Waterefficiënte teelt op substraat: Een scenariostudie om het gebruik van aanvullend water te minimaliseren

Research output: Book/ReportReportProfessional

Abstract

Availability of rain water is lower than the total water requirement for several crops, while the use of ground water is under discussion. This creates the need to either find alternative water sources, or decrease the required amount of water. This project investigated with model calculations the options to produce year-round tomatoes without the use of additional water, by decreasing transpiration, regain of transpiration water, or by using water collected by energy production via hydrogen. An increased size rain water basin up to 3000 m3/ha strongly decreases the required amount of additional water. Reflection of sun-light at higher irradiation strength than 600 W/m2 and increasing relative humidity (measures from Het Nieuwe Telen) decrease the water requirement. Measures to regain transpired water (balanced ventilation, active dehumidification and closed greenhouse) also lead to a decreased requirement for additional water. A completely closed greenhouse does not require additional water, but the energy demand for dehumidification increases. Investments in these technologies are only financially interesting when also the picture for energy is right. Hydrogen as fuel has potential, but production of water from this energy source is a by-catch and should not be the main reason for investment.
Original languageDutch
Place of PublicationWageningen
PublisherWageningen Plant Research
Number of pages30
DOIs
Publication statusPublished - 2023

Publication series

NameRapport / Stichting Wageningen Research, Wageningen Plant Research (WPR), Businessunit Open Teelten
No.WPR-1158

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