Plant drought stress diagnostic method and device based on chlorophyll fluorescence imaging technology

Abstract

The invention discloses a plant drought stress diagnostic method and a device based on chlorophyll fluorescence imaging technology. The plant drought stress diagnostic method comprises following steps: 1, sample set plants with known drought stress diagnosis results are subjected to dark adaptation, canopy chlorophyll fluorescence image data of the sample set plants are collected, and related characteristic parameters are extracted; 2, based on the collected chlorophyll fluorescence image data and chlorophyll fluorescence image characteristic parameters, multiple classifiers fusion is adopted to establish a plant drought stress identification model; 3, chlorophyll fluorescence image data and characteristic parameters of plants to be detected are collected via the method disclosed in step 1, and are introduced into the plant drought stress identification model for drought stress diagnosis. The plant drought stress diagnostic method is capable of providing chlorophyll fluorescence parameters, realizing visualization of distribution of the fluorescence parameters in leaf space, displaying the heterogeneity of photosynthesis on leaf surfaces and among leaves, and realizing real-time drought stress diagnosis at high speed at high precision.

Description

technical field [0001] The invention relates to a plant drought stress diagnosis technology, in particular to a plant drought stress diagnosis method and device based on chlorophyll fluorescence imaging technology. Background technique [0002] Under natural or agricultural production conditions, plants are subject to environmental stress. Among them, drought stress caused by water deficit is the most severe. The complexity of plant response to drought stress is relatively high, which can induce a variety of physiological responses, and there is a dynamic process that is constantly changing along with the entire life cycle of plants. [0003] Chlorophyll fluorescence technology has become a powerful tool to track changes in photosynthesis in plants under biotic and abiotic stresses, and fluorescence parameters such as the maximum photon efficiency (Fv / Fm) can reflect the light energy absorption of two photosystems (mainly photosystem II) , transfer, and dissipation efficie...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned technical solutions all measure the chlorophyll fluorescence parameters of leaves at single or multiple points, but after plants are under drought stress, the chlorophyll fluorescence parameters of leaves are spatially heterogeneous, and single-point or multi-point measurement analysis is insufficient

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