|
|
|
| Registros recuperados: 22 | |
|
| |
|
| |
|
| |
|
| |
|
|
| Lauri, P.E.; Costes, E.; Regnard, J.L.; Brun, L.; Simon, S.; Monney, P.; Sinoquet, H.. |
| Orchard planting systems are often associated with tree shape management which has direct and practical implications on training and pruning strategies. The objective of horticultural practices is to reach the required height and shape as fast as possible and maintain the tree framework in time and space. Scientific studies consider the individual crown shape and the spatial organization of trees within the orchard, which encompass tree height, planting distances, alley width and/or the leaf area index (LAI). Therefore, eco-physiological studies are mostly dedicated to the optimisation of orchard performances, highlighting the importance of light interception and distribution. At orchard level, the individual tree is often considered as a black box, and... |
| Tipo: Conference Paper |
Palavras-chave: HORTICULTURE DURABLE TRAINING SYSTEMS; ECOPHYSIOLOGY; PESTS; DISEASES; MODELING. |
| Ano: 2009 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200955b6e9d6&uri=/notices/prodinra1/2010/03/ |
| |
|
| |
|
|
| 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/ |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Massonnet, C.; Regnard, J.L.; Costes, E.; Sinoquet, H.; Ameglio, T.. |
| Temporal and spatial variations of photosynthesis and transpiration are particularly important when considering vegetative growth and fruit variability in fruit trees. Spatial variation of physiological processes depends on light distribution, which in turn depends on the relative position of main branches and geometry of their foliage. The general aim of this research was to investigate the capacity of RATP (radiation absorption, transpiration, photosynthesis) functional-structural model to adequately simulate the within-tree behavior of fruiting branches at an intra-hourly step-time. This paper presents the parameterization of this model on the apple tree, comparing two cultivars, and some first attempts at running the model. The experiments were carried... |
| Tipo: Conference Paper |
Palavras-chave: CONDUCTION STOMATIQUE; DIVERSITE INTRA-SPECIFIQUE STOMATAL CONDUCTANCE; WATER EXCHANGE; CARBON ASSIMILATION; INTRA-SPECIFIC DIVERSITY; MODELING. |
| Ano: 2006 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007234a0ac6&uri=/notices/prodinra1/2007/11/ |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Sinoquet, H.; Stephan, J.; Sonohat, G.; Lauri, P.E.; Monney, P.. |
| Simple models of light interception are useful to identify the key structural parameters involved in light capture. We developed such models for isolated trees and tested them with virtual experiments. Light interception was decomposed into the projection of the crown envelope and the crown porosity. The latter was related to tree structure parameters.Virtual experiments were conducted with three-dimensional (3-D) digitized apple trees grown in Lebanon and Switzerland, with different cultivars and training. The digitized trees allowed actual values of canopy structure (total leaf area, crown volume, foliage inclination angle, variance of leaf area density) and light interception properties (projected leaf area, silhouette to total area ratio, porosity,... |
| Tipo: Journal Article |
Palavras-chave: INTERCEPTION DE LA LUMIERE; NUMERISATION TRI-DIMENSIONNELLE CANOPY ENVELOPE; CLUMPING; ISOLATED TREE; LIGHT INTERCEPTION; MODELLING; POROSITY; THREE-DIMENSIONAL (3-D) DIGITIZING. |
| Ano: 2007 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200746bb7b37&uri=/notices/prodinra1/2008/07/ |
| |
|
| |
|
|
| Balandier, P.; Sinoquet, H.; Frak, E.; Giuliani, R.; Vandame, M.; Descamps, S.; Coll, L.; Adam, B.; Prevosto, B.; Curt, T.. |
| Two-year-old Fagus sylvatica L. saplings were planted under the cover of a Pinus sylvestris L. stand in the French Massif Central. The stand was differentially thinned to obtain a gradient of transmitted photosynthetically active radiation (PAR(t): 0-0.35). Eighteen Fagus saplings were sampled in this gradient, and their growth (basal stem diameter increment) was recorded over six years. Over the same period, morphological parameters (leaf area, number and arrangement in space) were monitored by 3D-digitization. Photosynthetic parameters were estimated with a portable gas-exchange analyzer. Photosynthesis was mainly related to light availability, whereas sapling morphology was mainly driven by sapling size. Annual stein diameter increment was related to... |
| Tipo: Journal Article |
Palavras-chave: FOREST REGENERATION; LEAF NITROGEN CONTENT; PHOTOSYNTHETIC PARAMETERS; SILHOUETTE TO TOTAL LEAF AREA RATIO (STAR). |
| Ano: 2007 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200757001434&uri=/notices/prodinra1/2008/08/ |
| |
| Registros recuperados: 22 | |
|
|
|
