METHOD FOR MAINTAINING A CONSTANT VALUE OF DAY LIGHT INTEGRAL WHEN ILLUMINATING PLANTS IN THE PROCESS OF THEIR GROWTH IN VERTICAL FARMS Russian patent published in 2023 - IPC A01G7/04 A01G9/26 F21S4/20 

FIELD: agricultural lighting.

SUBSTANCE: method includes measuring the plant height at a given time interval during their cultivation and, on its basis, calculating the distance between the phytoilluminator and the level of the upper leaves of plants according to the expression h_i=h_b-h_p, where h_b is the base distance (the distance between the phytoilluminator and the level of the upper borders of trays for plants), cm; h_p is the height of plants in the process of their cultivation, see the value of the density of the photosynthetic photon flux at the level of the upper leaves of plants is determined by the previously constructed functional dependence of the density of the photosynthetic photon flux on the distance between the phytoilluminator and the level of the upper leaves of plants according to the expression PPFD_i =a⋅(h_i)^-b, where a, b are constants depending on the brand and wavelength of the LEDs used in the phytoilluminator, calculation in relative units of the redundancy factor of the density of the photosynthetic photon flux by the expression

where PPFD_b is the base value of the density of the photosynthetic photon flux, µmol⋅m^-2⋅s^-1. Calculate in absolute units the value of the next photoperiod for irradiation of plants in the process of growing by the expression

where T_b - basic photoperiod, hours×day^-1. The phytoilluminator is turned on in a new time interval by the value of the calculated photoperiod.

EFFECT: maintaining an equal daytime integral of light with a growing density of the photosynthetic photon light flux at the level of the upper leaves of plants during cultivation by reducing the photoperiod of the lighting system to reduce electricity consumption, reduce nitrates and increase vitamin C in plants.

1 cl, 1 dwg