METHOD FOR ILLUMINATING PLANTS FROM ABOVE WHEN GROWING UNDER PROTECTION, MAINTAINING A CONSTANT VALUE OF THE SURFACE DENSITY OF THE PHOTOSYNTHETIC FLUX AT THE LEAF LEVEL IN THE PROCESS OF GROWTH, AND SYSTEM IMPLEMENTING SAID METHOD Russian patent published in 2022 - IPC A01G9/20 A01G9/26 A01G7/04 

FIELD: agriculture.

SUBSTANCE: inventions relate to the field of agriculture, lighting equipment, photobiology, and can be used in protected vegetable farming for electric illumination of plants during growing. In the method, the value of the surface density of the photosynthetic flux at the leaf level is maintained constant by constantly monitoring the distance from the phyto-irradiator to the upper leaves of plants and adjusting the value of the surface density of the photosynthetic flux accounting for the change in said distance in the process of plant growth. The level of surface density of the photosynthetic flux is adjusted by transmitting information about the distance from the phyto-irradiator to the upper leaves from the distance sensors to the emission intensity and spectral composition control unit wherein the photosynthetic photon flux of the irradiator is determined in accordance with the preset, previously obtained dependence of said flux on the measured distance. The emission intensity and spectral composition control unit generates a control impact supplied to the adjustable phyto-irradiator power supply driver, wherein the value of the photosynthetic photon flux is reduced and a constant value of surface density of the photosynthetic flux at the leaf level is provided by reducing the value of electric current flowing through the LEDs of the phyto-irradiator. The system comprises multiple multispectral phyto-irradiators illuminating plants from above when growing under protection; sensors for determining the distance from the phyto-irradiator to the upper leaves of plants; a radiation intensity and spectral composition control unit whereto the information about the distance from the phyto-irradiator to the upper leaves of plants is supplied from the distance sensors and the photosynthetic photon flux of the irradiator is determined; and an adjustable phyto-irradiator power supply driver controlled by an emission intensity and spectral composition control unit providing a constant value of surface density of the photosynthetic flux at the upper leaf level by changing the value of the electric current flowing through the LEDs of the phyto-irradiator.

EFFECT: inventions provide a possibility of forming an optimal light environment for plants, eliminating excessive illumination, increasing the energy efficiency and reliability of the illumination system, ensuring an increase in the yield and quality of products.

2 cl, 4 dwg