CN105954207A - Method for detecting content of chlorophyll b in canopy of jujube tree - Google Patents
Method for detecting content of chlorophyll b in canopy of jujube tree Download PDFInfo
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- CN105954207A CN105954207A CN201610361783.5A CN201610361783A CN105954207A CN 105954207 A CN105954207 A CN 105954207A CN 201610361783 A CN201610361783 A CN 201610361783A CN 105954207 A CN105954207 A CN 105954207A
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- G—PHYSICS
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- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
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Abstract
The invention discloses a method for detecting content of chlorophyll b in canopy of jujube tree. The method comprises the following steps of collecting the high spectrum information of the canopy of jujube tree in sunny, cloudless or less-cloud weather with wind force less than 3; performing multiplicative scatter correction on the high spectrum data, and performing wavelet denoising and smoothing; extracting the spectrum reflectance values of the canopy of jujube tree with to-be-measured content of chlorophyll b in the wavelengths of 470nm, 610nm, 645nm, 652nm, 663nm, 985nm and 1160nm; substituting the spectrum reflectance values into a detection model, and calculating, so as to obtain the content of chlorophyll b in the canopy of jujube tree. The method has the characteristics that the pollution is avoided, the operation is simple, convenient, quick and accurate, and the method is suitable for being popularized and applied.
Description
Technical field
The invention belongs to plant cultivation field of engineering technology, relate to the detection method of a kind of content of chlorophyll b, specifically, relate to
And the detection method of a kind of jujube tree canopy content of chlorophyll b.
Background technology
Chlorophyll b is the requisite nutrient of jujube growth, and quick obtaining chlorophyll b information is monitoring growth and development of jujube trees
And the premise of quality guarantee.The detection method of the jujube tree canopy content of chlorophyll b that prior art is total needs to prepare chemical reagent, surveys
The chemistry tail liquid emissions pollution to environment and the injury to human body during Ding, and there is complex operation step, the detection time is long
Defect.Currently available technology is badly in need of pollution-free, easy and simple to handle, the most accurate a kind of jujube tree canopy content of chlorophyll b
Detection method.
Summary of the invention
In order to overcome defect present in prior art, the present invention proposes a kind of Fructus Jujubae pollution-free, easy and simple to handle, the most accurate
The detection method of crown canopy content of chlorophyll b, the method achieves the quick and precisely detection of jujube tree canopy content of chlorophyll b, no
Need to prepare any chemical reagent, it is to avoid the chemistry tail liquid emissions pollution to environment and the injury to human body during measuring, with
Time also greatly simplify operating procedure, shorten the detection time, require to obtain in the large area Fructus Jujubae garden short time can be met in agricultural production
Take the demand of canopy content of chlorophyll b data, provide quick obtaining for fertile precisely the using of jujube tree field management Determination of Chlorophyll b
The means of dose foundation.
Its technical scheme is as follows:
The detection method of a kind of jujube tree canopy content of chlorophyll b, 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 content of chlorophyll b 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 470 of content of chlorophyll b jujube tree canopy to be determined, 610,645,652,663,985,1160nm wavelength
Spectral reflectance values.
(4) reflectance value of each wavelength is substituted into jujube tree canopy content of chlorophyll b detection model:
Y=0.53796-30.89546x1-44.00625x2+506.2439x3-735.3674x4+289.2066x5-4.507388x6+8.1820
25x7
Wherein, y is jujube tree canopy content of chlorophyll b, and unit is mg/g, x1、x2、x3、x4、x5、x6、x7It is respectively Fructus Jujubae
Crown canopy 470,610,645,652,663,985, the reflectance value of 1160nm wave band.
Preferably, the hyperspectral information collection of the jujube tree canopy described in step (1), during collection probe must vertically downward,
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, 470 described in step (4), 610,645,652,663,985, the spectrum of 1160nm wavelength anti-
Radiance rate value, the reflectance of 10 times surveyed by same canopy repetition averagely after and through multiplicative scatter correction, wavelet de-noising peace
Value after sliding process.
The invention have the benefit that
Present invention achieves the quick and precisely detection of jujube tree canopy content of chlorophyll b, it is not necessary to prepare any chemical reagent, it is to avoid
During measuring, the chemistry tail liquid emissions pollution to environment and the injury to human body, also greatly simplify operating procedure simultaneously, contracting
The short detection time, the need requiring to obtain canopy content of chlorophyll b data in agricultural production in the large area Fructus Jujubae garden short time can be met
Ask, provide the means of quick obtaining dose foundation for fertile precisely the using of jujube tree field management Determination of Chlorophyll b.The method has
There is feature pollution-free, easy and simple to handle, the most accurate, be suitable for popularization and application.
Accompanying drawing explanation
Fig. 1 is the fitting degree of jujube tree canopy content of chlorophyll b 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 content of chlorophyll b, comprises the following steps:
(1) measure the hyperspectral information of the jujube tree canopy of content of chlorophyll b to be detected, select ceiling unlimited or partly cloudy and wind-force to be less than
The weather of 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 is the portable atural object of FieldSpec 4 that ASD company of the U.S. produces
Spectrogrph, 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 470,610,645,652,663,985, the spectral reflectance values of 1160nm wavelength.
(4) by every curve 470,610,645,652,663,985, the spectral reflectance values of 1160nm wavelength substitute into jujube tree
Canopy content of chlorophyll b detection model:
Y=0.53796-30.89546x1-44.00625x2+506.2439x3-735.3674x4+289.2066x5-4.507388x6+8.182025x7
Wherein, y is jujube tree canopy content of chlorophyll b, and unit is mg/g, x1、x2、x3、x4、x5、x6、x7It is respectively Fructus Jujubae
Crown canopy 470,610,645,652,663,985, the reflectance value of 1160nm wave band.
(5) table 1 be the jujube tree canopy content of chlorophyll b utilizing indoor chemical assay to obtain actual value with utilize above-mentioned jujube tree
The statistical data of the detected value that canopy content of chlorophyll b detection model obtains, as can be seen from Table 1, actual value and detected value two
The meansigma methods of person, maximum, minima are more close；Fig. 1 is the plan of jujube tree canopy content of chlorophyll b detected value and actual value
Conjunction degree.The coefficient of determination (R between actual value and detected value2) reaching 0.54, root-mean-square error (RMSE) only has 0.124mg/g,
Average relative error (MRE) only 13.04%, standard deviation reaches 1.52 with root-mean-square error ratio (RPD).To sum up, model is described
There is the predictive ability of certain precision.This result shows, the method for the present invention can be with degree of precision, quickly detection jujube tree canopy
Content of chlorophyll b.
The actual value of table 1 jujube tree canopy chlorophyll b 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 is familiar with basis
Those skilled in the art in the technical scope of present disclosure, the simple change of the technical scheme that can become apparent to
Or equivalence replacement each falls within protection scope of the present invention.
Claims (5)
1. the detection method of a jujube tree canopy content of chlorophyll b, 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 content of chlorophyll b 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 470 of content of chlorophyll b jujube tree canopy to be determined, 610,645,652,663,985,1160nm wavelength
Spectral reflectance values；
(4) reflectance value of each wavelength is substituted into jujube tree canopy content of chlorophyll b detection model:
Y=0.53796-30.89546x1-44.00625x2+506.2439x3-735.3674x4+289.2066x5-4.507388x6+8.1820
25x7
Wherein, y is jujube tree canopy content of chlorophyll b, and unit is mg/g, x1、x2、x3、x4、x5、x6、x7It is respectively Fructus Jujubae
Crown canopy 470,610,645,652,663,985, the reflectance value of 1160nm wave band.
The detection method of jujube tree canopy content of chlorophyll b the most according to claim 1, it is characterised in that step (1)
Described in the hyperspectral information collection of jujube tree canopy, during collection, probe vertically downward, and must need to be directed at canopy center, probe
Away from 1 meter of height of canopy.
The detection method of jujube tree canopy content of chlorophyll b the most according to claim 1, it is characterised in that step (1)
Described in the hyperspectral information collection of jujube tree canopy, its acquisition time is Beijing time 11:00-15:00.
The detection method of jujube tree canopy content of chlorophyll b the most according to claim 1, it is characterised in that step (2)
Described in smoothing processing method be Savitzky-Golay Smoothing, smooth window is 7.
The detection method of jujube tree canopy content of chlorophyll b the most according to claim 1, it is characterised in that step (4)
Described in 470,610,645,652,663,985, the spectral reflectance values of 1160nm wavelength, surveyed by same canopy
10 repetitions reflectance averagely after and value after multiplicative scatter correction, wavelet de-noising and smoothing processing.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248627A (en) * | 2016-10-09 | 2016-12-21 | 塔里木大学 | A kind of detection method of the humus content of the soil |
| CN106501454A (en) * | 2016-10-31 | 2017-03-15 | 塔里木大学 | A kind of satellite remote-sensing monitoring method of jujube tree canopy content of chlorophyll b |
| CN107132204A (en) * | 2017-06-08 | 2017-09-05 | 浙江大学 | The measurement apparatus and inversion method of a kind of chlorophyll content in leaf blades |
| CN107219226A (en) * | 2017-07-24 | 2017-09-29 | 中国科学院遥感与数字地球研究所 | Image collecting device and enhancing vegetation index monitoring system |
| CN111175783A (en) * | 2019-12-31 | 2020-05-19 | 塔里木大学 | Satellite remote sensing monitoring method for cotton canopy chlorophyll b content |
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| CN103630499A (en) * | 2013-11-12 | 2014-03-12 | 浙江大学 | Detection method for distribution of fish protein content based on hyper-spectral imaging technology |
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| CN103630499A (en) * | 2013-11-12 | 2014-03-12 | 浙江大学 | Detection method for distribution of fish protein content based on hyper-spectral imaging technology |
| CN103674838A (en) * | 2013-11-12 | 2014-03-26 | 浙江大学 | Hyperspectral imaging technology-based fish fat content distribution detection method |
| CN104483274A (en) * | 2015-01-17 | 2015-04-01 | 华东交通大学 | Device and method for detecting leaf nitrogen concentration of field maize plants |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248627A (en) * | 2016-10-09 | 2016-12-21 | 塔里木大学 | A kind of detection method of the humus content of the soil |
| CN106501454A (en) * | 2016-10-31 | 2017-03-15 | 塔里木大学 | A kind of satellite remote-sensing monitoring method of jujube tree canopy content of chlorophyll b |
| CN107132204A (en) * | 2017-06-08 | 2017-09-05 | 浙江大学 | The measurement apparatus and inversion method of a kind of chlorophyll content in leaf blades |
| CN107219226A (en) * | 2017-07-24 | 2017-09-29 | 中国科学院遥感与数字地球研究所 | Image collecting device and enhancing vegetation index monitoring system |
| CN111175783A (en) * | 2019-12-31 | 2020-05-19 | 塔里木大学 | Satellite remote sensing monitoring method for cotton canopy chlorophyll b content |
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