Визначення оптичних властивостей живильного розчину для вирощування троянд у спектрі ультрафіолетового випромінювання
Abstract
Determine the optical properties of the nutrient solution for roses in the spectrum of ultraviolet radiation
T. Knizhka
It is known that the photoactivation by different authors proposed to use ultraviolet radiation with a wavelength λ = 205 ... 380 nm, so it is necessary to determine the variation of transmittance of ultraviolet radiation nutrient solution with different layer thicknesses solution.
Addressing changes in the intensity of ultraviolet radiation will allow better exploit sources of ultraviolet radiation.
The purpose of research. Explore the changing intensity of UV radiation that passes through the nutrient solution thickness h.
Materials and methods of research. The paper used photometric analysis methods and laws of interaction of electromagnetic radiation with a liquid medium.
Results. The object of study selected aqueous mineral salts (nutrient solution) used in the hydroponic method of growing roses. The chemical composition of the solution presented in the table.
Determination of the optical properties of the nutrient solution was conducted in conjunction KSVU-23, which is designed to study the spectra in the range of 200 to 1200 nm with further processing studies [4].
A layer of nutrient solution h varied from 5 to 18 mm.
The result of the experiment were obtained properties are presented in Fig. 1.
To determine the transmission coefficients, experimental data obroblyuvaly the expression
The results of experimental data on the expression (1) shown in Fig. 1.
Processing of the results was performed according to standard techniques.
Conclusions
In developing settings for photo activation nutrient solutions, in particular, the choice of the radiation source, you should consider the following:
waveband 205 ... 230 nm nutrient solution holds, indicating exposure of inappropriate nutrient solutions this range of ultraviolet radiation; waves in the range of 250 ... 300 nm growth dynamics transmittance is in the range of 2 ... 5% / 40 nm; for the wavelength range 301 ... 380 nm dynamics of growth of 1 ... 3% / 20 nm.
For more efficient use of ultraviolet radiation flux in the installation determined that the use of such lamps ART wave of maximum radiation λ = 365 nm maximum thickness of the irradiated layer of nutrient solution is 5 mm.
References
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Книжка Т. С. Дослідження процесу обробки рідких середовищ оптичним випромінюванням / Т. С. Книжка, Л. С. Червінський // Науковий вісник НУБіП України. – 2014. – Вип. 194. – С. 229–232.
Булатов М. ?. Фотометрические методы анализа / М. ?. Булатов. – Л. : Химия, 2010. – 382 с.
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