Evaluation of a radiosity based light model for greenhouse cucumber canopies

Wiechers, Dirk; Kahlen, Katrin; Stützel, Hartmut

doi:10.1016/j.agrformet.2011.02.016

Cited by 35 publications

(24 citation statements)

References 38 publications

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“…In this study, measurements and simulations of light distributions on the different height level were conducted for three cucumber canopy architectures, but 3D light distribution model is used to analyze the light distribution on the individual leaf level and it is essential to veritY the accuracy of light distribution model on individual leaf leve I. W iechers et al [18] verified that light distribution model is suitable to simu late leaf irrad iance on a high level of detail. And it is a Iso need to be verified at photosynthes is modeling on individual leaf level.…”

Section: Discussionmentioning

confidence: 97%

Computational experiments of light distribution and photosynthesis in cucumber (Cucumis sativus L.) canopy

Qian

Zhao

et al. 2012

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications

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Light dis tribution in cucumber canopy affects leaf photosynthesis directly. Scientific computing of light distribution and accurate modeling of canopy photosynthesis is beneficial to improve understanding of the canopy structure and pro vide a quantitative decision bas is for optimal planting spacing design. In this paper, three 3D cucumber canopy models were reconstructed in different planting spacing using measured data. A canopy light distribution calculation model and photosynthesis model were used to calculate light interception and photosynthetic production. Experimental res ults demonstrated that based on the 3D cucumber canopy models and combining light distribution model, the light distribution in different planting spacing canopy can be simulated accurately. Leaf photosynthesis calculation based on the result of light distribution modeling provides an efficient approach to investigate the phys iology of cucumber, and a favorable support for the decisions for optimal planting spacing design.

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Section: Discussionmentioning

confidence: 97%

Computational experiments of light distribution and photosynthesis in cucumber (Cucumis sativus L.) canopy

Qian

Zhao

et al. 2012

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications

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“…LAI) significantly affects the plant development and yield through its effect on light interception. 12 LAI critically affects the plant metabolic activities, biomass production, transpiration and greenhouse gas sequestration. 13 However, the direct measurement of LAI is quite difficult, time consuming and labor intensive.…”

Section: Plant Leaf Area Index (Lai)mentioning

confidence: 99%

Indirect method for measurement of leaf area and leaf area index of soilless cucumber crop

Ch¹,

Singh²,

Singh³

et al. 2018

APAR

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The plant parameters such as leaf area (LA) or leaf area index (LAI) play an important role in understanding photosynthesis, light interception, water and nutrient use and crop growth. A better understanding of the relationships between crop development and environment is thus important. Both LA and LAI can be measured directly by using digital meters (destructive methods) or indirectly using developed regression techniques (non-destructive methods). In the present study, non-destructive methods (regression equations) were developed for estimation of LA and LAI separately. The developed regression equations were used to estimate LA and LAI. Both LA and LAI predictions presented a high precision and accuracy. The developed non-destructive methods for estimation of LA and LAI were found functional for cucumber crop with a significant saving in energy and time.Citation: Singh MC, Singh KG, Singh JP. Indirect method for measurement of leaf area and leaf area index of soilless cucumber crop. Adv Plants Agric Res. and maximum plant height was recorded to be 1.2 m and 3.7 m at 11 and 95 DAT respectively during season.

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“…In het model bestaat het komkommerblad uit 13 afzonderlijke vlakjes (polygonen). De hellingshoek van deze polygonen is overgenomen uit een bestaand bladmodel van komkommer (Wiechers et al 2011;Kahlen, 2007) en via de metingen van de bladhoek in juni aangepast voor het huidige ras Hi-Jack. Tevens is het oppervlak van zowel jong als uitgegroeid blad aangepast op basis van de juni-metingen:…”

Section: Maximalisering En Optimalisering Lichtonderscheppingunclassified

Het winterlicht gewas : proof off principle met komkommer

Kempkes¹,

Meinen²,

Janse³

et al. 2018

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ReferaatIn de winter is licht in Nederland voor vrijwel alle gewassen de limiterende factor voor de productie. In de zoektocht naar het maximaal gebruik maken van het beperkte licht in de wintermaanden is het belangrijk het licht zo optimaal mogelijk om te zetten in gewasproductie. Om de mogelijkheden beter in kaart te brengen, is in aansluiting op de opgedane kennis in het project 'Verbetering lichtinval winterlicht', waar de lichttoetreding door het kasdek is geoptimaliseerd voor de wintermaanden. In dit project is de gewaskant aan bod gekomen.Het werk in dit project is gefinancierd door het onderzoeksprogramma Kas Als Energiebron. Dit onderzoeksprogramma is een samenwerkingsverband tussen het ministerie van Landbouw, Natuur en Voedselkwaliteit en LTO-Glaskracht Nederland.Voor maximalisatie van de lichtonderschepping is een oost-west pad richting de eerste stap. De raseigenschappen van het gekozen komkommer ras vragen door de variatie in bladafmeting tijdens de teelt van groot naar klein een adaptatie van het gewasmanagement aan de veranderende plantvorm in de tijd. Een smalle gootafstand om hier eenvoudig op in te spelen blijkt te veel gewasbeschadiging op te leveren. De beste resultaten kwamen naar voren bij de grootste gootafstand. AbstractIn winter, for almost all crops light is the limiting factor for production. In the search for the maximum use of the limited light in the winter months, it is important to convert the light into crop production as optimal as possible.In order to improve, the knowledge gained in the project "verbetering lichtinval winterlicht", where natural light entrance of the greenhouse roof for the winter period was optimized, in this project the scope was on the crop itself.The work in this project has been funded by the research program Kas Als Energiebron. This research program is a cooperation between the Ministry of Agriculture, Nature and Food quality and LTO-Glaskracht Nederland.To maximize light interception by the crop, an east-west oriented crop direction is the first step. The characteristics of the chosen cucumber variety, due to the variation in leaf size during cultivation from large to small leaves, require adaptation of crop management to the change in plant shape. A narrow trough distance showed a lot of damage of the crop. The best results were shown by the biggest gutter distance. RapportgegevensRapport WPR-725

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Evaluation of a radiosity based light model for greenhouse cucumber canopies

Cited by 35 publications

References 38 publications

Computational experiments of light distribution and photosynthesis in cucumber (Cucumis sativus L.) canopy

Computational experiments of light distribution and photosynthesis in cucumber (Cucumis sativus L.) canopy

Indirect method for measurement of leaf area and leaf area index of soilless cucumber crop

Het winterlicht gewas : proof off principle met komkommer

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