CN102207453A - Method for determining aboveground fresh biomass of flue-cured tobacco based on canopy multi-spectra - Google Patents
Method for determining aboveground fresh biomass of flue-cured tobacco based on canopy multi-spectra Download PDFInfo
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- CN102207453A CN102207453A CN 201110070097 CN201110070097A CN102207453A CN 102207453 A CN102207453 A CN 102207453A CN 201110070097 CN201110070097 CN 201110070097 CN 201110070097 A CN201110070097 A CN 201110070097A CN 102207453 A CN102207453 A CN 102207453A
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Abstract
The invention relates to a method for determining aboveground fresh biomass of flue-cured tobacco based on canopy multi-spectra, which is characterized by comprising the following steps of: determining the canopy spectra of the flue-cured tobacco from a resettling stage to a budding early stage by a multispectral radiometer; establishing vegetation indices; establishing a model for inverting the aboveground fresh biomass of the flue-cured tobacco by the canopy spectra parameters by a statistical method; determining the canopy spectra parameters of a sample to be determined; and inputting the canopy spectra parameters into the model, thereby realizing the determination of the aboveground fresh biomass of the flue-cured tobacco. Compared with the prior art, the method has the advantages of in-situ measurement, no need of sampling and no injury to tobacco plants; compared with a hyperspectral radiometer, the method has a larger cost advantage and is more suitable for agricultural production; the determination can be finished only by acquiring data of a 550nm channel and a 730nm channel; and the data processing method and process are simple and convenient.
Description
Technical field
The present invention relates to the mensuration of bright biomass on the field of planting cured tobacco, relate in particular to a kind of method of utilizing bright biomass on the canopy multi-spectra parametric measurement field of planting cured tobacco.
Background technology
Bright biomass is an important indicator of judging the flue-cured tobacco growing way on the field of planting cured tobacco, and decision-making has important indicative significance for the flue-cured tobacco fertilizer management.At present, traditional assay method of bright biomass is on the field of planting cured tobacco: field of planting cured tobacco top is cradled, strive for quality with electronic balance.Shortcoming: the destruction to plant is irreversible, causes economic loss.
The flue-cured tobacco canopy spectra comprises visible light wave range scope and near-infrared band scope.Reflectivity in the visible light wave range scope mainly reflects chlorophyll content in leaf blades and density, and the reflectivity in the near-infrared band scope mainly reflects the canopy structure of flue-cured tobacco.Generally speaking, flue-cured tobacco ground biomass and chlorophyll content in leaf blades height consistance, so ground biomass influences the reflectivity of visible light wave range in the flue-cured tobacco canopy spectra to a certain extent.Simultaneously, ground biomass is big more, and the probability that the light in the near-infrared band scope is reflected also can be big more.Therefore,, set up the model of bright biomass on the inverting field of planting cured tobacco, become a kind of new method of ground biomass Non-Destructive Testing based on the correlativity of bright biomass on the field of planting cured tobacco and canopy spectra parameter.
The pertinent literature of having reported has following characteristics: a. to utilize the target index of canopy spectra prediction or monitoring more with leaf-area coefficient, blade pigment content, serves as that to measure the report of target less with bright biomass on the ground; B. canopy spectra is measured and is adopted high spectral radiometer to finish more, because high spectral radiometer dispersion element all is to adopt holographic reflection grating, cause instrument to cost an arm and a leg, be applicable to scientific research but be not suitable for the field agricultural production, particularly be not suitable for the production line personnel and use.C. the resulting canopy spectra data volume of high spectral radiometer is big, handle more loaded down with trivial details, need more the specialty computer software support.D. the bright biomass monitoring model in the ground of bibliographical information is many sets up based on cereal crops such as wheat, paddy rice, because flue-cured tobacco all exists than big-difference with above-mentioned crop at aspects such as plant type, leaf morphology, canopy structures, so the forecast model of the bright biomass in existing cereal crops ground is not suitable for the mensuration of bright biomass on the field of planting cured tobacco.
Summary of the invention
In order to overcome the problem that exists in the background technology, the object of the present invention is to provide bright biomass mensuration method on a kind of field of planting cured tobacco based on canopy multi-spectra, belong to a kind of original position, fast, the method for bright biomass on the harmless field of planting cured tobacco.
The objective of the invention is to be achieved through the following technical solutions:
Bright biomass mensuration method on the field of planting cured tobacco based on canopy multi-spectra, adopt multispectral radiometer that group's phase is measured to the flue-cured tobacco canopy spectra of buddingging early stage, make up vegetation index, utilize statistical method to set up the model that utilizes bright biomass on the canopy spectra parametric inversion field of planting cured tobacco, measure the canopy spectra parameter of sample to be tested, input model, and then realization is to the mensuration of bright biomass on the field of planting cured tobacco.
Said determination method concrete steps are as follows:
1), the foundation of calibration samples spectra database, choose representative flue-cured tobacco plant, measure its group's phase to the canopy spectra of buddingging early stage, concrete operations mode: adopt MSR16 spectrum spoke meter to carry out, mensuration is advanced rower calmly, totally 16 wave bands, its concrete band setting is: 46,0/5,00/,550,/60,0/6,50/,670,/73,0/7,80/,800,/85,0/9,50/,105,0/1,100,/12 00/1260/1480 nm, 31.1 ° of instrument field angle.Spectroscopic assay is carried out under ceiling unlimited or partly cloudy weather condition, and minute is 10:00-14:00, and probe vertically downward during mensuration, apart from canopy height 1.0-1.5m, every duplicate measurements 1 point is measured 3 times for every, is the canopy spectra parameter of any with the mean value that repeats for 3 times.With calibration samples canopy spectra primary reflection rate input database, and utilize original canopy spectra reflectivity to make up difference vegetation index (DVI) ratio vegetation index (RVI) and normalized differential vegetation index (NDVI).
RVI(λ
1,?λ
2)=ρλ
1/ρλ
2，
DVI(λ
1,?λ
2)=∣ρλ
1-ρλ
2∣，
NDVI (λ
1, λ
2)=∣ ρ λ
1-ρ λ
2∣/(ρ λ
1+ ρ λ
2), wherein ρ is a reflectivity, λ is a wavelength;
2), bright biomass is measured on the calibration samples field of planting cured tobacco, integrating step 1 after measuring calibration samples canopy spectra data, cradles corresponding cigarette strain aerial part, takes by weighing quality with electronic balance rapidly;
3), the structure of forecast model, utilize modeling methods such as multiple linear regression, partial least squares regression, curve estimation to analyze the quantitative relationship of canopy spectra parameter respectively with the bright biomass in ground, by comparing the coefficient of determination of fit equation, it is as follows to make up model:
Bright biomass on the field of planting cured tobacco=15.023 RVI (1050,550)
3.247(n=45, R
2=0.9588**) wherein n is the sample size of participation forecast model structure, R
2Be the coefficient of determination, * * representation model has extremely significantly meaning;
4), the check of forecast model, flue-cured tobacco group's phase to buddingging early stage, picked at random 45 strains are according to step 1 describing method mensuration canopy spectra; Measure bright biomass on the field of planting cured tobacco according to step 2; With the forecast model that makes up in the canopy spectra substitution step 3, bright biomass on the output field of planting cured tobacco.According to surveying the bright biomass in ground and predictably going up bright biomass model is tested, as calculated, the predicted value of model and the measured value matched curve coefficient of determination are 0.9503;
5), the mensuration of sample to be tested canopy spectra, flue-cured tobacco group's phase to buddingging early stage, according to the acquisition method of the correcting sample canopy spectra of description in the step 1 the canopy spectra data of testing sample are measured;
6), the sample to be tested mensuration of bright biomass on the ground, according to the method that step 1 is described the canopy multi-spectra of working sample is measured, and, is drawn the bright biomass in ground of sample to be tested 3 established models of RVI (1050,550) input step of testing sample.
We are referred to as the mensuration of bright biomass on the field of planting cured tobacco of finishing by step 1-6 " bright biomass mensuration method on a kind of field of planting cured tobacco based on canopy multi-spectra ".This method has been compared following advantage with technical background: 1. in-site detecting does not need sampling, to cigarette strain not damaged; 2. comparing with high spectral radiometer has bigger cost advantage, more is applicable to agricultural production; 4. the data that only need obtain 550nm and 1050nm two passages just can be finished mensuration, and data processing method and process are easy.
Description of drawings
Fig. 1 is the structural representation of this method.
Fig. 2 is the structure synoptic diagram of forecast model.
Fig. 3 is the check synoptic diagram of forecast model.
Embodiment
On June 17th, 2009 12:00, in leaf tobacco production base, township, Gu Zhuan shop, Fangcheng County, Henan Province, utilize the multispectral radiometer of MSR16 to multispectral mensuration of cigarette canopy layer, the concrete band setting of instrument is: 46,0/5,00/,550,/60,0/6,50/,670,/73,0/7,80/,800,/85,0/9,50/,105,0/1,100,/12 00/1260/1480 nm, probe vertically downward during mensuration, apart from canopy height 1.3m, measure altogether 3 times, mean value with 3 repetitions is the canopy spectra parameter of this cigarette strain, obtains the canopy spectra data of above-mentioned 16 wave bands altogether.ρ 550=12.64% wherein, ρ 1050=52.67%, its RVI (1050,550)=4.17 as calculated, with this canopy RVI (1050,550) input institute established model:
Bright biomass on the field of planting cured tobacco=15.023 RVI (1050,550)
3.247
Obtaining this bright biomass in cigarette strain ground is 1550g.
Claims (3)
1. bright biomass mensuration method on the field of planting cured tobacco based on canopy multi-spectra, it is characterized in that: adopt multispectral radiometer that group's phase is measured to the flue-cured tobacco canopy spectra of buddingging early stage, make up vegetation index, utilize statistical method to set up the model that utilizes bright biomass on the canopy spectra parametric inversion field of planting cured tobacco, measure the canopy spectra parameter of sample to be tested, input model, and then realization is to the mensuration of bright biomass on the field of planting cured tobacco.
2. bright biomass mensuration method on the field of planting cured tobacco based on canopy multi-spectra according to claim 1, it is characterized in that: concrete steps are as follows:
1), the foundation of calibration samples spectra database, choose representative flue-cured tobacco plant, measure its group's phase to the canopy spectra in earlier stage of buddingging; With calibration samples canopy spectra primary reflection rate input database, and utilize original canopy spectra reflectivity to make up difference vegetation index (DVI) ratio vegetation index (RVI) and normalized differential vegetation index (NDVI)
RVI(λ
1,?λ
2)=ρλ
1/ρλ
2，
DVI(λ
1,?λ
2)=∣ρλ
1-ρλ
2∣，
NDVI (λ
1, λ
2)=∣ ρ λ
1-ρ λ
2∣/(ρ λ
1+ ρ λ
2), wherein ρ is a reflectivity, λ is a wavelength;
2), bright biomass is measured on the calibration samples field of planting cured tobacco, integrating step 1 after measuring calibration samples canopy spectra data, cradles corresponding cigarette strain aerial part, takes by weighing quality with electronic balance rapidly;
3), the structure of forecast model, utilize modeling methods such as multiple linear regression, partial least squares regression, curve estimation to analyze the quantitative relationship of canopy spectra parameter respectively with the bright biomass in ground, by comparing the coefficient of determination of fit equation, it is as follows to make up model:
Bright biomass on the field of planting cured tobacco=15.023 RVI (1050,550)
3.247(n=45, R
2=0.9588**) wherein n is the sample size of participation forecast model structure, R
2Be the coefficient of determination, * * representation model has extremely significantly meaning;
4), the check of forecast model, flue-cured tobacco group's phase to buddingging early stage, picked at random 45 strains are according to step 1 describing method mensuration canopy spectra; Measure bright biomass on the field of planting cured tobacco according to step 2; With the forecast model that makes up in the canopy spectra substitution step 3, bright biomass on the output field of planting cured tobacco;
According to surveying the bright biomass in ground and predictably going up bright biomass model is tested, as calculated, the predicted value of model and the measured value matched curve coefficient of determination are 0.9503;
5), the mensuration of sample to be tested canopy spectra, flue-cured tobacco group's phase to buddingging early stage, according to the acquisition method of the correcting sample canopy spectra of description in the step 1 the canopy spectra data of testing sample are measured;
6), the sample to be tested mensuration of bright biomass on the ground, according to the method that step 1 is described the canopy multi-spectra of working sample is measured, and, is drawn the bright biomass in ground of sample to be tested 3 established models of RVI (1050,550) input step of testing sample.
3. bright biomass mensuration method on the field of planting cured tobacco based on canopy multi-spectra according to claim 2, it is characterized in that: the concrete operations mode of the group's of mensuration phase to the flue-cured tobacco canopy spectra of buddingging early stage is: adopt the MSR16 spectral radiometer to carry out, mensuration is advanced rower calmly, totally 16 wave bands, its concrete band setting is: 46,0/5,00/,550,/60,0/6,50/,670,/73,0/7,80/,800,/85,0/9,50/,105,0/1,100,/12 00/1260/1480 nm, 31.1 ° of instrument field angle, spectroscopic assay is carried out under ceiling unlimited or partly cloudy weather condition, minute is 10:00-14:00, probe vertically downward during mensuration, apart from canopy height 1.0-1.5m, every duplicate measurements 1 point, measuring 3 times for every, is the canopy spectra parameter of any with the mean value that repeats for 3 times.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650587A (en) * | 2012-05-11 | 2012-08-29 | 中国农业大学 | Crop biomass inversion method based on SEBAL-HJ model |
| CN103323404A (en) * | 2013-05-30 | 2013-09-25 | 中国农业科学院北京畜牧兽医研究所 | Method for supplying nitrogenous fertilizer for cool-season gramineous pasture community |
| CN104266978A (en) * | 2014-10-16 | 2015-01-07 | 南京大学 | Method for surveying submerged plant biomass by utilizing ground object reflectance spectrum curve |
| CN109459392A (en) * | 2018-11-06 | 2019-03-12 | 南京农业大学 | A kind of rice the upperground part biomass estimating and measuring method based on unmanned plane multispectral image |
| CN110398465A (en) * | 2019-07-06 | 2019-11-01 | 中国海洋大学 | A kind of cultivation of porphyra biomass estimation method based on spectral remote sensing image |
| CN116308866A (en) * | 2023-05-23 | 2023-06-23 | 武汉大学 | Rice ear biomass estimation method and system based on canopy reflection spectrum |
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| 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 |
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Patent Citations (1)
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| 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 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650587A (en) * | 2012-05-11 | 2012-08-29 | 中国农业大学 | Crop biomass inversion method based on SEBAL-HJ model |
| CN102650587B (en) * | 2012-05-11 | 2014-08-13 | 中国农业大学 | Crop biomass inversion method based on SEBAL-HJ model |
| CN103323404A (en) * | 2013-05-30 | 2013-09-25 | 中国农业科学院北京畜牧兽医研究所 | Method for supplying nitrogenous fertilizer for cool-season gramineous pasture community |
| CN103323404B (en) * | 2013-05-30 | 2015-09-16 | 中国农业科学院北京畜牧兽医研究所 | A kind ofly obtain the method that cold-season-type graminous pasture colony supplements amount of nitrogenous fertilizer |
| CN104266978A (en) * | 2014-10-16 | 2015-01-07 | 南京大学 | Method for surveying submerged plant biomass by utilizing ground object reflectance spectrum curve |
| CN109459392A (en) * | 2018-11-06 | 2019-03-12 | 南京农业大学 | A kind of rice the upperground part biomass estimating and measuring method based on unmanned plane multispectral image |
| CN109459392B (en) * | 2018-11-06 | 2019-06-14 | 南京农业大学 | A kind of rice the upperground part biomass estimating and measuring method based on unmanned plane multispectral image |
| US11029251B2 (en) | 2018-11-06 | 2021-06-08 | Nanjing Agricultural University | Method for estimating aboveground biomass of rice based on multi-spectral images of unmanned aerial vehicle |
| CN110398465A (en) * | 2019-07-06 | 2019-11-01 | 中国海洋大学 | A kind of cultivation of porphyra biomass estimation method based on spectral remote sensing image |
| CN116308866A (en) * | 2023-05-23 | 2023-06-23 | 武汉大学 | Rice ear biomass estimation method and system based on canopy reflection spectrum |
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Application publication date: 20111005 |