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Wheat plant nitrogen accumulation amount monitoring method based on hyperspectral remote sensing technology

A hyperspectral remote sensing and nitrogen accumulation technology, applied in the field of nitrogen accumulation monitoring in wheat plants, can solve the problems of affecting the adaptability of the model and the influence of the interaction spectrum with little consideration.

Pending Publication Date: 2021-06-25
INST OF PLANT NUTITUION & RESOURCE ENVIRONMENT HENAN ACADEMY OF AGRI SCI
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Problems solved by technology

[0004] So far, scholars at home and abroad have constructed a variety of spectral indices that reflect the nitrogen status of wheat based on multi-band spectral features. However, most of the indices are constructed based on a single wheat variety or a single fertilization level. The complexity of multi-factor interactions and their influence on the spectrum are rarely considered, which affects the adaptability of the model in actual production

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  • Wheat plant nitrogen accumulation amount monitoring method based on hyperspectral remote sensing technology
  • Wheat plant nitrogen accumulation amount monitoring method based on hyperspectral remote sensing technology
  • Wheat plant nitrogen accumulation amount monitoring method based on hyperspectral remote sensing technology

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Embodiment 1

[0034] The method for monitoring nitrogen accumulation in wheat plants based on hyperspectral remote sensing technology specifically includes the following steps:

[0035] (1) Collect spectral data: ASD FieldSpec handheld spectrometer is used, the band range is 350-1075nm, the field of view is 25°, the spectral resolution is 3nm, and the sampling interval is 1.4nm;

[0036] (2) Determination of nitrogen accumulation in wheat plants: separate the wheat plants according to their organs, kill them at 105°C for 30 minutes, dry them at 70°C, and weigh them to obtain the weight of leaves and different organs. After crushing, use the Kjeldahl method to determine Nitrogen content of various organs;

[0037] Among them, nitrogen accumulation = nitrogen content × dry matter;

[0038] (3) Constructing a new vegetation index: use MATLAB software to process the data, analyze the correlation between each vegetation index and the nitrogen accumulation of the plant, select the vegetation ind...

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Abstract

The invention discloses a wheat plant nitrogen accumulation amount monitoring method based on a hyperspectral remote sensing technology. The method specifically comprises the following steps: (1) collecting spectral data; (2) determining the nitrogen accumulation amount of the wheat plants; (3) constructing a new vegetation index; (4) screening out the combined vegetation index NDchl*DDN, MRER*DDI, NDRE*DDN, NDRE*DDI and NDRE*DVI with the correlation R2>0.845 to the nitrogen accumulation of wheat plants, and establishing the monitoring model of wheat plant nitrogen accumulation through regression analysis. According to the method, the effect of estimating the plant nitrogen accumulation amount by comparing and analyzing the newly constructed vegetation index and the conventional vegetation index is expected to determine a quantitative monitoring model of the wheat plant nitrogen accumulation amount, so that a technical support is provided for lossless monitoring of the wheat nitrogen nutrition state by a remote sensing technology.

Description

technical field [0001] The invention relates to the technical field, and more specifically relates to a method for monitoring nitrogen accumulation in wheat plants based on hyperspectral remote sensing technology. Background technique [0002] Nitrogen is a key element necessary for the growth and development of crops, and the deficit and surplus of its content will affect the yield and quality of crops. Due to the excessive pursuit of high yield in production, while promoting the increase of crop yield, it also causes environmental pollution and decline in fertilizer efficiency due to excessive application of nitrogen fertilizer. Therefore, precise fertilization according to the characteristics of crop growth and development has become a current research hotspot. Traditional nitrogen fertilizer management measures are based on destructive sampling in the field and laboratory analysis. Although the single-point accuracy is high, it is time-consuming and labor-intensive, and...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C20/20G06K9/00G01N31/00
CPCG16C20/20G01N31/00G06V20/194G06V20/188G06V20/13
Inventor 宋晓许端阳黄绍敏黄晨晨张珂珂郭斗斗张水清岳克郭腾飞
Owner INST OF PLANT NUTITUION & RESOURCE ENVIRONMENT HENAN ACADEMY OF AGRI SCI
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