n/a@.dne; Agriculture Canada, Research Station, P.O. Título. The rate of N uptake of crops is highly variable during crop development and between years and sites. PARTIE I - Un département Environnement et Agronomie à l’Inra :une stratégie de recherche. G Lemaire… In grassland Gilles Lemaire Institut National de la Recherche Agronomique (INRA), France The editor and reviewers' affiliations are the latest provided on their Loop research profiles and may not reflect their situation at the time of review. Año; Tissue flows in grazed plant communities. Crop growth is modelled using a set of mathematical equations, based on physiological processes and environmental variables. Gilles Lemaire, directeur de recherche à l’Inra (Institut national de recherches agronomiques) est le nouveau président du Conseil scientifique de Farre (Forum de l’agriculture raisonnée respectueuse de l’environnement). Agricultural territories are structured in relation with the different goals assigned to agriculture. An ecophysiological approach to modelling ressource fluxes in competing plants. UFRGS, Federal University … a Unit´e d’Ecophysiologie des Plantes Fourrag`eres, Centre INRA Poitou-Charentes, 86600 Lusignan, France b UMR Agronomie INRA-AgroParisTech, 78850 Thiverval-Grignon, France ... E-mail address: gilles.lemaire@lusignan.inra.fr (G. Lemaire). The objective was to study the relationship between leaf length and tillering in perennial ryegrass (Lolium perenne L.). In general, perennial pastures had greatest concentra- Soussana and Lemaire described the coupling of C and N tion of total organic C and in various physical fractions, while … MAHMOUN KHAITY, MAHMOUN KHAITY ‡ * Station d'Ecophysiologie, INRA. 2008, 35 p. ⟨hal-01173744⟩. Tiller size and tiller density are determined by several major morphogenetical components. Lemaire G., Cruz P., Gosse G., Chartier M., 1985. A total of 14 destructive plant harvests were made: when plants were in an A dense sward cont... A two‐year experiment (1996–1998) was conducted at Hamilton, New Zealand, to compare the productivity of perennial ryegrasses from different ecotypes, under rotational grazing by dairy cows. (brown litter). Abad Chabbi is at INRA, France. Ouvrages scientifiques (édition ou co-écriture), Écophysiologie des cultures fourragères, Institut National de la Recherche Agronomique, Fertilisation des cultures : des bases scientifiques renouvelées, https://doi.org/10.1007/s13593-019-0570-6, https://lorexplor.istex.fr/index.php?title=Gilles_Lemaire&oldid=2086, Creative Commons attribution partage à l'identique. Internode cell walls were analysed by chemical fractionation using a mild delignification step aiming a... Organic reserves in below-ground storage organs are generally recognized as indicators of regrowth and persistence potential of forages. Pampa natural grasslands is part of the Río de la Plata natural grasslands, the largest natural grassland biog... pages 73-75Understanding biogeochemical cycles, environmental fluxes and biodiversity is critical to I Pastures can be used to enhance C storage and limit... A need to increase agricultural production across the world to ensure continued food security appears to be at odds with the urgency to reduce the negative environmental impacts of intensive agriculture. Lemaire G., Wilkins R., Hodgson J., 2005. Lemaire G., Franzluebbers A., Carvalho P.C., Dedieu B., 2014. Agronomie. It is shown that defoliation related variation in leaf area and associated morphogenetic changes in plant structure necessitate slope corrections, designated Ca and Cr , respectively. [Contrat] auto-saisine. Performances des rotations à base de cultures fourragères en termes de gaz à effet de serre (GES) et bilan carbone, Impact of land use changes on soil carbon pools, gross nitrogen fluxes and nitrifying and denitrifying communities, Toward agricultural sustainability through integrated crop–livestock systems. The amount of carbohydrate determines whether there are sufficient carbon skeletons and sufficient energy available to support synthesis of new material. All rights reserved. Dr Gilles LEMAIRE has had a 40 year research career at INRA Center in Lusignan devoted to ecophysiology of grasslands and forage crops, grazing ecology and plant-herbivore interactions. Shoot N concentration in plants decreases as they get bigger, due to the fact that N accumulates less rapidly than dry matter in plants during the plant growth process, leading to an allometric relationship between shoot N content (N(sh)) and shoot mass (W(sh)): N(sh)=a(W(sh))b. Directeur de recherche INRA Lusignan. Dirección de correo verificada de lusignan.inra.fr. gilles.lemaire.inra@gmail.com. ... Ohio State University, 2021 Coffey Road, Columbus, OH 43210-1086, USA. "Impacts of grasslands on biogeochemical cycles, environ-mental fluxes and biodiversity within arable cropping systems". Ecophysiology of Forage Plants Unit (UEPF), INRA, Lusignan. Abad Chabbi is at INRA, France. Europe and Lodi). INRA started the research in the 1980s and focused on the theory and development of PCDC. Nimai Senapati. Storage of carbohydrates in roots is important for lucerne survival and regrowth rate, begins during initial growth. Dernière modification de cette page le 22 janvier 2020, à 12:45. Box 20280, Fredericton, NB, E3B 4Z7 Canada. In experiment 1, two DHA (low and medium, 19 and 26 kg organic matter [OM]/cow/day) were compared in a continuous design using two groups of five cows. Sorry, you need to be a researcher to join ResearchGate. Search for other works by this author on: Oxford Academic. L'étude se... Les prairies participent à la régulation des cycles biogéochimiques, notamment par l'accumulation de la matière organique dans les sols, la séquestration de C atmosphérique et l'atténuation des risques d'entraînement d'azote vers les hydrosystèmes. Shoot N concentration in plants decreases as they get bigger, due to the fact that N accumulates less rapidly than dry matter Directeur de recherche INRA Lusignan. Gilles Lemaire est directeur de recherche à l’Inra, retraité (2009). I On the Critical N Concentration in Agricultural Crops.- 1 N Uptake and Distribution in Plant Canopies.- 2 Use of the Nitrogen Nutrition Index for the Analysis of Agronomical Data.- II The Nitrogen Requirement of Major Agricultural Crops.- 3 Grasslands.- 4 Wheat, Barley, and Durum Wheat.- 5 Maize and Sorghum.- 6 Grain Legumes.- 7 Potatoes.- 8 Mixe... Natural grasslands have a very large range of diversity both in terms of botanical composition, and with respect to edaphic and climatic conditions, in temperate and tropical regions. For maize (Zea mays L.), several studies have contributed to develop separate critical N curves for different genotype, environment, and management (GxExM) combinations, but so far no rigorous analysis has b... Due to the asymptotic nature of the crop yield response curve to fertilizer N supply, the nitrogen use efficiency (NUE, yield per unit of fertilizer applied) of crops declines as the crop N nutrition becomes less limiting. Citado por. Search for other works by this author on: Oxford Academic. Alan Franzluebbers USDA, Agricultural Research Service Verified email … Retired.Search for more papers by this author. Gilles Lemaire, B. Nicolardot, Institut national de la recherche agronomique (France) Editions Quae, ... Issue 83 of Colloques de l'INRA: Editors: Gilles Lemaire, B. Nicolardot, Institut national de la recherche agronomique (France) Publisher: Editions Quae, 1997: ISBN: 2738007643, 9782738007643: Length: Gilles Lemaire Directeur de recherche INRA Lusignan Verified email at lusignan.inra.fr. School of Agriculture and Environment PN433, Massey University, Palmerston North, New Zealand. Loop enables you to stay up-to-date with the latest discoveries and news, connect with researchers and form new collaborations. Around the world, intensification has been associated with massive simplification and uniformity at all levels of organization, i.e., field, farm, landscape, and region. INRA Lusignan (France). Lemaire G., Millard P., 1999. The successful achievement of a highly productive understorey pasture in silvopastoral systems depends on the use of well-adapted forage genotypes, showing good agronomic performance and persistence under shading and grazing. 86600 Lusignan. INRA started the research in the 1980s and focused on the theory and development of PCDC. Lemaire G., Kronberg S., Recous S., de Facio de Carvalho P.C., 2018. Moreover, grasslands are subjected to a wide variety of defoliation treatments according to management plans. In order to adjust models of biomass accumulation as a function of photosynthetically active radiation absorbed (P... Grasslands have to be considered not only as a means for human food production but also as a means for providing ecosystem services. expertise scientifique collective. This book chapter considers the role of N in plant growth culminating in harvested yield, providing an integrated view of the mechanisms upon which food production depends. In arable and forage cropping, N fertilization practices can provide a sufficient N supply for plants to achieve the potential growth allowed by the amount of energy intercepted by the crop. Growth of roots, tillers/stems and le... Herbage regrowth after defoliation of forage species involves the mobilization of nitrogen from source organs (i.e. 1. In the last 40 years, the global use of mineral N fertilizers has increased to support increasing food demand. The -3/2 power rule, or -3/2 self-thinning rule, was accepted 10 years ago as an important generalization, but has recently been questioned by a number of authors. roots and crown) to regrowing shoot tissues. In particula... Nitrogen (N) is often considered to be the most important limiting factor, after water deficiency, for biomass production in natural ecosystems. Lemaire G., Jeuffroy M.H., Gastal F., 2008. Critical N concentration has been defined as the minimum N concentration which allows maximum growth rate. Verified email at rothamsted.ac.uk - Homepage. Book description. II. Nicolas Tremblay. This introductory paper presents the overall objective and organization of the book. Bertrand Hirel Unité de Nutrition Azotée des Plantes , INRA, Route de St Cyr , 78026, Versailles, Cedex, France & Gilles Lemaire Unité d'Ecophysiologie des Plantes Fourragères INRA , 86600, Lusignan, France Integrated Crop-Livestock Systems: Strategies to achieve synergy between agricultural production and environmental quality. Lemaire et al. Gilles Lemaire, Paulo César De Faccio Carvalho, ... Sylvie Recous. Corresponding Author. Loop is the open research network that increases the discoverability and impact of researchers and their work. Allometric approach to crop nutrition and implications for crop diagnosis and phenotyping: A review. It has been suggested that the relationship between the critical N concentration and dry matter per unit ground area for a wide range of crops is the same and is independent of climatic zone. Affiliations 1 INRA UR4, P3F, 86600, Lusignan, France. Box 20280, Fredericton, NB, E3B 4Z7 Canada. By table of contents. Loop enables you to stay up-to-date with the latest discoveries and news, connect with researchers and form new collaborations. II. What is the Link between Environmental Issues and Agronomy? Après la période de la diffusion de la Révolution... Agroecosystem Diversity: Impact on Food Security and Environmental Quality presents cutting-edge exploration of developing novel farming systems and introduces landscape ecology to agronomy. GILLES LEMAIRE * Station d'Ecophysiologie, INRA. J. Agronomy 28 (2008) 614–624 Diagnosis tool for plant and crop N status in vegetative stage Theory and practices for crop N management Gilles Lemairea,∗, Marie-H´el ene Jeuffroy` b, Franc¸ois Gastala a Unit´e d’Ecophysiologie des Plantes Fourrag`eres, Centre INRA Poitou-Charentes, 86600 Lusignan, France agriculture Review Allometries in Plants as Drivers of Forage Nutritive Value: A Review Gilles Lemaire 1,* and Gilles Belanger 2 1 INRA, Centre nouvelle Aquitaine, 86600 Lusignan, France 2 Agriculture and Agri-Food Canada, Quebec Research and Development Centre, Québec, QC G1V 2J3, Canada; gilles.belanger@canada.ca * Correspondence: gilles.lemaire.inra@gmail.com Tissue flows in grazed communities. Les préoccupations environnementales peuvent être parfois convergentes et synergiques avec la recherche de l'autonomie alimentaire. Station d'Ecophysiologie des Plantes Fourragères INRA, Centre de Recherches de Lusignan, 86600 Lusignan, France. Paulo César De Faccio Carvalho. Around the world, intensification has been associated with massive simplification and uniformity at all levels of organization, i.e., field, farm,... * Intervention présentée aux Journées de l'AFPF, "La fertilité des sols dans les systèmes fourragers", les 8 et 9 avril 2015* Erreurs dans les affiliations. Cory Matthew. Only verified researchers can join ResearchGate and send messages to other members. Lemaire G., Hodgson J., de Moraes A., de F. Carvalho P.C., Nabinger C., eds., 2000. Misuse of fertilizer has led to environmental problems in some regions and the rarefaction of energy leads to an increasing cost of mineral N fertilizers. The influence of litter quality on plant litter decomposition rates is a crucial aspect of the soils C cycle. Improved nitrogen use efficiency (NUE: capacity to produce a supplement of yield for each added unit of N fertilizer) has the potential to enhance yield under low nitrogen (N) and thereby improve crop nutritional quality while reducing ground water contamination by nitrates. Role of crop-livestock integration Gilles LEMAIRE Honorary Director of Research, INRA, Lusignan, France Abstract Most of the environmental impacts of modern agriculture are due more to a … ... Honorary Director of Research, INRA Lusignan, France. Título. The deadline for abstract submission is 1 st July 2019. Membre de l’Académie d’Agriculture de France. Dirección de correo verificada de lusignan.inra.fr. Chapitre2. In this paper, sets... Plant-based measurements can be used to diagnose the in-season N status of corn (Zea mays L.). The effect of level of nitrogen application upon the dynamics of herbage growth in a continuously grazed sward of tall fescue was investigated during two successive years. However, under ample soil N availability, crop N accumulation is highly related to crop growth rate and to biomass accumulation. Gilles Lemaire est directeur de recherche à l’Inra,retraité (2009). Citado por. César de Faccio Carvalhob, Gilles Lemairea, Jean-Claude Emilec, Jean-Louis Duranda,∗ a Unité de Recherche Pluridisciplinaire Prairies et Plantes Fourragères, INRA, Lusignan 86600, France b Universidade Federal doRio Grande Sul, Av. Our objective was to assess the relationship between the corn nitrogen nutrition index (NNI), an index based on whole plant N concentration, and leaf nitrogen concentration of the uppermost collared leaf expressed on the basis of dry matter (DM; N(L)) or... Pampa is one of the six officially recognized biomes in Brazil and represents 2.07% (176,496 km2) of its territory. Artículos Citado por. Chapitre1. Search for more papers by this author. The frequency of shoot removal in lucerne (Medicago sativa L.) has long been recognized as a key factor in its management and productivity. Google Scholar. Gilles Lemaire. Gilles Lemaire. Citado por. However,... L’évapotranspiration réelle (ETR) constitue l’un des termes essentiels du cycle hydrologique et l'un des plus difficiles à mesurer. As requested in the Guide for Authors of EJA, authors of all papers either invited or offered have first to provide a title and an abstract to the Lead Guest Editor, Dr Gilles LEMAIRE (gilles.lemaire.inra@gmail.com). Nowadays for environmental and economical reasons target yield of farmers can be lower than the potential crop yields as permitted by soil and climatic conditions. The dynamics of dry-matter accumulation and nitrogen uptake of sorghum and maize crops were compared over two successive years under dry and irrigated conditions. Theory and practices for crop N management. Search for more papers by this author. Salón Juan de Garay Norte Across a range of crops, the critical N uptake is related to W by a power function with a coefficient less than unity that suggests crop N uptake is co-regulated by both soil N supply and biomass accumulation. réduire la vulné rabilité de l'agriculture à un risque accru de manque d'eau. Critical N c... Herbage yield of alfalfa (Medicago sativa L.) depends on forage management or environmental conditions that change C and N resource acquisition, and endogenous plants factors such as root organic reserves and number of active meristems. Agronomie, 5 : 685-692. The work tested whether nitrogen (N) fertiliser or irrigation (Irr) could manipulate the persistence strategies of these morphologica... L'autonomie protéique des élevages de ruminants passe par l'autonomie alimentaire globale des troupeaux du fait d'interactions étroites entre énergie et protéines. Elles concernent des espaces territoriaux dont les con... Tiller turnover at flowering is an integral component of the perennation strategy in many temperate grasses. Corresponding Author. John Hodgson is Professor Emeritus of Pastoral Science, Massey University, New Zealand. Numéro 83 de Colloques de l'INRA: Rédacteurs: Gilles Lemaire, B. Nicolardot, Institut national de la recherche agronomique (France) Éditeur: Editions Quae, 1997: ISBN: 2738007643, 9782738007643: Longueur: 333 pages : Exporter la …
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