CN1900695A - Field quick monitoring method for wheat nitrogen content and seed protein quality based on high light spectrum - Google Patents
Field quick monitoring method for wheat nitrogen content and seed protein quality based on high light spectrum Download PDFInfo
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- CN1900695A CN1900695A CNA2005100854690A CN200510085469A CN1900695A CN 1900695 A CN1900695 A CN 1900695A CN A2005100854690 A CNA2005100854690 A CN A2005100854690A CN 200510085469 A CN200510085469 A CN 200510085469A CN 1900695 A CN1900695 A CN 1900695A
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Abstract
The disclosed method obtains information of nitrogen content and grain texture of wheat in field quickly. Setting up probe horizontally, and being perpendicular to wheatear layer, the method obtains spectral reflectivity of wheatear layer, and further extracts sensitive wave bands and sensitive spectral diagnostics parameters of ear total nitrogen content (ETNC). Through ETNC, grain protein content (GPC) is related to spectrum, and finally, forecasting model of spectrum of GPC is built. Or obtaining spectrum of wheatear in field can determine nitrogen content and grain protein content. Comparing with traditional indoor chemical analysis method, the invention possesses advantages of easy of operation, saving time and labor, no destructive. The traditional remote sensing method obtains mixed spectrum including background of soil, stems and leaves so that it is not applicable to practical use since it is low accuracy. The invention can obtain information needed before harvest.
Description
Technical field the present invention relates to the method for testing of crop physiology index in the agricultural, particularly the method for obtaining at field wheat nitrogen content and protein quality information.
Background technology nitrogen content and seed protein quality are the important evidence of measure enforcement of wheat good quality and high output efficiency cultivation technology for high and product purchase, and field fast measuring wheat nitrogen content and grain quality method, technology and product are the focuses of studying at present.The acquisition methods of wheat nitrogen content and grain quality information mainly is to adopt indoor chemico-analytic method at present, and this method complicated operation is wasted time and energy, and has the destructiveness to plant.Utilize remote sensing technology monitoring wheat canopy to comprise that the physics and chemistry information of nitrogen also carried out a large amount of tests in recent years, for realize field condition down fast, non-destructive monitoring wheat nitrogen content and seed protein quality lay a good foundation.But, high spectrum resolution remote sensing technique mensuration in ground all was to adopt the method for from top to bottom measuring the wheat canopy spectrum information by the remote sensing of simulation space flight and aviation in the past, and canopy spectrum information is the mixed spectra of heterogeneities such as the cauline leaf that comprises Soil Background and plant, fringe, and, also to be subjected to the influence of the different plant types of wheat, as: flat-type kind blade hangs down loosely and lifts on the erect type kind blade, the annoyance level difference that it is Soil Background that the difference of this plant type can cause its vegetation coverage difference.Therefore, the method for this traditional mensuration canopy makes the different organs of wheat nitrogen information extract difficulty, and the predicted protein quality model accuracy of having set up is lower, and it is also relatively poor to be subjected to variety type to influence universality, fails to be applied in producing at present.
Summary of the invention the present invention is directed under the field condition monitoring method of wheat nitrogen and improves.Measure the method that probe is from top to bottom measured canopy with respect to tradition, we adopt is the probe horizontal positioned and carries out method for measuring perpendicular to the fringe layer, by obtaining fringe layer spectral reflectivity (Fig. 1), with so the sensitive band and the sensitivity spectrum characteristic parameter of the fringe total nitrogen content (ETNC) that extracts, set up the spectral prediction model of ETNC.Simultaneously, set up the correlation model of ETNC and grain protein content (GPC), utilized ETNC to reflect grain protein content (GPC) preferably.Therefore, based on the total nitrogen content of spectrum, fringe and the correlationship between the grain protein content three, finally set up the spectral prediction model of GPC, promptly the spectrum that obtains the wheatear layer by the field just can be realized the prediction to its nitrogen content and seed protein quality.
Embodiment
The first, at the wheat stage of wax ripeness, fringe layer and the boundary of fringe lower floor are obviously, select sunny weather 10:00～14:00 to measure, measure with the probe placement of ground high spectrometer and perpendicular to the fringe layer during mensuration, field angle is 25 degree during mensuration, the frontlighting direction is carried out, and obtains fringe layer spectral reflectivity.
The second, the sensitive band of determining fringe total nitrogen content (ETNC) is 670-683nm.And set up the correlation model (I) that utilizes ratio vegetation index RVI (890,670) that fringe layer spectrum makes up and ETNC:
ETNC(％)＝0.53×RVI(890，670)+1.02 (n＝29，r＝0.659
**)
The 3rd, set up the correlation model (II) of ETNC and grain protein content (GPC):
GPC％＝4.67×ETNC(％)+5.89 (n＝29，r＝0.727
**)
The 4th, by (I) (II) link of two models set up the spectral prediction model utilize RVI (890,670) prediction GPC:
GPC％＝2.47×RVI(890，670)+11.07 (n＝29，r＝0.453
*)
The 5th, set up " based on the wheat nitrogen content and the seed protein quality field quick monitoring method of high spectrum " software systems based on above-mentioned principle
We measure serial contents such as sensitive band and nitrogen, seed protein forecast model, test gordian technique, system software this probe horizontal positioned and perpendicular to the nitrogen content that the fringe layer carries out method for measuring and corresponding foundation and call new method.Its major advantage is: the fringe layer spectral reflectivity that obtains is not subjected to the interference of Soil Background, is not subjected to the influence of plant type yet.The first, avoided classic method to measure the problem of mixed spectra.What new method was measured is the spectrum that only comprises the fringe layer, so with respect to the canopy mixed spectra that utilizes classic method to obtain, utilize the spectrum (see figure 2) of the fringe layer spectrum of new method acquisition near pure fringe; The second, with respect to the blade nitrogen content, the total nitrogen content of fringe (ETNC) has better correlativity with grain protein content (GPC).As can be seen from Figure 3, based on the relation of fringe layer spectral signature parameter RVI, ETNC and GPC and GPC predicted value that obtains and the measured value good relationship of GPC, precision of prediction is higher, and slope of a curve approaches 1.Then take second place based on the GPC of the RVI of canopy prediction and the GPC of actual measurement.Change the fringe layer into by canopy mensuration and measure the coefficient of determination R of GPC predicted value and measured value
2Bring up to 0.865 by 0.662, total root-mean-square deviation RMSE is reduced to 0.734 by 0.851.Lay a good foundation for the intelligent monitor of portable wheat nitrogen of development and seed protein quality based on sensitive band and spectral prediction model thereof that new method is determined.Promptly further can utilize the sensitive band active illuminating of wheatear nitrogen, measure its reflectivity, and then reach purpose plant nitrogen content and seed protein quality prediction and fast detecting.And this technology also has the value of reference to the fast monitored of other crops such as paddy.
Claims (5)
1, high spectrometer probe level and perpendicular to method for measuring of wheatear layer and relevant art.
Corresponding test method and technology comprise:
1) critical period-stage of wax ripeness of Ce Dinging.
The vertical fringe layer of the direction-frontlighting of probe is measured when 2) measuring
The field angle-25 that adopts when 3) measuring °
2, the sensitive band (670-683nm) of the fringe total nitrogen content (ETNC) of Que Dinging.
3, the computing formula of fringe total nitrogen content:
ETNC(％)＝0.53×RVI(890，670)+1.02(n＝29，r＝0.659
**)
4, utilize the spectral prediction model of RVI (890,670) prediction grain protein content (GPC):
GPC％＝2.47×RVI(890，670)+11.07(n＝29，r＝0.453
*)
5, the software systems " the high spectral analysis software of wheat nitrogen content and seed protein quality " about measuring.
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| CNA2005100854690A CN1900695A (en) | 2005-07-21 | 2005-07-21 | Field quick monitoring method for wheat nitrogen content and seed protein quality based on high light spectrum |
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| CNA2005100854690A CN1900695A (en) | 2005-07-21 | 2005-07-21 | Field quick monitoring method for wheat nitrogen content and seed protein quality based on high light spectrum |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175611A (en) * | 2011-01-07 | 2011-09-07 | 四川农业大学 | Physiological parameter-based fast identification method of resistance of wheat scab |
| CN102313699A (en) * | 2011-05-26 | 2012-01-11 | 北京农业信息技术研究中心 | Estimation method of total nitrogen content in crop canopy leaf |
| CN102435553A (en) * | 2010-09-29 | 2012-05-02 | 李少昆 | Method for utilizing spectral indexes to monitor protein content of wheat grains |
| CN102612892A (en) * | 2012-03-02 | 2012-08-01 | 北京农业信息技术研究中心 | Identification method for sprouting conditions of wheat ears |
| CN103278197A (en) * | 2013-05-31 | 2013-09-04 | 南京农业大学 | Crop growth monitoring device and method based on vehicle-mounted system |
| CN103868880A (en) * | 2014-01-24 | 2014-06-18 | 河南农业大学 | Wheat leaf nitrogen content monitoring method based on spectrum double-peak index and method for establishing monitoring model |
| CN106018321A (en) * | 2016-05-11 | 2016-10-12 | 中国农业大学 | Establishment method for single corn seed protein detection model and application of establishment method |
| CN107014765A (en) * | 2017-05-23 | 2017-08-04 | 河南科技学院 | A kind of wheat quality safety tracing system controlled for Internet of Things |
| CN111398198A (en) * | 2020-04-29 | 2020-07-10 | 中国农业大学 | Rapid nondestructive testing method for wheat grain trace elements |
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2005
- 2005-07-21 CN CNA2005100854690A patent/CN1900695A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435553A (en) * | 2010-09-29 | 2012-05-02 | 李少昆 | Method for utilizing spectral indexes to monitor protein content of wheat grains |
| CN102175611A (en) * | 2011-01-07 | 2011-09-07 | 四川农业大学 | Physiological parameter-based fast identification method of resistance of wheat scab |
| CN102313699A (en) * | 2011-05-26 | 2012-01-11 | 北京农业信息技术研究中心 | Estimation method of total nitrogen content in crop canopy leaf |
| CN102313699B (en) * | 2011-05-26 | 2013-03-13 | 北京农业信息技术研究中心 | Estimation method of total nitrogen content in crop canopy leaf |
| CN102612892A (en) * | 2012-03-02 | 2012-08-01 | 北京农业信息技术研究中心 | Identification method for sprouting conditions of wheat ears |
| CN103278197B (en) * | 2013-05-31 | 2016-02-03 | 南京农业大学 | A kind of crop growth monitoring apparatus and method based on onboard system |
| CN103278197A (en) * | 2013-05-31 | 2013-09-04 | 南京农业大学 | Crop growth monitoring device and method based on vehicle-mounted system |
| CN103868880A (en) * | 2014-01-24 | 2014-06-18 | 河南农业大学 | Wheat leaf nitrogen content monitoring method based on spectrum double-peak index and method for establishing monitoring model |
| CN103868880B (en) * | 2014-01-24 | 2016-08-17 | 河南农业大学 | Wheat leaf blade nitrogen content monitoring method based on the bimodal index of spectrum and the construction method of monitoring model thereof |
| CN106018321A (en) * | 2016-05-11 | 2016-10-12 | 中国农业大学 | Establishment method for single corn seed protein detection model and application of establishment method |
| CN107014765A (en) * | 2017-05-23 | 2017-08-04 | 河南科技学院 | A kind of wheat quality safety tracing system controlled for Internet of Things |
| CN107014765B (en) * | 2017-05-23 | 2023-04-07 | 河南科技学院 | Wheat quality safety tracing system for Internet of things control |
| CN111398198A (en) * | 2020-04-29 | 2020-07-10 | 中国农业大学 | Rapid nondestructive testing method for wheat grain trace elements |
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