Recirculatie bij snij-amaryllis (Hippeastrum) in drie teeltjaren (2013-2015) : Behoud plantgezondheid en voorkomen groeiremming bij hergebruik drainwater

In the Netherlands most crops grown in greenhouses reuse drain water. However, in the cultivation of amarylliscut flowers (Hippeastrum) little drainage water is being reused so far because of strong suspicions of inhibitorysubstances in the drainage water. To reduce the emission of nutrients to the environment an experiment wasstarted on request of the amaryllis growers. In a greenhouse experiment drainage water of amaryllis was treatedwith advanced oxidation and reused. This was compared with the reuse of drainage water treated with an UVdisinfector and a control treatment without the reuse of drainage water. In three years of cultivation, there wasno difference in production and no adverse effects were seen in crop growth. This research was funded by theDutch amaryllis growers, the ‘Topsector Tuinbouw en Uitgangsmaterialen’, the Product Board for Horticulture, theproject ‘Samenwerken aan Vaardigheden’ and Koppert