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Registros recuperados: 6
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An overview of the 1997 activities of the semi-arid land-surface-atmosphere (SALSA) program IRD
Goodrich, D.C; Chehbouni, Abdelghani; Goff, B.; MacNish, B.; Maddock, T.; Moran, S.; Shuttleworth, W.J.; Williams, D.G.; Toth, J.J.; Watts, C.; Hipps, L.H.; Cooper, D.I.; Schieldge, J.; Kerr, Y.H.; Arias, H.; Kirkland, M.; Carlos, R.; Kepner, W.; Jones, B.; Avissar, R.; Bégué, A.; Boulet, Gilles; Branan, B.; Braud, I.; Brunel, Jean-Pierre; Chen, L.C.; Clarke, T.; Davis, M.R.; Dauzat, J.; DeBruin, H.; Dedieu, G.; Eichinger, W.E.; Elguero, Eric; Everitt, J.; Garatuza-Payan, J.; Garibay, A.; Gempko, V.L.; Gupta, H.; Harlow, C.; Hartogensis, O.; Helfert, M.; Holifield, C.; Hymer, D.; Kahle, A.; Keefer, T.; Krishnamoorthy, S.; Lhomme, Jean-Paul; Lo Seen, D.; Luquet, D.; Marsett, R.; Monteny, Bruno; Ni, W.; Nouvellon, Y.; Pinker, R.; Peters, C.; Pool, D.; Qi, J.; Rambal, S.; Rey, H.; Rodriguez, J.; Sano, E.; Schaeffer, S.M.; Schulte, M.; Scott, R.; Shao, X.; Synder, K.A.; Sorooshian, S.; Unkrich, C.L.; Whitaker, M.; Yucel, I..
Tipo: Text Palavras-chave: BILAN HYDRIQUE; ECOLOGIE; BIODIVERSITE; RELATION CLIMAT COUVERT VEGETAL; ATMOSPHERE; FLUX THERMIQUE; TEMPERATURE DE SURFACE; VEGETATION; CROISSANCE; EVAPOTRANSPIRATION; RESSOURCES EN EAU; EAU DE SURFACE; EAU SOUTERRAINE; TELEDETECTION; MESURE IN SITU; VARIATION TEMPORELLE; MODELISATION; ESTIMATION; PROGRAMME DE RECHERCHE; RECHERCHE PLURIDISCIPLINAIRE.
Ano: 1997 URL: http://www.documentation.ird.fr/hor/fdi:010023310
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Estimation of the amount of light intercepted by a plant in natural and artificial environments: Contribution of 3D virtual plants in sunflower and Arabidopsis thaliana Inra
Chenu, K.; Rey, H.; Dauzat, J.; Lecoeur, J..
Light interception is a major contributor to biomass accumulation of crops. Beer's law has beenextensively used to estimate the amount of light intercepted by a plant at canopy level. Thismethod, based on the use of the leaf area index (LAI), is designed for well-developed crops wherethe canopy is assumed to be a turbid medium (Jones, 1992). However this assumption is seldomverified and in most situations canopies are strongly heterogeneous, as for example in perennialcrops such as vineyards and orchards (e.g. Louarn et al., 2007) or in row crops during the firstdevelopmental stages or when leaf senescence occurs. We propose here to test a method based on3D modelling to quantify the local light environment of plants in different situations,...
Tipo: Conference Paper Palavras-chave: INTERCEPTION LUMINEUSE; MAQUETTE 3D; INTERACTION GENOTYPE ENVIRONNEMENT.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010eb516727&uri=/notices/prodinra1/2010/08/
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Scaling-up productivity (NPP) using light or water use efficiencies (LUE, WUE) from a two-layer tropical plantation Inra
Roupsard, O.; Le Maire, G.; Nouvellon, Y.; Dauzat, J.; Jourdan, C.; Navarro, M.; Bonnefond, J.M.; Saint-André, L.; Mialet-Serra, I.; Hamel, O.; Rouzière, A.; Bouillet, J.-P..
Net primary productivity (NPP) is a key driver of ecosystem C balance. Scaling NPP up to larger areas requires indirect methods: (a) for examble epsilon models based on light use efficiency (LUE = NPP/APAR, where APAR is the absorbed photosynthetically active radiation by green elements of canopy, or else models based on water-use-efficiency (WUE = NPP/E, where E = evapo-transpiration); (b) remote sensing tools to estimate the fraction of APAR(fAPAR) from vegetation indexes, or to estimate E. However, LUE and WUE are suspected to vary in space (edapho-climatic conditions, planting density) and time (seasonality, age), which needs to be documented before scaling up. Moreover, the application of this scaling approach to agroforestry systems with a stratified...
Tipo: Journal Article Palavras-chave: PRODUCTION PRIMAIRE NETTE; EFFICACITE DE LA LUMIERE UTILISEE; EFFICACITE DE L'EAU UTILISEE COCOS NUCIFERA L.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20098aa0a84&uri=/notices/prodinra1/2011/05/
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Using 3D architectural models to assess light availability and root bulkiness in coconut agroforestry systems Inra
Lamanda, N.; Dauzat, J.; Jourdan, C.; Martin, P.; Malézieux, E..
Using 3D architectural models to assess light availability and root bulkiness in agro forestry systems. In many parts of the humid tropics, coconut trees are frequently intercropped with food crops, or tree crops such as cocoa. The performance of such systems depends on planting patterns, but also on growing conditions for crops below the coconut canopy throughout the development of the coconut trees. We used a modelling approach providing indicators for assessing above-ground competition for light and below-ground competition for space, in order to optimize intercropping in coconut small holdings. Light transmission and the number of coconut roots in the inter row were assessed in coconut smallholdings from 6 to 60 years old. The modelling of light...
Tipo: Journal Article Palavras-chave: COCOS NUCIFERA.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200735cdd394&uri=/notices/prodinra1/2010/08/
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Using plant architectural models for estimation of radiation transfer in a coconut-based agroforestry system Inra
Mialet-Serra, I.; Dauzat, J.; Auclair, D..
Tipo: Journal Article Palavras-chave: ARCHITECTURE VEGETALE; AFRIQUE OCCIDENTALE.
Ano: 2001 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0400025051104695&uri=/notices/prodinra1/2010/09/
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Virtual trees and light capture: a method for optimizing agroforestry stand design Inra
Leroy, C.; Sabatier, S.; Wahyuni, N. S.; Barczi, J.F.; Dauzat, J.; Laurans, M.; Auclair, D..
In agroforestry systems, the distribution of light transmitted under tree canopies can be a limiting factor for the development of intercrops. The light available for intercrops depends on the quantity of light intercepted by tree canopies and, consequently, on the architecture of the tree species present. The influence of tree architecture on light transmission was analysed using dynamic 3D architectural models. The architectural analysis of Acacia mangium and Tectona grandis was performed in Indonesian agroforestry systems with trees aged from 1 to 3 years. 3D virtual trees were then generated with the AmapSim simulation software and 3D virtual experiments in which tree age, planting density, planting pattern and pruning intensity varied were...
Tipo: Journal Article Palavras-chave: INTERCEPTION LUMINEUSE; MAQUETTE 3D; CANOPEE; EXPERIMENTATION VIRTUELLE ACACIA MANGIUM; TECTONA GRANDIS; LIGHT INTERCEPTION; PLANT ARCHITECTURE; 3D VIRTUAL PLANT; SIMULATION.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009106da4a6&uri=/notices/prodinra1/2010/09/
Registros recuperados: 6
Primeira ... 1 ... Última
 

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