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Registros recuperados: 19
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A method for 3D reconstruction of tree crown volume from photographs: assessment with 3D-digitized plants Inra
Phattaralerphong, J.; Sinoquet, H..
Tipo: Journal Article Palavras-chave: MODELISATION TRIDIMENSIONNELLE; CIME D'ARBRE; CANOPEE; METHODE PHOTOGRAPHIQUE CROWN DIMENSION; GAP FRACTION; IMAGE PROCESSING; PERSPECTIVE IMAGE; TREE ANALYZER.
Ano: 2005 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200649e25dcc&uri=/notices/prodinra1/2007/01/
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Caractères de la faune de quelques milieux naturels sur sols ultramafiques en Nouvelle-Calédonie IRD
Chazeau, Jean.
Tipo: Text Palavras-chave: FAUNE; ESPECE ENDEMIQUE; PHYTOPHAGE; PREDATEUR; STRUCTURE TROPHIQUE; CANOPEE; FORET; BIOGEOGRAPHIE; ROCHE ULTRABASIQUE; SOL FERRALLITIQUE FERRITIQUE.
Ano: 1997 URL: http://www.documentation.ird.fr/hor/fdi:010011250
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Deuxième partie. La plante IRD
Raffaillac, Jean-Pierre; Goué, B.; Nedelec, Gabriel.
Tipo: Text Palavras-chave: MANIOC; PRATIQUE CULTURALE; FUMURE; BOUTURE; CROISSANCE; TUBERCULE; CANOPEE; RENDEMENT; ANALYSE DE VARIANCE; DESHERBAGE; SYSTEME RACINAIRE; FACTEUR NUISIBLE.
Ano: 1986 URL: http://www.documentation.ird.fr/hor/fdi:24411
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Estimating sensible heat flux from radiometric temperature over crop canopy IRD
Lhomme, Jean-Paul; Katerji, N.; Bertolini, J.M..
Tipo: Text Palavras-chave: COUVERT VEGETAL; CANOPEE; FLUX THERMIQUE; RADIOMETRE; TEMPERATURE; MODELISATION; MODELE MATHEMATIQUE; CULTURE; MAIS; POMME DE TERRE; ETUDE EXPERIMENTALE.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:010020966
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Examination of Monteith's parameterization of canopy resistance IRD
Lhomme, Jean-Paul; Chehbouni, Abdelghani; Elguero, Eric; Boulet, Gilles.
Tipo: Text Palavras-chave: RELATION CLIMAT COUVERT VEGETAL; TRANSPIRATION; FEUILLE; ARBRE; CANOPEE; SOL; POTENTIEL HYDRIQUE; FACTEUR CLIMATIQUE; LUMIERE; FLUX HYDRIQUE; VARIATION JOURNALIERE; MODELISATION; STOMATE.
Ano: 1997 URL: http://www.documentation.ird.fr/hor/fdi:010023315
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Impact of late-season drought on water relations in a sparse canopy of millet (Pennisetum glaucum (L.) R. Br.) IRD
Do, Frédéric; Winkel, Thierry; Cournac, L.; Louguet, P..
Although millet is known to be adapted to very dry conditions, little is known about its canopy water relations. The control of water loss and dehydration tolerance were studied during the grain filling for two cultivars presumed resistant and sensitive to moisture deficit at this stage. Two experiments were conducted in the dry hot season at Niamey, using crops based on the traditional system of hill sowing at low density : a preliminary trial with low leaf area (index of 0.7 at flowering) ; and a main trial with higher leaf area (index of 1.8) induced by tillering where parameters were recorded at a short time scale. The preliminary trial with small initial leaf area revealed a less apparent leaf water deficit according to leaf water potential and...
Tipo: Text Palavras-chave: PHYSIOLOGIE VEGETALE; CULTIVAR; DEFICIT HYDRIQUE; EVAPOTRANSPIRATION; CANOPEE.
Ano: 1996 URL: http://www.documentation.ird.fr/hor/fdi:010011032
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Life forms of Amazonian palms in relation to forest structure and dynamics IRD
Kahn, Francis.
Two Amazonian terra firme forests present contrasting structures and palm compositions : one is characterized by tall and broadtrunked trees up to 50 m in height and 2.5 m in DBH, and by tall arborescent palms ; the other by more modest-sized trees up to 40 m in height and 1.3 m in DBH, and by abundant acaulescent and smaller arborescent palms. This comparison strongly suggests that forest structure and dynamics influence life forms, palms size, and species diversity. Gap size, which mainly depends on the size of upper-canopy trees, determines the intensity of light reaching the understory and thus influences the development of arborescent palms. In this analysis, acaulescent forms are regarded as an adaptation to forests with small trees and resultant...
Tipo: Text Palavras-chave: FORET DENSE; DYNAMIQUE DE VEGETATION; FORMATION VEGETALE; INVENTAIRE; ARCHITECTURE DE LA VEGETATION; DEVELOPPEMENT; FEUILLE; ARBRE; ARBRE PIONNIER; CANOPEE; RAMIFICATION; PALMIER; LUMIERE JOUR.
Ano: 1986 URL: http://www.documentation.ird.fr/hor/fdi:24058
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Light and fruit quality distribution as influenced by training system in apple tree canopies: assessment from imaging of 3D digitised plants Inra
Sinoquet, H.; Sonohat, G.; Lauri, P.E.; Monney, P.; Potel, A..
Training in fruit trees is aimed at improving light distribution within the tree canopy, because this is expected to improve fruit quality, namely homogenise the distribution of fruit quality parameters. Adult apple trees trained with one, two or three main axes (central leader, Ycare and Drilling, respectively) were 3D-digitised at the leafy shoot scale in 2004 and 2005 in Valais, Switzerland. Fruiting and vegetative shoots were distinguished. The digitising datasets were combined with information at the leaf scale in order to make 3D computer plants. Images of the 3D plants were used to compute the light distribution at the fruiting shoot scale within the tree. Fruit quality parameters like diameter and sugar content were measured on a sample of fruits...
Tipo: Conference Paper Palavras-chave: DIGITALISATION; MAQUETTE 3-D; CANOPEE; LUMIERE.
Ano: 2006 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20082fae8f8a&uri=/notices/prodinra1/2009/01/
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Light modification in a developing silvopastoral system in the UK : a quantitative analysis Inra
Bergez, J.E.; Dalziel, A.J.I.; Duller, C.; Eason, W.R.; Hoppe, G.; Lavender, R.H..
Tipo: Journal Article Palavras-chave: CANOPEE; SYSTEME SYLVOPASTORAL; LUMIERE.
Ano: 1997 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9800008325071630&uri=/notices/prodinra1/2010/09/
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L'organisation comparée de deux forêts d'Amazonie brésilienne IRD
Kahn, Francis.
A comparison of two "terra firme" amazonian forests shows different patterns of spatial organization. In one case multistorey canopy appears to be correlated with a coarse grained mosaic of clearings and with an important lateral heterogeneity in the forest. On the other hand, a fine grained mosaic of clearings and relative homogeneity of the forest seems associated to a closely-packed uniform canopy. These different patterns of spatial organization affect settling and growth conditions of the different species according to their specific light demands. This leads to the question whether the structural organization of the forest does or does not play a role in the distribution of the species as suggested by the case of acaulescent palm-trees in Central...
Tipo: Text Palavras-chave: FORET DENSE; ARCHITECTURE DE LA VEGETATION; DYNAMIQUE DE VEGETATION; SYLVICULTURE; DENSITE; CHABLIS; ETUDE COMPARATIVE; STRUCTURE SPATIALE; CANOPEE; SOUS BOIS; ARBRE GEANT; LIANE; CASTANHAL; FORET HOMOGENE; FORET HETEROGENE.
Ano: 1980 URL: http://www.documentation.ird.fr/hor/fdi:24056
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Mapping maximal canopy transpiration over a mediterranean watershed IRD
Teixera Filho, J.; Rambal, S.; Lacaze, B.; Lointier, Marc.
Tipo: Text Palavras-chave: TELEDETECTION SPATIALE; SATELLITE LANDSAT; EVAPOTRANSPIRATION; CANOPEE; PHOTOSYNTHESE; MODELE NUMERIQUE DE TERRAIN; TRAITEMENT D'IMAGE; BASSIN VERSANT.
Ano: 1996 URL: http://www.documentation.ird.fr/hor/fdi:010004852
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Population dynamics in some rainforests on ultramafic soils in New Caledonia and their impact on patterns of canopy richness IRD
Read, J.; Hope, G.S.; Gaudrie, E.; Jaffré, Tanguy; Veillon, Jean-Marie.
Permanent plots are being established in monodominant and mixed rainforests over a range of altitudes on ultramafic soils in New Caledonia to investigate the factors determining canopy richness. Initial studies are examining the dynamics of the major tree species to assess the role of disturbance and successional change in controlling the canopy richness of these stands. The monodominant stands being investigated are dominated by #Nothofagus$ spp. and have a high species richness in the understorey, despite the low richness of the upper canopy. Many of the species recorded in the understorey, are potentially capable of reaching the canopy, including species that typically occur in the canopy of nearby mixed rainforests. However, the dominant canopy species...
Tipo: Text Palavras-chave: FORET DENSE; ROCHE ULTRABASIQUE; CANOPEE; DYNAMIQUE DE POPULATION; STRUCTURE DU PEUPLEMENT.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:010005650
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Roughness sublayer development in canopy edge flows: streamwise variation in turbulence properties and impact on tree motion Inra
Brunet, Y.; Dupont, S.; Sellier, D..
Tipo: Meeting Paper Palavras-chave: COUCHE LIMITE ATMOSPHERIQUE; COUCHE DE MELANGE; CANOPEE; ECOULEMENT TURBULENT.
Ano: 2006 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200966c12740&uri=/notices/prodinra1/2009/03/
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The concept of canopy resistance : historical survey and comparison of different approaches IRD
Lhomme, Jean-Paul.
Tipo: Text Palavras-chave: EVAPOTRANSPIRATION; RESISTANCE; COUVERT VEGETAL; CANOPEE; MODELISATION; MODELE MATHEMATIQUE; ANALYSE MULTIVARIABLE; METHODE D'ANALYSE; ETUDE COMPARATIVE; SYNTHESE DOCUMENTAIRE.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:010020964
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The distribution of palms as a function of local topography in Amazonian terra-firme forests IRD
Kahn, Francis.
Tipo: Text Palavras-chave: CANOPEE; ARCHITECTURE DE LA VEGETATION; TOPOGRAPHIE; FORET PRIMAIRE; DENSITE; SOUS BOIS; PALMIER; CANOPEE FORESTIERE.
Ano: 1987 URL: http://www.documentation.ird.fr/hor/fdi:23789
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The palm community in a forest of central Amazonia, Brazil IRD
Kahn, Francis; Castro, Aline de.
The palm community in a forest of central Amazonia clearly shows three zones according to the hydromorphic condition of the soil : well-drained soils of the upland forest, poorly-drained soils of a transition zone, and water-logged soils of the seasonal swamp forest. The community is remarkable in three aspects : its size (with 2122 palms/ha, and the highest density on water-logged soils) ; its great diversity (32 species/1.2 ha), which also depends on the hydromorphic condition of the soil ; and its variety of biological forms with characteristic acaulescent palms in the understory, monocaulous and multiple-stemmed palms in the upper understory, and arborescent palms only reaching the canopy in the seasonal swamp forest. (Résumé d'auteur)
Tipo: Text Palavras-chave: INVENTAIRE; FORET; ECOLOGIE; RELATION SOL PLANTE; TOPOGRAPHIE; FORME BIOLOGIQUE; ABONDANCE; DENSITE; ARCHITECTURE DE LA VEGETATION; ARBRE PIONNIER; CANOPEE; PALMIER; DIVERSITE.
Ano: 1985 URL: http://www.documentation.ird.fr/hor/fdi:24057
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Validation of a model for pollen dispersal over heterogeneous landscapes Inra
Dupont, S.; Brunet, Y.; Jarosz, N..
Tipo: Conference Paper Palavras-chave: TURBULENCE; HETEROGENEITE; DISPERSION; PARTICULE; CANOPEE.
Ano: 2005 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0500036115110201&uri=/notices/prodinra1/2008/02/
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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/
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Wind profiles within a cassava field as affected by plant height and leaf area index IRD
N'Guettia, R.Y.; Dea, B.G.; Fargette, Denis; Fauquet, Claude; Fishpool, L..
La vitesse et la direction du vent sont deux facteurs qui affectent la dispersion de la mosaïque africaine du manioc. Une étude a été conduite au champ de 1986 à 1988 pour déterminer l'importance de la hauteur des plantes et l'architecture du feuillage sur la réduction de la vitesse du vent au dessus et dans le couvert du manioc. Les profils verticaux ont une forme logarithmique au-dessus de la canopée alors qu'à l'intérieur du couvert, la forme dépend de la hauteur (H) des plantes, de l'indice foliaire (LAI) et de la distribution de la surface foliaire. La réduction de la vitesse du vent par le couvert de manioc augmente avec la force du vent et peut atteindre 50% à 0,2 H au-dessus de la canopée. Les profils horizontaux montrent que la réduction de la...
Tipo: Text Palavras-chave: VENT; VITESSE; CANOPEE; PROFIL VERTICAL; COUVERT VEGETAL; INDICE FOLIAIRE; PROFIL HORIZONTAL.
Ano: 1996 URL: http://www.documentation.ird.fr/hor/fdi:010008060
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