushing agent, 12 hours hardening times.
6. a kind of research soil moisture as claimed in claim 1 is to the method for larch trunk diameter growth effect, its feature
It is that the information integration processor described in step (3) includes reset circuit, equal arm bridge, dc amplifier and data conversion list
Voltage is converted to trunk diameter by member, described Date Conversion Unit by corresponding formula, and is preserved into Excel.
7. a kind of research soil moisture as claimed in claim 1 is to the method for larch trunk diameter growth effect, its feature
It is that the correlation analysis described in step (4) uses unary linear regression equation, and concrete operations are：By Excel data duplications extremely
In SPSS, linear regression analysis is selected, setting dependent variable is the trunk diameter that step (3) is monitored, independent variable is supervised for step (2)
The soil water content measured, evaluates Regression Analysis Result.
8. a kind of research soil moisture as claimed in claim 1 is to the method for larch trunk diameter growth effect, its feature
It is that described artificial deciduous forest woods density is in 1400-1800 plants/hm2, average yearly rainfall 450-500mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956900A (en) * | 2018-09-06 | 2018-12-07 | 河南科技大学 | A kind of detection method of field crops root tissue water status content |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469240A (en) * | 2016-09-06 | 2017-03-01 | 西北农林科技大学 | Rape leaf SPAD estimation based on spectral index and estimation models construction method |
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2017
- 2017-03-29 CN CN201710196761.2A patent/CN106951651A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469240A (en) * | 2016-09-06 | 2017-03-01 | 西北农林科技大学 | Rape leaf SPAD estimation based on spectral index and estimation models construction method |
Non-Patent Citations (1)
| Title |
|---|
| 管伟: "《六盘山北坡叠叠沟小流域华北落叶松生长及水分影响研究》", 《中国博士学位论文全文数据库 农业科技辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108956900A (en) * | 2018-09-06 | 2018-12-07 | 河南科技大学 | A kind of detection method of field crops root tissue water status content |
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Application publication date: 20170714 |