Abstract:

The spectral reflection characteristics of plants vary throughout the vegetation period by the effect of the plant’s nutrient concentrations, stress and other factors. Roka (Eruca sativa L.) is intense fertilization to increase productivity in leafed vegetables and to provide the consumer's preferred dark green leaf color in a short time. This study has studied the effects of solid and liquid organic fertilizer applications applied from the base in increased doses to the roca plant on the energy use of the electromagnetic spectrum in a different wavelength range. The work is carried out in a controlled greenhouse environment according to the test pattern. During the plant growth period, solid organic fertilizer (KOG) and liquid organic fertilizer (SOG) were applied in different doses. In this process, spektroradiometric measurements were performed by manual spektroradiometers in the wavelength range of 330-1075 nm of the electromagnetic spectrum.  The research has found that there are statistically differences between applications and periods in each measurement. The measurements with the most and the least variation that solid + liquid organic fertilizer applications make up on spectral reflection are in the blue band area respectively; the measurements 4 and 8 are in the green band area; the measurements 5 and 3 are in the red band area; the measurements 2 and 8 are in the near infrared band area; the measurements 2 and 7 are in the measurement periods. According to these findings, the measurement periods in which the variation is the most and the least are determining in the detection of plant stress conditions.

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