CN108476696A - A kind of double cropping of rice ear manuer based on spectrum chases after nitrogen regulation and control method - Google Patents
A kind of double cropping of rice ear manuer based on spectrum chases after nitrogen regulation and control method Download PDFInfo
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- CN108476696A CN108476696A CN201810228681.5A CN201810228681A CN108476696A CN 108476696 A CN108476696 A CN 108476696A CN 201810228681 A CN201810228681 A CN 201810228681A CN 108476696 A CN108476696 A CN 108476696A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C21/00—Methods of fertilising, sowing or planting
- A01C21/007—Determining fertilization requirements
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- 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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Abstract
The invention discloses a kind of, and the double cropping of rice ear manuer based on spectrum chases after nitrogen regulation and control method by acquiring the jointing stage double cropping of rice canopy spectra data lossless real-time leaf area index LAI of estimation, in conjunction with the maximum leaf area index LAI under double cropping of rice target outputmax, total nitrogen requirement TFDkghm‑2With unit leaf area index nitrogen requirement LND△LAI, kghm‑2, double cropping of rice ear manuer is calculated according to formula and chases after nitrogen quantity FNR kghm‑2, the real-time leaf area index of double cropping of rice can be quickly and accurately estimated, and then calculate double cropping of rice ear manuer and nitrogen quantity is chased after accurately double cropping of rice nitrogenous fertilizer to be instructed to put into.
Description
Technical field
The invention belongs to the accurate administrative skill field of arable farming, it is related to a kind of double cropping of rice ear manuer and chases after nitrogen regulation and control method.
Background technology
High-quality, highly efficient and productive, ecological, safety is the important goal of current development double cropping of rice production, and is grown to double cropping of rice
It is to realize the key technique of this target that situation, which carries out real non-destructive monitoring with Precise Diagnosis regulation and control,.Traditional double cropping of rice is planted
Training regulation and control model has the characteristics that certain crudeness and non-quantitation, it is difficult to meet the scientific and smart of modern double cropping of rice production
Trueization requirement.Lack real-time, accurate, quantitatively non-destructive monitoring and diagnosis regulation and control double cropping of rice upgrowth situation skill in production at present
It is empirical to rely primarily on " visually see seedling apply fertilizer ", leaf color card and the chlorophyll meter SPAD based on individual blade organ level etc. for art
With the regulation and administration measure of semidefinite quantization, as a result often result in production that more universal nitrogen fertilizer application amount is big, utilization rate is low, environment is dirty
Dye waits serial adverse consequences again, to influence the high yield upgrading synergy of double cropping of rice production.
It is to realize that double cropping of rice growing way is real-time, lossless, quick diagnosis based on reflectance spectrum monitoring, diagnosing double cropping of rice upgrowth situation
Effective tool and means.Compared with traditional monitoring, diagnosing means, the technology is quick, lossless, time saving, laborsaving, and information
Amount to obtain is big, is to implement variable during double cropping of rice accurately manages to put into indispensable critical support technology.Therefore, it establishes this fast
Speed is convenient, accurately and effectively the double cropping of rice ear manuer based on spectrum chases after nitrogen regulation and control method, for science, precisely in real time guidance it is double
Season rice production management is of great practical significance and application value.
Invention content
The purpose of the present invention is in view of the above shortcomings of the prior art, propose that a kind of double cropping of rice ear manuer based on spectrum chases after nitrogen
Regulation and control method, this method can quickly and accurately estimate the real-time leaf area index of double cropping of rice, and then calculate double cropping of rice ear manuer
Nitrogen quantity is chased after accurately double cropping of rice nitrogenous fertilizer to be instructed to put into.
A kind of double cropping of rice ear manuer based on spectrum chases after nitrogen regulation and control method, acquires jointing stage double cropping of rice canopy spectra data lossless
Real-time leaf area index LAI is estimated, in conjunction with the maximum leaf area index LAI under double cropping of rice target outputmax, total nitrogen requirement
TFDkg·hm-2With unit leaf area index nitrogen requirement LND△LAI, kghm-2, double cropping of rice ear manuer is obtained according to following formula (1)
Chase after nitrogen quantity FNR, kghm-2；
FNR=(LAImax-LAI)×LND△LAI (1)。
A kind of double cropping of rice ear manuer based on spectrum chases after nitrogen regulation and control method, the maximum blade face under the double cropping of rice target output
Product index LAImaxIt is to be obtained by the historical data under local high-yield condition.
A kind of double cropping of rice ear manuer based on spectrum chases after nitrogen regulation and control method, and the jointing stage, real-time leaf area index LAI was
The lossless estimation of difference vegetation index by obtaining double cropping of rice canopy acquires, shown in calculation formula such as formula (2), jointing stage double cropping of rice
The difference vegetation index DVI of canopy can be acquired by formula (3)：
LAI=a × DVI+b (2)；
DVI=R810–R720(3)；
In formula (2), a, b are equation coefficient, and early rice a, b value is respectively 31.371,0.1239, and late rice a, b value is respectively
17.187、1.7342；In formula (3), R810And R720The respectively spectral reflectivity of jointing stage double cropping of rice canopy 810nm and 720nm,
Spectral reflectivity, which measures, uses crop growth monitoring diagnostic equipment, when measurement measuring probe vertically downward, from canopy 1m, each cell
It measures at 3 points to be averaged as the cell spectral reflectance values.
A kind of double cropping of rice ear manuer based on spectrum chases after nitrogen regulation and control method, the unit blade face under the double cropping of rice target output
Product index nitrogen requirement LND△LAI, can be acquired by formula (4)：
LND△LAI=TFD/LAImax(4)；
In formula (4), TFD is the total nitrogen requirement (kghm for obtaining target output-2), going through under local high-yield condition can be passed through
History data obtain.
Wherein maximum leaf area index LAImaxSee data in figure one with total nitrogen requirement TFD of target output.
Beneficial effects of the present invention
The method that the present invention uses can quickly and accurately estimate the real-time leaf area index of double cropping of rice, and then calculate
Double cropping of rice ear manuer chases after nitrogen quantity accurately double cropping of rice nitrogenous fertilizer to be instructed to put into.
Description of the drawings
Figure one is Nanchang County of Jiangxi Province, the main cultivation in Xingan County is early, Varieties In Late Rice parameter.
Specific implementation mode
Embodiment 1
Double cropping of rice ear manuer is carried out in Nanchang County of Jiangxi Province and Xingan County proving ground within 2015 and has chased after nitrogen regulation and control experiment, to survey
Double cropping of rice ear manuer of the examination based on spectrum chases after nitrogen regulation and control method.Early 17 and five are praised in being respectively for examination early rice and Varieties In Late Rice in Nanchang County
Feng You T025, Xingan County are respectively strain two excellent 1 and five Feng You T025 for examination early rice and Varieties In Late Rice, and each testing site is respectively provided with
4 pieces of fields, base manure and tillering fertilizer are pressed local conventional amount used and are applied, and chase after nitrogen using double cropping of rice of the present invention on this basis
Method carries out the quantitative estimation and recommendation that double cropping of rice ear manuer chases after nitrogen quantity, to obtain the different nitrogenous fertilizer based on field and growing way difference
Amount of application.Below by taking the ear manuer for praising early 17 fields 1 in Nanchang County's early-paddy brown rice chases after nitrogen quantity as an example, illustrate the calculating of the method for the present invention
Process is as follows：
1. being measured using crop growth monitoring diagnostic equipment in the jointing stage and praising 1 canopy 810nm of early 17 field in early-paddy brown rice
(R810) and 720nm (R720) spectral reflectivity, every piece of field is surveyed 3 times and is averaged, and calculates difference vegetation index value DVI=
R810-R720=0.36-0.21=0.14.
2. the difference vegetation index value DVI being calculated is substituted into early rice leaf area index spectrum monitoring model (LAI=
31.371 × DVI+0.1239) calculate jointing stage real-time leaf area index value LAI be 4.52.
3. the local rice cropping expert of consulting is obtained good in early-paddy brown rice by the historical data under local high-yield condition
Early 17 obtain the maximum leaf area exponential quantity LAI of target outputmaxWith total nitrogen requirement value TFD, difference value 6.2 and 142.5kg
hm-2, and then be calculated and obtain unit leaf area index nitrogen requirement LND△LAI=TFD/LAImax=142.5/6.2=
22.98kg·hm-2。
4. above-mentioned value substitution ear manuer is chased after nitrogen quantity regulation-control model [FNR=(LAImax–LAI)×LND△LAI] in, you can it calculates
Show that the ear manuer that early 17 fields 1 are praised in early-paddy brown rice chases after nitrogen quantity FNR=(6.2-4.52) × 22.98=38.61kghm-2。
Similarly, it can be calculated in Nanchang County's early-paddy brown rice using the method for the present invention and praise early 17 and five Feng You of late rice
The ear manuer of T025 and excellent No. 1 of Xingan County early-paddy brown rice strain two and five Feng You T025 demonstration fields of Varieties In Late Rice chases after nitrogen quantity, specifically
It the results are shown in Table 1.
Double cropping of rice ear manuer of the table 1 based on spectrum chases after nitrogen regulation and control scheme
Embodiment 2
The field that 2 different Cultural plans were set with 2016 in Nanchang County of Jiangxi Province and Xingan County proving ground in 2015
Nitrogenous fertilizer is tested, respectively regulation and control scheme and peasant household's scheme, and the base manure and tillering fertilizer of two schemes are pressed local conventional amount used and applied.It adjusts
The ear manuer of prosecutor case chases after nitrogen quantity and calculates generation by the method for the present invention, and the ear manuer of peasant household's scheme chases after nitrogen quantity by local peasant household's conventional amount used
Using to the yield and economic benefit of the comparative evaluation present invention and peasant household's general planting.Nanchang County is for examination early rice and late rice product
Early 17 and five Feng You T025 are praised in kind being respectively, Xingan County is respectively strain two excellent 1 and five Feng You for examination early rice and Varieties In Late Rice
T025。
2 are the results are shown in Table, compared with peasant household's scheme, the regulation and control scheme generated by the method for the invention shows significantly to increase production
With section nitrogen advantage, utilization rate of nitrogen fertilizer and economic benefit are improved, averagely increases production 6.26%, section nitrogen 5.3% compared with peasant household's scheme.Explanation
The method of the present invention can quick and convenient, accurate generation double cropping of rice ear manuer chase after nitrogen quantity, realize the precision of double cropping of rice production management
And digitlization, the level of IT application and comprehensive benefit of double cropping of rice production management are improved conscientiously.
The volume increase of the different Cultural plans of table 2 and section nitrogen Benefit Transfer
Claims (4)
1. a kind of double cropping of rice ear manuer based on spectrum chases after nitrogen regulation and control method, it is characterised in that：Acquire jointing stage double cropping of rice canopy light
The lossless real-time leaf area index LAI of estimation of modal data, in conjunction with the maximum leaf area index LAI under double cropping of rice target outputmax、
Total nitrogen requirement TFDkghm-2With unit leaf area index nitrogen requirement LND△LAI, kghm-2, obtained according to following formula (1) double
Season, spike of rice fertilizer chased after nitrogen quantity FNR, kghm-2；
FNR=(LAImax-LAI)×LND△LAI (1)。
2. a kind of double cropping of rice ear manuer based on spectrum according to claim 1 chases after nitrogen regulation and control method, it is characterised in that：It is described
Double cropping of rice target output under maximum leaf area index LAImaxIt is to be obtained by the historical data under local high-yield condition.
3. a kind of double cropping of rice ear manuer based on spectrum according to claim 1 chases after nitrogen regulation and control method, it is characterised in that：It is described
Jointing stage real-time leaf area index LAI be by obtain double cropping of rice canopy difference vegetation index it is lossless estimation acquire, calculate
Shown in formula such as formula (2), the difference vegetation index DVI of jointing stage double cropping of rice canopy can be acquired by formula (3)：
LAI=a × DVI+b (2)；
DVI=R810–R720(3)；
In formula (2), a, b are equation coefficient, and early rice a, b value is respectively 31.371,0.1239, late rice a, b value is respectively 17.187,
1.7342；In formula (3), R810And R720Respectively the spectral reflectivity of jointing stage double cropping of rice canopy 810nm and 720nm, spectrum are anti-
Penetrate rate and measure and use crop growth monitoring diagnostic equipment, when measurement measuring probe vertically downward, from canopy 1m, each cell measurement 3
Point is averaged as the cell spectral reflectance values.
4. a kind of double cropping of rice ear manuer based on spectrum according to claim 1 chases after nitrogen regulation and control method, it is characterised in that：It is described
Double cropping of rice target output under unit leaf area index nitrogen requirement LND△LAI, can be acquired by formula (4)：
LND△LAI=TFD/LAImax(4)；
In formula (4), TFD is the total nitrogen requirement (kghm for obtaining target output-2), the history under local high-yield condition can be passed through
Data obtain.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111652754A (en) * | 2020-05-19 | 2020-09-11 | 江西省农业科学院农业工程研究所 | Intelligent spectrum monitoring and nitrogen fertilizer quantitative diagnosis system and method for Nanfeng mandarin orange |
| CN116297243A (en) * | 2023-02-28 | 2023-06-23 | 北京市农林科学院信息技术研究中心 | Method and device for estimating dressing amount of flue-cured tobacco nitrogenous fertilizer, electronic equipment and storage medium |
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| CN102318466A (en) * | 2011-07-12 | 2012-01-18 | 南京农业大学 | Rice nitrogen topdressing regulation and control method based on nitrogen spectral index method |
| CN105445229A (en) * | 2015-12-15 | 2016-03-30 | 河南农业大学 | Nitrogen balance spectroscopy-based wheat spring nitrogenous fertilizer application method, and construction method of nitrogen topdressing amount model thereof |
| CN107690925A (en) * | 2017-11-09 | 2018-02-16 | 湖南杂交水稻研究中心 | A kind of accurate topdressing method of hybrid rice |
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Patent Citations (3)
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| CN102318466A (en) * | 2011-07-12 | 2012-01-18 | 南京农业大学 | Rice nitrogen topdressing regulation and control method based on nitrogen spectral index method |
| CN105445229A (en) * | 2015-12-15 | 2016-03-30 | 河南农业大学 | Nitrogen balance spectroscopy-based wheat spring nitrogenous fertilizer application method, and construction method of nitrogen topdressing amount model thereof |
| CN107690925A (en) * | 2017-11-09 | 2018-02-16 | 湖南杂交水稻研究中心 | A kind of accurate topdressing method of hybrid rice |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111652754A (en) * | 2020-05-19 | 2020-09-11 | 江西省农业科学院农业工程研究所 | Intelligent spectrum monitoring and nitrogen fertilizer quantitative diagnosis system and method for Nanfeng mandarin orange |
| CN111652754B (en) * | 2020-05-19 | 2022-04-22 | 江西省农业科学院农业工程研究所 | Intelligent spectrum monitoring and nitrogen fertilizer quantitative diagnosis system and method for Nanfeng mandarin orange |
| CN116297243A (en) * | 2023-02-28 | 2023-06-23 | 北京市农林科学院信息技术研究中心 | Method and device for estimating dressing amount of flue-cured tobacco nitrogenous fertilizer, electronic equipment and storage medium |
| CN116297243B (en) * | 2023-02-28 | 2024-02-02 | 北京市农林科学院信息技术研究中心 | Method and device for estimating dressing amount of flue-cured tobacco nitrogenous fertilizer, electronic equipment and storage medium |
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