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A system and method for estimating winter wheat canopy chlorophyll

A winter wheat and chlorophyll technology, which is applied in the field of agricultural remote sensing, can solve the problems of inability to accurately diagnose the chlorophyll content of the wheat canopy, and the inability of remote sensing technology to take into account the monitoring range and accuracy, and achieve the effect of flexibility.

Active Publication Date: 2021-09-07
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, a system and method for estimating winter wheat canopy chlorophyll provided by the present invention solves the problem that the existing remote sensing technology cannot take into account the monitoring range and accuracy, thus making it impossible to accurately diagnose the chlorophyll content of wheat canopy

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  • A system and method for estimating winter wheat canopy chlorophyll
  • A system and method for estimating winter wheat canopy chlorophyll
  • A system and method for estimating winter wheat canopy chlorophyll

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Embodiment Construction

[0038] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0039] In one embodiment of the present invention, as figure 1 As shown, a winter wheat canopy chlorophyll estimation system, including drones, multispectral cameras, gray boards and light intensity sensors;

[0040] Among them, the model of the multispectral camera is RedEdge-M, which is equipped with five spectral channels with center wavelengths of 475nm, 560nm, 668nm, 717nm and 840nm, which are used to collect reflectan...

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Abstract

The invention discloses a winter wheat canopy chlorophyll estimation system and method, using a flexible, efficient and fast six-axis rotor UAV equipped with a multi-spectral camera containing five kinds of spectral information for high-precision, high-temporal-spatial resolution The winter wheat spectral image is collected, and the accurate spectral reflectance data is obtained after calibration by the gray plate reflectance, and various vegetation indexes are obtained through the operation of the spectral vegetation coefficient equation group, and the key growth of estimating the chlorophyll content of the winter wheat canopy is constructed by stepwise regression analysis method Finally, the best model of the period was obtained, and the low-error estimation value of the chlorophyll content of the canopy of winter wheat in the wheat field was finally obtained, which provided an effective technical means for the precise fertilization management of the farmland.

Description

technical field [0001] The invention relates to the technical field of agricultural remote sensing, in particular to a winter wheat canopy chlorophyll estimation system and method. Background technique [0002] Wheat is the food crop with the largest sown area and the largest yield in the world, and its growing condition and yield affect world food security. The diagnosis of crop growth status is established through the relationship between nutrient elements and spectral differences. Chlorophyll is an important indicator of plant photosynthesis and nitrogen status. Studying the changes in chlorophyll content in different growth stages provides a basis for rapid diagnosis of fertilization. At present, the use of remote sensing technology to estimate the chlorophyll content of crops has become a research hotspot in the field of remote sensing. It mainly uses various spectrometers and sensors to measure the spectral characteristics of crops at different scales to predict the ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/27G06F17/11
CPCG01N21/27G01N21/274G06F17/11
Inventor 张宝忠魏青陈鹤魏征
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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