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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    Quantifying the Feedback Between Rice Architecture, Physiology, and Microclimate Under Current and Future CO2 Conditions
    Sikma, M. ; Ikawa, H. ; Heusinkveld, B.G. ; Yoshimoto, M. ; Hasegawa, T. ; Groot Haar, L.T. ; Anten, N.P.R. ; Nakamura, H. ; Vilà-Guerau de Arellano, J. ; Sakai, H. ; Tokida, T. ; Usui, Y. ; Evers, J.B. - \ 2020
    Journal of Geophysical Research: Biogeosciences 125 (2020)3. - ISSN 2169-8953
    food security - Free-Air CO Enrichment (FACE) - land-atmosphere - microclimate - plant physiology

    To assess the micrometeorological consequences of rice variety choices in relation to rising CO2 associated to climate change, we quantified the interplay between rice architecture, physiology, and microclimate in current (~385 μmol mol−1) and future (~580 μmol mol−1) CO2 microenvironments. Two rice varieties contrasting in canopy structure and physiology were grown embedded in irrigated rice paddies, under elevated CO2 (using a Free-Air CO2 Enrichment facility) and ambient CO2 conditions. The high-yielding indica variety Takanari is more photosynthetically active and characterized by a more open canopy than a commonly cultivated variety Koshihikari. Our results show a strong diurnal interplay between solar angle, canopy structure, plant physiology, and the overlying atmosphere. Plant architecture was identified as a strong determinant of the relation between plant physiology and microclimate that in turn affects the surface forcing to the overlying atmosphere. Takanari was able to maintain lower canopy temperature both in current and future CO2 owing to the greater atmospheric mixing and stomatal conductance than Koshihikari. In the perspective of food security, a shift to such a higher-yielding variety would have consequences on the regional surface energy balance, which subsequently might alter regional weather.

    Seasonal drivers of understorey temperature buffering in temperate deciduous forests across Europe
    Zellweger, Florian ; Coomes, David ; Lenoir, Jonathan ; Depauw, Leen ; Maes, Sybryn L. ; Wulf, Monika ; Kirby, Keith J. ; Brunet, Jörg ; Kopecký, Martin ; Máliš, František ; Schmidt, Wolfgang ; Heinrichs, Steffi ; Ouden, Jan den; Jaroszewicz, Bogdan ; Buyse, Gauthier ; Spicher, Fabien ; Verheyen, Kris ; Frenne, Pieter De - \ 2019
    Global Ecology and Biogeography 28 (2019)12. - ISSN 1466-822X - p. 1774 - 1786.
    canopy density - climate change - forest composition - forest structure - global warming - macroclimate - microclimate - temperature buffering - understorey

    Aim: Forest understorey microclimates are often buffered against extreme heat or cold, with important implications for the organisms living in these environments. We quantified seasonal effects of understorey microclimate predictors describing canopy structure, canopy composition and topography (i.e., local factors) and the forest patch size and distance to the coast (i.e., landscape factors). Location: Temperate forests in Europe. Time period: 2017–2018. Major taxa studied: Woody plants. Methods: We combined data from a microclimate sensor network with weather-station records to calculate the difference, or offset, between temperatures measured inside and outside forests. We used regression analysis to study the effects of local and landscape factors on the seasonal offset of minimum, mean and maximum temperatures. Results: The maximum temperature during the summer was on average cooler by 2.1 °C inside than outside forests, and the minimum temperatures during the winter and spring were 0.4 and 0.9 °C warmer. The local canopy cover was a strong nonlinear driver of the maximum temperature offset during summer, and we found increased cooling beneath tree species that cast the deepest shade. Seasonal offsets of minimum temperature were mainly regulated by landscape and topographic features, such as the distance to the coast and topographic position. Main conclusions: Forest organisms experience less severe temperature extremes than suggested by currently available macroclimate data; therefore, climate–species relationships and the responses of species to anthropogenic global warming cannot be modelled accurately in forests using macroclimate data alone. Changes in canopy cover and composition will strongly modulate the warming of maximum temperatures in forest understories, with important implications for understanding the responses of forest biodiversity and functioning to the combined threats of land-use change and climate change. Our predictive models are generally applicable across lowland temperate deciduous forests, providing ecologically important microclimate data for forest understories.

    The effect of urban green infrastructure on local microclimate and human thermal comfort
    Wang, Y. - \ 2016
    Wageningen University. Promotor(en): Rik Leemans, co-promotor(en): Dolf de Groot; H.J. Wörtche. - Wageningen : Wageningen University - ISBN 9789462576414 - 220
    urban environment - green infrastructure - urban areas - towns - management of urban green areas - microclimate - temperature - trees - ecosystem services - stadsomgeving - groene infrastructuur - stedelijke gebieden - steden - groenbeheer - microklimaat - temperatuur - bomen - ecosysteemdiensten
    Urban heat : natural and anthropogenic factors influencing urban air temperatures
    Theeuwes, N.E. - \ 2015
    Wageningen University. Promotor(en): Bert Holtslag, co-promotor(en): Gert-Jan Steeneveld. - Wageningen : Wageningen University - ISBN 9789462575028 - 157
    microklimaat - warmtestress - luchttemperatuur - stadsomgeving - meteorologie - microclimate - heat stress - air temperature - urban environment - meteorology

    The urban heat island effect is a phenomenon observed worldwide, i.e. evening and nocturnal temperatures in cities are usually several degrees higher than in the surrounding countryside. The main goal of this thesis is to understand the processes that drive the urban air temperature and the urban heat island. First, the effects of street geometry and open water bodies on the diurnal cycle of the urban air temperatures were investigated. This was followed by a search for a universal scaling of the meteorological variables into a diagnostic equation for the daily maximum urban heat island. Finally, it is explored how the daytime urban heat island is influenced by atmospheric boundary-layer dynamics and how it may induce a counterintuitive urban cool island during the morning.

    Weather in the City - How Design Shapes the Urban Climate
    Lenzholzer, S. - \ 2015
    Rotterdam : Nai 010 Uitgevers/Publishers - ISBN 9789462081987 - 216
    microklimaat - steden - stedelijke planning - omgevingspsychologie - stadsomgeving - groene infrastructuur - vegetatie - microclimate - towns - urban planning - environmental psychology - urban environment - green infrastructure - vegetation
    A beautifully designed square where you are almost blown over, an apartment in the city where the summer heat keeps you awake at night. We all know examples of urban and landcape architectural design that doesn’t sufficiently take the urban climate into account. With clear texts and insightful and inspirational illustrations, this book shows how clever urban design can make the city more comfortable. The way we experience the microclimate depends on physical and environmental psychological factors. Based on these factors, the way the basic processes of the urban climate work, and how these can be influenced through spatial planning and urban design are explained. 'Weather in the city. How Design Shapes the Urban Climate' is richly illustrated with photographs, illustrations and many examples from temperate climate regions all over the world.
    Groen voor gezondheid: inrichting en beplantingskeuze
    Hoffman, M.H.A. - \ 2013
    public green areas - microclimate - plantations - urban areas - street trees - outdoor recreation - health - well-being
    Klimaatbestendige beplanting
    Hiemstra, Jelle - \ 2013
    public green areas - plantations - urban areas - microclimate - soil plant relationships - climatic change - resource materials - climate - water harvesting - water holding capacity
    Milieukwaliteit en natuur
    Spijker, Joop - \ 2013
    ecosystems - soil plant relationships - soil quality - flora - fauna - microclimate - soil water - air quality
    Functies van stedelijk groen : Goede plantcombinaties
    Hoffman, M.H.A. - \ 2013
    public green areas - plant communities - management of urban green areas - urban areas - microclimate
    Klimaatverandering en bosbeheer
    Schelhaas, Mart-Jan - \ 2013
    forest administration - climatic change - microclimate - trees - species diversity
    Het weer in de stad : hoe ontwerp het stadsklimaat bepaalt
    Lenzholzer, S. - \ 2013
    Rotterdam : Nai 010 Uitgevers/Publishers - ISBN 9789462080959 - 224
    microklimaat - steden - stedelijke planning - omgevingspsychologie - stadsomgeving - groene infrastructuur - vegetatie - microclimate - towns - urban planning - environmental psychology - urban environment - green infrastructure - vegetation
    Een prachtig aangelegd plein waar je wegwaait, een moderne stadswoning waarin je ’s zomers door de hitte niet kan slapen. Iedereen kent voorbeelden van stedelijke architectuur waarvan het ontwerp onvoldoende rekening houdt met het stadsklimaat. In deze publicatie wordt op begrijpelijke en beeldende wijze uiteengezet hoe uitgekiend stadsontwerp het comfort in de stad kan verhogen. De manier waarop wij het stadsklimaat beleven, is afhankelijk van fysieke en omgevingspsychologische factoren. Aan de hand van deze factoren wordt in dit boek uitgelegd hoe de basisprocessen van het stadsklimaat werken en hoe deze met ruimtelijke ordening en stadsontwerp kunnen worden beïnvloed. Het boek is rijk geïllustreerd met foto’s, principetekeningen en praktijkvoorbeelden. Het is een naslagwerk én inspiratieboek voor iedereen die werkt aan een leefbare stad: opdrachtgevers, beleidsmakers, professionals en studenten in stedenbouw, landschapsarchitectuur en planologie.
    Relatie tussen microklimaat en vaasleven bij roos
    Weel, P.A. van; Eveleens, B.A. ; Keim, E. ; Jacobs, G. - \ 2013
    Bleiswijk : Wageningen UR Glastuinbouw (Rapporten WUR GTB 1253) - 40
    rozen - rosaceae - microklimaat - vaasleven - meting - bloementeelt - teelt onder bescherming - nederland - roses - rosaceae - microclimate - vase life - measurement - floriculture - protected cultivation - netherlands
    Bij snijrozen is getracht een beeld te krijgen van het microklimaat in het gewas met sensoren die de temperatuur van knop en blad meten, aangevuld met metingen van RV en temperatuur van de omringende lucht. Gelijktijdig is bij 2 cultivars, ‘Passion’ en ‘Avalanche Peach’, en op twee plekken in de kas het vaasleven bepaald. Op die manier werd gehoopt een indicatie te vinden voor de invloed van het microklimaat op het optreden van met name botrytis. De meting bleek niet in staat om een direct verband aan te tonen tussen microklimaat en botrytis. Wel werd duidelijk dat de meest waarschijnlijke oorzaak gezocht moet worden in perioden dat niet belicht wordt in koude luchtstromen in de kas als gevolg van kieren in het scherm en van uitstraling van de knoppen naar een koude hemel. Meten van de temperaturen van knop en blad bleek door de kwetsbaarheid van het thermokoppel moeilijk uitvoerbaar, maar kan eenvoudig vervangen worden door een thermische camera. Aanvullend zal er echter een meetmethode ontwikkeld moeten worden om de RV in de grenslaag rondom knop of blad betrouwbaar te kunnen meten voordat een meting van het microklimaat praktische waarde kan hebben bij het voorspellen van de kans op natslag.
    Hoge RV en toch geen ziekten : problemen voorkomen door meer inzicht in microklimaat
    Weel, Peter van - \ 2013
    greenhouse horticulture - protected cultivation - microclimate - temperature - air conditioning - ventilation - environmental control - air flow - relative humidity - energy saving
    Living on the edge: physiological and behavioural plasticity of African antelopes along a climatic gradient
    Shrestha, A.K. - \ 2012
    Wageningen University. Promotor(en): Herbert Prins; Steven Bie, co-promotor(en): Sip van Wieren. - S.l. : s.n. - ISBN 9789461733856 - 135
    antilopen - taurotragus oryx - connochaetes taurinus - aepyceros melampus - klimaatverandering - microklimaat - diergedrag - thermoregulatie - microhabitats - warmtestress - adaptatiefysiologie - antelopes - taurotragus oryx - connochaetes taurinus - aepyceros melampus - climatic change - microclimate - animal behaviour - thermoregulation - microhabitats - heat stress - adaptation physiology

    Climate change, habitat loss and fragmentation individually or synergistically force species to
    live in a sub-optimal condition in terms of climate and resource posing threat to fitness and
    survival of the species. Hence, a very pressing issue for biodiversity conservation at present is
    to understand if species are able to keep pace with these rapidly changing environment
    conditions. To persist with these changes, phenotypic plasticity of behaviour and physiology
    may be the most likely response for long-lived endothermic species because of their longer
    generation times. Therefore, the central aim of this thesis is to investigate intra- and intervariability
    of behavioural and physiological adaptation of range of African antelopes along
    spatio-temporal scales in their natural habitats.
    With the aim to understand the behavioural plasticity of African antelopes to the climatic
    stress, in Chapter 2, I investigated effect of heat stress on diurnal activity pattern of three
    species of antelopes of different body size and feeding types namely, eland Taurotragus oryx
    (≈ 420 kg; mixed feeders), blue wildebeest Connochaetes taurinus (≈180 kg; grazer) and
    impala Aepycerus melampus (≈ 50 kg; mixed feeder) across season and extreme climatic
    condition as indicated by the 10 hottest days. During summer when the heat stress was its
    highest, the heat stress negatively influenced diurnal activity of all the three species.
    However, they shifted the timing of their activity more to the early morning (eland) or late in
    the evening, or both (wildebeest and impala) to avoid heat stress and maximize intake of food
    in a season when forage is abundant. During the spring and the 10 hottest days over the entire
    study period, only the diurnal activity of the larger antelopes (eland and wildebeest) was
    negatively influenced by the heat stress whereas the smaller impala was unaffected.
    Therefore, these large African antelopes apparently suffer from heat stress during spring and
    the extreme hottest days due to their limited capacity to dissipate heat.
    In chapter 3, to understand possible behavioural adaptation of the largest African antelope
    eland against the thermal stress, I investigated the daily and seasonal selection of
    microhabitats based on altitude and microclimate at the southern limits of its distributional
    range. Eland actively selected lower altitudes with warm microclimates during the winter and
    the five coldest days when the ambient conditions were below its thermal neutral zone. In
    contrast, eland did not select higher altitudes or cooler climate when it was warm in the
    summer. However, selection of cooler microhabitats was only evident in the three extremely
    hottest days when the heat stress was close to the upper end of its thermal neutral zone.
    Hence, the eland was able to use diverse topography as a thermal refuge to buffer the adverse
    effect of both cold and very hot condition.
    In the fourth chapter, to study behavioural response of African antelopes to variation in food
    resources which is predicted to exacerbate due to climate change and habitat loss and
    fragmentation, I investigated adaptation of home range sizes of eland, impala (both mixed
    feeders) and wildebeest (a grazer) over time (seasons) and between two climatically
    contrasting areas in South Africa, taking Mapungubwe National Park as the core area and
    Asante Sana Game Reserve as the edge area. This comparative study not only showed the
    home range size of wildebeest in Mapungubwe was larger during the resource-poor dry
    season compared to the resource-rich wet season but their home range size in the core area
    was also a four to seven times larger in the dry season than those in the edge area. In contrast,
    the home range size of impala was 3-14 times larger in the edge area than those in the core
    area. Surprisingly, the home range size of eland neither differs across any season within study
    areas nor between Asante Sana and Mapungubwe, while their average year-round home
    range size in core area was larger than that in edge area. These results suggest that the home
    range size of these African antelope is most likely a response to resource quality and
    availability specific to the local habitat.
    With an attempt to investigate physiological plasticity of African antelopes over a spatiotemporal
    context, in Chapter 5, I compared intraspecific variation of body temperature, as
    measured by amplitude, of the eland, blue wildebeest and impala in the two climatically
    contrasting areas: one with a less seasonal pattern and a mild winter (Mapungubwe National
    Park) and the other with a more seasonal pattern and a long and cold winter (Asante Sana
    Game Reserve). The 24-hour amplitude of body temperature of both mixed feeder (eland and
    impala) did not differ between the study sites, regardless of season. In contrast, the grazer
    (wildebeest) at a less seasonal site exhibited not only a higher variability in the 24-hour
    amplitude of body temperature (Tb)(~4ºC) but also a lower daily minimum body temperature
    by ~2 ºC compare to the normothermic level during the dry season than the wildebeest at a
    seasonal site. Further, the variation in Tb amplitude were influenced both by temperature
    (positive effect) and rainfall (negative effect), a proxy for food availability only among the
    wildebeest from less seasonal site. This suggest that these physiological response of higher
    variability of Tb amplitude and reduced minimum Tb among the wildebeest in Mapungubwe
    is a response to nutritional stress rather than a response to cold climate.
    These behavioural (home range) and physiological (body temperature) response of African
    antelopes to stressful conditions are specific for species and habitats. The smallest impala,
    which is a mixed feeder, maintained homeothermy even though they were exposed to
    stressful habitats by selecting the most productive habitat, i.e., riparian habitat in
    Mapungubwe. In Asante Sana, impala maintained homeothermic status by extending their
    dry season home range size when their principle food Acacia Karoo was not available. The
    largest antelope (eland) maintained homeostasis by ranging over large areas to track
    heterogeneously distributed resources, which is only possible due to their large size and
    ability to cope with lower quality food. Eland in Mapungubwe had larger home range sizes
    compared to Asante Sana which was most probably due to the poor quality of the habitat in
    Mapungubwe. Interestingly, the wildebeest in Mapungubwe did not maintain homeothermy
    particularly in dry season. Not only their amplitude of Tb was much larger (~4ºC) and
    Minimum Tb lowered by 2 ºC compared to normothermic level, they also extended their
    home range size four to seven folds compared to the wildebeest in Asante Sana. This failure
    to maintain homeothermy and extension of home range size was due to nutritional stress and
    therefore these antelopes are living in a physiologically stressful environment. With the
    predicted increase in the frequency and intensity of drought periods in southern Africa due to
    climate change, wildebeest, and other grazers, will likely experience greater nutritional stress
    in the future.
    To conclude, this thesis shows importance of studying behavioural and physiological traits
    among a range of species along temporal and spatial scales in their natural habitats to
    understand the adaptive capacity, therefore sensitivity of animal species. Apparently,
    homeothermic mammals cannot cope well with heat stress, which negatively influence the
    larger ones more than the smaller ones. However, mammals can overcome these stresses by
    shifting time of their activity to cooler parts of the day or by selecting optimal microhabitats
    that minimize absorption of heat at high temperatures or that maximize the absorption of heat
    at low temperatures. The behavioural (larger home range size) and physiological (reduced
    body temperature) response of wildebeest, a grazer to dry season but not that of the mixed
    feeder emphasizes that grazers will become more nutritionally stressed than mixed feeders at
    times of low rainfall. With the predicted increase in low rainfall events in many parts of the
    world and changes in vegetation structure in savannas due to climate change, browsers and
    mixed feeders will be likely to benefit more in future than the ruminant grazers.

    Tevredenheid over kasklimaat in najaar en winter: Droge buitenlucht voorkomt geen afgroeiers, wel vochtblaadjes
    Stijger, H. ; Helm, F.P.M. van der - \ 2012
    Onder Glas 9 (2012)3. - p. 50 - 51.
    teelt onder bescherming - glastuinbouw - alstroemeria - klimaatregeling - luchtstroming - kassen - gewaskwaliteit - proeven - microklimaat - snijbloemen - protected cultivation - greenhouse horticulture - alstroemeria - air conditioning - air flow - greenhouses - crop quality - trials - microclimate - cut flowers
    Hoogenboom Alstroemeria in Nieuwe Wetering teelt op 28.000 m2 jaarrond alstroemeria’s met belichting (8.000 lux). In het kader van Het Nieuwe Telen is hier een praktijkproef met buitenluchtaanzuiging gehouden. Wat was het effect van buitenlucht op het microklimaat en daarmee op het gewas? Dick Hoogenboom en onderzoeker Frank van der Helm vertellen hun ervaringen.
    Het nieuwe telen in lelie : praktijkproef energiezuinig klimaat in de broei van lelie
    Kok, B.J. - \ 2011
    Lisse : Praktijkonderzoek Plant & Omgeving, Bloembollen, Boomkwekerij en Fruit - 34
    lelies - snijbloemen - teeltsystemen - energiebesparing - luchtstroming - milieubeheersing - microklimaat - optimalisatiemethoden - bloembollen - lilies - cut flowers - cropping systems - energy saving - air flow - environmental control - microclimate - optimization methods - ornamental bulbs
    Veel leliekwekers hebben in het najaar, winter en voorjaar blad- en kwaliteitsproblemen en slappe stelen in lelies. De kwaliteitsproblemen bestaan uit grote slappe bladeren die gevoelig zijn voor bladverbranding tijdens de teelt en papierblad na de oogst. Deze problemen worden veroorzaakt door een te hoge RV in het dichte leliegewas en daardoor een slecht microklimaat tijdens de teelt in de kas. Het doel van dit project was om het microklimaat in een leliegewas in najaar, winter en voorjaar te verbeteren door opgewarmde buitenlucht met behulp van luchtslangen in het gewas te blazen. Daarnaast werd onderzocht of hiermee energie is te besparen. Deze teeltwijze wordt “het nieuwe telen genoemd”. “Het nieuwe telen”, hierna te noemen HNT, is een verzamelnaam voor een nieuwe manier van telen om energie te besparen in de glastuinbouw. Het inblazen van droge opgewarmde buitenlucht is hierbij een van de belangrijkste maatregelen. Ook het onderdoor water geven in plaats van beregenen is een manier om de warmtevraag te verminderen. Het inblazen van opgewarmde buitenlucht maakt het mogelijk om het schermdoek ’s nachts gesloten te houden. Een minimum buis in het gewas kan vervangen worden door het inblazen van opgewarmde droge buitenlucht waardoor het microklimaat in het gewas verbetert.
    Environmental changes during secondary succession in a tropical dry forest in Mexico
    Lebrija Trejos, E.E. ; Pérez-Garcia, E.A. ; Meave, J. ; Poorter, L. ; Bongers, F. - \ 2011
    Journal of Tropical Ecology 27 (2011)05. - ISSN 0266-4674 - p. 477 - 489.
    vapor-pressure deficit - rain-forest - plant-communities - deciduous forest - tree seedlings - gas-exchange - costa-rica - microclimate - canopy - light
    Vegetation and environment change mutually during secondary succession, yet the idiosyncrasies of the vegetation effect on the understorey environment are poorly understood. To test whether the successional understorey environment changes predictably and is shaped by the structure and seasonality of tropical dry forests, we estimated basal area and vegetation cover, and measured understorey temperature, light and moisture conditions, in 17 plots forming a 60-y chronosequence and a mature forest. Light and air and soil temperature decreased with time (75-15% of open-sky radiation, 31.7-29.3 °C, and +2.5 °C to -0.5 °C relative to ambient, respectively), whereas relative humidity increased (67-74%). Soil water availability increased with early-successional development (-45 to -1 kPa) but decreased afterwards (to -18 kPa). The first axis of a PCA of the rainy-season environment explained 60% of the variation and was strongly related to air temperature and relative humidity. During tropical dry-forest succession, such factors may be more important than light, the reduction in which is not extreme compared with taller and more vertically stratified wet forests. Seasonality significantly affected the successional environmental gradients, which were marked mainly during the wet season. Environmental heterogeneity was higher in the wet than in the dry season, and larger for resources (light and water) than for conditions (temperature and humidity). The wet-season increase in environmental heterogeneity potentially creates differential growing scenarios; the environmental harshness of the dry season would mostly challenge seedling survival.
    Sturing kasklimaat op basis van modellering van Botrytis
    Körner, O. ; Visser, P.H.B. de - \ 2010
    Gewasbescherming 41 (2010)5. - ISSN 0166-6495 - p. 232 - 235.
    botrytis - microklimaat - vochtigheid - simulatiemodellen - infectie - sporenverspreiding - glastuinbouw - beslissingsondersteunende systemen - energiebesparing - botrytis - microclimate - humidity - simulation models - infection - spore dispersal - greenhouse horticulture - decision support systems - energy saving
    Schade aan kasgewassen door Botrytisaantasting (smet) is één van de belangrijkste knelpunten in de kasteelt. Te hoge luchtvochtigheid en lokale koude plekken met condensvorming zijn de belangrijkste oorzaken van smet. Het instellen van een droog kasklimaat kost veel energie, maar door het gebruik van een waarschuwings- of sturingsmodel is het mogelijk om naast het vermijden van besmetting straks ook energiewinst te behalen ten opzichte van telen zonder model. Met verklarende computermodellen kunnen plantengroei, -kwaliteit en schimmelinfectie berekend worden. De modellen kunnen Botrytis helpen voorkomen door de juiste klimaatinstellingen en de inrichting van de kas.
    Bedrijfsvergelijking geeft inzicht in kansen op Botrytis bij gerbera in de na-oogstfase
    Os, E.A. van; Körner, O. ; Marcelis, L.F.M. ; Slootweg, G. ; Swinkels, G.L.A.M. ; Janssen, Hans ; Tuijl, B.A.J. van - \ 2010
    Gewasbescherming 41 (2010)5. - ISSN 0166-6495 - p. 227 - 231.
    gerbera - snijbloemen - bloementeelt - botrytis cinerea - tuinbouwbedrijven - microklimaat - vochtigheid - temperatuur - agrarische bedrijfsvoering - glastuinbouw - kwaliteit na de oogst - gerbera - cut flowers - floriculture - botrytis cinerea - market gardens - microclimate - humidity - temperature - farm management - greenhouse horticulture - postharvest quality
    Door op twaalf bedrijven in drie meetronden van zes weken wekelijks te oogsten en de gerealiseerde klimaatdata te analyseren bleek dat het microklimaat rond de plant van grote invloed was op het ontstaan van pokken in de naoogstfase. Hoe vochtiger het is, hoe groter de snelheid van Botrytisontwikkeling. Overdag moeten de omstandigheden rond de bloem zodanig zijn dat sporen òf doodgaan (lage vochtigheid, hoge temperatuur), òf niet kunnen hechten (lage vochtigheid) of verspreid worden. ‘s Nachts moet de vochtigheid tussen de bladeren niet te hoog oplopen om groei en ontwikkeling van de schimmel te remmen.
    Designing atmospheres : research and design for thermal comfort in Dutch urban squares
    Lenzholzer, S. - \ 2010
    Wageningen University. Promotor(en): J. Koh; L. Katzschner. - [S.l. : S.n. - ISBN 9789085856603 - 196
    stedelijke gebieden - stedelijke planning - open ruimten - architectuur - ontwerp - microklimaat - stedelijke bevolking - klimaatfactoren - muren - groene gevels - groene daken - urban areas - urban planning - open spaces - architecture - design - microclimate - urban population - climatic factors - walls - green walls - green roofs
    Onderzoek naar de inrichting en verblijfskwaliteit van stadspleinen. Het onderzoek omvat een empirisch gedeelte waarin metingen en interviews op Nederlandse stadspleinen zijn verricht. Daarnaast bevat de studie een ‘ontwerpend onderzoek’ . Dit hield in dat verschillende alternatieven voor een optimaler microklimaat zijn ontworpen en deze met microklimaatsimulaties zijn getest. De resultaten van dit onderzoek vormen gemakkelijk toepasbare ontwerprichtlijnen die ook door de ontwerpers van Nederlandse stadspleinen gebruikt kunnen worden.”
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