Nondestructive detection method for physiological index of plant leaf

Abstract

The invention discloses a nondestructive testing method used for testing the physiological indexes of plant leaves on the basis of invisible-near infrared spectrum, which can carry out the quick and multi-parameter testing on the content of compositions such as chlorophyll, nitrogen, lutein, water and the like simultaneously. The method carries out spectrum collection on calibration samples, subsequently preprocesses the spectrum data, preferably selects the waveband, establishes the calibration model between the spectrum value and the standard value of the content of plant component, and collects the spectrums of the unknown samples; after the spectrum data is pre-processed, the selected waveband data are substituted in the calibration model so as to predict the content of the component to be measured; the technical proposal of the invention adopts full-spectrum information; the measured parameters have strong extensibility and the prediction precision and the model adaptability of the calibration model are improved; the trans-reflective measurement type adopted by the method adopts the spectrum sensitiveness and has stronger adaptability on the leaf type; and the improved wavelet analysis method can simultaneously eliminate the noise of the leaf spectrum data and carries out benchmark line calibration pre-processing on the leaf spectrum and can effectively improve the prediction precision.

Description

technical field [0001] The invention relates to the technical field of nondestructive detection of physiological indicators of plant leaves, in particular to a method for nondestructive detection of physiological indicators of plant leaves based on visible-near infrared spectrum. Background technique [0002] The non-destructive testing of physiological indicators of plant leaves mainly refers to the non-destructive testing of the content of chlorophyll, nitrogen, lutein, water and other substances. It can be used to monitor the growth and health status of plants in real time, analyze the status of water and fertility, , not only can precisely adjust the supply of fertilizer and water, realize precise fertilizer management, save resources, reduce environmental pollution, but also scientifically guide the cultivation work, so as to ensure the healthy growth and good development of cultivated plants and increase crop yield. [0003] At present, the non-destructive testing meth...

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Problems solved by technology

[0005] In view of this, the main purpose of the present invention is to provide a nondestructive detection method for physiological indicators of plant leaves, which can solve the problem of low model applicability, poor anti-interference ability, low detection accuracy, and fewer detection parameters in existing spectral nondestructive detection methods. Technical problem, in order to achieve the above object, the technical solution of the present invention is achieved like this:

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