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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    Glass foam granulate as growing medium for tomato and cucumber
    Blok, C. ; Winkel, A. van; Chizhmak, S. - \ 2011
    In: Proceedings of the International Symposium on growing media and composting, Charlotte, NC, USA, June 1- 5, 2009.. - ISHS - ISBN 9789066057333 - p. 215 - 222.
    Glass foam granulate was evaluated for use as a horticultural rooting medium with laboratory tests and cultivation experiments. The laboratory tests included moisture characteristics, rehydration rate and pH buffering analyses. Cucumbers and later on tomatoes were propagated in rockwool propagation cubes and planted on slabs of Growstones™ glass foam granulate. They were compared with cucumber respectively tomatoes grown on rockwool slabs. Lab results show that the coarse nature of the glass foam granulate (0.5-5 cm) limits the maximum moisture content to 50%. The rehydration rate is very high, reaching more than 80% of container capacity in 5 min. The tested material initially reacts with water, raising the pH to over 10 pH units. Based on lab results a recipe for rinsing the material prior to cultivation was calculated. Cucumber cultivation results show an equal production to plants grown on rockwool. The first yield on glass foam granulate is 1-2 days earlier. The susceptibility to Pythium is significantly lower than on rockwool. The wax layer on cucumbers grown on glass foam granulate is perceptibly thicker as consequence of an elevated silicon level of 0.25 to 1.6 mmol L-1 in the slab solution. Tomatoes on glass foam granulate show smaller stem diameters and recovered faster from blossom end rot. Yield levels on glass foam granulate and rockwool are equal. In conclusion growing on glass foam granulate is equally productive as rockwool growing. The material is drier and thus less susceptible to Pythium and more generative in nature. Glass foam granulate can be irrigated with small and frequent irrigation cycles and the material must be rinsed with an acid solution before planting. Small amounts of silicon are released into the nutrient solution.
    Verbetering van de lichtonderschepping in een tomatengewas door aanpassing van de rijstructuur: Effecten van de rijstructuur op lichtverdeling, fotosynthese en productie
    Dueck, T.A. ; Nederhoff, E.M. ; Nieboer, S. ; Scheffers, C.P. ; Steenhuizen, J.W. ; Chizhmak, S. ; Uenk, D. ; Sarlikioti, V. ; Visser, P.H.B. de - \ 2010
    Wageningen : Wageningen UR Greenhouse Horticulture (Rapport GTB 1029) - 46
    solanum lycopersicum - tomaten - kasgewassen - teelt onder bescherming - cultuurmethoden - licht - interceptie - ruimtelijke verdeling - adaptatie - positie - effecten - fotosynthese - solanum lycopersicum - tomatoes - greenhouse crops - protected cultivation - cultural methods - light - interception - spatial distribution - adaptation - position - effects - photosynthesis
    Doel van dit project was te onderzoeken wat het effect is van de rijstructuur op de lichtverdeling en fotosynthese van een tomatengewas, en de effecten daarvan op de productie. Ook werd gekeken of de bladstand en de fotosynthesecapaciteit van de bladeren zich aanpassen aan wijzigende lichtverdeling. Tevens werd de hypothese getest of alternatieve vormen van tussenplanten zouden leiden tot lagere verdamping en dus tot energiebesparing. Verder is gekeken naar het effect op productie van twee substraten, namelijk kokosmatten type ‘Profit’ van Van der Knaap, en steenwolmat type ‘Master Dry’ van Grodan.
    Chrysantenteelt in smalle goten : Teeltexperimenten met verschillende substraten en gootaanpassingen
    Blok, C. ; Winkel, A. van; Lagas, P. ; Chizhmak, S. - \ 2008
    Bleiswijk : Wageningen UR Glastuinbouw - 30 p.
    The horticultural potential of KRONO wood fiber products
    Winkel, A. van; Blok, C. ; Chizhmak, S. - \ 2008
    Bleiswijk : Wageningen UR Glastuinbouw - 9 p.
    Effiëntie van groeilicht gedurende het etmaal
    Dieleman, J.A. ; Meinen, E. ; Warmenhoven, M.G. ; Steenhuizen, J.W. ; Uenk, D. ; Chizhmak, S. ; Visser, P.H.B. de - \ 2007
    Wageningen : Wageningen UR, Glastuinbouw (Nota / Wageningen UR, Glastuinbouw 490) - 44
    rozen - licht - fotosynthese - bloementeelt - belichting - efficiëntie - glastuinbouw - roses - light - photosynthesis - floriculture - illumination - efficiency - greenhouse horticulture
    Verslag van onderzoek naar de vraag of bij rozenteelt in de kas de efficiëntie van de belichting gedurende elk uur van de dag en nacht even hoog is.
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