To reverse the water deficit problems induced by the variable and changing climate, a new agronomic approach was developed to produce tomatoes (Solanum lycopersicum L.) in a sustainable way by using a special solar collector greenhouse consisting of finned tube heat exchangers on the quantity and quality of fruit, water use efficiency and water balance. Changing microclimatic conditions in this system positively affected plant physiological processes, resulting in an increased total yield of up to 31.8%, an increased water use efficiency (+81%) and a decreased total water uptake within the crop of up to 29% when compared with a commercial greenhouse. Based on the above-mentioned results, it was concluded that a collector greenhouse can be regarded as a useful tool to increase the yield as well as to reduce amounts of fresh water, and the condensation water can safely be reused in hydroponic systems.

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Renewable energy
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Greenhouse crop management