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 536308
Title Klimaat, energieverbruik en bloem temperatuur bij twee Gerbera telers : als onderdeel van het monitoringsproject
Author(s) Vanthoor, B.H.E.; Tsafaras, I.
Source Bleiswijk : Wageningen University & Research, BU Glastuinbouw (Rapport / Wageningen University & Research, BU Glastuinbouw WPR-741) - 38
Department(s) WUR GTB Tuinbouw Technologie
Publication type Research report
Publication year 2018
Abstract This report provides an overview of the Gerbera companies -Holstein Flowers and Zuijderwijk Witzier. Both growers have a blackout screen, energy screen and an illumination system. Holstein Flowers dehumidifies the greenhouse air by means of blowing in heated outside air (using air ducts) and Zuijderwijk Witzier uses a Ventilation Jet system. Both growers screen a lot using a screen gap and they close very rare the screens for 100%. At Holstein Flowers the calculated energy consumption is 22.7 m3/m2/year and at Zuijderwijk 23.8 m3/ m2/year. With a thermal camera, the crop and flower temperatures were measured and they were rarely below the dew point. By carrying out plant sap analyses at 4 growers, a statistical relationship between the plant sap composition and the chance of rot heads (‘rotkoppen’) has been demonstrated. However, it is unknown whether this relationship is also a causal relationship, other factors could also have caused the rot heads. If the mechanism behind the development of Botrytis/rot heads were known, then a grower could - depending on the plant balance, evaporation and the chance of getting Botrytis/rot heads –grow with lower moisture deficits, which could then lead to energy savings
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