Evaluation of two hydroponic vertical planting systems for indoor living walls under different exposure to light
Living walls out or/and inside buildings are among the most innovative urban greening techniques. The present paper presents the evaluation of the efficiency of two indoor closed loop hydroponic vertical planting systems. The experiment was implemented at the TEIEP's Floriculture and Landscape Architecture building at Arta, Greece. Two replications of two systems (one facing south and one facing north) were used. Each system was fixed on a 2 (height) × 1 (width) m metal frame. The first system used two layers of fabric, sewn in such way as to form pockets which were filled with perlite 0-5 mm, while the second used PVC tubes, filled with the same type of perlite. Both layouts were set in order for the same quantity of substrate to be available per plant. For each treatment, an independent closed-loop hydroponic system was used. Eight plant species were evaluated: Epipremnum aureum, Syngonium podophyllum, Tradescantia pallida, Tradescantia sillamontana, Tradescantia zebrine, Chlorophytum comosum, Hedera helix and Plectranthus australis. During the 4 months experimental period, several parameters were monitored such as air temperature and relative humidity, solar radiation intensity, water consumption, substrate moisture and chemical characteristics (pH and EC) of the nutrient solution. The evaluation was based on the growth of the plants and in this framework root and shoot dry weights were measured before planting and after the end of the experiment. Both hydroponic systems provided similar results regarding growth of plants but tubular PVC planters with southern orientation presented the best results.
Katsoulakou, S., Lampraki, E., Tsirogiannis, I.L., Papakonstantinou, K., Baltzoi, P. and Karras, G. (2017). Evaluation of two hydroponic vertical planting systems for indoor living walls under different exposure to light. Acta Hortic. 1189, 291-296
green wall, vertical garden, fabric system, tube system