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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Impact of microbial variability on food safety and quality
Aryani, D.C. - \ 2016
University. Promotor(en): Marcel Zwietering, co-promotor(en): Heidy den Besten. - Wageningen : Wageningen University - ISBN 9789462577381 - 190 p.
listeria monocytogenes - lactobacillus plantarum - growth analysis - kinetics - growth models - inactivation - heat stress - strain differences - food safety - milk - ham - microbial diversity - food quality - groeianalyse - kinetica - groeimodellen - inactivatie - warmtestress - stamverschillen - voedselveiligheid - melk - microbiële diversiteit - voedselkwaliteit
AlgaeEconomics: bio-economic production models of micro-algae and downstream processing to produce bio energy carriers
Spruijt, J. ; Schipperus, R. ; Kootstra, A.M.J. ; Visser, C.L.M. de - \ 2015
EnAlgae Swansea University - 67
algenteelt - teeltsystemen - productiekosten - biomassa productie - economische modellen - groeimodellen - biobrandstoffen - biobased economy - bioraffinage - algae culture - cropping systems - production costs - biomass production - economic models - growth models - biofuels - biorefinery
This report describes results of work carried out within the EnAlgae project to describe production costs and identify the variables that have most effect in determining future cost prices so that R&D can be focussed on these issues. This has been done by making use of pilots within the EnAlgae consortium and by describing the process in Excel models that have been spread among and discussed with stakeholders active in the field of commercial algae production. The expectation is that this transparency and interaction will lead to an increase of the learning curve to make algae production cheaper and thus supplying more markets.
Investering in kennis en diepgang, hulpmiddel voor teeltoptimalisatie : Groeimodel gerbera klaar voor gebruik
Arkesteijn, M. ; Visser, P.H.B. de - \ 2014
Onder Glas 11 (2014)9. - p. 7 - 9.
glastuinbouw - snijbloemen - gerbera - groeimodellen - registratie - bedrijfsapplicaties - computer software - kastechniek - greenhouse horticulture - cut flowers - growth models - registration - business software - greenhouse technology
Sinds deze zomer is het groeimodel gerbera klaar voor gebruik door Nederlandse telers. Zij kunnen dan zelf met dit hulpmiddel aan de slag om bijvoorbeeld te zien wat hun oogst is op de korte termijn, maar ook teeltbeslissingen of investeringen toetsen.
Gewasfactoren voor beregeningssignaal
Evert, F.K. van - \ 2014
Wageningen : PPO AGV - 8
akkerbouw - aardappelen - beregening - groeimodellen - gewassen, groeifasen - precisielandbouw - arable farming - potatoes - overhead irrigation - growth models - crop growth stage - precision agriculture
Voor de Beregeningswijzer is het nodig over gewasfactoren te beschikken voor aardappel. Het doel van dit werk is deze gewasfactoren te berekenen aan de hand van een gewasgroeimodel voor aardappelen.
Groeimodel Gerbera : eindrapport van teeltproef en ontwikkeling van een groeimodel voor de Gerbera
Visser, P.H.B. de; Helm, F.P.M. van der; Buwalda, F. ; Lagas, P. - \ 2014
Wageningen : Wageningen UR Glastuinbouw (Rapport / Wageningen UR Glastuinbouw 1311) - 66
gerbera - snijbloemen - groeimodellen - proeven - gewaskwaliteit - cultuurmethoden - teeltsystemen - belichting - temperatuur - cut flowers - growth models - trials - crop quality - cultural methods - cropping systems - illumination - temperature
Deze rapportage bevat een verslag van een daglengteproef uitgevoerd bij WUR Glastuinbouw te Bleiswijk en de beschrijving van opbouw en resultaten van het groeimodel gerbera. Het onderzoek, gefinancierd door het Productschap Tuinbouw op verzoek van de landelijke commissie gerbera, had tot doel inzicht te verkrijgen hoe de bloemproductie te maximaliseren zonder in te leveren op bloemkwaliteit.
Improvement of energy and nitrogen utilisation in pork production : genetics and growth models
Shirali, M. - \ 2014
University. Promotor(en): R. Roehe; Johan van Arendonk, co-promotor(en): Egbert Kanis. - Wageningen : Wageningen University - ISBN 9789461738479 - 186
dierveredeling - varkens - dierlijke productie - groeimodellen - genetica - stikstof - excretie - voederconversievermogen - animal breeding - pigs - animal production - growth models - genetics - nitrogen - excretion - feed conversion efficiency

Expansion ofdemand for porkis expected to meet the nutritional requirements of an increasing world population. However, higher levels of pig production are using limited feed resources and are often associated with higher levels of environmental pollution, which provide substantial challenges for pork producers. Therefore, strategies that simultaneously improve feed efficiency and increase production with reduction of environmental pollution of pork production (e.g. per kg product) is necessary. The general aim of the current project was to investigate opportunities for improvement of energy usage and nitrogen excretion at different stages of growth in pigs, and to determine their phenotypic and genetic background in association with other performance traits as well as to provide the basis for developing strategies for improvement of these traits using biological growth models.Feed efficiency was characterised by residual energy intake (REI) as the surplus of energy intake which is not used for protein and lipid deposition along with maintenance throughout growth to 140 kg BW whereas nitrogen excretion was estimated as the difference between nitrogen intake and retention. The results of phenotypic analyses indicate that nitrogen excretion increases substantially during growth of pigs and can be reduced most effectively by improving feed efficiency and to a lesser extent through the improvement of weight gain and/or body composition. Results of genetic analyses indicate that REI as a measure of feed efficiency is highly heritable (h2= 0.44), suggesting great potential for genetic improvement. REI has different genetic background at different stages of growth, suggesting that genetic improvement of REI should consider the stage of growth. In addition, REI explains a large portion of variance in nitrogen excretion, suggesting that selection for lower REI is expected to reduce nitrogen excretion of pork production as well as improve feed efficiency. Genomic analysis showed that different genes are responsible for efficiency of feed utilisation at different stages of growth.The results further suggest that only a small proportion of the variance in REI was explained by variation in feed intake, whereas underlying factors of feed utilisation, such as metabolism and protein turnover, are likely to have great influence on REI. A biological growth model was used to characterize a crossbred population regarding feed energy and nitrogen efficiency in comparison to two purebred population selected for different performances. The results of the biological growth model can be used to developed optimal genetic, nutritional and production strategies, e.g. the impact of reduction in slaughter weight on marginal energy efficiency and nitrogen excretion was estimated. Furthermore, based on the results of the biological growth model, the influence of changes of production traits during growth on energy and nitrogen efficiency can be estimated to optimise genetic strategies. Furthermore, opportunities for further improvement of energy and nitrogen utilisation have been outlined.

Assessing climate change and associated socio-economic scenarios for arable farming in the Netherlands: An application of benchmarking and bio-economic farm modelling
Kanellopoulos, A. ; Reidsma, P. ; Wolf, J. ; Ittersum, M.K. van - \ 2014
European Journal of Agronomy 52 (2014)Part A. - ISSN 1161-0301 - p. 69 - 80.
akkerbouw - klimaatverandering - opbrengsten - groeimodellen - scenario-analyse - alternatieve landbouw - arable farming - climatic change - yields - growth models - scenario analysis - alternative farming - agricultural land-use - integrated assessment - european-community - future - crop - efficiency - impacts - systems
Future farming systems are challenged to adapt to the changing socio-economic and bio-physical environment in order to remain competitive and to meet the increasing requirements for food and fibres. The scientific challenge is to evaluate the consequences of predefined scenarios, identify current “best” practices and explore future adaptation strategies at farm level. The objective of this article is to assess the impact of different climate change and socio-economic scenarios on arable farming systems in Flevoland (the Netherlands) and to explore possible adaptation strategies. Data Envelopment Analysis was used to identify these current “best” practices while bio-economic modelling was used to calculate a number of important economic and environmental indicators in scenarios for 2050. Relative differences between yields with and without climate change and technological change were simulated with a crop bio-physical model and used as a correction factors for the observed crop yields of current “best” practices. We demonstrated the capacity of the proposed methodology to explore multiple scenarios by analysing the importance of drivers of change, while accounting for variation between individual farms. It was found that farmers in Flevoland are in general technically efficient and a substantial share of the arable land is currently under profit maximization. We found that climate change increased productivity in all tested scenarios. However, the effects of different socio-economic scenarios (globalized and regionalized economies) on the economic and environmental performance of the farms were variable. Scenarios of a globalized economy where the prices of outputs were simulated to increase substantially might result in increased average gross margin and lower average (per ha) applications of crop protection and fertilizers. However, the effects might differ between different farm types. It was found that, the abolishment of sugar beet quota and changes of future prices of agricultural inputs and outputs in such socio-economic scenario (i.e. globalized economy) caused a decrease in gross margins of smaller (in terms of economic size) farms, while gross margin of larger farms increased. In scenarios where more regionalized economies and a moderate climate change are assumed, the future price ratios between inputs and outputs are shown to be the key factors for the viability of arable farms in our simulations
Groeimodel aardappel in QMS akkerbouw (97)
Evert, F.K. van; Kempenaar, C. - \ 2013
Wageningen : Plant Research International - 11
akkerbouw - aardappelen - groeimodellen - precisielandbouw - teeltsystemen - arable farming - potatoes - growth models - precision agriculture - cropping systems
Het teeltbegeleidingssysteem QMS Akkerbouw kan gebruikt worden om gemakkelijk en overzichtelijk de groei van gewassen van percelen te vergelijken. Hiertoe dienen de percelen ingetekend te zijn op Mijnakker.nl en dienen kerngegevens in Mijnakker te zijn ingevuld (opkomstdatum, ras, grondsoort, e.d.). Daarnaast dienen telers of adviseurs zelf ook aanvullende gegevens over het perceel toe te voegen (zoals mestgift e.d.) om gericht percelen met elkaar te kunnen vergelijken.
Virtuele roos: experimenteel en modelmatig onderzoek naar gewasopbouw roos
Marcelis, L.F.M. ; Heuvelink, E. ; Wubs-Timmermans, A.M. ; Buck-Sorlin, G.H. ; Heijden, G.W.A.M. van der; Eveleens, B.A. ; Vos, J. - \ 2013
Wageningen : Wageningen UR Glastuinbouw (Rapporten GTB 1234) - 66
bloementeelt - rozen - rassen (planten) - cultuurmethoden - plantenontwikkeling - gewaskwaliteit - groeimodellen - methodologie - floriculture - roses - varieties - cultural methods - plant development - crop quality - growth models - methodology
De gewasopbouw of gewasstructuur is een belangrijke bepalende factor voor productie en kwaliteit bij roos. Met name het uitlopen van een okselknop en en de daarop volgende uitgroei tot bloemscheut hangen nauw samen met de gewasstructuur. De ideale gewasopbouw is niet gelijk voor alle rassen, terwijl nieuwe rassen elkaar in snel tempo opvolgen. Ook de ontwikkelingen op het gebied van robotisering en mobiele teeltsystemen gaan nieuwe eisen stellen aan de gewasopbouw. De gewasopbouw zal zodanig moeten zijn dat het enerzijds voldoet aan de eisen van de techniek en dat anderzijds een optimale productie en kwaliteit geleverd worden. Dit vraagt om keuzen te maken in teeltstrategieën. Gewasopbouw is een complex proces dat niet los gezien kan worden van plantverband, raseigenschappen, snoeistrategie en klimaat. Om hier meer grip op te kunnen krijgen is een aantal proeven uitgevoerd naar verschillen in plantopbouw. Tevens is een gewasgroeimodel ontwikkeld dat de gewasontwikkeling en gewasopbouw (in 3 dimensies) kan berekenen.
Participatory design of farm level adaptation to climate risks in an arable region in The Netherlands
Schaap, B.F. ; Reidsma, P. ; Verhagen, A. ; Wolf, J. ; Ittersum, M.K. van - \ 2013
European Journal of Agronomy 48 (2013)7. - ISSN 1161-0301 - p. 30 - 42.
akkerbouw - opbrengsten - groeimodellen - klimaatverandering - flevoland - arable farming - yields - growth models - climatic change - crop production - change impacts - agriculture - variability - events - europe - model
In the arable farming region Flevoland in The Netherlands climate change, including extreme events and pests and diseases, will likely pose risks to a variety of crops including high value crops such as seed potato, ware potato and seed onion. A well designed adaptation strategy at the farm level can reduce risks for farmers in Flevoland. Currently, most of the impact assessments rely heavily on (modelling) techniques that cannot take into account extreme events and pests and diseases and cannot address all crops, and are thus not suited as input for a comprehensive adaptation strategy at the farm level. To identify major climate risks and impacts and develop an adaptation measure portfolio for the most relevant risks we complemented crop growth modelling with a semi-quantitative and participatory approach, the Agro Climatic Calendar (ACC), A cost-benefit analysis and stakeholder workshops were used to identify robust adaptation measures and design an adaptation strategy for contrasting scenarios in 2050. For Flevoland, potential yields of main crops were projected to increase, but five main climate risks were identified, and these are likely to offset the positive impacts. Optimized adaptation strategies differ per scenario (frequency of occurrence of climate risks) and per farm (difference in economic loss). When impacts are high (in the +2 °C and A1 SRES scenario) drip irrigation was identified as the best adaptation measure against the main climate risk heat wave that causes second-growth in seed and ware potato. When impacts are smaller (the +1 °C and B2 SRES scenario), other options including no adaptation are more cost-effective. Our study shows that with relatively simple techniques such as the ACC combined with a stakeholder process, adaptation strategies can be designed for whole farming systems. Important benefits of this approach compared to modelling techniques are that all crops can be included, all climate factors can be addressed, and a large range of adaptation measures can be explored. This enhances that the identified adaptation strategies are recognizable and relevant for stakeholders.
A regional implementation of WOFOST for calculating yield gaps of winter wheat across the European Union
Boogaard, H. ; Wolf, J. ; Supit, I. ; Niemeyer, S. ; Ittersum, M.K. van - \ 2013
Field Crops Research 143 (2013). - ISSN 0378-4290 - p. 130 - 142.
tarwe - gewasproductie - akkerbouw - groeimodellen - klimaatverandering - wheat - crop production - arable farming - growth models - climatic change - crop growth simulation - fertilizer application - global radiation - models - land - opportunities - agriculture - tropics - system
Wheat is Europe’s dominant crop in terms of land use in the European Union (EU25). Most of this wheat area is sown in autumn, i.e., winter wheat in all EU25 countries, apart from southern Italy, southern Spain and most of Portugal, where spring wheat varieties are sown in late autumn. We evaluated the strengths and limitations of a regional implementation of the crop growth model WOFOST implemented in the Crop Growth Monitoring System (CGMS) for calculating yield gaps of autumn-sown wheat across the EU25. Normally, CGMS is used to assess growing conditions and to calculate timely and quantitative yield forecasts for the main crops in Europe. Plausibility of growth simulations by CGMS in terms of leaf area, total biomass and harvest index were evaluated and simulated yields were compared with those from other global studies. This study shows that water-limited autumn-sown wheat yields, being the most relevant benchmark for the largely rain fed wheat cultivation in Europe, are plausible for most parts of the EU25 and can be used to calculate yield gaps with some precision. In parts of southern Europe unrealistic simulated harvest index, maximum leaf area index and biomass values were found which are mainly caused by wrong values of phenology related crop parameters. Furthermore CGMS slightly underestimates potential and water-limited yields, which calls for a calibration using new field experiments with recent cultivars. Estimated yield gap is between 2 and 4 t ha-1 in main parts of the EU25, is smaller north-western Europe and highest in Portugal.
Participatory design of farm level adaptation to climate risks in an arable region in The Netherlands
Schaap, B.F. ; Reidsma, P. ; Verhagen, A. ; Wolf, J. ; Ittersum, M.K. van - \ 2012
akkerbouw - opbrengsten - groeimodellen - klimaatverandering - modellen - arable farming - yields - growth models - climatic change - models
Currently, most of the impact assessments for farming systems rely heavily on (modelling) techniques that cannot take into account extreme events and pests and diseases and cannot address all crops and are thus not suited as input for a comprehensive adaptation strategy at the farm level. In this study, crop growth modelling with WOFOST is complemented with the Agro Climate Calendar (ACC), a semi-quantitative and participatory approach.
Botrytisvoorspeller in gerbera: Praktijkervaringen met het gebruik van de Botrytisvoorspeller van Wageningen UR Glastuinbouw via LetsGrow.com
Helm, F.P.M. van der; Visser, P.H.B. de - \ 2012
Bleiswijk : Wageningen UR Glastuinbouw (Rapporten GTB 1208) - 54
botrytis - plantenziekteverwekkende schimmels - groeimodellen - gerbera - sierteelt - gewasbescherming - gebruikswaarde - computertechnieken - plant pathogenic fungi - growth models - ornamental horticulture - plant protection - use value - computer techniques
In het project parapluplan Gerbera is een Botrytisvoorspeller ontwikkeld. Dit model kan op de PC van de kweker draaien, maar dit vereist een installatieprocedure die een grote belemmering blijkt voor toepassen van de voorspeller. Kwekers hebben in een Pilotperiode van een half jaar gestest of de weergave van het model in LetsGrow.com een eenvoudiger alternatief is. LetsGrow.com gebruikt de informatie uit de klimaatcomputer dan automatisch voor het draaien van het model. Gedurende de pilotperiode is weinig Botrytis voorgekomen in de kas. Als dit wel het geval was, dan is dit ook berekend/voorspeld. De voorspelling vooraf bleek lastig te interpreteren. Na uitleg over de grafieken in de tussentijdse bijeenkomst realiseerde de kwekers zich de betekenis van de lijnen beter. Kwekers blijken al snel een veilige strategie te voeren, met hoger energieverbruik dan strict noodzakelijk tot gevolg. Aanbevelingen voor verbetering zijn de voorspelling en de realisatie te combineren zodat van het verleden geleerd kan worden voor de toekomst. Beter begrip van het model en de gevolgen van klimaatinstellingen voor de voorspelling, kan leiden tot een klimaat regeling met lager energieverbruik. Voor de kwekers is het wenselijk dat een bandbreedte van gevoeligheid van het model is in te stellen, zodat zij dit aan hun eigen situatie kunnen tunen. Ten slotte zou een SMS bij hoog infectierisico voor de telers gewenst zijn, omdat zij niet elke dag (kunnen) kijken. De waarde van de Botrytisvoorspeller was voor de deelnemers van de pilotgroep groot genoeg om na de pilotfase verder te gaan tegen betaling. Abstract A predcition model for Botrytis in Gerbera is developped by Wageningen UR greenhouse horticulture. The installation of the software and separate interface from regular climate control evaluation have appeared to be tresholds for adapting the model in everyday practice. A pilotgroup of 10 growers have used the digital platform of LetsGrow.com for data exchange and consulting the model in combination with regular climate control evaluation. Little incidence of Botrytis has occurred during the pilotperiod, although climate was favourable for Botrytis at certain periods during the pilot. One case of Botrytis occurred and was predicted by the model. The interpretation of the data and figures appeared to be more complex than expected. Only after presentation of interpretation of the graphs growers realised how to translate the information to their situation and climate control. Growers tend to use the model to be on the safe side, however it could results in higher use of energy than needed. Growers would like to be able to adjust the sensitivity of the model to tune the model to their specific situation. Also an SMS service when risks are high would is expected to be helpful. Growers still did not use the model on a daily basis, although tresholds were lower. The value was high enough for growers of the pilot to continue using the model and pay for it after the pilotperiod was over.
Assessing climate change effects on European crop yields using the Crop Growth
Supit, I. ; Diepen, C.A. van; Wit, A.J.W. de; Wolf, J. ; Kabat, P. ; Baruth, B. ; Ludwig, F. - \ 2012
Agricultural and Forest Meteorology 164 (2012). - ISSN 0168-1923 - p. 96 - 111.
gewasproductie - akkerbouw - groeimodellen - kooldioxide - bedrijfssystemen - klimaatverandering - crop production - arable farming - growth models - carbon dioxide - farming systems - climatic change - atmospheric co2 concentration - daily precipitation models - solanum-tuberosum l. - wind-speed analysis - change scenarios - daily rainfall - carbon-dioxide - brassica-napus - part ii - simulation
Climate change impacts on potential and rainfed crop yields on the European continent were studied using output of three General Circulation Models and the Crop Growth Monitoring System in combination with a weather generator. Climate change impacts differ per crop type and per CO2 emission scenario. Crops planted in autumn and winter (winter wheat) may benefit from the increasing CO2 concentration. Rainfall is sufficient and if the CO2 concentration increase is high, yields may increase up to 2090. If the CO2 increase is less, increasing temperatures result in declining or stagnating yields after 2050. Crops planted in spring (potato, sugar beet) initially benefit from the CO2 increase, however as time progresses the increasing temperatures reduce these positive effects. By the end of the century yields decline in southern Europe and production may only be possible if enough irrigation water is available. In northern Europe depending on the temperature and CO2 concentration increase, yields either stagnate or decline. However in some of the cooler regions yield increase is still possible. Crops planted in late spring and summer (maize) may suffer from droughts and high temperature in summer. By the end of the century, depending on the temperature rise, crop yields decline almost everywhere. If the temperature increase is less only in north western Europe yields remain stable.
Handleiding Paprika model “Cultivista” - Project Topmodel4all / 2010-2011
Driever, S.M. ; Kromdijk, J. - \ 2011
Bleiswijk : Wageningen UR Glastuinbouw (Rapporten GTB 1145) - 29
glastuinbouw - cultuurmethoden - groeimodellen - plantenontwikkeling - capsicum - beslissingsondersteunende systemen - computer software - kwekers - greenhouse horticulture - cultural methods - growth models - plant development - decision support systems - growers
Abstract NL Deze handleiding is bedoeld voor telers die aan de slag willen met het paprika model “Cultivista”. Er wordt uitgelegd hoe met het interactieve paprika model “Cultivista” kan worden gewerkt. De installatie van het model en de verschillende in te voeren gegevens (inputs) van het model worden besproken. Vervolgens worden de werking van het model en de onderdelen van de interface besproken. Tevens worden de voorwaarden voor mogelijke automatisering van de inputs en het oplossen van de meest voorkomende problemen besproken. Abstract UK This manual is meant for growers who would like to work with the sweet pepper growth model “Cultivista”. This manual explains how the model works, how to install the model and which inputs are used. Furthermore, the different parts of the interface are explained. Finally, the conditions for automation of the inputs and troubleshooting of the most common problems are discussed.
Freesia groeimodel: Ontwikkeling van een groeimodel voor gebruik door telers
Labrie, C.W. ; Visser, P.H.B. de; Buwalda, F. ; Helm, F.P.M. van der - \ 2011
Bleiswijk : Wageningen UR Glastuinbouw (Rapporten GTB 1075) - 35
freesia - groeimodellen - grensvlak - droge stof - groei - kwekers - klimaatfactoren - teelt onder bescherming - nederland - growth models - interface - dry matter - growth - growers - climatic factors - protected cultivation - netherlands
Abstract Wageningen UR Greenhouse Horticulture conducted in close cooperation with the Dutch freesia sector research on the effects of climate on dry matter production of Freesia plants. The relationships were established on the basis of photosynthesis, growth and climate data measured in greenhouses of Freesia growers. The relationships were incorporated in a dynamic growth model that correctly simulated the dry matter growth in a series of trials. A user-friendly interface was satisfactorily developed interactively with a number of Freesia growers. The model can be used by growers to find the most optimal combination of climate factors for Freesia growth at given plant age and greenhouse settings.
Computermodel helpt haakgroei freesia te verbeteren (interview met Pieter de Visser en Fokke Buwalda)
Petter, M. ; Visser, P.H.B. de; Buwalda, F. - \ 2011
Vakblad voor de Bloemisterij 66 (2011)16. - ISSN 0042-2223 - p. 44 - 45.
snijbloemen - freesia - computertechnieken - groeimodellen - bloemstelen - optimalisatiemethoden - cut flowers - computer techniques - growth models - pedicels - optimization methods
Met een gratis groeimodel voor freesia kunnen kwekers zelf en op een gebruiksvriendelijke manier hun teeltstrategie controleren. Voor het sturen en plannen van de teelt is echter een verdere ontwikkeling van het model nodig.
Koppeling groeimodellen en logistieke modellen voor optimale sturing, Thema: Innovatieve tuinbouw BO-12.03-006-005
Marcelis, L.F.M. ; Noort, F.R. van - \ 2011
S.n.
glastuinbouw - teelt onder bescherming - plantenkwekerijen - logistiek - planning - monitoring - groeimodellen - computertechnieken - agrarische bedrijfsplanning - greenhouse horticulture - protected cultivation - nurseries - logistics - growth models - computer techniques - farm planning
Onderzoek naar het ontwikkelen en koppelen van groeimodellen met logistieke modellen bij potplantenkwekerijen om teelt en logistiek beter op elkaar te kunnen afstemmen.
Champignons op Compost of Vloeibare Voeding?, Thema: Innovatieve tuinbouw BO-12.03-006-001.01
Sonnenberg, A.S.M. ; Baars, J.J.P. ; Hendrickx, P.M. - \ 2011
S.n.
substraten - compost - cultuurmethoden - innovaties - groeimodellen - voedingsonderzoek - alternatieve methoden - substrates - composts - cultural methods - innovations - growth models - nutrition research - alternative methods
Onderzoek naar het huidige teeltsysteem bij champignons, maar ook naar alternatieve systemen. Concrete activiteiten zijn het meten en analyseren van alle relevante parameters in het huidige systeem (Input-Output Project), het analyseren van deze data om het systeem te begrijpen en te verbeteren en het ontwikkelen van teeltmodellen voor voedingsonderzoek.
40 kg Paprika
Eveleens-Clark, B.A. ; Lagas, P. ; Driever, S.M. ; Zwinkels, J. ; Vaate, J. Bij de; Kaarsemaker, R.C. - \ 2010
Bleiswijk/Wageningen/Delfgauw : Wageningen UR Glastuinbouw/DLV Plant/Groen Agro Control - 87
capsicum - gewasproductie - productiegroei - glasgroenten - tuinbouw - assimilatie - groeimodellen - teeltsystemen - brix - diffuus glas - snoeien - teelt in rijen - crop production - production growth - greenhouse vegetables - horticulture - assimilation - growth models - cropping systems - diffused glass - pruning - alley cropping
Rapport beBestaand uit de volgende onderdelen: 1. Een kasproef, waarin het doel was de productie te verhogen door een combinatie van maatregelen; diffuus glas, verneveling en gewashandelingen 2. Praktijktoepassing en ontwikkeling van een plantmodel dat zetting voorspelt 3. Toetsing van een nieuwe methode om beschikbaarheid van assimilaten voor zetting te meten
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