Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 538804
Title Natriumgevoeligheid en recirculatie bij Cymbidium in 3 teeltjaren : Behoud plantgezondheid en voorkomen groeiremming bij hergebruik drainwater
Author(s) Kromwijk, Arca; Voogt, Wim; Steenhuizen, Johan; Winkel, Aat van; Mourik, Nico van
Source Bleiswijk : Wageningen University & Research, BU Glastuinbouw (Rapport WPR 735) - 54
Department(s) WUR GTB Teelt & Gewasfysiologie
WUR GTB Gewasgezondheid Bodem en Water
Publication type Research report
Publication year 2017
Abstract In the Netherlands, the government and horticultural industry have agreed to lower the emission of nutrients to the environment. Until recently no drain water was reused in the cultivation of Cymbidium orchids as growers were allowed to discharge the drain water when a sodium level of more than 0 mmol/l was reached. As reusing drain water is a new phenomenon for Cymbidium, growers were faced with a lack of knowledge on the effects of drain water reuse. Therefore a trial was started to investigate the effect of sodium accumulation on crop growth and flowering in two varieties of Cymbidium. Different sodium concentrations are given while maintaining the EC at 0.8. These sodium treatments have a lower “nutritional EC” than the control treatment without sodium. In the first year of cultivation unusual symptoms in the leaves emerged at the two highest levels of sodium resulting in dead leaf tips / leaves. This is potassium deficiency, induced by the lower potassium concentration in the nutritional solution and by inhibition of the potassium uptake by a high sodium concentration. In the first year of cultivation, sodium accumulation had no effect on production as the flower stalks were already induced before or just after the start of the treatments. In the second and third year of cultivation, sodium accumulation reduced production and quality of Cymbidium. This research is funded by the Cymbidium growers in the Netherlands, Product Board for Horticulture, Top Sector Horticulture & Propagation Materials and Foundation Program Fund Greenhouse Horticulture.
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