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Method for determining summer maize canopy SPAD value estimation model based on hyperspectral technology

A technology for estimating models and determining methods, which is applied in the field of agriculture and forestry, can solve the problems of not establishing a model for estimating the chlorophyll content of summer maize canopy, and achieve the effects of rich sample data, improved reliability, and accurate conclusions

Inactive Publication Date: 2018-12-21
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

The research that has been carried out so far is mainly on the feasibility and basic methods of estimating chlorophyll content by using spectra. Although there are some simple studies on summer corn, a general and high-precision estimation model for summer corn canopy chlorophyll content has not yet been established.

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  • Method for determining summer maize canopy SPAD value estimation model based on hyperspectral technology
  • Method for determining summer maize canopy SPAD value estimation model based on hyperspectral technology
  • Method for determining summer maize canopy SPAD value estimation model based on hyperspectral technology

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Embodiment Construction

[0045] 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.

[0046] Such as figure 1 Shown, a kind of determination method based on hyperspectral summer maize canopy SPAD value estimation model, comprises the following steps:

[0047] S1, using a small-scale lysimeter to test plant summer corn, and monitor the original spectral reflectance and SPAD value of the summer corn canopy;

[0048] The method for measuring the original spectral reflectance of the summer corn canopy in the abov...

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Abstract

The invention discloses a method for determining a summer maize canopy SPAD value estimation model based on hyperspectral technology. The method comprises the following steps: establishing a quantitative relationship model among the summer maize canopy SPAD values, a sensitive band and a spectral index by monitoring and analyzing data such as a plant canopy hyper-spectrum and plant canopy leaf SPAD values, analyzing change characteristics of the summer maize plant canopy spectral reflectivity under different SPAD values by the test of a small-scale lysimeter, determining a summer maize plant canopy original spectrum and a response relationship between a first-order differential and the canopy SPAD values, and screening sensitive bands and the optimal spectral index of the summer maize canopy SPAD values monitored during the whole growth period, thereby promoting the application of hyperspectral technology in accurate management and rapid and non-destructive growth monitoring of summermaize water and fertilizer.

Description

technical field [0001] The invention belongs to the technical field of agriculture and forestry, and in particular relates to a method for determining a hyperspectral-based summer maize canopy SPAD (abbreviation for "Soil and Plant Analyzer Development", Soil and Plant Analyzer Development) value estimation model. Background technique [0002] Chlorophyll content is an important biochemical parameter in the process of plant growth, which can indicate the photosynthetic capacity, developmental stage and nutritional status of vegetation. Compared with the traditional chlorophyll measurement method, hyperspectral remote sensing has high-resolution spectral information, which can distinguish weak changes in crop canopy spectral information, so it can quickly and non-destructively monitor crop growth and nutritional status. However, the chlorophyll content based on the leaf scale only represents the information of a single plant, while the information obtained by remote sensing c...

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Application Information

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IPC IPC(8): G01N21/27
CPCG01N21/27
Inventor 彭致功刘露张宝忠魏征韩娜娜
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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