Search results for "Geta"

showing 10 items of 3789 documents

Les systèmes en semis direct sous couvert : Impacts de l'abandon du travail du sol et des couverts sur la flore adventice ?

2019

Les systèmes de culture conduits en semis direct sous couvert sont basés sur une réduction totale du travail du sol et une couverture du sol maximale (couverts, mulch). Les modifications d'habitats induites par la mise en place de ces pratiques peuvent agir sur la composition qualitative et quantitative de la flore adventice des cultures, en particulier lorsque la période d'inter-culture est longue (succession cultures d'hiver-cultures d'été). Matériel & Méthodes : La flore spontanée de cultures de blé d'hiver et de soja a été suivie sur une vingtaine de parcelles. Des relevés selon un itinéraire en W sur une zone de 2000m2 ont été réalisés à 2 (soja) ou 3 (blé) périodes pendant l'année cul…

[SDV] Life Sciences [q-bio][SDE] Environmental Sciencesnon travail du sol[SDV]Life Sciences [q-bio][SDE]Environmental Sciences[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal Biologyadventicescouverture végétaleComposition
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Nuclear protein acetylation in the control of plant defense responses: role of type-2 histone deacetylases

2015

[SDV] Life Sciences [q-bio][SDE] Environmental Sciencesnuclear protein[SDV]Life Sciences [q-bio][SDE]Environmental Sciencestype-2 histone deacetylase[SDV.BV]Life Sciences [q-bio]/Vegetal Biologyplant[SDV.BV] Life Sciences [q-bio]/Vegetal Biologydefense responseacetylation
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Quelles pratiques permettent de réduire les herbicides sans perdre du rendement ? Diagnostic de pratiques d'agriculteurs

2019

L'objectif était d'analyser les pratiques d'agriculteurs afin de comprendre les relations entre usage d'herbicides, niveau d’infestation par les adventices et pertes de rendement. Nous avons collecté et simulé avec FLORSYS 272 systèmes de culture d'agriculteurs de 7 régions avec la flore adventice typique de ces régions, puis sans aucune adventice, et enfin sans l’usage d’herbicides (et ce sans changer les autres pratiques). Les résultats montrent que (1) la perte de rendement augmente avec la biomasse adventice, (2) il n'y a pas de corrélation entre IFT herbicide d'une part, biomasse adventice et perte de rendement d'autre part (3) les agriculteurs compensent la réduction herbicide par des…

[SDV] Life Sciences [q-bio][SDE] Environmental Sciencesnuisibilitépratiques alternativesperte de rendementIFT herbicide[SDV]Life Sciences [q-bio][SDE]Environmental Sciences[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal Biologysimulationadventice
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Le numérique au service de la durabilité de l'agriculture : contribution et implication de la recherche

2019

National audience; La communauté scientifique peut s'interroger pour savoir si la révolution numérique est porteuse de promesses pour rendre plus rapide, plus direct et plus simple l'avènement d'une agriculture durable sur tous les fronts économiques, environnementaux et sociaux. Les travaux scientifiques en agroécologie soulignent l'importance des processus biologiques qui sous-tendent l'efficacité et la maitrise des pratiques. Le constat est qu'encore trop peu d'avancées numériques visent explicitement à alimenter la qualification, la quantification puis la certification du fonctionnement de l'agroécosystème ou permettre un pilotage de processus éminemment dynamiques. On peut énoncer sans…

[SDV] Life Sciences [q-bio][SDE] Environmental Sciencesnumériqueagriculture durable[SDV]Life Sciences [q-bio]agroécologie[SDE]Environmental Sciences[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal Biology
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Interaction between Medicago truncatula and the pathogenic oomycete Aphanomyces euteiches: effects of nitrogen nutrition and plant genotype

2015

Plants are under the constant threat of microbial pathogens. To defend themselves, plants have developed immune responses (including for example synthesis of antimicrobial secondary metabolites, production of PR proteins or reinforcement of cell wall) that can lead to resistance. However, these plant defense responses are costly and lead plants to continuously face a dilemma regarding the partitioning of their available resources. In order to better understand relationships between plant nutrition and defense, we analyzed the impact of nitrogen (N) nutrition on the capacity of different M. truncatula genotypes to resist against A. euteiches, the causal agent of legume root rot disease. N st…

[SDV] Life Sciences [q-bio][SDE] Environmental SciencesnutritionAphanomyces euteiches[SDV]Life Sciences [q-bio]Medigaco truncatulaplant immune response[SDE]Environmental Sciencesfood and beverages[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal Biologygénotypenitrogen
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Study of the adaptative response of N2 fixation to local N deprivation in peas using environmental and genetic variations

2011

National audience

[SDV] Life Sciences [q-bio][SDE] Environmental Sciencesnutrition[SDV]Life Sciences [q-bio][SDE]Environmental SciencesPeas[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal BiologyN fixationnodulationhypernodulating mutantNComputingMilieux_MISCELLANEOUS
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Contribution à la domestication de l'arganier pour la production de l'huile

2007

A survey conducted in 5 sites in the argan tree forest showed that argan oil represents an important part of the users' incomes. Nut-breaking is the most time-consuming and tedious step for the women involved in oil production. In 3 sites, the women were capable of distinguishing between those trees that yield nuts easy to break and trees yielding nuts difficult to break. These trees were named F and D, respectively. In each site, fruits were harvested from trees identified as F or D by the users, or at random. Those fruits were characterized by a set of measurements, including the force needed to break the nuts. Our measurements pointed out that the nuts harvested from F trees require a lo…

[SDV] Life Sciences [q-bio][SDE] Environmental Sciencesorchardsdomesticationarganiamultiplication vegetativesurveys[SDV]Life Sciences [q-bio][SDE]Environmental Sciences
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Membres du comité d’organisation scientifique

2017

EA BIOME INRA; National audience

[SDV] Life Sciences [q-bio][SDE] Environmental Sciencesorganisation de congrès[SDV]Life Sciences [q-bio][SDE]Environmental Sciences[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal BiologyComputingMilieux_MISCELLANEOUS
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Studying and modelling soil microbial communities dynamics at a landscape scale in response to agricultural practices

2019

Soil microbial communities play a major role in soil fertility and are important as bioindicators to evaluate the impacts of agricultural practices on soils. The challenge is to promote their use in order to support / accelerate innovation by proposing to farmers the tools necessary to assess the impacts of practice modifications on the soil microbial composition before implementing and validating them. The goal of this thesis is to characterize spatial and temporal dynamics of soil microbial communities at the scale of an agricultural landscape in order to create models and propose a Decision Support Instrument (DSI) for stakeholders in the agricultural communities. This will use a multi-d…

[SDV] Life Sciences [q-bio][SDE] Environmental Sciencesparticipatory modelling[SDV]Life Sciences [q-bio][SDE]Environmental Sciences[SDV.BV]Life Sciences [q-bio]/Vegetal Biologyagricultural practices[SDV.BV] Life Sciences [q-bio]/Vegetal Biologyagent based modellingdecision support instrument (DSI)soil microbial ecology
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Studying and modelling the dynamics of soil microbial communities at a landscape scale in response to agricultural practices

2019

National audience; Soil Microbial communities play a major role in soil fertility and are important as bioindicators to evaluate the impacts of agricultural practices on soils. The challenge is to promote their use in order to support / accelerate innovation by proposing to farmers the tools necessary to assess the impacts of practice modifications on the soil microbial composition before implementing and validating them. The goal of this thesis is to characterize spatial and temporal dynamics of soil microbial communities at the scale of an agricultural landscape in order to create models and propose a Decision Support Instrument (DSI) for stakeholders in the agricultural communities. This…

[SDV] Life Sciences [q-bio][SDE] Environmental Sciencesparticipatory modellingagricultural practice[SDV]Life Sciences [q-bio][SDE]Environmental Sciences[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal Biologyagent based modellingdecision support instrument (DSI)soil microbial ecology
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