Method for dynamically analyzing canopy aging progress of cereal crops by using post-flowering NDVI (normalized difference vegetation index)

A crop canopy and aging technology, applied in the direction of material analysis, material analysis through optical means, data processing applications, etc., to achieve accurate selection and retention, meet material needs, and simple operation
CN112750048APending Publication Date: 2021-05-04CHINA AGRI UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA AGRI UNIV
Publication Date
2021-05-04

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Abstract

The invention discloses a method for dynamically analyzing the canopy aging progress of cereal crops by using post-flowering NDVI (normalized difference vegetation index). The method comprises the following steps: acquiring a post-flowering NDVI dynamic state and carrying out data smoothing, acquiring a post-flowering delta NDVI dynamic state and carrying out Gauss fitting, correspondingly dividing each aging stage and calculating each aging related index. According to the method, the aging progress of different varieties is analyzed by acquiring the NDVI information of canopies of different varieties and constructing the related aging indexes, so that the purpose of identifying and selecting the varieties is achieved. The new method overcomes the defects of time consumption, low efficiency and the like in the traditional measurement based on chemical components or physiological indexes of leaf organs, does not set mathematical limitation for the aging process, fully considers the regular change of growth and development of crops, and can quickly and nondestructively meet the requirements of aging process evaluation of cereal crops.
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Description

technical field

[0001] The invention relates to the field of crop canopy aging diagnosis, in particular to a method for quantitatively analyzing the aging progress of the canopy of cereal crops by using the remote sensing vegetation index NDVI. Background technique

[0002] Aging is a life process that organisms must go through, and it is a fate that no species can escape. For cereal crops, aging is a bridge between the death of old life and the birth of new life, and an important guarantee for the continuous growth of cereal crops. Studying the aging process can help people reveal the growth rules of cereal crops, so that they can better adapt to the right time and place to take effective measures to obtain higher returns. For the occurrence of aging, the predecessors put forward many hypotheses, including the hypothesis of temporal and spatial regulation of genes, the hypothesis of light-carbon imbalance, the hypothesis of nutritional stress and the hypothesis of hormone ...

Claims

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