A research project was conducted during winter period, to investigate the effect of a hybrid solar energy
saving system (HSESS) on yield and quality of hydroponically cultivated tomatoes in a heated greenhouse. Water filled transparent cylindrical polyethylene sleeves along with peripheral perforated air
filled tubes consisted the solar energy storage system which was installed in one part of the greenhouse.
There, the tomato plants were cultivated on the sleeves and between the peripheral tubes which acted
also as a gutter for the drainage of the excess nutrient solution (experimental treatment). A second part
of the greenhouse (control treatment) operated only with conventional heating and the tomato plants
were placed on plastic gutters. The use of the hybrid solar energy saving system in the experimental treatment improved the greenhouse microclimate, compared to the control one, leading to higher marketable
and total yield by 10.8% and 7.1%, respectively. Moreover, the tomatoes on the HSESS presented significantly higher marketable fruit number and mean weight by 6.8% and 3.6%, respectively and increased
antioxidant capacity levels by 18.4%.
A research project was conducted during winter period, to investigate the effect of a hybrid solar energy
saving system (HSESS) on yield and quality of hydroponically cultivated tomatoes in a heated greenhouse. Water filled transparent cylindrical polyethylene sleeves along with peripheral perforated air
filled tubes consisted the solar energy storage system which was installed in one part of the greenhouse.
There, the tomato plants were cultivated on the sleeves and between the peripheral tubes which acted
also as a gutter for the drainage of the excess nutrient solution (experimental treatment). A second part
of the greenhouse (control treatment) operated only with conventional heating and the tomato plants
were placed on plastic gutters. The use of the hybrid solar energy saving system in the experimental treatment improved the greenhouse microclimate, compared to the control one, leading to higher marketable
and total yield by 10.8% and 7.1%, respectively. Moreover, the tomatoes on the HSESS presented significantly higher marketable fruit number and mean weight by 6.8% and 3.6%, respectively and increased
antioxidant capacity levels by 18.4%.
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