METHOD AND DEVICE FOR DETERMINATION OF EXERGY OF OPTICAL RADIATION IN PLANT GROWING Russian patent published in 2006 - IPC A01G7/00 

FIELD: agriculture, ecology, as well as general biology, power engineering, applicable in plant growing and at solution of ecology problems.

SUBSTANCE: the method consists in measurement of the radiant energy supplied to plants with separation of the part of it that is potentially suitable for the use by the plant in the process of photosynthesis with regard to the efficiency of each wave-length within a 300 to 750-nm band. The amount of the measured energy of optical radiation is summed up in all the wave-lengths of the mentioned band, as well as the whole vegetation period from the appearance of shoots to ripening is summed up in time, transformed to photocurrent, and the photocurrent signal is amplified by a preamplifier. The obtained signal is indicated, it is removed by an integrator at a preset time interval, the obtained values are memorized by the integrator, summed up, and the summary value of exergy of optical radiation is obtained. The device for determination of exergy of optical radiation in plant growing has a photometer, in which the spectral sensitivity of the optical detector is similar to the spectral efficiency of photosynthesis, a power supply source and an indicator. In addition, the device has an integrator that sums up the energy of optical radiation supplied to the ground surface during the whole vegetation time period, it has three units: an optical radiation detector unit, meter tuning and graduation unit, and an integrator unit. The optical radiation detector has a cosine packing, diaphragm, light filters, photocell, preamplifier and a body, the output of the optical radiation detector unit is connected to the input of the meter tuning and graduation unit, which is connected to the input of the integrator unit.

EFFECT: provided optimization of the production practice of plant growing products, and reduced power consumption.

3 cl, 2 dwg, 1 ex