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Winter wheat canopy chlorophyll estimation system and method

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: 2019-12-13
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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  • Winter wheat canopy chlorophyll estimation system and method

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[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. According to the winter wheat canopy chlorophyll estimation system and method, a six-axis rotor unmanned aerialvehicle with maneuverability, flexibility, high efficiency and rapidness is used for carrying a multispectral camera containing five kinds of spectral information to carry out high-precision and high-temporal-spatial resolution winter wheat spectral image acquisition; accurate spectral reflectivity data are obtained after the reflectivity calibration of a grey board; various vegetation indexes are obtained through the operation of a spectral vegetation coefficient equation set; an optimal model for estimating the key growth period of the chlorophyll content of the canopy of winter wheat is constructed through a stepwise regression analysis method; and the low-error estimation value of the chlorophyll content of the wheat canopy of the wheat winter in fields is obtained; and therefore, aneffective technical means is provided for the accurate fertilization management of 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...

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Application Information

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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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