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Registros recuperados: 15
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A modelling approach to optimize the management of pea-barley intercropping in Europe Inra
Launay, M.; Brisson, N.; Satger, S.; Hauggaard-Nielsen, H.; Corre-Hellou, G.; Kasynova, E.; Jensen, E.S.; Gooding, M.J.; Dahlmann, C.; Von Fragstein, P.; Pristeri, A.; Romeo, M.; Monti, M..
Tipo: Conference Paper Palavras-chave: CROP MODEL; INTERCROPPING; YIELD; NITROGEN.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011a6730347&uri=/notices/prodinra1/2011/04/
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A novel method for the sustainable management of wheat crops: exploration by simulation Inra
Chatelin, M.H.; Aubry, C.; Garcia, F..
Designing crop management strategies to meet both environmental and economic objectives is a growing preoccupation for advisers and researchers, in the move towards sustainable development. We describe here a simple and original method designed to facilitate this task and appropriate field experimentation. This method involves the use of a multi-stage procedure in which a simulation tool is used to explore a decisional space defined by an expert. As a case study, we designed crop management strategies for winter wheat in the Paris Basin. We aimed to maintain a high wheat yield of more than 9 t.ha-1 and grain quality whilst limiting the risks of nitrogen pollution by maintaining post-harvest soil nitrogen content below 30 kg.ha-1. The method was applied on...
Tipo: Journal Article Palavras-chave: CROP MODEL; SIMULATION; DECISION SUPPORT SYSTEM; WINTER WHEAT; EXPLORATION.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20084a9b0b79&uri=/notices/prodinra1/2010/08/
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Carbohydrate remobilization from storage root to leaves after a stress release in sugar beet (Beta vulgaris L.): experimental and modelling approache Inra
Launay, M.; Graux, A.I.; Brisson, N.; Guerif, M..
Carbohydrate remobilization from the sugar beet storage root to support leaf regrowth after release from water stress was demonstrated by experimental and modelling approaches. Experimental trials were carried out in northern France in 1994 and 1995 and in southern France in 2005, in conditions that involved a succession of soil moisture stresses and re-hydrations. Drought stress slowed leaf growth and the subsequent release of stress resulted in regrowth. A second trial showed that after total defoliation, sugar beet was able to produce new leaves. It was assumed that this leaf renewal, observed at drought stress release or after defoliation, relied on the possibility of remobilizing carbohydrates from storage roots to above-ground organs. This assumption...
Tipo: Journal Article Palavras-chave: ALLOCATION RESSOURCE; RESERVE METABOLIQUE; SUCRE SOLUBLE CARBOHYDRATES; RESOURCE ALLOCATION; SOURCE-SINK RELATIONSHIPS; DEFOLIATION; WATER STRESS; DROUGHT STRESS; CROP MODEL; LEAF GROWTH.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20118ff14dd4&uri=/notices/prodinra1/2011/02/
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Describing the possible climate changes in France and some examples of their effects on main crops used in livestock systems Inra
Ruget, F.; Moreau, J.C.; Ferrand, M.; Poisson, S.; Gate, P.; Lacroix, B.; Lorgeou, J.; Cloppet, E.; Souverain, F..
The effects of climate change on forage and crop production are an important question for the farmersand more largely for the food security in the world. Estimating the effect of climate change on agriculturalproduction needs the use of two types of tools: a model to estimate changes in national or local climates and another model using climatic data to estimate the effects on vegetation. In this paper, we will mainly present theeffects of climate change on climatic features, the variability of criteria influencing crop production in variousregions of France and some possible effects on crops
Tipo: Journal Article Palavras-chave: CLIMATE CHANGE; FOOD SAFETY; AGROMETEOROLOGY; CROP MODEL.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011e2b04823&uri=/notices/prodinra1/2011/01/
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Establishment of quinoa (Chenopodium quinoa Willd.) and simulation of its cultivation with the STICS crop model Inra
Lebonvallet, S.; Brisson, N.; Raffaillac, J.P.; Launay, M..
Tipo: Conference Paper Palavras-chave: CROP MODEL; YIELD; DROUGHT; CULTURAL PRACTICES CHENOPODIUM QUINOA.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20118d8e17b9&uri=/notices/prodinra1/2011/03/
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Exploring options for managing strategies for pea-barley intercropping using a modeling approach Inra
Launay, M.; Brisson, N.; Satger, S.; Hauggaard-Nielsen, H.; Corre-Hellou, G.; Kasynova, E.; Ruske, R.; Jensen, E.S.; Gooding, M.J..
A modeling study was carried out into pea-barley intercropping in northern Europe. The two objectives were (a) to compare pea-barley intercropping to sole cropping in terms of grain and nitrogen yield amounts and stability, and (b) to explore options for managing pea-barley intercropping systems in order to maximize the biomass produced and the grain and nitrogen yields according to the available resources, such as light, water and nitrogen. The study consisted of simulations taking into account soil and weather variability among three sites located in northern European countries (Denmark, United Kingdom and France), and using 10 years of weather records. A preliminary stage evaluated the STICS intercrop model’s ability to predict grain and nitrogen yields...
Tipo: Journal Article Palavras-chave: CROP MODEL; INTERCROP; YIELD; NITROGEN.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011ee37c335&uri=/notices/prodinra1/2011/04/
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Improved estimation of mountain grassland production by using local input data in a crop model Inra
Ruget, F.; Godfroy, M.; Plantureux, S..
Tipo: Conference Paper Palavras-chave: PRODUCTION FOURRAGERE; MODELE DE CULTURE GRASSLAND; CROP MODEL; MOUNTAIN CLIMATE; FUNCTIONAL TRAITS.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201110c70db&uri=/notices/prodinra1/2011/01/
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Modeling tiller density, growth, and yield of mediterranean perennial grasslands with STICS Inra
Ruget, F.; Satger, S.; Volaire, F.; Lelièvre, F..
A generic crop model (STICS) was adapted (STICS–Grassland) to model growth, yield, and environmental impacts of grasslands in France. It is a semimechanistic model combining equations of physiological processes and mathematical relationships between processes in a daily time step. The Information et Suivi Objectif des Prairies (ISOP; Grassland Information and Objective Survey) application was developed to estimate and map the real-time status of grass growth and forage production in the 200 forage regions of France, to help decision makers anticipate forage availability in case of severe defi cits. Initially, the model could not simulate long, severe droughts typical of mediterranean regions when plant and tiller densities are significantly reduced. A...
Tipo: Journal Article Palavras-chave: PRAIRIE PERENNE; OUTIL DE DECISION; SUIVI OBJECTIF DES PRAIRIES; ESTIMATION DU RENDEMENT FOURRAGER CROP MANAGEMENT; CROP MODEL; FORAGE AVAILABILITY; TILLER DENSITY; PERENNIAL GRASSLAND; GRASSLAND INFORMATION AND OBJECTIVE SURVEY; ISOP.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010aefcbb21&uri=/notices/prodinra1/2010/08/
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Modélisation de l'impact des changements climatiques sur la production de la luzerne Inra
Abdessemed, A..
Le réchauffement climatique est devenu une réalité incontournable et la réflexion pour trouver des moyens d’adaptation en agriculture devient un sujet d’actualité. Dans ce but la recherche de cultures qui sauront s’adapter aux contraintes climatiques futures devient une urgence. La Luzerne, a priori semble être une bonne alternative pour d’un côté s’adapter aux changements climatiques et de l’autre donner de bons rendements. L’objectif de cette étude est de voir grâce à la modélisation les potentialités de cette culture. Pour atteindre ce but notre démarche s’inscrit en deux étapes : la première est de simuler le comportement de cette plante à l’aide du modèle STICS. La deuxième étape est de voir comment évoluera cette culture sous des climats futurs. Ces...
Tipo: Thesis Palavras-chave: MODELE DE CULTURE GLOBAL WARMING; LUCERNE; CLIMATIC CHANGE; YIELD; CROP MODEL; CARBON DIOXIDE.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011c028ba38&uri=/notices/prodinra1/2011/03/
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Remote sensing and detection of nitrogen status in crops. Application to precise nitrogen fertilization Inra
Guerif, M.; Houlès, V.; Baret, F..
Remote sensing techniques offer a unique solution for mapping the growth and nitrogen status of crops and monitoring its time course. Therefore these maps are powerful tools for recommending spatially precise cultural practices, and particularly nitrogen dressing. In this paper, we review the main issues to be addressed for estimating crop variables from remote sensing and for using them for managing variable rate fertilizer application.The derivation of canopy state variables such as the leaf area index (LAI) and chlorophyll content (Cab) is first addressed. It is demonstrated that the inversion of radiative transfer models leads to useful estimates of these variables. However, because of the ill-posed nature of the inverse problem, better accuracy is...
Tipo: Meeting Paper Palavras-chave: CHLOROPHYLLE NITROGEN; CHLOROPHYLL; LEAF AREA INDEX; LAI; FERTILIZATION; REMOTE SENSING; CROP MODEL; PRECISION AGRICULTURE.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200795287ab1&uri=/notices/prodinra1/2010/11/
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Scaling up to whole-plant and crop levels short-term responses of leaf growth to water deficit Inra
Chenu, K.; Chapman, S.C.; Hammer, G.L.; McLean, G.; Fournier, C.; Tardieu, F..
Introduction : One challenge of FSPM in ecophysiology is to bridge the gap between physiological andgenetic studies that focus on short-term mechanisms, and whole-plant models designed topredict biomass accumulation, transpiration and yield in field conditions. We developed here amodel of leaf growth and development in maize and interfaced it with the crop model APSIMfor simulation at canopy level.
Tipo: Conference Paper Palavras-chave: LEAF ELONGATION; LEAF DEVELOPMENT; WATER DEFICIT; CROP MODEL.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20093acd7fff&uri=/notices/prodinra1/2009/03/
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Short-term responses of leaf growth rate to water deficit scale up to whole-plant and crop levels: an integrated modelling approach in maize Inra
Chenu, K.; Chapman, S.C.; Hammer, G.L.; McLean, G.; Ben Haj Salah, H.; Tardieu, F..
Physiological and genetic studies of leaf growth often focus on short-term responses, leaving a gap to whole-plant models that predict biomass accumulation, transpiration and yield at crop scale. To bridge this gap, we developed a model that combines an existing model of leaf 6 expansion in response to short-term environmental variations with a model coordinating the development of all leaves of a plant. The latter was based on: (1) rates of leaf initiation, appearance and end of elongation measured in field experiments; and (2) the hypothesis of an independence of the growth between leaves. The resulting whole-plant leaf model was integrated into the generic crop model APSIM which provided dynamic feedback of environmental conditions to the leaf model and...
Tipo: Journal Article Palavras-chave: CROP MODEL; DEVELOPMENT; LEAF AREA; LEAF ELONGATION; TEMPERATURE; VAPOUR PRESSURE DEFICIT; WATER DEFICIT.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200895e1eb25&uri=/notices/prodinra1/2008/09/
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SIMBA, a model for designing sustainable banana-based cropping systems Inra
Tixier, P.; Malezieux, E.; Dorel, M.; Wéry, J..
Banana monocultures (Musa spp., AAA, Cavendish sub-group cv. Grande Naine) can have a detrimental impact on the environment. In these agro-systems, pesticide treatments can lead to surface and groundwater pollution, as is the case in the tropical insular conditions of the French West Indies. Using models to design alternative cropping systems is of growing interest but most of the research work has been concentrated on annual crops and most often in temperate climate. A specific model called SIMBA was built to assess environmental risks under a large range of cropping techniques and to help design more sustainable cropping systems. SIMBA simulates banana-cropping systems at field level over several cropping cycles. It includes sub-models that simulate soil...
Tipo: Journal Article Palavras-chave: CROP MODEL; AGRO-ENVIRONMENTAL INDICATORS; MULTICRITERIA EVALUATION.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20104a94d836&uri=/notices/prodinra1/2010/02/
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Study of the impact of climate change on disease dynamic through the development of a model of pathogens coupled with the STICS crop model Inra
caubel, J.; Bourgeois, G.; Launay, M.; Brisson, N..
Tipo: Conference Paper Palavras-chave: CLIMATE CHANGE; DISEASE DEVELOPMENT; CROP MODEL.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011bb10df30&uri=/notices/prodinra1/2011/03/
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The Azodyn crop model as a decision support tool for choosing cultivars Inra
Barbottin, A.; Le Bail, M.; Jeuffroy, M.H..
We evaluated the Azodyn wheat crop model as a cultivar decision support tool using a set of 14 genotypes, tested in 21 contrasting environments. The results showed that the Azodyn crop model satisfactorily simulated yield and grain protein content for a large range of genotypes and environments, as shown by a root mean square error of 1.4 Mg ha-1 and 1.7 g 100 g MS-1, respectively. The comparison between the observed and the simulated rankings of genotypes showed a ranking error of the model of one rank or less. The model was able to identify the best genotype to be used to obtain the highest yield in 20 cases out of 33 and the highest grain protein content in 48 cases out of 64. As a new way to evaluate crop models as a decision support tool for cultivar...
Tipo: Journal Article Palavras-chave: CROP MODEL; CULTIVAR; DECISION SUPPORT TOOL; CULTIVAR USER; MODEL EVALUATION.
Ano: 2006 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200779dc686c&uri=/notices/prodinra1/2010/08/
Registros recuperados: 15
Primeira ... 1 ... Última
 

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