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Spectral reflection characteristics of plants vary during the vegetation period with the effect of plant nutrient concentrations, stress and other factors. Intense fertilization is done in order to increase the yield and to provide the dark green leaf color preferred by the consumer in a short time, such as rocket ( Eruca sativa L.). In this study, the effects of solid and liquid organic fertilizer applications applied to the arugula at increasing doses on the energy usage in different wavelength ranges of the electromagnetic spectrum were investigated. The study was carried out in a controlled greenhouse environment according to randomized plot design. In the experiment, solid organic fertilizer (KOG) and liquid organic fertilizer (SOG) were applied at different doses throughout the plant growing period. In this process, spectroradiometric measurements were performed by hand spectroradiometer in the wavelength range of 330-1075 nm of the electromagnetic spectrum. As a result of the research, it has been found that there are statistical differences between applications and periods in each measurement. Measurements where the variation on spectral reflection of the solid + liquid organic fertilizer applications were the highest and the least were in the blue band region respectively; Measurements 4 and 8, in the green band region; Measurements 5 and 3, in the red band region; Measurements 2 and 8 are in the near infrared band; It was determined during the 2nd and 7th measurement periods. In line with these results, it was concluded that the measurement periods with the highest and lowest variations were determinative in determining plant stress conditions.

Roka (Eruca sativa L.) Yetiştiriciliğinde Katı ve Sıvı Organik Gübre Uygulamalarının Spektral Yansıma Üzerine Etkisi