CN106092969A - A kind of detection method of jujube tree canopy Chlorophyll-a Content - Google Patents
A kind of detection method of jujube tree canopy Chlorophyll-a Content Download PDFInfo
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- CN106092969A CN106092969A CN201610361871.5A CN201610361871A CN106092969A CN 106092969 A CN106092969 A CN 106092969A CN 201610361871 A CN201610361871 A CN 201610361871A CN 106092969 A CN106092969 A CN 106092969A
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- 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
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Abstract
The invention discloses the detection method of a kind of jujube tree canopy Chlorophyll-a 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 483 of Chlorophyll-a Content jujube tree canopy to be determined, 554,600,760,954,1153,1340, the spectral reflectance values of 1406nm wavelength；Each spectral reflectance values is substituted into detection model, is calculated the Chlorophyll-a 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-a Content, specifically
Say, relate to the detection method of a kind of jujube tree canopy Chlorophyll-a Content.
Background technology
Chlorophyll a is the requisite nutrient of jujube growth, and quick obtaining chlorophyll a information is monitoring jujube growth
Grow and the premise of quality guarantee.The detection method of the jujube tree canopy Chlorophyll-a Content that prior art is total needs preparation chemistry examination
Agent, the chemistry tail liquid emissions pollution to environment and the injury to human body during mensuration, and there is complex operation step, detection
The defect of time length.Currently available technology is badly in need of a kind of jujube tree canopy chlorophyll a pollution-free, easy and simple to handle, the most accurate
The detection method of content.
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-a Content, the method achieve the quick and precisely inspection of jujube tree canopy Chlorophyll-a Content
Survey, it is not necessary to prepare any chemical reagent, it is to avoid during measuring, chemistry tail liquid emissions is to the pollution of environment with to human body
Injury, also greatly simplify operating procedure simultaneously, shortens the detection time, can meet the large area Fructus Jujubae garden short time in agricultural production
The interior demand requiring to obtain canopy Chlorophyll-a Content data, provides for fertile precisely the using of jujube tree field management Determination of Chlorophyll a
The means of quick obtaining dose foundation.
Its technical scheme is as follows:
The detection method of a kind of jujube tree canopy Chlorophyll-a 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-a 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 483 of Chlorophyll-a Content jujube tree canopy to be determined, 554,600,760,954,1153,1340,
The spectral reflectance values of 1406nm wavelength.
(4) reflectance value of each wavelength is substituted into jujube tree canopy Chlorophyll-a Content detection model:
Y=0.58939-13.23222x1+0.070986x2-9.943082x3+7.431762x4-11.9541x5-
4.926803x6+15.15402x7+5.408735x8
Wherein, y is jujube tree canopy Chlorophyll-a Content, and unit is mg/g, x1、x2、x3、x4、x5、x6、x7、x8It is respectively jujube tree
Canopy wave band 483,554,600,760,954,1153,1340, the reflectance value of 1406nm.
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, 483 described in step (4), 554,600,760,954,1153,1340, the spectrum of 1406nm wavelength
Reflectance value, the reflectance of 10 times surveyed by same canopy repetition averagely after and through multiplicative scatter correction, wavelet de-noising and
Value after smoothing processing.
The invention have the benefit that
Present invention achieves the quick and precisely detection of jujube tree canopy Chlorophyll-a 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-a 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 a.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-a 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-a Content, comprises the following steps:
(1) measure the hyperspectral information of the jujube tree canopy of Chlorophyll-a 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 483,554,600,760,954,1153,1340, the spectral reflectivity of 1406nm wavelength
Value.
(4) by every curve 483,554,600,760,954,1153,1340, the spectral reflectance values generation of 1406nm wavelength
Enter jujube tree canopy Chlorophyll-a Content detection model:
Y=0.58939-13.23222x1+0.070986x2-9.943082x3+7.431762x4-11.9541x5-
4.926803x6+15.15402x7+5.408735x8
Wherein, y is jujube tree canopy Chlorophyll-a Content, and unit is mg/g, x1、x2、x3、x4、x5、x6、x7、x8It is respectively jujube tree
Canopy wave band 483,554,600,760,954,1153,1340, the reflectance value of 1406nm.
(5) table 1 be the jujube tree canopy Chlorophyll-a 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-a Content detection model obtains, as can be seen from Table 1, actual value and detection
It is worth the meansigma methods of the two, maximum, minima the most close；Fig. 1 is jujube tree canopy Chlorophyll-a Content detected value and actual value
Fitting degree.The coefficient of determination (R between actual value and detected value2) reaching 0.77, root-mean-square error (RMSE) only has
0.088mg/g, average relative error (MRE) only 10.1%, standard deviation reaches 2.06 with root-mean-square error ratio (RPD), according to
RPD evaluation criterion, RPD ＞ 2.0, illustrate that model has the ability of high-precision forecast.This result shows, the method for the present invention is permissible
Detection jujube tree canopy Chlorophyll-a Content accurately and rapidly.
Table 1 jujube tree canopy chlorophyll a 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-a 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-a 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 483 of Chlorophyll-a Content jujube tree canopy to be determined, 554,600,760,954,1153,1340,1406nm ripple
Long spectral reflectance values；
(4) reflectance value of each wavelength is substituted into jujube tree canopy Chlorophyll-a Content detection model:
Y=0.58939-13.23222x1+0.070986x2-9.943082x3+7.431762x4-11.9541x5-4.926803x6
+15.15402x7+5.408735x8
Wherein, y is jujube tree canopy Chlorophyll-a Content, and unit is mg/g, x1、x2、x3、x4、x5、x6、x7、x8It is respectively jujube tree canopy
Wave band 483,554,600,760,954,1153,1340, the reflectance value of 1406nm.
The detection method of jujube tree canopy Chlorophyll-a 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-a 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-a 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-a Content the most according to claim 1, it is characterised in that institute in step (4)
State 483,554,600,760,954,1153,1340, the spectral reflectance values of 1406nm wavelength, 10 surveyed by same canopy
The reflectance of secondary repetition value averagely afterwards and after multiplicative scatter correction, wavelet de-noising and smoothing processing.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239759A (en) * | 2019-12-31 | 2020-06-05 | 塔里木大学 | Satellite remote sensing monitoring method for content of chlorophyll a in cotton canopy |
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| CN101718683A (en) * | 2009-11-10 | 2010-06-02 | 中国农业大学 | Device for fast detection of chlorophyll content in leaf blades, modeling method and detection method |
| CN101762463A (en) * | 2009-12-16 | 2010-06-30 | 中国烟草总公司郑州烟草研究院 | Method for measuring chlorophyll content of fresh tobacco leaf of flue-cured tobacco based on canopy multi-spectra |
| US20110125477A1 (en) * | 2009-05-14 | 2011-05-26 | Lightner Jonathan E | Inverse Modeling for Characteristic Prediction from Multi-Spectral and Hyper-Spectral Remote Sensed Datasets |
| CN102200576A (en) * | 2011-03-10 | 2011-09-28 | 王桥 | Chlorophyll a concentration inversion method and system |
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2016
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Patent Citations (4)
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| US20110125477A1 (en) * | 2009-05-14 | 2011-05-26 | Lightner Jonathan E | Inverse Modeling for Characteristic Prediction from Multi-Spectral and Hyper-Spectral Remote Sensed Datasets |
| CN101718683A (en) * | 2009-11-10 | 2010-06-02 | 中国农业大学 | Device for fast detection of chlorophyll content in leaf blades, modeling method and detection method |
| CN101762463A (en) * | 2009-12-16 | 2010-06-30 | 中国烟草总公司郑州烟草研究院 | Method for measuring chlorophyll content of fresh tobacco leaf of flue-cured tobacco based on canopy multi-spectra |
| CN102200576A (en) * | 2011-03-10 | 2011-09-28 | 王桥 | Chlorophyll a concentration inversion method and system |
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| 严衍禄 等: "《近红外光谱分析的原理、技术与应用》", 31 January 2013 * |
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| CN111239759A (en) * | 2019-12-31 | 2020-06-05 | 塔里木大学 | Satellite remote sensing monitoring method for content of chlorophyll a in cotton canopy |
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Application publication date: 20161109 |