Experimental Research into Laser Method for Detecting Plant Stress

The purpose of the work was to develop a laser fluorescence method for detecting plant stress. For the fluorescence excitation wave of 532 nm. length, we give the results of experimental studies of the spectra of laser-induced plant fluorescence in normal and various stress conditions caused by the presence of various pollutants in the soil (salt, iron and copper sulfate), insufficient or excessive watering, mechanical damage to the leaves and the plant root system. We carried out a comparative analysis of options for selecting the spectral ranges of registering laser-induced fluorescence plant emission. Findings of the research show that for the plant state monitoring tasks, spectral bands with central wavelengths of 685 and 740 nm are the most efficient (in terms of reliability of correct detection of stress state) bands of fluorescence radiation detection.

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