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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

Pending Publication Date: 2021-05-04
CHINA AGRI UNIV
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Problems solved by technology

However, many divisions about the aging process involve artificially set numerical decline ratios, and the growth and development of crops is the result of the joint action of genes and the environment, and it is difficult to define them uniformly with fixed mathematical laws

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0050] Embodiment 1, the method for analyzing the aging progress of winter wheat canopy based on post-anthesis NDVI dynamic analysis

[0051] 1. Test settings

[0052] The winter wheat experiment was carried out at the Wuqiao Experimental Station of China Agricultural University from 2019 to 2020. A comparative experiment of different winter wheat varieties was set up to create a group canopy with differences. The specific cultivation information is as follows:

[0053] (1) The test varieties include:

[0054] Field cultivars (lines): Cangyou 2018, Guan 35, Cangyou 5766, Shimai 22, Zhongmai 1062, Nongda 3636, Heng 4399, Liangxing 66, Shinong 086, Jimai 418, Cang 6005.

[0055] The research group self-selected varieties (lines): Selected Line 127, Xin Line 49, Xin Line 33, Xin Line 22, Xin Line 9, Selected Line S-1, and Selected Line 135.

[0056] (2) Cultivation measures: the previous crop is summer corn, and the soil in the 0-20cm soil layer before sowing contains 12.14g / kg...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/02G01N21/17G01N21/55
CPCG06Q50/02G01N21/17G01N21/55G01N2021/1793
Inventor 王志敏周晓楠刘影张英华孙振才李伟高艳梅秦伟龙王剑
Owner CHINA AGRI UNIV
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