Greenhouse activities are increasing in the Mediterranean region and constitute a large portion of agriculture. Climatic conditions can be controlled in greenhouse activities. Wind, one of the most important parameters, is less effective inside the greenhouse than outside through natural means. The study was conducted in experimental greenhouses on the Alanya Alaaddin Keykubat University campus. Three experimental greenhouses were 3x12 m in size. The first greenhouse featured a transparent cover material (CG), the second utilized a blue cover material (BG), and the third was equipped with a blue cover material and inhabited by bumblebees (BBG). Following these treatments, parameters such as plant width, length, weight, stem diameter, total yield, marketable yield, average fruit weight, and leaf chlorophyll content were determined. It was determined that the BBG greenhouse achieved the highest yield, plant height, and fruit equivalent diameter values. Furthermore, the BBG variant achieved the lowest fruit firmness values. This is thought to be due to its faster development and faster maturity compared to other greenhouses. Therefore, it has been determined that both the blue color and bumblebees positively affect tomato plant development parameters in the BBG greenhouse. Therefore, we believe that implementing good agricultural practices to achieve higher yields is ...
In Türkiye, greenhouses without regular heating typically begin cultivation in March due to ecological reasons. However, low temperatures that occasionally occur during these months negatively impact cultivation. This study aimed to monitor inside climate parameters in high-tunnel greenhouses and evaluate measures to be taken. To this end, inside and outside temperatures, relative humidity, dew point temperature, canopy surface temperature, water condensation on the canopy's inner surface, light intensity, solar radiation, and photosynthetic active radiation were measured in March in the high-tunnel greenhouse and evaluated for cultivation. Data logger measurements revealed outside temperature and relative humidity values ranging from -5.7 to 11.0 °C and 53.4% to 91% throughout the trial. Inside temperature and relative humidity values ranged from -4.7 to 27.7 °C and 52.4% to 85.9%. Considering the low temperatures and high relative humidity values encountered during these periods, heating and ventilation of greenhouses becomes essential. Otherwise, the cover surface temperatures will drop below the dew point, causing condensation. Depending on the difference between inside and outside temperatures, water condensing on the inner surface of the cover can reach up to 90.1 g/m²/h. Furthermore, this condensed water on the cover surface has been determined to promote fungal diseases and reflect 67% ...
In regions with Mediterranean climates, high indoor temperatures, particularly during the summer months due to high solar radiation, limit plant growth in greenhouses. Due to the inadequacy of natural ventilation and shading practices commonly used to reduce indoor temperatures during these months, evaporative systems have become widely used in recent years. However, in regions where water is scarce, the high water volumes required for evaporative cooling are an issue that greenhouse operators should not overlook. The aim of this study was to determine the cooling effect, relative humidity effect, cooling efficiency, and water consumption of fan and pad cooling systems under Mediterranean climate conditions. For this purpose, measurements were taken in a Gothic-roofed greenhouse between June and September, when temperatures are high. The pad area used in the greenhouse was 7.5 m2, the water flow rate was 10 L per minute per meter of pad, and the air change rate was 0.066 m3m-2s-1. The average cooling effect, relative humidity effect, cooling efficiency, and water consumption in June were determined as 7.9 °C, 19.4%, 60.7%, and 9.82 L·m-2, respectively. In July, these figures were 5.6°C, 21.9%, 52.1%, and 9.73 L·m-2, respectively; in August, 5.4°C, 14.5%, 50.9%, and 10.2 L·m-2; and in ...
