During the last few decades, greenhouse technology for horticultural crops has focused on retaining optimum conditions within the greenhouse environment that could allow for a compromise between maximum yields and minimum production costs. The aim of this study was to evaluate the effect of three greenhouse covering materials and five harvesting dates on the yield and quality parameters of hydroponically produced tomato fruit, as well as on energy consumption.
Plants had a higher growth rate at early stages for S‐PE cover material, while differences were minimized at later stages. Tocopherol content was the highest for ID‐PE material and harvesting later than 170 days after transplanting (DAT), while sugar content (fructose and glucose) was the highest for S‐PE material and 157 DAT. Organic acid content was the highest at early harvestings, especially for 7‐PE and S‐PE cover materials, while it exhibited decreasing trends at later harvesting dates. Antioxidant properties showed a varied response to cover materials and harvesting dates, while β‐carotene, carotenoids and chlorophylls were the highest for 7‐PE material.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.