Device for measuring content of chlorophyll of crop disease leaves

Abstract

The invention relates to the technical field of agricultural plant protection information and in particular relates to a device for measuring the content of chlorophyll of crop disease leaves. The device comprises a measuring probe, a spectral signal processing device and a height adjuster, wherein the measuring probe consists of a laser, a spectral receiver and a leaf loader; a clamping piece used for clamping is arranged between the laser and the leaf loader; the leaf loader is used for placing and fixing whole leaves of a to-be-measured crop; emergent rays of the laser irradiate the whole leaf surfaces of the to-be-measured crop; the spectral receiver detects spectral signals of the whole leaves of the to-be-measured crop and transmits the spectral signals to the spectral signal processing device; and the height adjuster is arranged on the spectral signal processing device, the measuring probe is loaded, and the measuring probe is subjected to position movement along with elongation or retraction of the height adjuster. According to the device disclosed by the invention, the relative content of the chlorophyll of the whole crop disease leaves can be conveniently and accurately measured, and the effects of establishing rapid disease control measures and guiding the agricultural production are achieved.

Description

technical field [0001] The invention relates to the technical field of agricultural plant protection information, in particular to a device for measuring chlorophyll content of crop disease leaves. Background technique [0002] During the growth and development of crops, the leaves will gradually change from green to yellow due to the lack of nitrogen fertilizer, which is a gradual process. At present, SPAD-502 chlorophyll meter and plant nitrogen balance index measuring instrument (DUALEX SCIENTIFIC) are currently the most widely used measuring instruments for relative chlorophyll content of plant leaves in the world. Among them, the SPAD-502 chlorophyll meter determines the relative amount of chlorophyll in the leaves by measuring the optical concentration difference of the leaves at two wavelengths (650nm and 940nm); DUALEX uses 5 LED light sources (1 ultraviolet light, 1 green light, 1 red light, 2 near-infrared) to measure the chlorophyll index and nitrogen balance ind...

AI Technical Summary

Problems solved by technology

At the same time, there are disease attachments on the lesions. During contact measurement, some parts are artificially knocked off, and some parts are still attached to the leaf surface, which will affect the measurement results; Contamination of sensor accuracy

Again, human factors (different operators will choose different measurement points) are one of the important factors affecting the measurement accuracy, especially when measuring diseased leaves, different selections of diseased spot positions and green parts will have completely different test results, far from Less accurate than whole leaf mean measurements

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