CN106092909A - A kind of detection method of jujube tree canopy chlorophyll content - Google Patents
A kind of detection method of jujube tree canopy chlorophyll content Download PDFInfo
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- CN106092909A CN106092909A CN201610361550.5A CN201610361550A CN106092909A CN 106092909 A CN106092909 A CN 106092909A CN 201610361550 A CN201610361550 A CN 201610361550A CN 106092909 A CN106092909 A CN 106092909A
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- jujube tree
- chlorophyll content
- tree canopy
- canopy
- detection method
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/8466—Investigation of vegetal material, e.g. leaves, plants, fruits
Abstract
The invention discloses the detection method of a kind of jujube tree canopy chlorophyll content, comprise the following steps: select sunny, cloudless or a small amount of cloud layer, the wind-force weather less than 3 grades to gather the hyperspectral information of jujube tree canopy.After high-spectral data is carried out multiplicative scatter correction, use wavelet de-noising and smoothing processing.Extract the 450 of chlorophyll content jujube tree canopy to be determined, 472,486,540,550,556,620,680,705,1403,1935, the spectral reflectance values of 2198nm wavelength；Each spectral reflectance values is substituted into detection model, is calculated the chlorophyll content of jujube tree canopy.The present invention has feature pollution-free, easy and simple to handle, the most accurate, is suitable for popularization and application.
Description
Technical field
The invention belongs to plant cultivation field of engineering technology, relate to the detection method of a kind of chlorophyll content, specifically,
Relate to the detection method of a kind of jujube tree canopy chlorophyll content.
Background technology
Chlorophyll is the requisite nutrient of jujube growth, and quick obtaining chlorophyll information is that monitoring jujube growth is sent out
Educate and the premise of quality guarantee.The detection method of the jujube tree canopy chlorophyll content that prior art is total needs to prepare chemical reagent,
The chemistry tail liquid emissions pollution to environment and the injury to human body during mensuration, and there is complex operation step, during detection
Between long defect.Currently available technology is badly in need of a kind of jujube tree canopy chlorophyll content pollution-free, easy and simple to handle, the most accurate
Detection method.
Summary of the invention
In order to overcome defect present in prior art, the present invention proposes a kind of pollution-free, easy and simple to handle, the most accurate
The detection method of jujube tree canopy chlorophyll content, the method achieve the quick and precisely detection of jujube tree canopy chlorophyll content,
Need not prepare any chemical reagent, it is to avoid the chemistry tail liquid emissions pollution to environment and the wound to human body during measuring
Evil, also greatly simplify operating procedure simultaneously, shortens the detection time, can meet in agricultural production in the large area Fructus Jujubae garden short time
Require to obtain the demand of canopy chlorophyll content data, provide quickly for fertile precisely the using of jujube tree field management Determination of Chlorophyll
Obtain the means of dose foundation.
Its technical scheme is as follows:
The detection method of a kind of jujube tree canopy chlorophyll content, comprises the following steps:
(1) sunny, cloudless or a small amount of cloud layer, the wind-force weather less than 3 grades is selected to gather required mensuration chlorophyll content Fructus Jujubae
The hyperspectral information of crown canopy.
(2), after high-spectral data being carried out multiplicative scatter correction, use wavelet de-noising, then be smoothed.
(3) extract the 450 of chlorophyll content jujube tree canopy to be determined, 472,486,540,550,556,620,680,705,
1403,1935, the spectral reflectance values of 2198nm wavelength.
(4) reflectance value of each wavelength is substituted into jujube tree canopy chlorophyll content detection model:
Y=0.82756-0.877884x1+0.02438614x2-0.1359647x3-0.877884x4+0.02438614x5-
0.1359647x6-11.75032x7-15.07838x8+2.369121x9+2.554476x10+5.827979x11+13.69115x12
Wherein, y is jujube tree canopy chlorophyll content, and unit is mg/g, x1、x2、x3、x4、x5、x6、x7、x8、x9、x10、x11、
x12Be respectively jujube tree canopy wave band 450,472,486,540,550,556,620,680,705,1403,1935,2198nm
Spectral reflectance values.
Preferably, the hyperspectral information collection of the jujube tree canopy described in step (1), during collection probe required vertically to
Under, and canopy center need to be directed at, probe is away from 1 meter of height of canopy.
Preferably, the hyperspectral information collection of the jujube tree canopy described in step (1), its acquisition time is Beijing time
11:00-15:00.
Preferably, described in step (2), smoothing processing method is Savitzky-Golay Smoothing, and smooth window is
7。
Preferably, 450 described in step (4), 472,486,540,550,556,620,680,705,1403,1935,
The spectral reflectance values of 2198nm wavelength, the reflectance of 10 times surveyed by same canopy repetition averagely after and through polynary scattering
Value after correction, wavelet de-noising and smoothing processing.
The invention have the benefit that
Present invention achieves the quick and precisely detection of jujube tree canopy chlorophyll content, it is not necessary to prepare any chemical reagent,
Avoid the chemistry tail liquid emissions pollution to environment and the injury to human body during mensuration, also greatly simplify operation step simultaneously
Suddenly, shorten the detection time, can meet and agricultural production require in the large area Fructus Jujubae garden short time obtain canopy chlorophyll content number
According to demand, provide the means of quick obtaining dose foundation for fertile precisely the using of jujube tree field management Determination of Chlorophyll.Should
Method has feature pollution-free, easy and simple to handle, the most accurate, is suitable for popularization and application.
Accompanying drawing explanation
Fig. 1 is the fitting degree of jujube tree canopy chlorophyll content detected value and actual value.
Detailed description of the invention
With detailed description of the invention, technical scheme is described in more detail below in conjunction with the accompanying drawings.
The detection method of a kind of jujube tree canopy chlorophyll content, comprises the following steps:
(1) measure the hyperspectral information of the jujube tree canopy of chlorophyll content to be detected, select ceiling unlimited or partly cloudy and wind
The power weather less than 3 grades is carried out, and the concrete minute of this example is on August 21st, 2015, and hyperspectral information acquisition time is
Beijing time 13:00-15:00, hyperspectral information acquisition instrument be ASD company of the U.S. produce FieldSpec 4 removably
Object light spectrometer, when hyperspectral information gathers, probe vertical is downward, and distance 1 meter of height of canopy, 10 light of each canopy collection are set a song to music
Line, the meansigma methods of 10 curves is the final reflectance value of this canopy.This example acquires the EO-1 hyperion of 54 jujube tree canopies altogether
Information.
(2) after 54 curves of spectrum gathered being carried out multiplicative scatter correction, wavelet de-noising and smoothing processing.
(3) extract every curve 450,472,486,540,550,556,620,680,705,1403,1935,2198nm ripple
Long spectral reflectance values.
(4) by every curve 450,472,486,540,550,556,620,680,705,1403,1935,2198nm wavelength
Spectral reflectance values substitute into jujube tree canopy chlorophyll content detection model:
Y=0.82756-0.877884x1+0.02438614x2-0.1359647x3-0.877884x4+0.02438614x5-
0.1359647x6-11.75032x7-15.07838x8+2.369121x9+2.554476x10+5.827979x11+13.69115x12
Wherein, y is jujube tree canopy chlorophyll content, and unit is mg/g, x1、x2、x3、x4、x5、x6、x7、x8、x9、x10、x11、
x12Be respectively jujube tree canopy wave band 450,472,486,540,550,556,620,680,705,1403,1935,2198nm
Spectral reflectance values.
(5) table 1 be the jujube tree canopy chlorophyll content utilizing indoor chemical assay to obtain actual value with utilize above-mentioned
The statistical data of the detected value that jujube tree canopy chlorophyll content detection model obtains, as can be seen from Table 1, actual value and detected value
The meansigma methods of the two, maximum, minima are the most close；Fig. 1 is the plan of jujube tree canopy chlorophyll content detected value and actual value
Conjunction degree.The coefficient of determination (R between actual value and detected value2) reaching 0.72, root-mean-square error (RMSE) only has 0.125mg/
G, average relative error (MRE) only 5.93%, standard deviation reaches 1.93 with root-mean-square error ratio (RPD).To sum up, model is described
There is the ability of high-precision forecast.This result shows, the method for the present invention can detect jujube tree canopy chlorophyll accurately and rapidly
Content.
Table 1 jujube tree canopy chlorophyll actual value adds up (n=50) with detected value
The above, the only present invention preferably detailed description of the invention, protection scope of the present invention is not limited to this, any ripe
Know those skilled in the art in the technical scope of present disclosure, the letter of the technical scheme that can become apparent to
Altered or equivalence are replaced and are each fallen within protection scope of the present invention.
Claims (5)
1. the detection method of a jujube tree canopy chlorophyll content, it is characterised in that comprise the following steps:
(1) sunny, cloudless or a small amount of cloud layer, the wind-force weather less than 3 grades is selected to gather required mensuration chlorophyll content jujube tree hat
The hyperspectral information of layer；
(2), after high-spectral data being carried out multiplicative scatter correction, use wavelet de-noising, then be smoothed；
(3) extract the 450 of chlorophyll content jujube tree canopy to be determined, 472,486,540,550,556,620,680,705,
1403,1935, the spectral reflectance values of 2198nm wavelength；
(4) reflectance value of each wavelength is substituted into jujube tree canopy chlorophyll content detection model:
Y=0.82756-0.877884x1+0.02438614x2-0.1359647x3-0.877884x4+0.02438614x5-
0.1359647x6-11.75032x7-15.07838x8+2.369121x9+2.554476x10+5.827979x11+13.69115x12
Wherein, y is jujube tree canopy chlorophyll content, and unit is mg/g, x1、x2、x3、x4、x5、x6、x7、x8、x9、x10、x11、x12Point
Not Wei jujube tree canopy wave band 450,472,486,540,550,556,620,680,705,1403,1935, the spectrum of 2198nm
Reflectance value.
The detection method of jujube tree canopy chlorophyll content the most according to claim 1, it is characterised in that institute in step (1)
The hyperspectral information collection of the jujube tree canopy stated, during collection, probe vertically downward, and must need to be directed at canopy center, and probe is away from hat
1 meter of height of layer.
The detection method of jujube tree canopy chlorophyll content the most according to claim 1, it is characterised in that institute in step (1)
The hyperspectral information collection of the jujube tree canopy stated, its acquisition time is Beijing time 11:00-15:00.
The detection method of jujube tree canopy chlorophyll content the most according to claim 1, it is characterised in that institute in step (2)
Stating smoothing processing method is Savitzky-Golay Smoothing, and smooth window is 7.
The detection method of jujube tree canopy chlorophyll content the most according to claim 1, it is characterised in that institute in step (4)
State 450,472,486,540,550,556,620,680,705,1403,1935, the spectral reflectance values of 2198nm wavelength, for
The reflectance of surveyed 10 times repetitions of same canopy averagely after and after multiplicative scatter correction, wavelet de-noising and smoothing processing
Value.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175783A (en) * | 2019-12-31 | 2020-05-19 | 塔里木大学 | Satellite remote sensing monitoring method for cotton canopy chlorophyll b content |
| CN111175782A (en) * | 2019-12-31 | 2020-05-19 | 塔里木大学 | Satellite remote sensing monitoring method for chlorophyll content of cotton canopy |
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| CN102878957A (en) * | 2012-09-26 | 2013-01-16 | 安徽大学 | Leaf area index and chlorophyll content inversion method based on remote sensing image optimization PROSAIL model parameters |
| CN103226093A (en) * | 2011-07-12 | 2013-07-31 | 精工爱普生株式会社 | Calibration curve creation method, calibration curve creation device and target component determination device |
| CN103983584A (en) * | 2014-05-30 | 2014-08-13 | 中国科学院遥感与数字地球研究所 | Retrieval method and retrieval device of chlorophyll a concentration of inland case II water |
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2016
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| CN103226093A (en) * | 2011-07-12 | 2013-07-31 | 精工爱普生株式会社 | Calibration curve creation method, calibration curve creation device and target component determination device |
| CN102878957A (en) * | 2012-09-26 | 2013-01-16 | 安徽大学 | Leaf area index and chlorophyll content inversion method based on remote sensing image optimization PROSAIL model parameters |
| CN103983584A (en) * | 2014-05-30 | 2014-08-13 | 中国科学院遥感与数字地球研究所 | Retrieval method and retrieval device of chlorophyll a concentration of inland case II water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175783A (en) * | 2019-12-31 | 2020-05-19 | 塔里木大学 | Satellite remote sensing monitoring method for cotton canopy chlorophyll b content |
| CN111175782A (en) * | 2019-12-31 | 2020-05-19 | 塔里木大学 | Satellite remote sensing monitoring method for chlorophyll content of cotton canopy |
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