DEVELOPMENT OF STRATEGIES FOR HYDROPONIC CULTIVATION IN VERTICAL SYSTEMS

K.-J. Bergstrand, S. Hultin
Urban horticulture in vertical systems seems to be a feasible solution to supply a growing urban population with healthy, locally grown vegetables and to utilise waste products such as heat, CO2 and nutrients from cities. However, growing vegetables in such systems is somewhat different than in conventional planar greenhouse systems, with respect to climate and light interception. As part of a completely novel concept, a system for growing Asiatic vegetables (pak choi, mizuna) in a continuous, pumice-based hydroponic system was developed. Factors such as suitable nutrient solutions, cultivars and lighting strategies were evaluated with respect to their influence on production time and product quality, with the aim of producing 300 g pak choi plants within a 35 day cultivation period. The system comprised 0.75-L containers with pumice intended to be reused several times, with the seeds sown directly in the pumice. Nutrient solution was supplied via capillary uptake. Supplementary lighting (HPS/LED) was used to obtain a daily light integral of 12 mol m-2. Biometric measure¬ments were performed on the plants and climate parameters in the stand and nutrient uptake were monitored. It was concluded that the basic system design was feasible from a crop related perspective, with an overall cropping time of around 42 days.
Bergstrand, K.-J. and Hultin, S. (2014). DEVELOPMENT OF STRATEGIES FOR HYDROPONIC CULTIVATION IN VERTICAL SYSTEMS. Acta Hortic. 1034, 149-156
DOI: 10.17660/ActaHortic.2014.1034.17
https://doi.org/10.17660/ActaHortic.2014.1034.17
artificial lighting, light emitting diode, nutrient solution, pak choi, pumice, vertical farming
English

Acta Horticulturae