|Title||Overzichtsdocument: 7 jaar Chrysant op water|
|Author(s)||Vermeulen, Tycho; Blok, Chris; Eveleens, Barbara|
|Source||Bleiswijk : Wageningen University & Research, BU Glastuinbouw (Rapport GTB 1430) - 22|
GTB Teelt & Gewasfysiologie
WUR GTB Gewasgezondheid
GTB Gewasgez. Bodem en Water
|Publication type||Research report|
|Keyword(s)||greenhouse crops - greenhouse horticulture - greenhouses - chrysanthemum - hydroponics - water systems - microbial contamination - inoculation - kasgewassen - glastuinbouw - kassen - chrysanthemum - hydrocultuur - watersystemen - microbiële besmetting - inoculatie|
|Abstract||Over a period of seven years (2009-2016) hydroponic chyrsanthemum cultivation has been developed and
tested in practice. Where the system delivered up to 25% higher yields at smaller scale, the larger systems of
250-300 m2 turned out very sensitive to root infection. Research then focussed to understanding the key factors
that caused the plants to become sensitive. However, where the larger system showed much disease incidence
every summer for three years in a row, at smaller scale the symptoms could not be induced despite application
of extreme cultivation measures.
The studies were the first to apply next generation sequencing to microbial populations in cultivation systems.
The results gave evidence for shifting population dynamics due to inoculation and water temperature. Also the
inoculation with beneficial microbes was found to have a positive effect on recovery of the roots upon infection.
This effect, however, was only found in the research-facility. At larger scale potential beneficial effect could not
prevent significant yield loss.