Applying nutrient dynamics to adjust the nutrient-water balance in hydroponic crops. A case study with open hydroponic tomato crops from Barcelona
| Autor: | Xavier Gabarrell, Santiago Gassó, David Sanjuan-Delmás, Pere Muñoz, Alejandro Josa, Joan Rieradevall |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció, Universitat Politècnica de Catalunya. GRIC - Grup de Recerca i Innovació de la Construcció |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Fertigation chemistry.chemical_element Enginyeria agroalimentària [Àrees temàtiques de la UPC] Hidroponics Horticulture 01 natural sciences Adobs -- Aspectes ambientals Crop 03 medical and health sciences Water balance Nutrient Tillage--Environmental aspects Hidropònia Industrial ecology Substance flow analysis business.industry Material flow analysis Phosphorus Fertilizers--Environmental aspects Agricultura -- Aspectes ambientals Nutrient budget 030104 developmental biology Agronomy chemistry Agriculture Environmental science Eutrophication business Substrate 010606 plant biology & botany |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname |
| Popis: | Background Global food production systems generate impacts such as eutrophication, caused by nutrient run-off from agricultural exploitations and exacerbated by climate change. Hydroponic cultivation methods are common in Mediterranean areas, although there is a gap in the literature with regard to their study. This study aims to fill that gap, by assessing nutrient flows in hydroponic crops. Results The results showed that most of the nutrients were drained with the leachates (51% on average), a figure which could be lower, if the nutrient supply were adjusted to the needs of the plants or if (closed hydroponic) nutrient recirculation were implemented, without compromising the nutrient uptake of the plant. Moreover, the study revealed that a significant quantity of nutrients was retained in the substrate (perlite) during the crop, reaching average values of 5% of incoming calcium, 6% of nitrogen, and 7% of phosphorus. In the case of phosphorus and calcium, a regression model is presented for the estimation of their retention in hydroponic crops. Conclusions Although further studies will be needed to confirm the above trends, the study makes a significant contribution to understanding the metabolism of nutrients in hydroponic crops and to finer adjustments of the nutrient balance. |
| Databáze: | OpenAIRE |
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