Within the platform sustainable horticulture, governments and industry agreed to pursue a virtually emission-free cultivation under glass in 2027. Until recently no drain water was reused in the cultivation of Cymbidium as growers were allowed to discharge the drain water when a sodium level in the drainage water of more than 0 mmol / l was reached.
As reusing drain water is a new phenomenon for Cymbidium, growers are now faced with a lack of knowledge on the effects of drain water reuse.
A trial on a commercial nursery was started in July to investigate the effect of Na accumulation on crop growth and flowering in two varieties of Cymbidium. Three different sodium concentrations are given while maintaining the EC at 0,8, and these are compared with a control treatment without sodium and an EC 0.8. In a fifth treatment extra sodium on top of the normal EC-gift of 0.8 is given.
During the study, drain water samples are analyzed and crop growth, crop production and the sodium uptake by the plants is measured.