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Effects of greenhouse covering materials of different colors on plant development in greenhouse cultivation: radish (Raphanus sativus var L.) case

Eğilmez Zeynep Hansa, Atılgan Atılgan

Infrastruktura i Ekologia Terenów Wiejskich

2019

nr III/1

219--234

This thesis was carried out in four greenhouses with arc roofs with a base area of 6 m2 and a side height of 2 m in the experimental area of Isparta University of Applied Sciences, Agricultural Research and Application Center. For this purpose, greenhouse with LED lighting (LED), Red-colored (RG) greenhouse, Blue-colored greenhouse (BG) and greenhouses with transparent covering material (TrG) were used as materials. The study was conducted between February and May 2019. In this study, the effects of different color cover material on the development parameters of radish were determined by measuring the temperature, humidity and solar energy values of the greenhouse. In order to do these measurements, sensors are placed in the greenhouses. Solar energy measurements were taken between 10:00-16:00 hours considering sunshine time. Temperature and humidity measurements were recorded for 24 hours. When the values obtained from TrG, BG, RG and LED greenhouses were examined, it was determined that the highest temperature value of the radish plant in the LED greenhouse during the growing period. Average greenhouse indoor temperature values were found to be between 13°C and 16°C in LED greenhouse, between 6.5°C and 15o C in COG, between 6o C and 14o C in BG and between 6.5°C and 12.2°C in RG. Solar energy values are between 26 and 1053 Wm-2 in LED greenhouse, 21.1 and 856.6 Wm-2 in TrG, 17.9-680.3 Wm-2 in BG and 14.3-633.1 Wm-2 in RG has been determined. In order to examine the growth parameters of radish plant, root weight, height, stem length, length of green parts and root diameter were examined. Root weight was higher in LED greenhouse, plant root length and length of green parts were higher in RG, plant root diameter and weight of green parts were higher in TrG. As a result, it was concluded that the development of radish plant is the worst in the BG in terms of both temperature and radiation energy values. In particular, it was determined that the radish plant in BG appears to be different from the other greenhouse plants. When the development of radish is taken into consideration in four greenhouses, it is concluded that TrG can be recommended for plant root weight, root diameter and green component weight and RG can be recommended for height and stem length. When the developments in the BG were considered, it was concluded that the application of blue color is not suitable for the cultivation of radish.